Add pipeview-tui with ANSI escape sequence rendering

Full ratatui terminal application mirroring pipeview-gui:
- Single-session telemetry console with Text/Hex/Plot views
- Serial/TCP/UDP transport with full parameter config
- DTR/RTS control, auto-reconnect, data send (Text/Hex modes)
- Search with case-sensitive toggle and match navigation
- Interactive config form with inline editing
- ANSI SGR parsing via ansitok: 4-bit, 256-color, true color,
  bold/italic/underline/strikethrough rendering in text view
- Persistent session state via JSON
- Mouse clickable controls and mousewheel scroll/zoom

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

.gitignore

@@ -1 +1,8 @@
 /target
+
+# Compiled binaries in tools/
+tools/test_plot_c
+tools/test_text_c
+
+# Python
+__pycache__/

AGENTS.md

@@ -1,28 +0,0 @@
-# Repository Guidelines
-
-## Project Structure & Module Organization
-`xserial` is a Rust workspace. The root [Cargo.toml](/D:/Dev/xserial/Cargo.toml) defines four crates in `crates/`:
-- `xserial-core`: transport, framing, protocol, and pipeline primitives in `src/`, with integration tests in `tests/pipeline.rs`.
-- `xserial-client`: session management, history, commands, and Lua bindings, with integration tests under `tests/`.
-- `xserial-tui`: terminal app entrypoint in `src/main.rs`.
-- `xserial-gui`: egui/eframe app, with UI panels in `src/panels/` and font helpers in `src/ui_fonts.rs`.
-
-Use `tools/test_plot.py` as a local waveform source for GUI plot testing. Treat `target/` as generated output.
-
-## Build, Test, and Development Commands
-- `cargo check --workspace`: fast compile check for all crates.
-- `cargo test --workspace`: run the workspace test suite, including `crates/xserial-core/tests` and `crates/xserial-client/tests`.
-- `cargo run -p xserial-gui`: launch the desktop GUI.
-- `cargo run -p xserial-tui`: launch the terminal UI.
-- `cargo fmt --all`: apply standard Rust formatting.
-- `cargo clippy --workspace --all-targets -- -D warnings`: catch lint issues before review.
-- `python tools/test_plot.py --help`: inspect options for the TCP plot-frame generator.
-
-## Coding Style & Naming Conventions
-Follow standard Rust formatting: 4-space indentation, trailing commas in multiline literals, and `snake_case` for modules, files, functions, and tests. Use `PascalCase` for structs/enums and `SCREAMING_SNAKE_CASE` for constants. Keep crate boundaries clean: protocol/transport code belongs in `xserial-core`; session and Lua integration belong in `xserial-client`; UI state stays in `xserial-gui` or `xserial-tui`.
-
-## Testing Guidelines
-Prefer focused unit tests next to implementation and integration tests in `crates/<crate>/tests/*.rs`. Name tests after behavior, for example `session_lifecycle` or `pipeline`. Run `cargo test --workspace` before opening a PR; add targeted regression tests for transport, framing, parsing, and session-state fixes.
-
-## Commit & Pull Request Guidelines
-Recent history uses short, imperative subjects such as `Persist GUI font settings` and `Improve session controls and GUI views`, with occasional `feat:` prefixes for major additions. Keep subjects concise and action-oriented. PRs should state which crate(s) changed, list validation commands, and include screenshots or short recordings for GUI/TUI changes. Call out protocol, transport, or Lua API compatibility impacts explicitly.

Cargo.lock

@@ -189,6 +189,16 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "ansitok"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0a8acea8c2f1c60f0a92a8cd26bf96ca97db56f10bbcab238bbe0cceba659ee"
+dependencies = [
+ "nom 7.1.3",
+ "vte",
+]
+
 [[package]]
 name = "anstream"
 version = "1.0.0"
@@ -3262,6 +3272,76 @@ dependencies = [
  "futures-io",
 ]
 
+[[package]]
+name = "pipeview-client"
+version = "0.1.0"
+dependencies = [
+ "mlua",
+ "pipeview-core",
+ "serde",
+ "serde_json",
+ "thiserror 2.0.18",
+ "tokio",
+ "tracing",
+ "tracing-subscriber",
+]
+
+[[package]]
+name = "pipeview-core"
+version = "0.1.0"
+dependencies = [
+ "async-trait",
+ "bytes",
+ "hex",
+ "nom 8.0.0",
+ "serde",
+ "serde_json",
+ "serialport",
+ "thiserror 2.0.18",
+ "tokio",
+ "tokio-serial",
+ "tracing",
+]
+
+[[package]]
+name = "pipeview-gui"
+version = "0.1.0"
+dependencies = [
+ "ansitok",
+ "eframe",
+ "egui",
+ "egui_plot",
+ "hex",
+ "pipeview-client",
+ "pipeview-core",
+ "serde",
+ "serde_json",
+ "tokio",
+ "tracing",
+ "tracing-subscriber",
+]
+
+[[package]]
+name = "pipeview-tui"
+version = "0.1.0"
+dependencies = [
+ "ansitok",
+ "clap",
+ "crossterm 0.28.1",
+ "hex",
+ "image",
+ "mlua",
+ "pipeview-client",
+ "pipeview-core",
+ "ratatui",
+ "serde",
+ "serde_json",
+ "tokio",
+ "tracing",
+ "tracing-appender",
+ "tracing-subscriber",
+]
+
 [[package]]
 name = "pkg-config"
 version = "0.3.33"
@@ -4652,6 +4732,16 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
+[[package]]
+name = "vte"
+version = "0.14.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "231fdcd7ef3037e8330d8e17e61011a2c244126acc0a982f4040ac3f9f0bc077"
+dependencies = [
+ "arrayvec",
+ "memchr",
+]
+
 [[package]]
 name = "vtparse"
 version = "0.6.2"
@@ -5750,71 +5840,6 @@ version = "0.8.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ae8337f8a065cfc972643663ea4279e04e7256de865aa66fe25cec5fb912d3f"
 
-[[package]]
-name = "xserial-client"
-version = "0.1.0"
-dependencies = [
- "mlua",
- "serde",
- "serde_json",
- "thiserror 2.0.18",
- "tokio",
- "tracing",
- "tracing-subscriber",
- "xserial-core",
-]
-
-[[package]]
-name = "xserial-core"
-version = "0.1.0"
-dependencies = [
- "async-trait",
- "bytes",
- "hex",
- "nom 8.0.0",
- "serde",
- "serde_json",
- "serialport",
- "thiserror 2.0.18",
- "tokio",
- "tokio-serial",
- "tracing",
-]
-
-[[package]]
-name = "xserial-gui"
-version = "0.1.0"
-dependencies = [
- "eframe",
- "egui",
- "egui_plot",
- "hex",
- "serde",
- "serde_json",
- "tokio",
- "tracing",
- "tracing-subscriber",
- "xserial-client",
- "xserial-core",
-]
-
-[[package]]
-name = "xserial-tui"
-version = "0.1.0"
-dependencies = [
- "clap",
- "crossterm 0.28.1",
- "hex",
- "image",
- "ratatui",
- "tokio",
- "tracing",
- "tracing-appender",
- "tracing-subscriber",
- "xserial-client",
- "xserial-core",
-]
-
 [[package]]
 name = "yoke"
 version = "0.8.2"

Cargo.toml

@@ -1,10 +1,10 @@
 [workspace]
 resolver = "2"
 members = [
-    "crates/xserial-core",
+    "crates/pipeview-core",
-    "crates/xserial-client",
+    "crates/pipeview-client",
-    "crates/xserial-tui",
+    "crates/pipeview-tui",
-    "crates/xserial-gui",
+    "crates/pipeview-gui",
 ]
 
 [workspace.dependencies]

README.md

@@ -0,0 +1,394 @@
+# pipeview
+
+**跨平台串口 / TCP / UDP 数据观测工具** — 可配置分帧、协议解码、多会话管理、实时波形绘图，单二进制零依赖。
+
+基于 Rust + [egui](https://github.com/emilk/egui) 构建，支持 Lua 脚本扩展。
+
+[English](README_en.md)
+
+---
+
+## 目录
+
+- [功能特性](#功能特性)
+- [快速开始](#快速开始)
+- [完整示例：无人机遥测解析](#完整示例无人机遥测解析)
+- [Lua 脚本开发指南](#lua-脚本开发指南)
+- [架构](#架构)
+- [配置与持久化](#配置与持久化)
+- [开发工具](#开发工具)
+- [技术栈](#技术栈)
+- [License](#license)
+
+---
+
+## 功能特性
+
+### 传输层
+
+| 类型 | 说明 | 配置项 |
+|------|------|--------|
+| **Serial** | 串口通信 | 端口名、波特率 (300–12M)、数据位 (5/6/7/8)、校验位 (None/Odd/Even)、停止位 (1/2)、流控 (None/Software/Hardware)、DTR/RTS 控制 |
+| **TCP** | TCP 客户端 | 目标地址 `host:port` |
+| **UDP** | UDP 通信 | 绑定地址 `host:port`，可选远端地址 |
+
+### 分帧器（Framer）
+
+将原始字节流切分为独立帧。每个 Session 可配置**多条独立管线**，同一字节流并行送入多个 framer→decoder 链路。
+
+| 分帧器 | 说明 | 配置参数 |
+|--------|------|----------|
+| **Line** | 按 `\n` 分割文本行 | `strip_cr`（去除 `\r`）、`max_line_len`（最大行长度） |
+| **Fixed** | 固定字节数为一帧 | `frame_len`（帧长度） |
+| **Length** | 长度前缀协议 | `len_bytes` (1/2/4/8)、`endian` (大小端)、`length_includes_self`、`max_payload` |
+| **COBS** | [Consistent Overhead Byte Stuffing](https://en.wikipedia.org/wiki/Consistent_Overhead_Byte_Stuffing) 编码 | `max_frame`（最大帧长） |
+| **MixedTextPlot** | 单连接混合文本行 + COBS 编码的 plot 帧 | `strip_cr`、`max_line_len`、`max_plot_frame` |
+| **Lua** | 用户自定义分帧脚本 | `script_path`（Lua 脚本路径） |
+
+### 解码器（Decoder）
+
+将帧数据解析为可展示的内容。
+
+| 解码器 | 输出类型 | 配置参数 |
+|--------|----------|----------|
+| **Text** | 文本 | `encoding`（UTF-8 / Latin1 / ASCII） |
+| **Hex** | 十六进制 | `uppercase`、`separator`、`bytes_per_group`、`endian` |
+| **Plot** | 波形数据 | `sample_type` (i8–f64)、`endian`、`channels` (1–64)、`format` (Interleaved / Block / XY) |
+| **MixedTextPlot** | 混合文本 + 波形 | `encoding` |
+| **Lua** | 自定义 | `script_path`（Lua 脚本路径） |
+
+**Plot 采样格式：**
+
+| 格式 | 说明 | 字节排列 |
+|------|------|----------|
+| **Interleaved** | 多通道交叉排列 | `[ch0_s0, ch1_s0, ch2_s0, ch0_s1, ch1_s1, …]` |
+| **Block** | 按通道分块排列 | `[ch0_s0, ch0_s1, …, ch1_s0, ch1_s1, …]` |
+| **XY** | 2 通道交替 x/y | `[x0, y0, x1, y1, …]` |
+
+支持的采样类型：`i8`、`u8`、`i16`、`u16`、`i32`、`u32`、`i64`、`u64`、`f32`、`f64`
+
+### 视图
+
+- **文本视图** — 带时间戳、方向标记 (`[IN]`/`[OUT]`)、管线标签的格式化文本流。支持搜索（`Ctrl+F`）、大小写匹配、匹配计数和高亮。
+- **十六进制视图** — hex dump 与 ASCII 侧栏并排展示，可按分组和大小端解析多字节数值。
+- **波形视图** — 基于 [egui_plot](https://github.com/emilk/egui/tree/master/crates/egui_plot) 的实时波形。支持自动缩放、框选缩放、坐标轴锁定、跟随最新数据、浮动窗口、通道图例。
+
+### 会话管理
+
+- **多会话并发** — 标签页切换，每个 Session 独立配置
+- **连接控制** — Connect / Disconnect / Reconnect，支持断线自动重连
+- **运行时重配置** — 修改分帧器/解码器参数无需断开连接
+- **数据发送** — Text 模式（UTF-8，可选换行符）和 Hex 模式（十六进制字节）。支持 `None` / `LF` / `CR` / `CRLF` 四种行尾
+- **环形缓冲** — 默认 10,000 条历史记录，可配置 100–1,000,000
+- **日志到文件** — 每行数据实时写入，1KB 缓冲 + 后台线程，不阻塞 UI
+- **搜索** — `Ctrl+F` 呼出搜索栏，大小写敏感切换，F3/Shift+F3 前后跳转
+
+### Lua 脚本扩展
+
+内置 LuaJIT 运行时：
+
+- **自定义分帧器** — 实现 `feed(bytes)`、`flush()`、`reset()`、`pending_len()` 四个函数
+- **自定义解码器** — 实现 `decode(frame)` 函数，返回 text/hex/plot/binary 四种类型
+- **会话 API** — `pipeview.open()` 创建 Session、`session:on_data()` 事件回调、`session:send()` 发送数据
+- **工具函数** — `pipeview.list_ports()`、`pipeview.sleep(ms)`、`pipeview.poll(limit)`、`pipeview.log(msg)`
+
+### 快捷键
+
+| 快捷键 | 操作 |
+|--------|------|
+| `Ctrl+N` | 新建会话 |
+| `Ctrl+E` | 编辑当前会话 |
+| `Ctrl+W` | 删除当前会话 |
+| `Ctrl+F5` | 切换连接 |
+| `Ctrl+T` / `Ctrl+H` / `Ctrl+P` | 切换到文本 / 十六进制 / 波形视图 |
+| `Ctrl+Tab` / `Ctrl+Shift+Tab` | 下一个 / 上一个标签页 |
+| `Ctrl+L` | 清空输出 |
+| `Ctrl+F` | 搜索 |
+| `F3` / `Shift+F3` | 上一个 / 下一个匹配 |
+| `Ctrl+,` | UI 设置 |
+| `Esc` | 关闭浮层 |
+
+---
+
+## 快速开始
+
+### 前置条件
+
+| 平台 | 依赖 |
+|------|------|
+| **Linux** | `libudev-dev`（`apt install libudev-dev`） |
+| **macOS** | 无需额外依赖 |
+| **Windows** | 无需额外依赖 |
+| **所有平台** | Rust ≥ 1.85、C 编译器（GCC / Clang / MSVC） |
+
+### 构建与运行
+
+```bash
+# 克隆项目
+git clone https://github.com/your-org/pipeview.git
+cd pipeview
+
+# 编译运行
+cargo run -p pipeview-gui
+
+# 运行测试
+cargo test --workspace           # ~308 个测试
+cargo clippy --workspace --all-targets -- -D warnings
+```
+
+### 发布构建
+
+```bash
+cargo build -p pipeview-gui --release
+# 二进制位于 target/release/pipeview-gui (Linux/macOS)
+# 或 target/release/pipeview-gui.exe (Windows)
+```
+
+---
+
+## 完整示例：无人机遥测解析
+
+以 Betaflight/INAV 飞控遥测为例，数据格式为：
+
+```
+AHRS q:1.0000,0.0998,0.0499,0.0200|YPR:8.87,4.44,2.96|Gyro:14.78,8.87,5.92|RC:1559,1544,1500,1519|M:1612,1588,1603,1597|L:0 F:1 C:0
+```
+
+### 步骤 1：启动测试数据源
+
+```bash
+python tools/test_drone.py --rate 10 --port 8091
+```
+
+输出：
+
+```
+Listening on 127.0.0.1:8091, waiting for connections...
+```
+
+### 步骤 2：配置 Session
+
+在 pipeview-gui 中创建 Session：
+
+| 配置项 | 值 |
+|--------|-----|
+| Transport | `TCP 127.0.0.1:8091` |
+| Pipeline 1 | Framer: `Line` → Decoder: `Lua` → 选择 `examples/drone_text.lua` |
+| Pipeline 2 | Framer: `Line` → Decoder: `Lua` → 选择 `examples/drone_plot.lua` |
+
+### 步骤 3：查看结果
+
+- **文本视图** — 显示格式化的传感器数据
+- **波形视图** — 显示 Gyro 三轴实时曲线 (gz/gy/gx)
+
+`examples/drone_plot.lua` 的核心逻辑：
+
+```lua
+return {
+    decode = function(frame)
+        local gz, gy, gx = frame:match("Gyro:([%d%.%-]+),([%d%.%-]+),([%d%.%-]+)")
+        return {
+            kind = "plot",
+            channels = { { tonumber(gz) }, { tonumber(gy) }, { tonumber(gx) } },
+            sample_type = "F64",
+            format = "Block",
+        }
+    end,
+}
+```
+
+---
+
+## Lua 脚本开发指南
+
+### 分帧器 API
+
+分帧器将原始字节流切分为帧，Lua 脚本必须返回包含以下函数的 table：
+
+```lua
+return {
+    -- 输入新到达的字节，返回帧数组（Lua strings）
+    feed = function(bytes)
+        -- bytes: Lua string（原始字节）
+        -- 返回: { frame1, frame2, ... } 或 nil
+    end,
+
+    -- 刷新缓冲区中残留的数据
+    flush = function()
+        -- 返回: 最后一帧（Lua string）或 nil
+    end,
+
+    -- 重置内部状态
+    reset = function()
+    end,
+
+    -- 返回缓冲区中待处理的字节数
+    pending_len = function()
+        -- 返回: number
+    end,
+}
+```
+
+参考实现：`tests/lua_line_framer.lua`（按 `\n` 分割的行分帧器）
+
+### 解码器 API
+
+解码器将帧解析为结构化数据，Lua 脚本必须返回包含 `decode` 函数的 table：
+
+```lua
+return {
+    decode = function(frame)
+        -- frame: Lua string（来自分帧器的一帧）
+        -- 返回 nil → 跳过此帧
+        -- 返回 string → 自动视为 Text
+        -- 返回 table → 必须包含 kind 字段
+    end,
+}
+```
+
+**返回值格式：**
+
+| `kind` | 必需字段 | 可选字段 | 用途 |
+|--------|----------|----------|------|
+| `"text"` | `data: string` | — | 文本视图 |
+| `"hex"` | `data: string` | — | 十六进制视图 |
+| `"binary"` | `data: string` | — | 原始二进制 |
+| `"plot"` | `channels: {{number,…},…}` | `sample_type`、`format` | 波形视图 |
+
+**Plot 返回值示例：**
+
+```lua
+return {
+    kind = "plot",
+    channels = {
+        { 1.0, 2.0, 3.0 },  -- channel 0
+        { 4.0, 5.0, 6.0 },  -- channel 1
+    },
+    sample_type = "F64",     -- 默认 F64，可选 I8/U8/I16/U16/I32/U32/I64/U64/F32
+    format = "Block",        -- 默认 Interleaved，可选 Block/XY
+}
+```
+
+更多示例见 `examples/` 目录。
+
+---
+
+## 架构
+
+```
+┌──────────────────────────────────────────────────┐
+│  pipeview-gui (egui)       pipeview-tui (ratatui) │
+├──────────────────────────────────────────────────┤
+│  pipeview-client                                  │
+│  SessionManager · Session · Config · History     │
+│  Lua Runtime (mlua / LuaJIT)                     │
+├──────────────────────────────────────────────────┤
+│  pipeview-core                                    │
+│  Transport ──▶ Frame ──▶ Protocol ──▶ Pipeline  │
+└──────────────────────────────────────────────────┘
+```
+
+| Crate | 类型 | 职责 |
+|-------|------|------|
+| `pipeview-core` | library | 传输层（Serial/TCP/UDP）、分帧器（Line/Fixed/Length/COBS/Mixed/Lua）、协议解码器（Text/Hex/Plot）、MultiPipeline |
+| `pipeview-client` | library | Session 生命周期管理、SessionManager、事件广播（tokio broadcast）、RingBuffer 历史、Lua 运行时及会话 API |
+| `pipeview-gui` | binary | egui 桌面应用，包含 sidebar/config/console/text/hex/plot 面板、键盘快捷键、字体管理、性能分析 |
+| `pipeview-tui` | binary | ratatui 终端应用（功能未对齐 GUI，仍在开发中） |
+
+**依赖方向：** `core ← client ← {gui, tui}`
+
+**数据流：**
+
+```
+[Transport] → read bytes → [MultiPipeline]
+    → Pipeline 1: Framer → Decoder → DecodedEntry → broadcast → GUI buffers
+    → Pipeline 2: Framer → Decoder → DecodedEntry → broadcast → GUI buffers
+    → ...
+```
+
+每条管线独立分帧、解码，互不干扰。只有成功解码的管线产生输出。
+
+---
+
+## 配置与持久化
+
+GUI 状态自动保存，路径遵循各平台规范：
+
+| 平台 | 路径 |
+|------|------|
+| Linux | `$XDG_CONFIG_HOME/pipeview/gui-state.json` 或 `~/.config/pipeview/gui-state.json` |
+| macOS | `~/Library/Application Support/pipeview/gui-state.json` |
+| Windows | `%APPDATA%\pipeview\gui-state.json` |
+
+持久化的内容包括：Session 配置（传输参数、管线设置）、日志开关及路径、活动标签页、显示选项。
+
+日志文件默认保存在配置目录的 `logs/` 子目录下，文件命名格式为 `session_{id}_{timestamp}.log`。
+
+---
+
+## 开发工具
+
+### 测试数据生成器
+
+```bash
+# Plot 波形测试数据
+python tools/test_plot.py --wire-format mixed --host 127.0.0.1 --port 8091
+python tools/test_plot.py --wire-format mixed --format xy --channels 2
+python tools/test_plot.py --wire-format raw --channels 2 --framelen 256
+
+# 无人机遥测测试数据
+python tools/test_drone.py --rate 10 --port 8092
+```
+
+### 性能分析
+
+```bash
+RUST_LOG=pipeview_gui::perf=info XSERIAL_GUI_PROFILE=1 cargo run -p pipeview-gui
+XSERIAL_GUI_PROFILE_INTERVAL_MS=500 cargo run -p pipeview-gui
+```
+
+输出每帧的耗时、事件 drain 耗时、text/hex/plot 渲染耗时、plot 点数统计。
+
+### 日志
+
+```bash
+RUST_LOG=info cargo run -p pipeview-gui          # 应用日志
+RUST_LOG=pipeview_gui=debug cargo run -p pipeview-gui  # 详细日志
+```
+
+使用 `tracing-subscriber` + `RUST_LOG` 环境变量控制。
+
+### 项目结构
+
+```
+crates/
+  pipeview-core/        # 传输、分帧、协议
+  pipeview-client/      # 会话管理、Lua 运行时
+  pipeview-gui/         # egui 桌面应用
+  pipeview-tui/         # ratatui 终端应用
+examples/              # Lua 脚本示例
+  drone_plot.lua       # 飞控遥测波形解码器
+  drone_text.lua       # 飞控遥测文本解码器
+tests/                 # Lua 测试 fixture
+tools/                 # 开发辅助工具
+  test_plot.py         # 波形测试数据生成器
+  test_drone.py        # 飞控测试数据生成器
+  test_plot_serial.c   # C 串口波形测试客户端
+  test_text_serial.c   # C 串口文本测试客户端
+  xs_mixed_plot.h      # MixedTextPlot 协议参考头文件
+```
+
+---
+
+## 技术栈
+
+- **运行时**：tokio (multi-thread)
+- **串口**：`tokio-serial` + `serialport`
+- **GUI**：egui + egui_plot
+- **Lua**：mlua 0.11, LuaJIT (vendored 编译), async/serde/send
+- **事件分发**：`tokio::sync::broadcast`（多订阅者）
+- **零 feature flags**、零 build script、零条件编译
+
+## License
+
+MIT

README_en.md

@@ -0,0 +1,378 @@
+# pipeview
+
+**Cross-platform serial / TCP / UDP data inspection tool** with configurable framing, protocol decoding, multi-session management, and real-time waveform plotting — all in a single binary.
+
+Built with Rust + [egui](https://github.com/emilk/egui), scriptable with Lua.
+
+[中文文档](README.md)
+
+---
+
+## Table of Contents
+
+- [Features](#features)
+- [Quick Start](#quick-start)
+- [Walkthrough: Drone Telemetry](#walkthrough-drone-telemetry)
+- [Lua Scripting Guide](#lua-scripting-guide)
+- [Architecture](#architecture)
+- [Configuration & Persistence](#configuration--persistence)
+- [Development Tools](#development-tools)
+- [Tech Stack](#tech-stack)
+- [License](#license)
+
+---
+
+## Features
+
+### Transport
+
+| Type | Description | Options |
+|------|-------------|---------|
+| **Serial** | Serial port communication | Port name, baud rate (300–12M), data bits (5/6/7/8), parity (None/Odd/Even), stop bits (1/2), flow control (None/Software/Hardware), DTR/RTS control |
+| **TCP** | TCP client | Target address `host:port` |
+| **UDP** | UDP communication | Bind address `host:port`, optional remote address |
+
+### Framers
+
+Framers split raw byte streams into discrete frames. Each session supports **multiple independent pipelines** — the same byte stream feeds multiple framer→decoder chains in parallel.
+
+| Framer | Description | Parameters |
+|--------|-------------|------------|
+| **Line** | Split by `\n` | `strip_cr`, `max_line_len` |
+| **Fixed** | Fixed-length frames | `frame_len` |
+| **Length** | Length-prefixed protocol | `len_bytes` (1/2/4/8), `endian`, `length_includes_self`, `max_payload` |
+| **COBS** | [Consistent Overhead Byte Stuffing](https://en.wikipedia.org/wiki/Consistent_Overhead_Byte_Stuffing) | `max_frame` |
+| **MixedTextPlot** | Hybrid text lines + COBS-encoded plot frames on one stream | `strip_cr`, `max_line_len`, `max_plot_frame` |
+| **Lua** | User-defined framer script | `script_path` |
+
+### Decoders
+
+Decoders parse framed data into displayable content.
+
+| Decoder | Output | Parameters |
+|---------|--------|------------|
+| **Text** | Text | `encoding` (UTF-8 / Latin1 / ASCII) |
+| **Hex** | Hexadecimal | `uppercase`, `separator`, `bytes_per_group`, `endian` |
+| **Plot** | Waveform | `sample_type` (i8–f64), `endian`, `channels` (1–64), `format` (Interleaved / Block / XY) |
+| **MixedTextPlot** | Hybrid text + waveform | `encoding` |
+| **Lua** | Custom | `script_path` |
+
+**Plot sample formats:**
+
+| Format | Description | Byte layout |
+|--------|-------------|-------------|
+| **Interleaved** | Channels interleaved | `[ch0_s0, ch1_s0, ch2_s0, ch0_s1, ch1_s1, …]` |
+| **Block** | Channel-contiguous blocks | `[ch0_s0, ch0_s1, …, ch1_s0, ch1_s1, …]` |
+| **XY** | 2-channel x/y pairs | `[x0, y0, x1, y1, …]` |
+
+Supported sample types: `i8`, `u8`, `i16`, `u16`, `i32`, `u32`, `i64`, `u64`, `f32`, `f64`
+
+### Views
+
+- **Text View** — formatted text with timestamps, direction markers (`[IN]`/`[OUT]`), and pipeline labels. Built-in search (`Ctrl+F`) with case-sensitive toggle, match counter, and highlighting.
+- **Hex View** — hex dump alongside ASCII sidebar. Configurable byte grouping and endianness.
+- **Plot View** — real-time waveforms via [egui_plot](https://github.com/emilk/egui/tree/master/crates/egui_plot). Auto-fit, box zoom, axis locking, follow-latest, detached window, channel legend.
+
+### Sessions
+
+- **Multi-session** — tabbed interface, each session independently configured
+- **Connection control** — Connect / Disconnect / Reconnect with auto-reconnect on drop
+- **Live reconfiguration** — change framer/decoder settings without restarting
+- **Data sending** — Text mode (UTF-8, configurable line endings) and Hex mode (raw bytes). Four line ending options: None / LF / CR / CRLF
+- **Ring buffer** — default 10,000 entries, configurable 100–1,000,000
+- **Log to file** — background writer thread with 1 KB buffer, non-blocking
+- **Search** — `Ctrl+F` search bar, case-sensitive toggle, F3/Shift+F3 navigation
+
+### Lua Scripting
+
+Built-in LuaJIT runtime:
+
+- **Custom framers** — implement `feed(bytes)`, `flush()`, `reset()`, `pending_len()`
+- **Custom decoders** — implement `decode(frame)`, return text/hex/plot/binary
+- **Session API** — `pipeview.open()` to create sessions, `session:on_data()` for event callbacks, `session:send()` to transmit data
+- **Utilities** — `pipeview.list_ports()`, `pipeview.sleep(ms)`, `pipeview.poll(limit)`, `pipeview.log(msg)`
+
+### Keyboard Shortcuts
+
+| Shortcut | Action |
+|----------|--------|
+| `Ctrl+N` | New session |
+| `Ctrl+E` | Edit current session |
+| `Ctrl+W` | Delete current session |
+| `Ctrl+F5` | Toggle connection |
+| `Ctrl+T` / `Ctrl+H` / `Ctrl+P` | Switch to Text / Hex / Plot view |
+| `Ctrl+Tab` / `Ctrl+Shift+Tab` | Next / Previous tab |
+| `Ctrl+L` | Clear output |
+| `Ctrl+F` | Search |
+| `F3` / `Shift+F3` | Next / Previous match |
+| `Ctrl+,` | UI settings |
+| `Esc` | Close overlay |
+
+---
+
+## Quick Start
+
+### Prerequisites
+
+| Platform | Dependencies |
+|----------|-------------|
+| **Linux** | `libudev-dev` (`apt install libudev-dev`) |
+| **macOS** | None |
+| **Windows** | None |
+| **All** | Rust ≥ 1.85, C compiler (GCC / Clang / MSVC) |
+
+### Build & Run
+
+```bash
+git clone https://github.com/your-org/pipeview.git
+cd pipeview
+
+cargo run -p pipeview-gui
+
+# Run tests
+cargo test --workspace           # ~308 tests
+cargo clippy --workspace --all-targets -- -D warnings
+```
+
+### Release Build
+
+```bash
+cargo build -p pipeview-gui --release
+# Binary: target/release/pipeview-gui (Linux/macOS)
+#         target/release/pipeview-gui.exe (Windows)
+```
+
+---
+
+## Walkthrough: Drone Telemetry
+
+Parse Betaflight/INAV flight controller telemetry in the format:
+
+```
+AHRS q:1.0000,0.0998,0.0499,0.0200|YPR:8.87,4.44,2.96|Gyro:14.78,8.87,5.92|RC:1559,1544,1500,1519|M:1612,1588,1603,1597|L:0 F:1 C:0
+```
+
+### Step 1: Start the data source
+
+```bash
+python tools/test_drone.py --rate 10 --port 8091
+```
+
+### Step 2: Configure the session
+
+In pipeview-gui, create a session with two pipelines:
+
+| Setting | Value |
+|---------|-------|
+| Transport | `TCP 127.0.0.1:8091` |
+| Pipeline 1 | Framer: `Line` → Decoder: `Lua` → `examples/drone_text.lua` |
+| Pipeline 2 | Framer: `Line` → Decoder: `Lua` → `examples/drone_plot.lua` |
+
+### Step 3: View the results
+
+- **Text View** — formatted sensor readouts
+- **Plot View** — real-time gyroscope curves (gz/gy/gx)
+
+The decoder in `examples/drone_plot.lua`:
+
+```lua
+return {
+    decode = function(frame)
+        local gz, gy, gx = frame:match("Gyro:([%d%.%-]+),([%d%.%-]+),([%d%.%-]+)")
+        return {
+            kind = "plot",
+            channels = { { tonumber(gz) }, { tonumber(gy) }, { tonumber(gx) } },
+            sample_type = "F64",
+            format = "Block",
+        }
+    end,
+}
+```
+
+---
+
+## Lua Scripting Guide
+
+### Framer API
+
+A Lua framer splits raw bytes into frames. The script must return a table with these functions:
+
+```lua
+return {
+    feed = function(bytes)
+        -- bytes: Lua string (raw bytes)
+        -- Returns: { frame1, frame2, ... } or nil
+    end,
+
+    flush = function()
+        -- Returns: last buffered frame (string) or nil
+    end,
+
+    reset = function()
+    end,
+
+    pending_len = function()
+        -- Returns: number of bytes pending in buffer
+    end,
+}
+```
+
+Reference: `tests/lua_line_framer.lua` (line-based framer splitting on `\n`).
+
+### Decoder API
+
+A Lua decoder parses a frame into structured data. The script must return a table with a `decode` function:
+
+```lua
+return {
+    decode = function(frame)
+        -- frame: Lua string (one frame from the framer)
+        -- Returns nil → skip this frame
+        -- Returns string → treated as Text
+        -- Returns table → must contain "kind" field
+    end,
+}
+```
+
+**Return value formats:**
+
+| `kind` | Required | Optional | Purpose |
+|--------|----------|----------|---------|
+| `"text"` | `data: string` | — | Text view |
+| `"hex"` | `data: string` | — | Hex view |
+| `"binary"` | `data: string` | — | Raw bytes |
+| `"plot"` | `channels: {{number,…},…}` | `sample_type`, `format` | Plot view |
+
+**Plot return value example:**
+
+```lua
+return {
+    kind = "plot",
+    channels = {
+        { 1.0, 2.0, 3.0 },  -- channel 0
+        { 4.0, 5.0, 6.0 },  -- channel 1
+    },
+    sample_type = "F64",    -- default F64; also I8/U8/I16/U32/U64/F32
+    format = "Block",       -- default Interleaved; also Block/XY
+}
+```
+
+More examples in `examples/`.
+
+---
+
+## Architecture
+
+```
+┌──────────────────────────────────────────────────┐
+│  pipeview-gui (egui)       pipeview-tui (ratatui) │
+├──────────────────────────────────────────────────┤
+│  pipeview-client                                  │
+│  SessionManager · Session · Config · History     │
+│  Lua Runtime (mlua / LuaJIT)                     │
+├──────────────────────────────────────────────────┤
+│  pipeview-core                                    │
+│  Transport ──▶ Frame ──▶ Protocol ──▶ Pipeline  │
+└──────────────────────────────────────────────────┘
+```
+
+| Crate | Type | Purpose |
+|-------|------|---------|
+| `pipeview-core` | library | Transport (Serial/TCP/UDP), framers (Line/Fixed/Length/COBS/Mixed/Lua), decoders (Text/Hex/Plot), MultiPipeline |
+| `pipeview-client` | library | Session lifecycle, SessionManager, event broadcast (tokio broadcast), RingBuffer history, Lua runtime & session API |
+| `pipeview-gui` | binary | egui desktop app: sidebar, config, console, text/hex/plot panels, keyboard shortcuts, font management, profiling |
+| `pipeview-tui` | binary | ratatui terminal app (feature-incomplete, under development) |
+
+**Dependency flow:** `core ← client ← {gui, tui}`
+
+**Data flow:**
+
+```
+[Transport] → read bytes → [MultiPipeline]
+    → Pipeline 1: Framer → Decoder → DecodedEntry → broadcast → GUI buffers
+    → Pipeline 2: Framer → Decoder → DecodedEntry → broadcast → GUI buffers
+    → ...
+```
+
+Each pipeline frames and decodes independently. Only successful decodes produce output.
+
+---
+
+## Configuration & Persistence
+
+GUI state is saved automatically to platform-standard locations:
+
+| Platform | Path |
+|----------|------|
+| Linux | `$XDG_CONFIG_HOME/pipeview/gui-state.json` or `~/.config/pipeview/gui-state.json` |
+| macOS | `~/Library/Application Support/pipeview/gui-state.json` |
+| Windows | `%APPDATA%\pipeview\gui-state.json` |
+
+Persisted data includes: session configurations (transport, pipelines), log settings, active tab, and display options.
+
+Log files are written to `logs/` under the config directory, named `session_{id}_{timestamp}.log`.
+
+---
+
+## Development Tools
+
+### Test Data Generators
+
+```bash
+# Plot waveform test data
+python tools/test_plot.py --wire-format mixed --host 127.0.0.1 --port 8091
+python tools/test_plot.py --wire-format mixed --format xy --channels 2
+python tools/test_plot.py --wire-format raw --channels 2 --framelen 256
+
+# Drone telemetry test data
+python tools/test_drone.py --rate 10 --port 8092
+```
+
+### Profiling
+
+```bash
+RUST_LOG=pipeview_gui::perf=info XSERIAL_GUI_PROFILE=1 cargo run -p pipeview-gui
+XSERIAL_GUI_PROFILE_INTERVAL_MS=500 cargo run -p pipeview-gui
+```
+
+### Tracing
+
+```bash
+RUST_LOG=info cargo run -p pipeview-gui
+RUST_LOG=pipeview_gui=debug cargo run -p pipeview-gui
+```
+
+### Project Structure
+
+```
+crates/
+  pipeview-core/        # Transport, framing, protocol
+  pipeview-client/      # Session management, Lua runtime
+  pipeview-gui/         # egui desktop application
+  pipeview-tui/         # ratatui terminal application
+examples/              # Lua script examples
+  drone_plot.lua       # Drone telemetry plot decoder
+  drone_text.lua       # Drone telemetry text decoder
+tests/                 # Lua test fixtures
+tools/                 # Development utilities
+  test_plot.py         # Waveform test data generator
+  test_drone.py        # Drone test data generator
+  test_plot_serial.c   # C serial plot test client
+  test_text_serial.c   # C serial text test client
+  xs_mixed_plot.h      # MixedTextPlot protocol reference
+```
+
+---
+
+## Tech Stack
+
+- **Runtime**: tokio (multi-threaded)
+- **Serial**: `tokio-serial` + `serialport`
+- **GUI**: egui + egui_plot
+- **Lua**: mlua 0.11, LuaJIT (vendored), async/serde/send
+- **Events**: `tokio::sync::broadcast` (multi-subscriber)
+- **Zero feature flags**, zero build scripts, zero conditional compilation
+
+## License
+
+MIT

crates/pipeview-client/Cargo.toml

@@ -1,10 +1,10 @@
 [package]
-name = "xserial-client"
+name = "pipeview-client"
 version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-xserial-core = { path = "../xserial-core" }
+pipeview-core = { path = "../pipeview-core" }
 tokio = { workspace = true, features = ["sync", "time"] }
 tracing = { workspace = true }
 serde = { workspace = true }

crates/pipeview-client/src/cmd.rs

@@ -8,4 +8,6 @@ pub enum SessionCmd {
     SetAutoReconnect(bool),
     Close,
     Reconfigure(SessionConfig),
+    SetDtr(bool),
+    SetRts(bool),
 }

crates/pipeview-client/src/config.rs

@@ -1,5 +1,4 @@
-use serde::{Deserialize, Serialize};
+use pipeview_core::frame::{
-use xserial_core::frame::{
     Endian, Framer,
     cobs::CobsFramer,
     fixed::FixedLengthFramer,
@@ -7,14 +6,18 @@ use xserial_core::frame::{
     line::{LineConfig, LineFramer},
     mixed::{MixedTextPlotConfig as MixedFramerConfig, MixedTextPlotFramer},
 };
-use xserial_core::protocol::{
+use pipeview_core::protocol::{
     ProtocolDecoder,
     hex::{HexConfig, HexDecoder},
     mixed::{MixedTextPlotConfig as MixedDecoderConfig, MixedTextPlotDecoder},
     plot::{PlotConfig, PlotDecoder, PlotFormat, SampleType},
     text::{TextDecoder, TextEncoding},
 };
-use xserial_core::transport::TransportConfig;
+use pipeview_core::transport::TransportConfig;
+use serde::{Deserialize, Serialize};
+
+use crate::error::Result;
+use crate::lua::codec::{LuaDecoder, LuaFramer};
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum FramerConfig {
@@ -49,6 +52,9 @@ pub enum FramerConfig {
         #[serde(default = "default_max_frame")]
         max_plot_frame: usize,
     },
+    Lua {
+        script_path: String,
+    },
 }
 
 fn default_true() -> bool {
@@ -68,15 +74,15 @@ fn default_max_frame() -> usize {
 }
 
 impl FramerConfig {
-    pub fn build(self) -> Box<dyn Framer> {
+    pub fn build(self) -> Result<Box<dyn Framer>> {
-        match self {
+        Ok(match self {
             FramerConfig::Line {
                 strip_cr,
                 max_line_len,
             } => Box::new(LineFramer::new(LineConfig {
                 strip_cr,
                 max_line_len,
-            })),
+            })) as Box<dyn Framer>,
             FramerConfig::Fixed { frame_len } => Box::new(FixedLengthFramer::new(frame_len)),
             FramerConfig::Length {
                 len_bytes,
@@ -99,7 +105,10 @@ impl FramerConfig {
                 max_line_len,
                 max_plot_frame,
             })),
+            FramerConfig::Lua { script_path } => {
+                Box::new(LuaFramer::from_script_path(script_path)?)
             }
+        })
     }
 }
 
@@ -132,6 +141,9 @@ pub enum DecoderConfig {
         #[serde(default)]
         encoding: TextEncoding,
     },
+    Lua {
+        script_path: String,
+    },
 }
 
 fn default_sep() -> String {
@@ -142,9 +154,11 @@ fn default_one() -> usize {
 }
 
 impl DecoderConfig {
-    pub fn build(self) -> Box<dyn ProtocolDecoder> {
+    pub fn build(self) -> Result<Box<dyn ProtocolDecoder>> {
-        match self {
+        Ok(match self {
-            DecoderConfig::Text { encoding } => Box::new(TextDecoder::new(encoding)),
+            DecoderConfig::Text { encoding } => {
+                Box::new(TextDecoder::new(encoding)) as Box<dyn ProtocolDecoder>
+            }
             DecoderConfig::Hex {
                 uppercase,
                 separator,
@@ -170,7 +184,10 @@ impl DecoderConfig {
             DecoderConfig::MixedTextPlot { encoding } => {
                 Box::new(MixedTextPlotDecoder::new(MixedDecoderConfig { encoding }))
             }
+            DecoderConfig::Lua { script_path } => {
+                Box::new(LuaDecoder::from_script_path(script_path)?)
             }
+        })
     }
 }
 
@@ -212,10 +229,10 @@ impl Default for SessionConfig {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use xserial_core::protocol::Endian;
+    use pipeview_core::protocol::Endian;
-    use xserial_core::protocol::plot::{PlotFormat, SampleType};
+    use pipeview_core::protocol::plot::{PlotFormat, SampleType};
-    use xserial_core::protocol::text::TextEncoding;
+    use pipeview_core::protocol::text::TextEncoding;
-    use xserial_core::transport::TransportConfig;
+    use pipeview_core::transport::TransportConfig;
 
     #[test]
     fn framer_line_serde_roundtrip() {
@@ -285,6 +302,16 @@ mod tests {
         }
     }
 
+    #[test]
+    fn framer_lua_serde() {
+        let cfg: FramerConfig =
+            serde_json::from_str(r#"{"Lua":{"script_path":"/tmp/framer.lua"}}"#).unwrap();
+        match cfg {
+            FramerConfig::Lua { script_path } => assert_eq!(script_path, "/tmp/framer.lua"),
+            _ => panic!("expected Lua"),
+        }
+    }
+
     #[test]
     fn decoder_text_serde() {
         let cfg: DecoderConfig = serde_json::from_str(r#"{"Text":{"encoding":"Latin1"}}"#).unwrap();
@@ -345,6 +372,16 @@ mod tests {
         }
     }
 
+    #[test]
+    fn decoder_lua_serde() {
+        let cfg: DecoderConfig =
+            serde_json::from_str(r#"{"Lua":{"script_path":"/tmp/decoder.lua"}}"#).unwrap();
+        match cfg {
+            DecoderConfig::Lua { script_path } => assert_eq!(script_path, "/tmp/decoder.lua"),
+            _ => panic!("expected Lua"),
+        }
+    }
+
     #[test]
     fn session_config_full_roundtrip() {
         let json = r#"{
@@ -388,7 +425,7 @@ mod tests {
                 max_plot_frame: 1024,
             },
         ] {
-            let f = cfg.build();
+            let f = cfg.build().unwrap();
             assert_eq!(f.pending_len(), 0);
         }
     }
@@ -400,6 +437,7 @@ mod tests {
                 encoding: TextEncoding::Utf8
             }
             .build()
+            .unwrap()
             .name(),
             "Text"
         );
@@ -411,6 +449,7 @@ mod tests {
                 endian: Endian::Big
             }
             .build()
+            .unwrap()
             .name(),
             "Hex"
         );
@@ -422,6 +461,7 @@ mod tests {
                 format: PlotFormat::XY
             }
             .build()
+            .unwrap()
             .name(),
             "Plot"
         );
@@ -430,6 +470,7 @@ mod tests {
                 encoding: TextEncoding::Utf8
             }
             .build()
+            .unwrap()
             .name(),
             "MixedTextPlot"
         );

crates/pipeview-client/src/event.rs

@@ -1,4 +1,4 @@
-use xserial_core::protocol::DecodedData;
+use pipeview_core::protocol::DecodedData;
 
 #[derive(Debug, Clone)]
 pub struct DecodedEntry {

crates/pipeview-client/src/history.rs

@@ -28,6 +28,9 @@ impl<T> RingBuffer<T> {
     pub fn iter(&self) -> impl Iterator<Item = &T> {
         self.buf.iter()
     }
+    pub fn get(&self, index: usize) -> Option<&T> {
+        self.buf.get(index)
+    }
     pub fn clear(&mut self) {
         self.buf.clear();
     }

crates/pipeview-client/src/lua/codec.rs

@@ -0,0 +1,404 @@
+use std::fs;
+use std::sync::Mutex;
+
+use mlua::{Function, Lua, RegistryKey, Table, Value};
+use pipeview_core::frame::Framer;
+use pipeview_core::protocol::plot::{PlotFormat, PlotFrame, SampleType};
+use pipeview_core::protocol::{DecodedData, ProtocolDecoder};
+use tracing::warn;
+
+use crate::error::{Error, Result};
+
+pub struct LuaFramer {
+    lua: Lua,
+    feed: RegistryKey,
+    flush: RegistryKey,
+    reset: RegistryKey,
+    pending_len: RegistryKey,
+    script_path: String,
+}
+
+impl LuaFramer {
+    pub fn from_script_path(script_path: impl Into<String>) -> Result<Self> {
+        let script_path = script_path.into();
+        let lua = Lua::new();
+        let table = load_script_table(&lua, &script_path)?;
+        let feed = registry_function(&lua, &table, "feed", &script_path)?;
+        let flush = registry_function(&lua, &table, "flush", &script_path)?;
+        let reset = registry_function(&lua, &table, "reset", &script_path)?;
+        let pending_len = registry_function(&lua, &table, "pending_len", &script_path)?;
+
+        Ok(Self {
+            lua,
+            feed,
+            flush,
+            reset,
+            pending_len,
+            script_path,
+        })
+    }
+}
+
+impl Framer for LuaFramer {
+    fn feed(&mut self, data: &[u8]) -> Vec<Vec<u8>> {
+        let result = (|| -> mlua::Result<Vec<Vec<u8>>> {
+            let function: Function = self.lua.registry_value(&self.feed)?;
+            let bytes = self.lua.create_string(data)?;
+            frames_from_value(function.call::<Value>(bytes)?)
+        })();
+
+        match result {
+            Ok(frames) => frames,
+            Err(err) => {
+                warn!(script = %self.script_path, error = %err, "lua framer feed failed");
+                Vec::new()
+            }
+        }
+    }
+
+    fn flush(&mut self) -> Option<Vec<u8>> {
+        let result = (|| -> mlua::Result<Option<Vec<u8>>> {
+            let function: Function = self.lua.registry_value(&self.flush)?;
+            optional_bytes_from_value(function.call::<Value>(())?)
+        })();
+
+        match result {
+            Ok(frame) => frame,
+            Err(err) => {
+                warn!(script = %self.script_path, error = %err, "lua framer flush failed");
+                None
+            }
+        }
+    }
+
+    fn reset(&mut self) {
+        let result = (|| -> mlua::Result<()> {
+            let function: Function = self.lua.registry_value(&self.reset)?;
+            function.call::<()>(())
+        })();
+
+        if let Err(err) = result {
+            warn!(script = %self.script_path, error = %err, "lua framer reset failed");
+        }
+    }
+
+    fn pending_len(&self) -> usize {
+        let result = (|| -> mlua::Result<usize> {
+            let function: Function = self.lua.registry_value(&self.pending_len)?;
+            function.call::<usize>(())
+        })();
+
+        match result {
+            Ok(len) => len,
+            Err(err) => {
+                warn!(script = %self.script_path, error = %err, "lua framer pending_len failed");
+                0
+            }
+        }
+    }
+}
+
+pub struct LuaDecoder {
+    lua: Lua,
+    decode: RegistryKey,
+    script_path: String,
+    call_lock: Mutex<()>,
+}
+
+impl LuaDecoder {
+    pub fn from_script_path(script_path: impl Into<String>) -> Result<Self> {
+        let script_path = script_path.into();
+        let lua = Lua::new();
+        let table = load_script_table(&lua, &script_path)?;
+        let decode = registry_function(&lua, &table, "decode", &script_path)?;
+
+        Ok(Self {
+            lua,
+            decode,
+            script_path,
+            call_lock: Mutex::new(()),
+        })
+    }
+}
+
+impl ProtocolDecoder for LuaDecoder {
+    fn name(&self) -> &str {
+        "Lua"
+    }
+
+    fn decode(&self, frame: &[u8]) -> Option<DecodedData> {
+        let _guard = self
+            .call_lock
+            .lock()
+            .expect("lua decoder call mutex poisoned");
+        let result = (|| -> mlua::Result<Option<DecodedData>> {
+            let function: Function = self.lua.registry_value(&self.decode)?;
+            let bytes = self.lua.create_string(frame)?;
+            decoded_from_value(function.call::<Value>(bytes)?, frame)
+        })();
+
+        match result {
+            Ok(decoded) => decoded,
+            Err(err) => {
+                warn!(script = %self.script_path, error = %err, "lua decoder decode failed");
+                None
+            }
+        }
+    }
+}
+
+fn load_script_table(lua: &Lua, script_path: &str) -> Result<Table> {
+    let script = fs::read_to_string(script_path)?;
+    match lua.load(&script).eval::<Value>()? {
+        Value::Table(table) => Ok(table),
+        other => Err(Error::Other(format!(
+            "lua script '{script_path}' must return a table, got {}",
+            other.type_name()
+        ))),
+    }
+}
+
+fn registry_function(
+    lua: &Lua,
+    table: &Table,
+    name: &str,
+    script_path: &str,
+) -> Result<RegistryKey> {
+    let value: Value = table.get(name)?;
+    match value {
+        Value::Function(function) => Ok(lua.create_registry_value(function)?),
+        other => Err(Error::Other(format!(
+            "lua script '{script_path}' field '{name}' must be a function, got {}",
+            other.type_name()
+        ))),
+    }
+}
+
+fn frames_from_value(value: Value) -> mlua::Result<Vec<Vec<u8>>> {
+    match value {
+        Value::Nil => Ok(Vec::new()),
+        Value::String(bytes) => Ok(vec![bytes.as_bytes().to_vec()]),
+        Value::Table(table) => {
+            let mut frames = Vec::new();
+            for value in table.sequence_values::<mlua::String>() {
+                frames.push(value?.as_bytes().to_vec());
+            }
+            Ok(frames)
+        }
+        other => Err(mlua::Error::RuntimeError(format!(
+            "framer feed must return nil, string, or table of strings, got {}",
+            other.type_name()
+        ))),
+    }
+}
+
+fn optional_bytes_from_value(value: Value) -> mlua::Result<Option<Vec<u8>>> {
+    match value {
+        Value::Nil => Ok(None),
+        Value::String(bytes) => Ok(Some(bytes.as_bytes().to_vec())),
+        other => Err(mlua::Error::RuntimeError(format!(
+            "framer flush must return nil or string, got {}",
+            other.type_name()
+        ))),
+    }
+}
+
+fn decoded_from_value(value: Value, raw: &[u8]) -> mlua::Result<Option<DecodedData>> {
+    match value {
+        Value::Nil => Ok(None),
+        Value::String(text) => Ok(Some(DecodedData::Text(text.to_str()?.to_string()))),
+        Value::Table(table) => decoded_from_table(table, raw).map(Some),
+        other => Err(mlua::Error::RuntimeError(format!(
+            "decoder decode must return nil, string, or table, got {}",
+            other.type_name()
+        ))),
+    }
+}
+
+fn decoded_from_table(table: Table, raw: &[u8]) -> mlua::Result<DecodedData> {
+    let kind: String = table.get("kind")?;
+    match kind.as_str() {
+        "text" => Ok(DecodedData::Text(table.get("data")?)),
+        "hex" => Ok(DecodedData::Hex(table.get("data")?)),
+        "binary" => {
+            let bytes: mlua::String = table.get("data")?;
+            Ok(DecodedData::Binary(bytes.as_bytes().to_vec()))
+        }
+        "plot" => Ok(DecodedData::Plot(plot_from_table(table, raw)?)),
+        other => Err(mlua::Error::RuntimeError(format!(
+            "unknown lua decoder kind '{other}'"
+        ))),
+    }
+}
+
+fn plot_from_table(table: Table, raw: &[u8]) -> mlua::Result<PlotFrame> {
+    let channels_table: Table = table.get("channels")?;
+    let mut channels = Vec::new();
+    for channel in channels_table.sequence_values::<Table>() {
+        let channel = channel?;
+        let mut samples = Vec::new();
+        for sample in channel.sequence_values::<f64>() {
+            samples.push(sample?);
+        }
+        channels.push(samples);
+    }
+
+    Ok(PlotFrame {
+        channels,
+        raw: raw.to_vec(),
+        sample_type: match table.get::<Option<String>>("sample_type")?.as_deref() {
+            Some(value) => parse_sample_type(value)?,
+            None => SampleType::F64,
+        },
+        format: match table.get::<Option<String>>("format")?.as_deref() {
+            Some(value) => parse_plot_format(value)?,
+            None => PlotFormat::Interleaved,
+        },
+    })
+}
+
+fn parse_sample_type(value: &str) -> mlua::Result<SampleType> {
+    match value {
+        "i8" | "I8" => Ok(SampleType::I8),
+        "u8" | "U8" => Ok(SampleType::U8),
+        "i16" | "I16" => Ok(SampleType::I16),
+        "u16" | "U16" => Ok(SampleType::U16),
+        "i32" | "I32" => Ok(SampleType::I32),
+        "u32" | "U32" => Ok(SampleType::U32),
+        "i64" | "I64" => Ok(SampleType::I64),
+        "u64" | "U64" => Ok(SampleType::U64),
+        "f32" | "F32" => Ok(SampleType::F32),
+        "f64" | "F64" => Ok(SampleType::F64),
+        other => Err(mlua::Error::RuntimeError(format!(
+            "unknown plot sample_type '{other}'"
+        ))),
+    }
+}
+
+fn parse_plot_format(value: &str) -> mlua::Result<PlotFormat> {
+    match value {
+        "Interleaved" | "interleaved" => Ok(PlotFormat::Interleaved),
+        "Block" | "block" => Ok(PlotFormat::Block),
+        "XY" | "xy" => Ok(PlotFormat::XY),
+        other => Err(mlua::Error::RuntimeError(format!(
+            "unknown plot format '{other}'"
+        ))),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::path::PathBuf;
+    use std::time::{SystemTime, UNIX_EPOCH};
+
+    fn write_script(name: &str, script: &str) -> PathBuf {
+        let nonce = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .unwrap()
+            .as_nanos();
+        let path = std::env::temp_dir().join(format!("pipeview_{name}_{nonce}.lua"));
+        fs::write(&path, script).unwrap();
+        path
+    }
+
+    #[test]
+    fn lua_framer_splits_lines_across_chunks() {
+        let path = write_script(
+            "framer",
+            r#"
+            local buffer = ""
+            return {
+                feed = function(bytes)
+                    buffer = buffer .. bytes
+                    local frames = {}
+                    while true do
+                        local i = buffer:find("\n", 1, true)
+                        if not i then break end
+                        frames[#frames + 1] = buffer:sub(1, i - 1)
+                        buffer = buffer:sub(i + 1)
+                    end
+                    return frames
+                end,
+                flush = function()
+                    if #buffer == 0 then return nil end
+                    local frame = buffer
+                    buffer = ""
+                    return frame
+                end,
+                reset = function()
+                    buffer = ""
+                end,
+                pending_len = function()
+                    return #buffer
+                end,
+            }
+            "#,
+        );
+
+        let mut framer = LuaFramer::from_script_path(path.to_string_lossy()).unwrap();
+        assert_eq!(framer.feed(b"one\nt"), vec![b"one".to_vec()]);
+        assert_eq!(framer.pending_len(), 1);
+        assert_eq!(framer.feed(b"wo\nthree"), vec![b"two".to_vec()]);
+        assert_eq!(framer.flush(), Some(b"three".to_vec()));
+        assert_eq!(framer.pending_len(), 0);
+
+        fs::remove_file(path).unwrap();
+    }
+
+    #[test]
+    fn lua_decoder_maps_text_binary_and_plot() {
+        let path = write_script(
+            "decoder",
+            r#"
+            return {
+                decode = function(frame)
+                    if frame == "skip" then
+                        return nil
+                    elseif frame == "bin" then
+                        return { kind = "binary", data = "\1\2" }
+                    elseif frame == "plot" then
+                        return {
+                            kind = "plot",
+                            channels = { { 1.0, 2.0 }, { 3.5, 4.5 } },
+                            sample_type = "F64",
+                            format = "Block",
+                        }
+                    end
+                    return { kind = "text", data = "decoded:" .. frame }
+                end,
+            }
+            "#,
+        );
+
+        let decoder = LuaDecoder::from_script_path(path.to_string_lossy()).unwrap();
+        assert!(decoder.decode(b"skip").is_none());
+        assert!(matches!(
+            decoder.decode(b"abc"),
+            Some(DecodedData::Text(text)) if text == "decoded:abc"
+        ));
+        assert!(matches!(
+            decoder.decode(b"bin"),
+            Some(DecodedData::Binary(bytes)) if bytes == vec![1, 2]
+        ));
+        match decoder.decode(b"plot").unwrap() {
+            DecodedData::Plot(frame) => {
+                assert_eq!(frame.channels, vec![vec![1.0, 2.0], vec![3.5, 4.5]]);
+                assert_eq!(frame.sample_type, SampleType::F64);
+                assert_eq!(frame.format, PlotFormat::Block);
+                assert_eq!(frame.raw, b"plot");
+            }
+            other => panic!("expected plot, got {other:?}"),
+        }
+
+        fs::remove_file(path).unwrap();
+    }
+
+    #[test]
+    fn lua_framer_requires_expected_functions() {
+        let path = write_script("bad_framer", "return { feed = function() return {} end }");
+        let result = LuaFramer::from_script_path(path.to_string_lossy());
+        assert!(result.is_err());
+        fs::remove_file(path).unwrap();
+    }
+}

crates/pipeview-client/src/lua/mod.rs

@@ -6,6 +6,7 @@ use mlua::{Lua, LuaSerdeExt, Result as LuaResult, Table, Value};
 use crate::config::SessionConfig;
 use crate::manager::SessionManager;
 
+pub(crate) mod codec;
 mod session_api;
 
 #[derive(Clone)]
@@ -80,9 +81,9 @@ pub fn register(lua: &Lua) -> LuaResult<()> {
 
 pub fn register_with_manager(lua: &Lua, manager: SessionManager) -> LuaResult<()> {
     let runtime = LuaRuntime::new(manager);
-    let xserial = lua.create_table()?;
+    let pipeview = lua.create_table()?;
 
-    xserial.set("open", {
+    pipeview.set("open", {
         let runtime = runtime.clone();
         lua.create_async_function(move |lua, config: Table| {
             let runtime = runtime.clone();
@@ -95,15 +96,15 @@ pub fn register_with_manager(lua: &Lua, manager: SessionManager) -> LuaResult<()
         })?
     })?;
 
-    xserial.set(
+    pipeview.set(
         "list_ports",
         lua.create_function(|_, ()| {
-            let ports = xserial_core::transport::serial::SerialTransport::list_ports();
+            let ports = pipeview_core::transport::serial::SerialTransport::list_ports();
             Ok(ports.into_iter().map(|p| p.port_name).collect::<Vec<_>>())
         })?,
     )?;
 
-    xserial.set("sleep", {
+    pipeview.set("sleep", {
         let runtime = runtime.clone();
         lua.create_async_function(move |lua, ms: u64| {
             let runtime = runtime.clone();
@@ -115,7 +116,7 @@ pub fn register_with_manager(lua: &Lua, manager: SessionManager) -> LuaResult<()
         })?
     })?;
 
-    xserial.set("poll", {
+    pipeview.set("poll", {
         let runtime = runtime.clone();
         lua.create_async_function(move |lua, limit_per_session: Option<usize>| {
             let runtime = runtime.clone();
@@ -123,7 +124,7 @@ pub fn register_with_manager(lua: &Lua, manager: SessionManager) -> LuaResult<()
         })?
     })?;
 
-    xserial.set(
+    pipeview.set(
         "log",
         lua.create_function(|_, msg: String| {
             tracing::info!("[lua] {}", msg);
@@ -131,7 +132,7 @@ pub fn register_with_manager(lua: &Lua, manager: SessionManager) -> LuaResult<()
         })?,
     )?;
 
-    lua.globals().set("xserial", xserial)?;
+    lua.globals().set("pipeview", pipeview)?;
     Ok(())
 }
 
@@ -145,9 +146,9 @@ mod tests {
         let lua = Lua::new();
         register(&lua).unwrap();
 
-        let xserial: Table = lua.globals().get("xserial").unwrap();
+        let pipeview: Table = lua.globals().get("pipeview").unwrap();
         for name in ["open", "list_ports", "sleep", "poll", "log"] {
-            let value: Value = xserial.get(name).unwrap();
+            let value: Value = pipeview.get(name).unwrap();
             assert!(
                 matches!(value, Value::Function(_)),
                 "{name} should be a function"
@@ -161,8 +162,8 @@ mod tests {
         let manager = SessionManager::new();
         register_with_manager(&lua, manager.clone()).unwrap();
 
-        let xserial: Table = lua.globals().get("xserial").unwrap();
+        let pipeview: Table = lua.globals().get("pipeview").unwrap();
-        let open: Value = xserial.get("open").unwrap();
+        let open: Value = pipeview.get("open").unwrap();
         assert!(matches!(open, Value::Function(_)));
         assert_eq!(manager.count(), 0);
     }

crates/pipeview-client/src/lua/session_api.rs

@@ -6,9 +6,9 @@ use std::sync::{
 use std::time::Duration;
 
 use mlua::{Function, Lua, LuaSerdeExt, RegistryKey, UserData, UserDataMethods, Value, Variadic};
+use pipeview_core::protocol::DecodedData;
 use tokio::sync::mpsc;
 use tokio::task::JoinHandle;
-use xserial_core::protocol::DecodedData;
 
 use crate::config::SessionConfig;
 use crate::lua::LuaRuntime;
@@ -224,12 +224,12 @@ impl CallbackState {
 
 impl Drop for CallbackState {
     fn drop(&mut self) {
-        if let Ok(mut relay_task) = self.relay_task.lock() {
+        if let Ok(mut relay_task) = self.relay_task.lock()
-            if let Some(task) = relay_task.take() {
+            && let Some(task) = relay_task.take()
+        {
             task.abort();
         }
     }
-    }
 }
 
 impl UserData for LuaSessionHandle {

crates/pipeview-client/src/session.rs

@@ -11,8 +11,8 @@ use tokio::sync::{Mutex, broadcast, mpsc};
 use tokio::task::JoinHandle;
 use tracing::{debug, error, info, warn};
 
-use xserial_core::pipeline::{MultiPipeline, Pipeline};
+use pipeview_core::pipeline::{MultiPipeline, Pipeline};
-use xserial_core::transport::Connection;
+use pipeview_core::transport::Connection;
 
 use crate::cmd::SessionCmd;
 use crate::config::SessionConfig;
@@ -138,6 +138,22 @@ impl SessionHandle {
             .map_err(|_| String::from("session closed"))
     }
 
+    pub async fn set_dtr(&self, state: bool) -> Result<(), String> {
+        self.inner
+            .cmd_tx
+            .send(SessionCmd::SetDtr(state))
+            .await
+            .map_err(|_| String::from("session closed"))
+    }
+
+    pub async fn set_rts(&self, state: bool) -> Result<(), String> {
+        self.inner
+            .cmd_tx
+            .send(SessionCmd::SetRts(state))
+            .await
+            .map_err(|_| String::from("session closed"))
+    }
+
     pub async fn read(&self, timeout_ms: u64) -> Option<DecodedEntry> {
         let mut rx = self.inner.event_tx.subscribe();
         let deadline = Duration::from_millis(timeout_ms);
@@ -176,13 +192,13 @@ impl Drop for SessionHandle {
     fn drop(&mut self) {
         if Arc::strong_count(&self.inner) == 1 {
             self.inner.request_close_nonblocking();
-            if let Ok(mut task) = self.inner.task.try_lock() {
+            if let Ok(mut task) = self.inner.task.try_lock()
-                if let Some(task) = task.take() {
+                && let Some(task) = task.take()
+            {
                 task.abort();
             }
         }
     }
-    }
 }
 
 pub struct Session {
@@ -190,6 +206,7 @@ pub struct Session {
     config: SessionConfig,
     conn: Option<Connection>,
     pipeline: MultiPipeline,
+    pipeline_build_error: Option<String>,
     history: RingBuffer<DecodedEntry>,
     cmd_rx: mpsc::Receiver<SessionCmd>,
     event_tx: broadcast::Sender<SessionEvent>,
@@ -201,9 +218,17 @@ impl Session {
     pub fn spawn(id: SessionId, config: SessionConfig) -> SessionHandle {
         let (cmd_tx, cmd_rx) = mpsc::channel(32);
         let (event_tx, _) = broadcast::channel(256);
+        let (pipeline, pipeline_build_error) = match Self::build_pipeline(&config) {
+            Ok(pipeline) => (pipeline, None),
+            Err(err) => (
+                MultiPipeline::new(),
+                Some(format!("pipeline build failed: {err}")),
+            ),
+        };
         let mut session = Self {
             id,
-            pipeline: Self::build_pipeline(&config),
+            pipeline,
+            pipeline_build_error,
             history: RingBuffer::new(config.history_limit),
             config,
             conn: None,
@@ -217,22 +242,29 @@ impl Session {
         SessionHandle::new(inner)
     }
 
-    fn build_pipeline(config: &SessionConfig) -> MultiPipeline {
+    fn build_pipeline(config: &SessionConfig) -> crate::Result<MultiPipeline> {
         let mut pipelines = MultiPipeline::new();
         for pipeline in &config.pipelines {
             pipelines.add(Pipeline::new(
                 pipeline.name.clone(),
-                pipeline.framer.clone().build(),
+                pipeline.framer.clone().build()?,
-                pipeline.decoder.clone().build(),
+                pipeline.decoder.clone().build()?,
             ));
         }
-        pipelines
+        Ok(pipelines)
     }
 
     async fn run(&mut self) {
         info!(session_id = self.id, "session started");
 
-        if let Err(err) = self.connect().await {
+        if let Some(message) = self.pipeline_build_error.take() {
+            self.emit_error(message);
+            self.desired_connected = false;
+        }
+
+        if self.desired_connected
+            && let Err(err) = self.connect().await
+        {
             warn!(session_id = self.id, error = %err, "initial connect failed");
             self.emit_error(format!("connect failed: {err}"));
         }
@@ -272,11 +304,11 @@ impl Session {
             }
             Some(SessionCmd::Connect) => {
                 self.desired_connected = true;
-                if self.conn.is_none() {
+                if self.conn.is_none()
-                    if let Err(err) = self.connect().await {
+                    && let Err(err) = self.connect().await
+                {
                     self.emit_error(format!("connect failed: {err}"));
                 }
-                }
                 true
             }
             Some(SessionCmd::Disconnect) => {
@@ -304,6 +336,14 @@ impl Session {
                 self.handle_reconfigure(config).await;
                 true
             }
+            Some(SessionCmd::SetDtr(state)) => {
+                self.handle_set_dtr(state);
+                true
+            }
+            Some(SessionCmd::SetRts(state)) => {
+                self.handle_set_rts(state);
+                true
+            }
             None => false,
         }
     }
@@ -322,9 +362,16 @@ impl Session {
 
     async fn handle_reconfigure(&mut self, config: SessionConfig) {
         info!(session_id = self.id, "reconfiguring session");
+        let pipeline = match Self::build_pipeline(&config) {
+            Ok(pipeline) => pipeline,
+            Err(err) => {
+                self.emit_error(format!("pipeline build failed: {err}"));
+                return;
+            }
+        };
         self.disconnect(true).await;
         self.config = config;
-        self.pipeline = Self::build_pipeline(&self.config);
+        self.pipeline = pipeline;
         self.history = RingBuffer::new(self.config.history_limit);
 
         if let Err(err) = self.connect().await {
@@ -332,6 +379,28 @@ impl Session {
         }
     }
 
+    fn handle_set_dtr(&mut self, state: bool) {
+        match self.conn.as_mut() {
+            Some(conn) => {
+                if let Err(err) = conn.set_dtr(state) {
+                    self.emit_error(format!("set_dtr: {err}"));
+                }
+            }
+            None => self.emit_error(String::from("set_dtr: session not connected")),
+        }
+    }
+
+    fn handle_set_rts(&mut self, state: bool) {
+        match self.conn.as_mut() {
+            Some(conn) => {
+                if let Err(err) = conn.set_rts(state) {
+                    self.emit_error(format!("set_rts: {err}"));
+                }
+            }
+            None => self.emit_error(String::from("set_rts: session not connected")),
+        }
+    }
+
     async fn handle_read_result(
         &mut self,
         result: Result<Vec<DecodedEntry>, std::io::Error>,
@@ -430,8 +499,8 @@ async fn try_read(
     }
 }
 
-fn to_io_error(err: xserial_core::error::Error) -> std::io::Error {
+fn to_io_error(err: pipeview_core::error::Error) -> std::io::Error {
-    io::Error::new(io::ErrorKind::Other, err.to_string())
+    io::Error::other(err.to_string())
 }
 
 #[cfg(test)]
@@ -441,7 +510,7 @@ mod tests {
 
     fn tcp_config() -> SessionConfig {
         SessionConfig {
-            transport: xserial_core::transport::TransportConfig::Tcp {
+            transport: pipeview_core::transport::TransportConfig::Tcp {
                 addr: "127.0.0.1:1".into(),
             },
             pipelines: vec![PipelineConfig {
@@ -451,7 +520,7 @@ mod tests {
                     max_line_len: 65536,
                 },
                 decoder: DecoderConfig::Text {
-                    encoding: xserial_core::protocol::text::TextEncoding::Utf8,
+                    encoding: pipeview_core::protocol::text::TextEncoding::Utf8,
                 },
             }],
             ..Default::default()
@@ -507,6 +576,7 @@ mod tests {
         let handle = Session::spawn(2, tcp_config());
         tokio::time::sleep(Duration::from_millis(200)).await;
         let _ = handle.send(b"data".to_vec()).await;
+        let _ = handle.close().await;
         handle.join().await;
     }
 

crates/pipeview-client/tests/lua_tests.rs

@@ -1,5 +1,6 @@
 use std::sync::Once;
 use std::time::Duration;
+use std::{fs, path::PathBuf};
 
 use mlua::Lua;
 use tokio::io::{AsyncReadExt, AsyncWriteExt};
@@ -10,12 +11,22 @@ static INIT: Once = Once::new();
 fn init_tracing() {
     INIT.call_once(|| {
         tracing_subscriber::fmt()
-            .with_env_filter("xserial=trace")
+            .with_env_filter("pipeview=trace")
             .try_init()
             .ok();
     });
 }
 
+fn write_temp_lua(name: &str, script: &str) -> PathBuf {
+    let nonce = std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .unwrap()
+        .as_nanos();
+    let path = std::env::temp_dir().join(format!("pipeview_{name}_{nonce}.lua"));
+    fs::write(&path, script).unwrap();
+    path
+}
+
 fn text_pipeline_lua() -> &'static str {
     r#"
         {
@@ -36,18 +47,18 @@ fn hex_pipeline_lua() -> &'static str {
     "#
 }
 
-// ── xserial.sleep / xserial.log ──────────────────────────────────
+// ── pipeview.sleep / pipeview.log ──────────────────────────────────
 
 #[tokio::test]
 async fn lua_sleep_and_log() {
     let lua = Lua::new();
-    xserial_client::lua::register(&lua).unwrap();
+    pipeview_client::lua::register(&lua).unwrap();
 
     lua.load(
         r#"
-        xserial.log("test start")
+        pipeview.log("test start")
-        xserial.sleep(50)
+        pipeview.sleep(50)
-        xserial.log("test end")
+        pipeview.log("test end")
         "#,
     )
     .exec_async()
@@ -55,15 +66,15 @@ async fn lua_sleep_and_log() {
     .unwrap();
 }
 
-// ── xserial.list_ports ───────────────────────────────────────────
+// ── pipeview.list_ports ───────────────────────────────────────────
 
 #[tokio::test]
 async fn lua_list_ports() {
     let lua = Lua::new();
-    xserial_client::lua::register(&lua).unwrap();
+    pipeview_client::lua::register(&lua).unwrap();
 
     let result: Vec<String> = lua
-        .load(r#"return xserial.list_ports()"#)
+        .load(r#"return pipeview.list_ports()"#)
         .eval_async()
         .await
         .unwrap();
@@ -73,7 +84,7 @@ async fn lua_list_ports() {
     let _ = result;
 }
 
-// ── xserial.open + session:send / session:read / session:close ────
+// ── pipeview.open + session:send / session:read / session:close ────
 
 #[tokio::test]
 async fn lua_session_open_send_read_close() {
@@ -91,11 +102,11 @@ async fn lua_session_open_send_read_close() {
     });
 
     let lua = Lua::new();
-    xserial_client::lua::register(&lua).unwrap();
+    pipeview_client::lua::register(&lua).unwrap();
 
     let script = format!(
         r#"
-        local sess = xserial.open({{
+        local sess = pipeview.open({{
             transport = {{ Tcp = {{ addr = "{}" }} }},
             pipelines = {{{}}}
         }})
@@ -130,11 +141,11 @@ async fn lua_session_read_timeout() {
     });
 
     let lua = Lua::new();
-    xserial_client::lua::register(&lua).unwrap();
+    pipeview_client::lua::register(&lua).unwrap();
 
     let script = format!(
         r#"
-        local sess = xserial.open({{
+        local sess = pipeview.open({{
             transport = {{ Tcp = {{ addr = "{}" }} }},
             pipelines = {{{}}}
         }})
@@ -151,7 +162,7 @@ async fn lua_session_read_timeout() {
     lua.load(&script).exec_async().await.unwrap();
 }
 
-// ── xserial.open with hex decoder ────────────────────────────────
+// ── pipeview.open with hex decoder ────────────────────────────────
 
 #[tokio::test]
 async fn lua_session_hex_decoder() {
@@ -165,11 +176,11 @@ async fn lua_session_hex_decoder() {
     });
 
     let lua = Lua::new();
-    xserial_client::lua::register(&lua).unwrap();
+    pipeview_client::lua::register(&lua).unwrap();
 
     let script = format!(
         r#"
-        local sess = xserial.open({{
+        local sess = pipeview.open({{
             transport = {{ Tcp = {{ addr = "{}" }} }},
             pipelines = {{{}}}
         }})
@@ -190,6 +201,102 @@ async fn lua_session_hex_decoder() {
     server.await.unwrap();
 }
 
+// ── pipeview.open with Lua framer + Lua decoder ───────────────────
+
+#[tokio::test]
+async fn lua_session_custom_lua_pipeline() {
+    let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
+    let addr = listener.local_addr().unwrap().to_string();
+
+    let framer_path = write_temp_lua(
+        "custom_framer",
+        r#"
+        local buffer = ""
+        return {
+            feed = function(bytes)
+                buffer = buffer .. bytes
+                local frames = {}
+                while true do
+                    local i = buffer:find("|", 1, true)
+                    if not i then break end
+                    frames[#frames + 1] = buffer:sub(1, i - 1)
+                    buffer = buffer:sub(i + 1)
+                end
+                return frames
+            end,
+            flush = function()
+                if #buffer == 0 then return nil end
+                local frame = buffer
+                buffer = ""
+                return frame
+            end,
+            reset = function()
+                buffer = ""
+            end,
+            pending_len = function()
+                return #buffer
+            end,
+        }
+        "#,
+    );
+    let decoder_path = write_temp_lua(
+        "custom_decoder",
+        r#"
+        return {
+            decode = function(frame)
+                return { kind = "text", data = string.upper(frame) }
+            end,
+        }
+        "#,
+    );
+
+    let server = tokio::spawn(async move {
+        let (mut stream, _) = listener.accept().await.unwrap();
+        stream.write_all(b"alpha|").await.unwrap();
+        tokio::time::sleep(Duration::from_millis(50)).await;
+        stream.write_all(b"beta|").await.unwrap();
+        tokio::time::sleep(Duration::from_millis(200)).await;
+    });
+
+    let lua = Lua::new();
+    pipeview_client::lua::register(&lua).unwrap();
+
+    let script = format!(
+        r#"
+        local sess = pipeview.open({{
+            transport = {{ Tcp = {{ addr = "{}" }} }},
+            pipelines = {{
+                {{
+                    name = "custom",
+                    framer = {{ Lua = {{ script_path = [[{}]] }} }},
+                    decoder = {{ Lua = {{ script_path = [[{}]] }} }}
+                }}
+            }}
+        }})
+
+        local r1 = sess:read(5000)
+        assert(r1 ~= nil, "expected first custom frame")
+        assert(r1.pipeline == "custom", "expected custom pipeline, got " .. tostring(r1.pipeline))
+        assert(r1.kind == "text", "expected text kind, got " .. tostring(r1.kind))
+        assert(r1.data == "ALPHA", "expected ALPHA, got " .. tostring(r1.data))
+
+        local r2 = sess:read(5000)
+        assert(r2 ~= nil, "expected second custom frame")
+        assert(r2.data == "BETA", "expected BETA, got " .. tostring(r2.data))
+
+        sess:close()
+        "#,
+        addr,
+        framer_path.display(),
+        decoder_path.display()
+    );
+
+    lua.load(&script).exec_async().await.unwrap();
+    server.await.unwrap();
+    fs::remove_file(framer_path).unwrap();
+    fs::remove_file(decoder_path).unwrap();
+}
+
 // ── session:on_data callback ─────────────────────────────────────
 
 #[tokio::test]
@@ -204,12 +311,12 @@ async fn lua_session_on_data_callback() {
     });
 
     let lua = Lua::new();
-    xserial_client::lua::register(&lua).unwrap();
+    pipeview_client::lua::register(&lua).unwrap();
 
     let script = format!(
         r#"
         local received = {{}}
-        local sess = xserial.open({{
+        local sess = pipeview.open({{
             transport = {{ Tcp = {{ addr = "{}" }} }},
             pipelines = {{{}}}
         }})
@@ -220,8 +327,8 @@ async fn lua_session_on_data_callback() {
 
         for _ = 1, 50 do
             if #received < 2 then
-                xserial.poll(1)
+                pipeview.poll(1)
-                xserial.sleep(10)
+                pipeview.sleep(10)
             end
         end
 
@@ -264,11 +371,11 @@ async fn lua_session_reconfigure() {
     });
 
     let lua = Lua::new();
-    xserial_client::lua::register(&lua).unwrap();
+    pipeview_client::lua::register(&lua).unwrap();
 
     let script = format!(
         r#"
-        local sess = xserial.open({{
+        local sess = pipeview.open({{
             transport = {{ Tcp = {{ addr = "{}" }} }},
             pipelines = {{{}}}
         }})
@@ -313,11 +420,11 @@ async fn lua_session_next_event_stream() {
     });
 
     let lua = Lua::new();
-    xserial_client::lua::register(&lua).unwrap();
+    pipeview_client::lua::register(&lua).unwrap();
 
     let script = format!(
         r#"
-        local sess = xserial.open({{
+        local sess = pipeview.open({{
             transport = {{ Tcp = {{ addr = "{}" }} }},
             pipelines = {{{}}}
         }})
@@ -343,7 +450,7 @@ async fn lua_session_next_event_stream() {
     server.await.unwrap();
 }
 
-// ── session:off + xserial.poll ───────────────────────────────────
+// ── session:off + pipeview.poll ───────────────────────────────────
 
 #[tokio::test]
 async fn lua_session_off_stops_future_callbacks() {
@@ -359,12 +466,12 @@ async fn lua_session_off_stops_future_callbacks() {
     });
 
     let lua = Lua::new();
-    xserial_client::lua::register(&lua).unwrap();
+    pipeview_client::lua::register(&lua).unwrap();
 
     let script = format!(
         r#"
         local received = {{}}
-        local sess = xserial.open({{
+        local sess = pipeview.open({{
             transport = {{ Tcp = {{ addr = "{}" }} }},
             pipelines = {{{}}}
         }})
@@ -375,8 +482,8 @@ async fn lua_session_off_stops_future_callbacks() {
 
         for _ = 1, 50 do
             if #received == 0 then
-                xserial.poll(1)
+                pipeview.poll(1)
-                xserial.sleep(10)
+                pipeview.sleep(10)
             end
         end
 
@@ -384,8 +491,8 @@ async fn lua_session_off_stops_future_callbacks() {
         assert(received[1] == "text:first")
         assert(sess:off(token) == true)
 
-        xserial.sleep(250)
+        pipeview.sleep(250)
-        xserial.poll(10)
+        pipeview.poll(10)
 
         assert(#received == 1, "callback should not fire after off")
         assert(sess:off(token) == false)

crates/pipeview-client/tests/session_lifecycle.rs

@@ -3,11 +3,11 @@ use std::time::Duration;
 use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use tokio::net::TcpListener;
 
-use xserial_client::SessionManager;
+use pipeview_client::SessionManager;
-use xserial_client::config::{DecoderConfig, FramerConfig, PipelineConfig, SessionConfig};
+use pipeview_client::config::{DecoderConfig, FramerConfig, PipelineConfig, SessionConfig};
-use xserial_client::session::{Session, SessionEvent};
+use pipeview_client::session::{Session, SessionEvent};
-use xserial_core::protocol::DecodedData;
+use pipeview_core::protocol::DecodedData;
-use xserial_core::transport::TransportConfig;
+use pipeview_core::transport::TransportConfig;
 
 fn tcp_config(addr: String) -> SessionConfig {
     SessionConfig {
@@ -19,7 +19,7 @@ fn tcp_config(addr: String) -> SessionConfig {
                 max_line_len: 1024 * 1024,
             },
             decoder: DecoderConfig::Text {
-                encoding: xserial_core::protocol::text::TextEncoding::Utf8,
+                encoding: pipeview_core::protocol::text::TextEncoding::Utf8,
             },
         }],
         history_limit: 100,
@@ -72,18 +72,15 @@ async fn session_multiple_reads() {
     let mut texts = Vec::new();
     tokio::time::timeout(Duration::from_secs(5), async {
         loop {
-            match rx.recv().await.unwrap() {
+            if let SessionEvent::Data(_, entry) = rx.recv().await.unwrap()
-                SessionEvent::Data(_, entry) => {
+                && let DecodedData::Text(s) = entry.data
-                    if let DecodedData::Text(s) = entry.data {
+            {
                 texts.push(s);
                 if texts.len() == 3 {
                     break;
                 }
             }
         }
-                _ => {}
-            }
-        }
     })
     .await
     .unwrap();
@@ -116,7 +113,7 @@ async fn session_multi_pipeline_text_and_hex() {
             uppercase: false,
             separator: " ".into(),
             bytes_per_group: 1,
-            endian: xserial_core::protocol::Endian::Big,
+            endian: pipeview_core::protocol::Endian::Big,
         },
     });
 
@@ -127,15 +124,12 @@ async fn session_multi_pipeline_text_and_hex() {
     let mut results = Vec::new();
     tokio::time::timeout(Duration::from_secs(5), async {
         loop {
-            match rx.recv().await.unwrap() {
+            if let SessionEvent::Data(_, entry) = rx.recv().await.unwrap() {
-                SessionEvent::Data(_, entry) => {
                 results.push((entry.pipeline_name.clone(), entry.data.clone()));
                 if results.len() == 2 {
                     break;
                 }
             }
-                _ => {}
-            }
         }
     })
     .await
@@ -291,7 +285,7 @@ async fn session_reconfigure_changes_pipeline() {
         uppercase: true,
         separator: " ".into(),
         bytes_per_group: 1,
-        endian: xserial_core::protocol::Endian::Big,
+        endian: pipeview_core::protocol::Endian::Big,
     };
 
     handle.reconfigure(new_cfg).await.unwrap();

crates/pipeview-core/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "xserial-core"
+name = "pipeview-core"
 version = "0.1.0"
 edition = "2024"
 

crates/pipeview-core/src/frame/length.rs

@@ -324,7 +324,7 @@ mod tests {
         let mut f = LengthPrefixedFramer::new(cfg);
         // Corrupt frame: claims 200 bytes, actual payload is 0xFF bytes
         let mut data = be2(200);
-        data.extend_from_slice(&vec![0xFFu8; 200]);
+        data.extend_from_slice(&[0xFFu8; 200]);
         // Followed by valid frame
         data.extend(&be2(3));
         data.extend_from_slice(b"foo");

crates/pipeview-core/src/frame/mixed.rs

@@ -72,11 +72,11 @@ impl MixedTextPlotFramer {
             return;
         }
 
-        if let Some(decoded) = cobs_decode(&self.plot_buf) {
+        if let Some(decoded) = cobs_decode(&self.plot_buf)
-            if decoded.len() <= self.config.max_plot_frame {
+            && decoded.len() <= self.config.max_plot_frame
+        {
             frames.push(tag_plot_frame(decoded));
         }
-        }
         self.plot_buf.clear();
         self.plot_overflow = false;
     }

crates/pipeview-core/src/pipeline.rs

@@ -61,11 +61,11 @@ pub struct PipelineResult {
 /// Manages multiple [`Pipeline`]s, feeding the same byte stream to all of them.
 ///
 /// ```
-/// use xserial_core::pipeline::{MultiPipeline, Pipeline};
+/// use pipeview_core::pipeline::{MultiPipeline, Pipeline};
-/// use xserial_core::frame::line::{LineFramer, LineConfig};
+/// use pipeview_core::frame::line::{LineFramer, LineConfig};
-/// use xserial_core::frame::fixed::FixedLengthFramer;
+/// use pipeview_core::frame::fixed::FixedLengthFramer;
-/// use xserial_core::protocol::text::{TextDecoder, TextEncoding};
+/// use pipeview_core::protocol::text::{TextDecoder, TextEncoding};
-/// use xserial_core::protocol::hex::{HexDecoder, HexConfig};
+/// use pipeview_core::protocol::hex::{HexDecoder, HexConfig};
 ///
 /// let mut mp = MultiPipeline::new();
 /// mp.add(

crates/pipeview-core/src/protocol/mixed.rs

@@ -52,7 +52,8 @@ impl MixedTextPlotDecoder {
             Endian::Big => 1,
         });
         packet.push(channels.min(u8::MAX as usize) as u8);
-        packet.extend_from_slice(&(samples_per_channel.min(u16::MAX as usize) as u16).to_le_bytes());
+        packet
+            .extend_from_slice(&(samples_per_channel.min(u16::MAX as usize) as u16).to_le_bytes());
         packet.extend_from_slice(&(payload.len().min(u32::MAX as usize) as u32).to_le_bytes());
         packet.extend_from_slice(payload);
         packet

crates/pipeview-core/src/protocol/plot.rs

@@ -469,7 +469,8 @@ mod tests {
         };
         let d = PlotDecoder::new(cfg);
         // 7 bytes: 1 full u32 (4 bytes) + 3 trailing bytes
-        let data = vec![1u32.to_le_bytes().to_vec(), vec![0xff; 3]].concat();
+        let mut data = 1u32.to_le_bytes().to_vec();
+        data.extend_from_slice(&[0xff; 3]);
         let result = d.decode(&data).unwrap();
         match result {
             DecodedData::Plot(frame) => {

crates/pipeview-core/src/transport/mod.rs

@@ -30,6 +30,14 @@ fn default_serial_flow_control() -> SerialFlowControl {
     SerialFlowControl::None
 }
 
+fn default_serial_dtr() -> bool {
+    false
+}
+
+fn default_serial_rts() -> bool {
+    false
+}
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
 pub enum TransportType {
     Serial,
@@ -60,6 +68,10 @@ pub enum TransportConfig {
         stop_bits: SerialStopBits,
         #[serde(default = "default_serial_flow_control")]
         flow_control: SerialFlowControl,
+        #[serde(default = "default_serial_dtr")]
+        dtr: bool,
+        #[serde(default = "default_serial_rts")]
+        rts: bool,
     },
     Tcp {
         addr: String,
@@ -96,6 +108,8 @@ impl Connection {
                 parity,
                 stop_bits,
                 flow_control,
+                dtr,
+                rts,
             } => Connection::Serial(SerialTransport::new(
                 port,
                 baud_rate,
@@ -103,6 +117,8 @@ impl Connection {
                 parity,
                 stop_bits,
                 flow_control,
+                dtr,
+                rts,
             )),
             TransportConfig::Tcp { addr } => Connection::Tcp(TcpTransport::new(addr)),
             TransportConfig::Udp {
@@ -153,6 +169,24 @@ impl Connection {
             Connection::Udp(t) => t.disconnect().await,
         }
     }
+
+    pub fn set_dtr(&mut self, state: bool) -> Result<()> {
+        match self {
+            Connection::Serial(t) => t.set_dtr(state),
+            Connection::Tcp(_) | Connection::Udp(_) => Err(crate::error::Error::ConnectionFailed(
+                "DTR only supported on Serial connections".into(),
+            )),
+        }
+    }
+
+    pub fn set_rts(&mut self, state: bool) -> Result<()> {
+        match self {
+            Connection::Serial(t) => t.set_rts(state),
+            Connection::Tcp(_) | Connection::Udp(_) => Err(crate::error::Error::ConnectionFailed(
+                "RTS only supported on Serial connections".into(),
+            )),
+        }
+    }
 }
 
 impl AsyncRead for Connection {
@@ -220,6 +254,8 @@ mod tests {
             parity: SerialParity::None,
             stop_bits: SerialStopBits::One,
             flow_control: SerialFlowControl::None,
+            dtr: false,
+            rts: false,
         }
     }
 
@@ -254,11 +290,11 @@ mod tests {
         assert_eq!(original, cloned);
 
         let original = TransportType::Tcp;
-        let cloned = original.clone();
+        let cloned = original;
         assert_eq!(original, cloned);
 
         let original = TransportType::Udp;
-        let cloned = original.clone();
+        let cloned = original;
         assert_eq!(original, cloned);
     }
 
@@ -312,6 +348,8 @@ mod tests {
             parity: SerialParity::None,
             stop_bits: SerialStopBits::One,
             flow_control: SerialFlowControl::None,
+            dtr: false,
+            rts: false,
         };
         let _ = format!("{:?}", cfg);
 
@@ -371,6 +409,8 @@ mod tests {
                 parity,
                 stop_bits,
                 flow_control,
+                dtr,
+                rts,
             } => {
                 assert_eq!(port, "COM1");
                 assert_eq!(baud_rate, 9600);
@@ -378,6 +418,8 @@ mod tests {
                 assert_eq!(parity, SerialParity::None);
                 assert_eq!(stop_bits, SerialStopBits::One);
                 assert_eq!(flow_control, SerialFlowControl::None);
+                assert!(!dtr);
+                assert!(!rts);
             }
             _ => panic!("expected Serial variant"),
         }
@@ -395,6 +437,8 @@ mod tests {
                 parity,
                 stop_bits,
                 flow_control,
+                dtr,
+                rts,
             } => {
                 assert_eq!(port, "COM2");
                 assert_eq!(baud_rate, 57600);
@@ -402,6 +446,8 @@ mod tests {
                 assert_eq!(parity, SerialParity::Even);
                 assert_eq!(stop_bits, SerialStopBits::Two);
                 assert_eq!(flow_control, SerialFlowControl::Hardware);
+                assert!(!dtr);
+                assert!(!rts);
             }
             _ => panic!("expected Serial variant"),
         }

crates/pipeview-core/src/transport/serial.rs

@@ -1,4 +1,5 @@
 use async_trait::async_trait;
+use serialport::SerialPort;
 use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
 use tokio_serial::{DataBits, FlowControl, Parity, SerialPortBuilderExt, SerialStream, StopBits};
 use tracing::{debug, info, warn};
@@ -83,9 +84,12 @@ pub struct SerialTransport {
     parity: SerialParity,
     stop_bits: SerialStopBits,
     flow_control: SerialFlowControl,
+    dtr: bool,
+    rts: bool,
 }
 
 impl SerialTransport {
+    #[allow(clippy::too_many_arguments)]
     pub fn new(
         port_name: String,
         baud_rate: u32,
@@ -93,6 +97,8 @@ impl SerialTransport {
         parity: SerialParity,
         stop_bits: SerialStopBits,
         flow_control: SerialFlowControl,
+        dtr: bool,
+        rts: bool,
     ) -> Self {
         Self {
             port: None,
@@ -102,6 +108,8 @@ impl SerialTransport {
             parity,
             stop_bits,
             flow_control,
+            dtr,
+            rts,
         }
     }
 
@@ -138,6 +146,36 @@ impl SerialTransport {
     pub fn flow_control(&self) -> SerialFlowControl {
         self.flow_control
     }
+
+    pub fn set_dtr(&mut self, state: bool) -> Result<()> {
+        match &mut self.port {
+            Some(port) => {
+                port.write_data_terminal_ready(state)?;
+                self.dtr = state;
+                debug!("DTR set to {} on {}", state, self.port_name);
+                Ok(())
+            }
+            None => Err(crate::error::Error::ConnectionFailed(format!(
+                "port {} not open",
+                self.port_name
+            ))),
+        }
+    }
+
+    pub fn set_rts(&mut self, state: bool) -> Result<()> {
+        match &mut self.port {
+            Some(port) => {
+                port.write_request_to_send(state)?;
+                self.rts = state;
+                debug!("RTS set to {} on {}", state, self.port_name);
+                Ok(())
+            }
+            None => Err(crate::error::Error::ConnectionFailed(format!(
+                "port {} not open",
+                self.port_name
+            ))),
+        }
+    }
 }
 
 impl AsyncRead for SerialTransport {
@@ -221,7 +259,7 @@ impl Transport for SerialTransport {
             self.flow_control
         );
 
-        let port = tokio_serial::new(&self.port_name, self.baud_rate)
+        let mut port = tokio_serial::new(&self.port_name, self.baud_rate)
             .data_bits(self.data_bits.into())
             .parity(self.parity.into())
             .stop_bits(self.stop_bits.into())
@@ -234,6 +272,23 @@ impl Transport for SerialTransport {
                 ))
             })?;
 
+        // Linux kernel toggles DTR/RTS on every open() — restore configured
+        // state immediately afterward. Many wireless serial modules (HC-12,
+        // HC-15, HC-05, Bluetooth/UART bridges) need DTR asserted to stay in
+        // transparent data mode and not fall into AT-command / reset state.
+        if let Err(e) = port.write_data_terminal_ready(self.dtr) {
+            warn!(
+                "Failed to set DTR({}) on {}: {}",
+                self.dtr, self.port_name, e
+            );
+        }
+        if let Err(e) = port.write_request_to_send(self.rts) {
+            warn!(
+                "Failed to set RTS({}) on {}: {}",
+                self.rts, self.port_name, e
+            );
+        }
+
         debug!("Serial port {} opened successfully", self.port_name);
         self.port = Some(port);
         Ok(())
@@ -282,6 +337,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+            true,
+            true,
         );
         assert_eq!(transport.port_name(), "COM1");
         assert_eq!(transport.baud_rate(), 115200);
@@ -296,6 +353,8 @@ mod tests {
             SerialParity::Even,
             SerialStopBits::Two,
             SerialFlowControl::Hardware,
+            true,
+            true,
         );
         assert_eq!(transport.port_name(), "COM3");
         assert_eq!(transport.baud_rate(), 9600);
@@ -314,6 +373,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+            true,
+            true,
         );
         assert_eq!(transport.name(), "COM1");
     }
@@ -327,6 +388,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+            true,
+            true,
         );
         assert_eq!(transport.transport_type(), TransportType::Serial);
     }
@@ -340,6 +403,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+            true,
+            true,
         );
         assert!(!transport.is_connected());
     }
@@ -368,6 +433,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+            true,
+            true,
         );
         let pinned = Pin::new(&mut transport);
         let mut buf_data = [0u8; 16];
@@ -391,6 +458,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+            true,
+            true,
         );
         let pinned = Pin::new(&mut transport);
         let data = b"hello";
@@ -411,6 +480,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+            true,
+            true,
         );
         let pinned = Pin::new(&mut transport);
         let waker = noop_waker();
@@ -430,6 +501,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+            true,
+            true,
         );
         let pinned = Pin::new(&mut transport);
         let waker = noop_waker();
@@ -451,6 +524,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+            true,
+            true,
         );
         assert_eq!(transport.name(), "COM1");
     }
@@ -464,6 +539,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+            true,
+            true,
         );
         assert_eq!(transport.transport_type(), TransportType::Serial);
     }
@@ -477,6 +554,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+            true,
+            true,
         );
         assert!(!transport.is_connected());
     }

crates/pipeview-core/tests/pipeline.rs

@@ -4,26 +4,26 @@ use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use tokio::net::{TcpListener, UdpSocket};
 use tokio::time::timeout;
 
-use xserial_core::frame::{
+use pipeview_core::frame::{
     Endian, Framer,
-    cobs::cobs_encode as raw_cobs_encode,
     cobs::CobsFramer,
+    cobs::cobs_encode as raw_cobs_encode,
     fixed::FixedLengthFramer,
     length::{LengthConfig, LengthPrefixedFramer},
     line::{LineConfig, LineFramer},
     mixed::{MixedTextPlotConfig as MixedFramerConfig, MixedTextPlotFramer},
 };
-use xserial_core::protocol::{
+use pipeview_core::protocol::{
     DecodedData, ProtocolDecoder,
     hex::{HexConfig, HexDecoder},
     mixed::{MIXED_PLOT_ESCAPE, MIXED_PLOT_MARKER, MixedTextPlotConfig, MixedTextPlotDecoder},
     plot::{PlotConfig, PlotDecoder, PlotFormat, SampleType},
     text::{TextDecoder, TextEncoding},
 };
-use xserial_core::transport::serial::{
+use pipeview_core::transport::serial::{
     SerialDataBits, SerialFlowControl, SerialParity, SerialStopBits,
 };
-use xserial_core::transport::{Connection, TransportConfig, TransportType};
+use pipeview_core::transport::{Connection, TransportConfig, TransportType};
 
 const TEST_TIMEOUT: Duration = Duration::from_secs(5);
 
@@ -225,7 +225,7 @@ async fn tcp_fixed_plot_f32() {
     let server = tokio::spawn(async move {
         let (mut stream, _) = listener.accept().await.unwrap();
         // 3 samples × 4 bytes each = 12 bytes per frame
-        let samples: [f32; 3] = [1.0, -2.5, 3.14];
+        let samples: [f32; 3] = [1.0, -2.5, 0.0];
         let mut data = Vec::new();
         for s in &samples {
             data.extend_from_slice(&s.to_le_bytes());
@@ -255,7 +255,7 @@ async fn tcp_fixed_plot_f32() {
             assert_eq!(frame.channels[0].len(), 3);
             assert!((frame.channels[0][0] - 1.0).abs() < 1e-5);
             assert!((frame.channels[0][1] - (-2.5)).abs() < 1e-5);
-            assert!((frame.channels[0][2] - 3.14).abs() < 1e-5);
+            assert!((frame.channels[0][2] - 0.0).abs() < 1e-5);
         }
         other => panic!("expected Plot, got {:?}", other),
     }
@@ -298,10 +298,7 @@ async fn tcp_mixed_text_and_plot_single_stream() {
     conn.disconnect().await.unwrap();
 
     let decoder = MixedTextPlotDecoder::new(MixedTextPlotConfig::default());
-    let results: Vec<DecodedData> = frames
+    let results: Vec<DecodedData> = frames.iter().filter_map(|f| decoder.decode(f)).collect();
-        .iter()
-        .filter_map(|f| decoder.decode(f))
-        .collect();
 
     assert_eq!(results.len(), 3);
     assert!(matches!(&results[0], DecodedData::Text(s) if s == "status ok"));
@@ -691,6 +688,8 @@ async fn connection_transport_type_dispatch() {
         parity: SerialParity::None,
         stop_bits: SerialStopBits::One,
         flow_control: SerialFlowControl::None,
+        dtr: false,
+        rts: false,
     });
     let tcp = Connection::new(TransportConfig::Tcp {
         addr: "127.0.0.1:8080".into(),

crates/pipeview-gui/Cargo.toml

@@ -1,15 +1,15 @@
 [package]
-name = "xserial-gui"
+name = "pipeview-gui"
 version = "0.1.0"
 edition = "2024"
 
 [[bin]]
-name = "xserial-gui"
+name = "pipeview-gui"
 path = "src/main.rs"
 
 [dependencies]
-xserial-core = { path = "../xserial-core" }
+pipeview-core = { path = "../pipeview-core" }
-xserial-client = { path = "../xserial-client" }
+pipeview-client = { path = "../pipeview-client" }
 tokio = { workspace = true }
 egui = { workspace = true }
 eframe = { workspace = true }
@@ -19,3 +19,4 @@ tracing-subscriber = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
 hex = "0.4"
+ansitok = "0.3"

crates/pipeview-gui/src/ansi_render.rs

@@ -0,0 +1,451 @@
+use ansitok::{AnsiColor, ElementKind, VisualAttribute, parse_ansi, parse_ansi_sgr};
+use egui::Color32;
+use egui::text::{LayoutJob, TextFormat};
+use std::ops::Range;
+
+pub fn ansi_to_layout_job(text: &str, base_format: TextFormat) -> LayoutJob {
+    let mut job = LayoutJob::default();
+    for segment in ansi_segments(text, &base_format) {
+        job.append(segment.text, 0.0, segment.format);
+    }
+
+    job
+}
+
+pub fn ansi_to_layout_job_highlighted(
+    text: &str,
+    base_format: TextFormat,
+    query: &str,
+    case_sensitive: bool,
+    highlight_format: TextFormat,
+) -> LayoutJob {
+    if query.is_empty() {
+        return ansi_to_layout_job(text, base_format);
+    }
+
+    let segments = ansi_segments(text, &base_format);
+    let mut visible_text = String::with_capacity(segments.iter().map(|s| s.text.len()).sum());
+    for segment in &segments {
+        visible_text.push_str(segment.text);
+    }
+
+    let ranges = search_ranges(&visible_text, query, case_sensitive);
+    if ranges.is_empty() {
+        let mut job = LayoutJob::default();
+        for segment in segments {
+            job.append(segment.text, 0.0, segment.format);
+        }
+        return job;
+    }
+
+    let mut job = LayoutJob::default();
+    let mut offset = 0;
+    let mut range_idx = 0;
+    for segment in segments {
+        let len = segment.text.len();
+        append_segment_with_highlights(
+            &mut job,
+            segment.text,
+            segment.format,
+            &highlight_format,
+            offset,
+            &ranges,
+            &mut range_idx,
+        );
+        offset += len;
+    }
+    job
+}
+
+struct StyledSegment<'a> {
+    text: &'a str,
+    format: TextFormat,
+}
+
+#[derive(Default)]
+struct AnsiStyle {
+    fg: Option<Color32>,
+    bg: Option<Color32>,
+    bold: bool,
+    italic: bool,
+    underline: bool,
+    strikethrough: bool,
+}
+
+impl AnsiStyle {
+    fn apply_sgr(&mut self, attr: VisualAttribute) {
+        match attr {
+            VisualAttribute::Reset(0) => self.reset_all(),
+            VisualAttribute::Reset(22) => self.bold = false,
+            VisualAttribute::Reset(23) => self.italic = false,
+            VisualAttribute::Reset(24) => self.underline = false,
+            VisualAttribute::Reset(29) => self.strikethrough = false,
+            VisualAttribute::Reset(39) => self.fg = None,
+            VisualAttribute::Reset(49) => self.bg = None,
+            VisualAttribute::Reset(_) => {}
+            VisualAttribute::Bold => self.bold = true,
+            VisualAttribute::Faint => self.bold = false,
+            VisualAttribute::Italic => self.italic = true,
+            VisualAttribute::Underline => self.underline = true,
+            VisualAttribute::Crossedout => self.strikethrough = true,
+            VisualAttribute::FgColor(c) => self.fg = Some(ansi_color_to_egui(c)),
+            VisualAttribute::BgColor(c) => self.bg = Some(ansi_color_to_egui(c)),
+            _ => {}
+        }
+    }
+
+    fn reset_all(&mut self) {
+        *self = Self::default();
+    }
+
+    fn format(&self, base_format: &TextFormat) -> TextFormat {
+        let mut fmt = base_format.clone();
+
+        if let Some(c) = self.fg {
+            if self.bold {
+                fmt.color = brighten(c);
+            } else {
+                fmt.color = c;
+            }
+        }
+        if let Some(c) = self.bg {
+            fmt.background = c;
+        }
+        if self.italic {
+            fmt.italics = true;
+        }
+        if self.underline {
+            fmt.underline = egui::Stroke::new(1.0, fmt.color);
+        }
+        if self.strikethrough {
+            fmt.strikethrough = egui::Stroke::new(1.0, fmt.color);
+        }
+
+        fmt
+    }
+}
+
+fn ansi_segments<'a>(text: &'a str, base_format: &TextFormat) -> Vec<StyledSegment<'a>> {
+    let mut segments = Vec::new();
+    let mut style = AnsiStyle::default();
+
+    for element in parse_ansi(text) {
+        match element.kind() {
+            ElementKind::Text => {
+                let slice = &text[element.start()..element.end()];
+                if !slice.is_empty() {
+                    segments.push(StyledSegment {
+                        text: slice,
+                        format: style.format(base_format),
+                    });
+                }
+            }
+            ElementKind::Sgr => {
+                let sgr = &text[element.start()..element.end()];
+                apply_sgr_sequence(&mut style, sgr);
+            }
+            _ => {}
+        }
+    }
+
+    segments
+}
+
+fn apply_sgr_sequence(style: &mut AnsiStyle, sgr: &str) {
+    let params = sgr
+        .strip_prefix("\x1b[")
+        .and_then(|s| s.strip_suffix('m'))
+        .unwrap_or(sgr);
+
+    if params.is_empty() {
+        style.reset_all();
+        return;
+    }
+
+    for output in parse_ansi_sgr(sgr) {
+        if let Some(attr) = output.as_escape() {
+            style.apply_sgr(attr);
+        }
+    }
+}
+
+fn search_ranges(text: &str, query: &str, case_sensitive: bool) -> Vec<Range<usize>> {
+    if query.is_empty() {
+        return Vec::new();
+    }
+
+    if case_sensitive {
+        return text
+            .match_indices(query)
+            .map(|(start, matched)| start..start + matched.len())
+            .collect();
+    }
+
+    let (search_text, byte_to_original) = lowercase_with_byte_map(text);
+    let query = query.to_lowercase();
+    let mut ranges = Vec::new();
+    let mut idx = 0;
+    while let Some(pos) = search_text[idx..].find(&query) {
+        let start = idx + pos;
+        let end = start + query.len();
+        let original_start = byte_to_original.get(start).copied().unwrap_or(text.len());
+        let original_end = byte_to_original.get(end).copied().unwrap_or(text.len());
+        if original_start < original_end {
+            ranges.push(original_start..original_end);
+        }
+        idx = end;
+    }
+    ranges
+}
+
+fn lowercase_with_byte_map(text: &str) -> (String, Vec<usize>) {
+    let mut lowered = String::new();
+    let mut byte_to_original = Vec::new();
+
+    for (original_idx, ch) in text.char_indices() {
+        for lower_ch in ch.to_lowercase() {
+            lowered.push(lower_ch);
+            for _ in 0..lower_ch.len_utf8() {
+                byte_to_original.push(original_idx);
+            }
+        }
+    }
+
+    byte_to_original.push(text.len());
+    (lowered, byte_to_original)
+}
+
+fn append_segment_with_highlights(
+    job: &mut LayoutJob,
+    text: &str,
+    format: TextFormat,
+    highlight_format: &TextFormat,
+    segment_start: usize,
+    ranges: &[Range<usize>],
+    range_idx: &mut usize,
+) {
+    let segment_end = segment_start + text.len();
+    while *range_idx < ranges.len() && ranges[*range_idx].end <= segment_start {
+        *range_idx += 1;
+    }
+
+    let mut idx = *range_idx;
+    let mut last = 0;
+    while idx < ranges.len() && ranges[idx].start < segment_end {
+        let range = &ranges[idx];
+        let start = range.start.max(segment_start) - segment_start;
+        let end = range.end.min(segment_end) - segment_start;
+
+        if last < start {
+            job.append(&text[last..start], 0.0, format.clone());
+        }
+        if start < end {
+            job.append(&text[start..end], 0.0, highlight_format.clone());
+        }
+        last = end;
+
+        if range.end <= segment_end {
+            idx += 1;
+        } else {
+            break;
+        }
+    }
+
+    *range_idx = idx;
+    if last < text.len() {
+        job.append(&text[last..], 0.0, format);
+    }
+}
+
+fn ansi_color_to_egui(color: AnsiColor) -> Color32 {
+    match color {
+        AnsiColor::Bit4(c) => ansi_4bit(c),
+        AnsiColor::Bit8(c) => ansi_256(c),
+        AnsiColor::Bit24 { r, g, b } => Color32::from_rgb(r, g, b),
+    }
+}
+
+fn ansi_4bit(code: u8) -> Color32 {
+    match code {
+        30 => Color32::BLACK,
+        31 => Color32::from_rgb(194, 54, 33),
+        32 => Color32::from_rgb(37, 188, 36),
+        33 => Color32::from_rgb(173, 173, 39),
+        34 => Color32::from_rgb(73, 46, 225),
+        35 => Color32::from_rgb(211, 56, 211),
+        36 => Color32::from_rgb(51, 187, 200),
+        37 => Color32::from_rgb(203, 204, 205),
+
+        90 => Color32::from_rgb(129, 131, 131),
+        91 => Color32::from_rgb(252, 57, 31),
+        92 => Color32::from_rgb(49, 231, 34),
+        93 => Color32::from_rgb(234, 236, 35),
+        94 => Color32::from_rgb(88, 51, 255),
+        95 => Color32::from_rgb(249, 53, 248),
+        96 => Color32::from_rgb(20, 240, 240),
+        97 => Color32::from_rgb(233, 235, 235),
+
+        40 => Color32::BLACK,
+        41 => Color32::from_rgb(194, 54, 33),
+        42 => Color32::from_rgb(37, 188, 36),
+        43 => Color32::from_rgb(173, 173, 39),
+        44 => Color32::from_rgb(73, 46, 225),
+        45 => Color32::from_rgb(211, 56, 211),
+        46 => Color32::from_rgb(51, 187, 200),
+        47 => Color32::from_rgb(203, 204, 205),
+
+        100 => Color32::from_rgb(129, 131, 131),
+        101 => Color32::from_rgb(252, 57, 31),
+        102 => Color32::from_rgb(49, 231, 34),
+        103 => Color32::from_rgb(234, 236, 35),
+        104 => Color32::from_rgb(88, 51, 255),
+        105 => Color32::from_rgb(249, 53, 248),
+        106 => Color32::from_rgb(20, 240, 240),
+        107 => Color32::from_rgb(233, 235, 235),
+
+        _ => Color32::WHITE,
+    }
+}
+
+fn ansi_256(code: u8) -> Color32 {
+    match code {
+        0..=15 => ansi_4bit(if code < 8 { code + 30 } else { code + 82 }),
+        16..=231 => {
+            let idx = code - 16;
+            let cube = [0, 95, 135, 175, 215, 255];
+            let r = cube[(idx / 36) as usize];
+            let g = cube[((idx / 6) % 6) as usize];
+            let b = cube[(idx % 6) as usize];
+            Color32::from_rgb(r, g, b)
+        }
+        232..=255 => {
+            let v = (code - 232) * 10 + 8;
+            Color32::from_rgb(v, v, v)
+        }
+    }
+}
+
+fn brighten(color: Color32) -> Color32 {
+    Color32::from_rgb(
+        (color.r() as u32 * 13 / 10).min(255) as u8,
+        (color.g() as u32 * 13 / 10).min(255) as u8,
+        (color.b() as u32 * 13 / 10).min(255) as u8,
+    )
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn visible_text(job: &LayoutJob) -> String {
+        job.sections
+            .iter()
+            .map(|s| &job.text[s.byte_range.clone()])
+            .collect()
+    }
+
+    #[test]
+    fn plain_text_no_ansi() {
+        let fmt = TextFormat::default();
+        let job = ansi_to_layout_job("hello", fmt);
+        assert_eq!(job.sections.len(), 1);
+    }
+
+    #[test]
+    fn fg_red_reset() {
+        let fmt = TextFormat::default();
+        let job = ansi_to_layout_job("\x1b[31mred\x1b[0m plain", fmt);
+        assert!(job.sections.len() >= 2);
+        assert!(job.sections[0].format.color != job.sections[1].format.color);
+    }
+
+    #[test]
+    fn empty_sgr_resets_all_styles() {
+        let fmt = TextFormat {
+            color: Color32::from_rgb(1, 2, 3),
+            ..Default::default()
+        };
+        let job = ansi_to_layout_job("\x1b[31mred\x1b[m plain", fmt.clone());
+
+        assert_eq!(visible_text(&job), "red plain");
+        assert!(job.sections.len() >= 2);
+        assert_ne!(job.sections[0].format.color, job.sections[1].format.color);
+        assert_eq!(job.sections[1].format.color, fmt.color);
+    }
+
+    #[test]
+    fn selective_foreground_reset_keeps_background() {
+        let fmt = TextFormat {
+            color: Color32::from_rgb(1, 2, 3),
+            ..Default::default()
+        };
+        let job = ansi_to_layout_job("\x1b[41;37mtext\x1b[39mmore", fmt.clone());
+
+        assert_eq!(visible_text(&job), "textmore");
+        assert!(job.sections.len() >= 2);
+        assert_ne!(job.sections[0].format.color, job.sections[1].format.color);
+        assert_eq!(job.sections[1].format.color, fmt.color);
+        assert_ne!(job.sections[0].format.background, fmt.background);
+        assert_eq!(
+            job.sections[0].format.background,
+            job.sections[1].format.background
+        );
+    }
+
+    #[test]
+    fn bold_brightens_color() {
+        let fmt = TextFormat::default();
+        let job = ansi_to_layout_job("\x1b[1;31mbold red\x1b[0m", fmt);
+        assert_eq!(job.sections.len(), 1);
+        let c = job.sections[0].format.color;
+        assert!(c.r() > 200 || c.g() > 50 || c.b() > 30);
+    }
+
+    #[test]
+    fn strip_ansi_codes_from_output() {
+        let fmt = TextFormat::default();
+        let job = ansi_to_layout_job("\x1b[32mgreen\x1b[0m", fmt);
+        let text: String = job
+            .sections
+            .iter()
+            .map(|s| &job.text[s.byte_range.clone()])
+            .collect();
+        assert_eq!(text, "green");
+    }
+
+    #[test]
+    fn highlighted_search_uses_visible_ansi_text() {
+        let default = TextFormat {
+            color: Color32::WHITE,
+            ..Default::default()
+        };
+        let highlight = TextFormat {
+            color: Color32::BLACK,
+            background: Color32::from_rgb(255, 255, 0),
+            ..Default::default()
+        };
+        let job = ansi_to_layout_job_highlighted(
+            "\x1b[31mred\x1b[0m plain",
+            default,
+            "red plain",
+            true,
+            highlight.clone(),
+        );
+
+        assert_eq!(visible_text(&job), "red plain");
+        assert!(job.sections.len() >= 2);
+        assert!(
+            job.sections
+                .iter()
+                .all(|section| section.format.background == highlight.background)
+        );
+    }
+
+    #[test]
+    fn xterm_256_color_cube_values() {
+        assert_eq!(ansi_256(16), Color32::from_rgb(0, 0, 0));
+        assert_eq!(ansi_256(21), Color32::from_rgb(0, 0, 255));
+        assert_eq!(ansi_256(52), Color32::from_rgb(95, 0, 0));
+        assert_eq!(ansi_256(67), Color32::from_rgb(95, 135, 175));
+    }
+}

crates/pipeview-gui/src/app.rs

@@ -1,16 +1,22 @@
-use crate::app_state::{self, PersistedGuiState};
+use crate::app_state::{self, PersistedGuiState, SessionLogConfig};
+use std::path::PathBuf;
 use std::sync::mpsc;
-use std::time::Duration;
+use std::time::{Duration, Instant};
 
 use crate::buffers::{HexBuffer, PlotBuffer, TextBuffer};
+use crate::logging::{self, LogWriter};
 use crate::panels::{config, console, hex_view, plot_view, sidebar};
+use crate::perf::{DrainStats, GuiProfiler, GuiSnapshot};
+use crate::shortcuts::{self, default_bindings};
 use crate::ui_fonts::{self, FontCandidate, FontChoice, UiFontSettings};
 use egui::{Color32, Layout, Panel, Pos2, Rect, TextEdit, UiBuilder};
-use xserial_client::SessionManager;
+use pipeview_client::SessionManager;
-use xserial_client::config::SessionConfig;
+use pipeview_client::config::SessionConfig;
-use xserial_client::session::SessionEvent;
+use pipeview_client::session::SessionEvent;
-use xserial_core::protocol::DecodedData;
+use pipeview_core::protocol::DecodedData;
-use xserial_core::transport::TransportConfig;
+use pipeview_core::transport::TransportConfig;
+
+const DATA_REPAINT_INTERVAL: Duration = Duration::from_millis(33);
 
 #[derive(Clone)]
 pub enum ConnectionStatus {
@@ -44,6 +50,26 @@ pub enum SendMode {
     Hex,
 }
 
+#[derive(Clone, Copy, PartialEq)]
+#[allow(clippy::upper_case_acronyms)]
+pub enum LineEnding {
+    None,
+    LF,
+    CR,
+    CRLF,
+}
+
+impl std::fmt::Display for LineEnding {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::None => write!(f, "None"),
+            Self::LF => write!(f, "LF (\\n)"),
+            Self::CR => write!(f, "CR (\\r)"),
+            Self::CRLF => write!(f, "CRLF (\\r\\n)"),
+        }
+    }
+}
+
 #[derive(Clone, Copy)]
 pub struct DisplayOptions {
     pub show_timestamp: bool,
@@ -51,6 +77,58 @@ pub struct DisplayOptions {
     pub show_pipeline: bool,
 }
 
+#[derive(Clone, Default)]
+pub struct SearchState {
+    pub query: String,
+    pub matches: Vec<usize>,
+    pub current_match: usize,
+    pub case_sensitive: bool,
+    pub active: bool,
+    pub just_opened: bool,
+}
+
+impl SearchState {
+    pub fn clear(&mut self) {
+        self.query.clear();
+        self.matches.clear();
+        self.current_match = 0;
+        self.active = false;
+        self.just_opened = false;
+    }
+
+    pub fn next(&mut self) {
+        if !self.matches.is_empty() {
+            self.current_match = (self.current_match + 1) % self.matches.len();
+        }
+    }
+
+    pub fn prev(&mut self) {
+        if !self.matches.is_empty() {
+            self.current_match = if self.current_match == 0 {
+                self.matches.len() - 1
+            } else {
+                self.current_match - 1
+            };
+        }
+    }
+
+    // pub fn current_line_index(&self) -> Option<usize> {
+        // self.matches.get(self.current_match).copied()
+    // }
+
+    pub fn match_count(&self) -> usize {
+        self.matches.len()
+    }
+
+    pub fn current_display(&self) -> usize {
+        if self.matches.is_empty() {
+            0
+        } else {
+            self.current_match + 1
+        }
+    }
+}
+
 pub struct SessionTab {
     pub id: u64,
     pub session_config: SessionConfig,
@@ -61,10 +139,16 @@ pub struct SessionTab {
     pub plot_view: plot_view::PlotViewState,
     pub view: View,
     pub auto_reconnect: bool,
+    pub dtr: bool,
+    pub rts: bool,
     pub send_input: String,
     pub send_mode: SendMode,
-    pub append_newline: bool,
+    pub line_ending: LineEnding,
     pub send_status: Option<String>,
+    pub search: SearchState,
+    pub log_enabled: bool,
+    pub log_path: String,
+    pub log_writer: Option<LogWriter>,
 }
 
 pub struct XserialApp {
@@ -86,6 +170,8 @@ pub struct XserialApp {
     config_form: config::ConfigForm,
     event_rx: mpsc::Receiver<SessionEvent>,
     pending: Vec<SessionEvent>,
+    profiler: GuiProfiler,
+    shortcut_bindings: Vec<(shortcuts::Action, egui::KeyboardShortcut)>,
 }
 
 impl XserialApp {
@@ -94,16 +180,32 @@ impl XserialApp {
         mut rx: tokio::sync::broadcast::Receiver<SessionEvent>,
         ctx: egui::Context,
     ) -> Self {
+        let profiler = GuiProfiler::from_env();
+        let repaint_counter = profiler.repaint_counter();
         let (event_tx, event_rx) = mpsc::channel();
         let repaint_ctx = ctx.clone();
         tokio::spawn(async move {
+            let mut last_repaint = Instant::now()
+                .checked_sub(DATA_REPAINT_INTERVAL)
+                .unwrap_or_else(Instant::now);
+            let mut delayed_repaint_pending = false;
             loop {
                 match rx.recv().await {
                     Ok(event) => {
                         if event_tx.send(event).is_err() {
                             break;
                         }
+                        let elapsed = last_repaint.elapsed();
+                        if elapsed >= DATA_REPAINT_INTERVAL {
+                            repaint_counter.increment();
                             repaint_ctx.request_repaint();
+                            last_repaint = Instant::now();
+                            delayed_repaint_pending = false;
+                        } else if !delayed_repaint_pending {
+                            repaint_counter.increment();
+                            repaint_ctx.request_repaint_after(DATA_REPAINT_INTERVAL - elapsed);
+                            delayed_repaint_pending = true;
+                        }
                     }
                     Err(tokio::sync::broadcast::error::RecvError::Lagged(_)) => continue,
                     Err(tokio::sync::broadcast::error::RecvError::Closed) => break,
@@ -139,11 +241,126 @@ impl XserialApp {
             config_form: config::ConfigForm::default(),
             event_rx,
             pending: Vec::new(),
+            profiler,
+            shortcut_bindings: default_bindings(),
         };
         app.restore_saved_sessions(saved_state);
         app
     }
 
+    fn execute(&mut self, action: shortcuts::Action) {
+        use shortcuts::Action::*;
+
+        match action {
+            NextTab => {
+                if self.tabs.len() > 1 {
+                    self.active = (self.active + 1) % self.tabs.len();
+                    self.persist_gui_state();
+                }
+            }
+            PrevTab => {
+                if self.tabs.len() > 1 {
+                    self.active = if self.active == 0 {
+                        self.tabs.len() - 1
+                    } else {
+                        self.active - 1
+                    };
+                    self.persist_gui_state();
+                }
+            }
+            ViewText => {
+                if let Some(tab) = self.tabs.get_mut(self.active) {
+                    tab.view = View::Text;
+                }
+            }
+            ViewHex => {
+                if let Some(tab) = self.tabs.get_mut(self.active) {
+                    tab.view = View::Hex;
+                }
+            }
+            ViewPlot => {
+                if let Some(tab) = self.tabs.get_mut(self.active) {
+                    tab.view = View::Plot;
+                }
+            }
+            NewSession => self.open_create_config(),
+            EditSession => {
+                if let Some(tab) = self.tabs.get(self.active) {
+                    self.open_edit_config(tab.id);
+                }
+            }
+            DeleteSession => {
+                if !self.tabs.is_empty() {
+                    let id = self.tabs[self.active].id;
+                    self.manager.remove(id);
+                    self.tabs.remove(self.active);
+                    if self.active >= self.tabs.len() && !self.tabs.is_empty() {
+                        self.active = self.tabs.len() - 1;
+                    }
+                    self.persist_gui_state();
+                }
+            }
+            ToggleConnect => {
+                if let Some(tab) = self.tabs.get_mut(self.active) {
+                    let connected = matches!(
+                        tab.status,
+                        ConnectionStatus::Connected | ConnectionStatus::Connecting
+                    );
+                    if let Some(handle) = self.manager.get(tab.id) {
+                        if connected {
+                            tab.status = ConnectionStatus::Disconnected;
+                            let handle = handle.clone();
+                            tokio::spawn(async move {
+                                let _ = handle.disconnect().await;
+                            });
+                        } else {
+                            tab.status = ConnectionStatus::Connecting;
+                            let handle = handle.clone();
+                            tokio::spawn(async move {
+                                let _ = handle.connect().await;
+                            });
+                        }
+                    } else {
+                        tab.status = ConnectionStatus::Error(String::from("session not found"));
+                    }
+                }
+            }
+            Clear => {
+                if let Some(tab) = self.tabs.get_mut(self.active) {
+                    tab.console.clear();
+                    tab.hex.clear();
+                    tab.plot.clear();
+                    tab.send_status = Some(String::from("Cleared"));
+                }
+            }
+            UiSettings => self.font_settings_open = true,
+            CloseOverlay => {
+                self.config_open = false;
+                self.font_settings_open = false;
+            }
+            Search => {
+                if let Some(tab) = self.tabs.get_mut(self.active) {
+                    tab.search.active = true;
+                    tab.search.just_opened = true;
+                }
+            }
+            SearchNext => {
+                if let Some(tab) = self.tabs.get_mut(self.active)
+                    && tab.search.active
+                {
+                    tab.search.next();
+                }
+            }
+            SearchPrev => {
+                if let Some(tab) = self.tabs.get_mut(self.active)
+                    && tab.search.active
+                {
+                    tab.search.prev();
+                }
+            }
+        }
+    }
+
     fn open_create_config(&mut self) {
         self.config_target = None;
         self.config_form = config::ConfigForm::default();
@@ -151,8 +368,17 @@ impl XserialApp {
     }
 
     fn restore_saved_sessions(&mut self, saved_state: PersistedGuiState) {
-        for session_config in saved_state.sessions {
+        for (i, session_config) in saved_state.sessions.into_iter().enumerate() {
             self.add_session_tab(session_config);
+            if let Some(tab) = self.tabs.last_mut()
+                && let Some(log_cfg) = saved_state.sessions_log.get(i)
+            {
+                tab.log_enabled = log_cfg.enabled;
+                tab.log_path = log_cfg.file_path.clone();
+                if log_cfg.enabled && !log_cfg.file_path.is_empty() {
+                    tab.log_writer = LogWriter::open(&log_cfg.file_path).ok();
+                }
+            }
         }
         if !self.tabs.is_empty() {
             self.active = saved_state.active.min(self.tabs.len() - 1);
@@ -162,6 +388,10 @@ impl XserialApp {
     fn add_session_tab(&mut self, session_config: SessionConfig) {
         let history_limit = session_config.history_limit;
         let auto_reconnect = session_config.auto_reconnect;
+        let (dtr, rts) = match &session_config.transport {
+            TransportConfig::Serial { dtr, rts, .. } => (*dtr, *rts),
+            _ => (false, false),
+        };
         let handle = self.manager.create(session_config.clone());
         self.tabs.push(SessionTab {
             id: handle.id(),
@@ -173,10 +403,16 @@ impl XserialApp {
             plot_view: plot_view::PlotViewState::default(),
             view: View::Text,
             auto_reconnect,
+            dtr,
+            rts,
             send_input: String::new(),
             send_mode: SendMode::Text,
-            append_newline: true,
+            line_ending: LineEnding::None,
             send_status: None,
+            search: SearchState::default(),
+            log_enabled: false,
+            log_path: String::new(),
+            log_writer: None,
         });
     }
 
@@ -187,6 +423,14 @@ impl XserialApp {
                 .iter()
                 .map(|tab| tab.session_config.clone())
                 .collect(),
+            sessions_log: self
+                .tabs
+                .iter()
+                .map(|tab| SessionLogConfig {
+                    enabled: tab.log_enabled,
+                    file_path: tab.log_path.clone(),
+                })
+                .collect(),
             active: if self.tabs.is_empty() {
                 0
             } else {
@@ -230,11 +474,22 @@ impl XserialApp {
     }
 
     fn drain_events(&mut self) {
+        let started = Instant::now();
+        let mut stats = DrainStats {
+            drained_events: 0,
+            drained_data_events: 0,
+            drained_text_events: 0,
+            drained_hex_events: 0,
+            drained_plot_events: 0,
+            pending_events: 0,
+        };
         while let Ok(event) = self.event_rx.try_recv() {
             self.pending.push(event);
         }
+        stats.pending_events = self.pending.len();
 
         for event in self.pending.drain(..) {
+            stats.drained_events += 1;
             match event {
                 SessionEvent::Connected(id) => {
                     if let Some(tab) = self.tabs.iter_mut().find(|tab| tab.id == id) {
@@ -252,26 +507,73 @@ impl XserialApp {
                     }
                 }
                 SessionEvent::Data(id, entry) => {
+                    stats.drained_data_events += 1;
                     if let Some(tab) = self.tabs.iter_mut().find(|tab| tab.id == id) {
+                        if let Some(ref writer) = tab.log_writer
+                            && let Some(line) = logging::format_data_log(
+                                &entry,
+                                "IN",
+                                self.display.show_timestamp,
+                                self.display.show_direction,
+                                self.display.show_pipeline,
+                            )
+                        {
+                            writer.write_line(&line);
+                        }
                         match &entry.data {
-                            DecodedData::Text(_) => tab.console.push(&entry),
+                            DecodedData::Text(_) => {
-                            DecodedData::Hex(_) => tab.hex.push(&entry),
+                                stats.drained_text_events += 1;
-                            DecodedData::Plot(_) => tab.plot.push(&entry),
+                                tab.console.push(&entry);
+                            }
+                            DecodedData::Hex(_) => {
+                                stats.drained_hex_events += 1;
+                                tab.hex.push(&entry);
+                            }
+                            DecodedData::Plot(_) => {
+                                stats.drained_plot_events += 1;
+                                tab.plot.push(&entry);
+                            }
                             DecodedData::Binary(_) => {}
                         }
                     }
                 }
             }
         }
+        self.profiler.record_drain(started.elapsed(), stats);
     }
 
     fn wants_live_plot_repaint(&self) -> bool {
-        self.tabs
+        self.tabs.iter().enumerate().any(|(index, tab)| {
-            .get(self.active)
+            matches!(tab.status, ConnectionStatus::Connected)
-            .map(|tab| {
+                && (tab.plot_view.detached
-                matches!(tab.view, View::Plot) && matches!(tab.status, ConnectionStatus::Connected)
+                    || (index == self.active && matches!(tab.view, View::Plot)))
         })
-            .unwrap_or(false)
+    }
+
+    fn profiler_snapshot(&self) -> GuiSnapshot {
+        if let Some(tab) = self.tabs.get(self.active) {
+            GuiSnapshot {
+                tabs: self.tabs.len(),
+                active_view: match tab.view {
+                    View::Text => "text",
+                    View::Hex => "hex",
+                    View::Plot => "plot",
+                },
+                active_text_lines: tab.console.len(),
+                active_hex_lines: tab.hex.len(),
+                active_plot_series: tab.plot.series_len(),
+                active_plot_points: tab.plot.total_points(),
+            }
+        } else {
+            GuiSnapshot {
+                tabs: self.tabs.len(),
+                active_view: "none",
+                active_text_lines: 0,
+                active_hex_lines: 0,
+                active_plot_series: 0,
+                active_plot_points: 0,
+            }
+        }
     }
 
     fn render_config_window(&mut self, ctx: &egui::Context) {
@@ -313,6 +615,7 @@ impl XserialApp {
 
     fn render_sidebar(&mut self, ui: &mut egui::Ui) {
         let mut on_new = false;
+        let mut on_edit = None;
         let mut on_delete = None;
         let previous_active = self.active;
 
@@ -328,13 +631,26 @@ impl XserialApp {
                         transport_summary: transport_summary(&tab.session_config.transport),
                     })
                     .collect();
-                sidebar::render(ui, &sessions, &mut self.active, &mut on_new, &mut on_delete);
+                sidebar::render(
+                    ui,
+                    &sessions,
+                    &mut self.active,
+                    &mut on_new,
+                    &mut on_edit,
+                    &mut on_delete,
+                );
             });
 
         if on_new {
             self.open_create_config();
         }
 
+        if let Some(index) = on_edit
+            && let Some(tab) = self.tabs.get(index)
+        {
+            self.open_edit_config(tab.id);
+        }
+
         if let Some(index) = on_delete {
             if let Some(tab) = self.tabs.get(index) {
                 self.manager.remove(tab.id);
@@ -362,8 +678,10 @@ impl XserialApp {
 
             let manager = self.manager.clone();
             let display = &mut self.display;
-            let mut edit_session = None;
             let mut persist_state = false;
+            let mut text_render = None;
+            let mut hex_render = None;
+            let mut plot_render = None;
 
             {
                 let tab = &mut self.tabs[self.active];
@@ -392,11 +710,7 @@ impl XserialApp {
                     }
                 });
 
-                let (configure_clicked, auto_reconnect_changed) =
+                let auto_reconnect_changed = render_session_controls(ui, &manager, tab);
-                    render_session_controls(ui, &manager, tab);
-                if configure_clicked {
-                    edit_session = Some(tab.id);
-                }
                 persist_state |= auto_reconnect_changed;
 
                 let mut display_changed = false;
@@ -412,6 +726,8 @@ impl XserialApp {
                 });
                 persist_state |= display_changed;
 
+                render_search_bar(ui, tab);
+
                 if let ConnectionStatus::Error(message) = &tab.status {
                     ui.label(egui::RichText::new(message).color(Color32::RED));
                 }
@@ -431,10 +747,41 @@ impl XserialApp {
                     UiBuilder::new()
                         .max_rect(receive_rect)
                         .layout(Layout::top_down(egui::Align::Min).with_cross_justify(true)),
-                    |ui| match tab.view {
+                    |ui| {
-                        View::Text => console::render(ui, &tab.console, *display),
+                        let started = Instant::now();
-                        View::Hex => hex_view::render(ui, &tab.hex, *display),
+                        match tab.view {
-                        View::Plot => plot_view::render(ui, &tab.plot, tab.id, &mut tab.plot_view),
+                            View::Text => {
+                                let line_count = console::render(ui, &tab.console, *display, tab.search.active.then_some(&tab.search));
+                                text_render = Some((started.elapsed(), line_count));
+                            }
+                            View::Hex => {
+                                let line_count = hex_view::render(ui, &tab.hex, *display, tab.search.active.then_some(&tab.search));
+                                hex_render = Some((started.elapsed(), line_count));
+                            }
+                            View::Plot => {
+                                if tab.plot_view.detached {
+                                    ui.heading(format!(
+                                        "Plot window detached for Session {}",
+                                        tab.id
+                                    ));
+                                    ui.label("The plot is currently shown in a floating window.");
+                                    if ui.button("Dock Plot Back").clicked() {
+                                        tab.plot_view.detached = false;
+                                    }
+                                } else {
+                                    let output = plot_view::render(
+                                        ui,
+                                        &mut tab.plot,
+                                        tab.id,
+                                        &mut tab.plot_view,
+                                    );
+                                    if output.toggle_detached {
+                                        tab.plot_view.detached = true;
+                                    }
+                                    plot_render = Some((started.elapsed(), output.stats));
+                                }
+                            }
+                        }
                     },
                 );
 
@@ -446,8 +793,14 @@ impl XserialApp {
                 );
             }
 
-            if let Some(id) = edit_session {
+            if let Some((elapsed, line_count)) = text_render {
-                self.open_edit_config(id);
+                self.profiler.record_text_render(elapsed, line_count);
+            }
+            if let Some((elapsed, line_count)) = hex_render {
+                self.profiler.record_hex_render(elapsed, line_count);
+            }
+            if let Some((elapsed, stats)) = plot_render {
+                self.profiler.record_plot_render(elapsed, stats);
             }
             if persist_state {
                 self.persist_gui_state();
@@ -455,10 +808,50 @@ impl XserialApp {
         });
     }
 
+    fn render_detached_plot_windows(&mut self, ctx: &egui::Context) {
+        let mut plot_renders = Vec::new();
+
+        for tab in &mut self.tabs {
+            if !tab.plot_view.detached {
+                continue;
+            }
+
+            let mut open = true;
+            let mut output = None;
+            egui::Window::new(format!("Plot - Session {}", tab.id))
+                .open(&mut open)
+                .default_width(720.0)
+                .default_height(480.0)
+                .resizable(true)
+                .vscroll(false)
+                .show(ctx, |ui| {
+                    let started = Instant::now();
+                    let render_output =
+                        plot_view::render(ui, &mut tab.plot, tab.id, &mut tab.plot_view);
+                    output = Some((started.elapsed(), render_output));
+                });
+
+            if let Some((elapsed, render_output)) = output {
+                if render_output.toggle_detached {
+                    tab.plot_view.detached = false;
+                }
+                plot_renders.push((elapsed, render_output.stats));
+            }
+
+            if !open {
+                tab.plot_view.detached = false;
+            }
+        }
+
+        for (elapsed, stats) in plot_renders {
+            self.profiler.record_plot_render(elapsed, stats);
+        }
+    }
+
     fn render_top_bar(&mut self, ui: &mut egui::Ui) {
         Panel::top("top_bar").show_inside(ui, |ui| {
             ui.horizontal_wrapped(|ui| {
-                ui.heading("xserial");
+                ui.heading("pipeview");
                 ui.separator();
                 // ui.label(format!(
                 //     "Fonts: {} + {}  {:.1} pt",
@@ -601,6 +994,7 @@ fn transport_summary(transport: &TransportConfig) -> String {
     }
 }
 
+#[allow(clippy::too_many_arguments)]
 fn render_font_selector(
     ui: &mut egui::Ui,
     title: &str,
@@ -686,6 +1080,16 @@ impl eframe::App for XserialApp {
     fn update(&mut self, _ctx: &egui::Context, _frame: &mut eframe::Frame) {}
 
     fn ui(&mut self, ui: &mut egui::Ui, _frame: &mut eframe::Frame) {
+        {
+            let supress = ui.ctx().egui_wants_keyboard_input();
+            let actions = shortcuts::process(ui.ctx(), supress, &self.shortcut_bindings);
+
+            for action in actions {
+                self.execute(action);
+            }
+        }
+
+        let frame_started = Instant::now();
         self.drain_events();
         if self.wants_live_plot_repaint() {
             ui.ctx().request_repaint_after(Duration::from_millis(16));
@@ -695,53 +1099,108 @@ impl eframe::App for XserialApp {
         self.render_config_window(ui.ctx());
         self.render_sidebar(ui);
         self.render_main_panel(ui);
+        self.render_detached_plot_windows(ui.ctx());
+        self.profiler
+            .record_frame(frame_started.elapsed(), self.profiler_snapshot());
     }
 }
 
+fn render_search_bar(ui: &mut egui::Ui, tab: &mut SessionTab) {
+    if !tab.search.active {
+        return;
+    }
+    ui.horizontal(|ui| {
+        let response = ui.add(
+            TextEdit::singleline(&mut tab.search.query)
+                .hint_text("Search...")
+                .desired_width(200.0),
+        );
+        if tab.search.just_opened {
+            response.request_focus();
+            tab.search.just_opened = false;
+        }
+        if response.changed() {
+            let matches = match tab.view {
+                View::Text => tab.console.search(&tab.search.query, tab.search.case_sensitive),
+                View::Hex => tab.hex.search(&tab.search.query, tab.search.case_sensitive),
+                View::Plot => Vec::new(),
+            };
+            tab.search.matches = matches;
+            tab.search.current_match = 0;
+        }
+        if response.lost_focus() && ui.input(|i| i.key_pressed(egui::Key::Enter)) {
+            tab.search.next();
+        }
+
+        ui.label(format!(
+            "{}/{}",
+            tab.search.current_display(),
+            tab.search.match_count()
+        ));
+
+        if ui.button("▲").clicked() {
+            tab.search.prev();
+        }
+        if ui.button("▼").clicked() {
+            tab.search.next();
+        }
+
+        if ui.checkbox(&mut tab.search.case_sensitive, "Aa").changed() {
+            let matches = match tab.view {
+                View::Text => tab.console.search(&tab.search.query, tab.search.case_sensitive),
+                View::Hex => tab.hex.search(&tab.search.query, tab.search.case_sensitive),
+                View::Plot => Vec::new(),
+            };
+            tab.search.matches = matches;
+            tab.search.current_match = 0;
+        }
+
+        if ui.button("✕").clicked() {
+            tab.search.clear();
+        }
+    });
+}
+
 fn render_session_controls(
     ui: &mut egui::Ui,
     manager: &SessionManager,
     tab: &mut SessionTab,
-) -> (bool, bool) {
+) -> bool {
-    let mut configure_clicked = false;
     let mut auto_reconnect_changed = false;
     ui.horizontal_wrapped(|ui| {
-        if ui.button("Connect").clicked() {
+        let connected = matches!(
-            if let Some(handle) = manager.get(tab.id) {
+            tab.status,
-                tab.status = ConnectionStatus::Connecting;
+            ConnectionStatus::Connected | ConnectionStatus::Connecting
-                tokio::spawn(async move {
+        );
-                    let _ = handle.connect().await;
+        let connect_label = if connected { "Disconnect" } else { "Connect" };
-                });
+        if ui.button(connect_label).clicked() {
-            } else {
-                tab.status = ConnectionStatus::Error(String::from("session not found"));
-            }
-        }
-
-        if ui.button("Disconnect").clicked() {
             if let Some(handle) = manager.get(tab.id) {
+                if connected {
                     tab.status = ConnectionStatus::Disconnected;
                     tokio::spawn(async move {
                         let _ = handle.disconnect().await;
                     });
                 } else {
-                tab.status = ConnectionStatus::Error(String::from("session not found"));
-            }
-        }
-
-        if ui.button("Reconnect").clicked() {
-            if let Some(handle) = manager.get(tab.id) {
                     tab.status = ConnectionStatus::Connecting;
                     tokio::spawn(async move {
-                    let _ = handle.reconnect().await;
+                        let _ = handle.connect().await;
                     });
+                }
             } else {
                 tab.status = ConnectionStatus::Error(String::from("session not found"));
             }
         }
 
-        if ui.button("Configure").clicked() {
+        // if ui.button("Reconnect").clicked() {
-            configure_clicked = true;
+        //     if let Some(handle) = manager.get(tab.id) {
-        }
+        //         tab.status = ConnectionStatus::Connecting;
+        //         tokio::spawn(async move {
+        //             let _ = handle.reconnect().await;
+        //         });
+        //     } else {
+        //         tab.status = ConnectionStatus::Error(String::from("session not found"));
+        //     }
+        // }
 
         if ui.button("Clear").clicked() {
             tab.console.clear();
@@ -763,8 +1222,30 @@ fn render_session_controls(
                 tab.status = ConnectionStatus::Error(String::from("session not found"));
             }
         }
+        if matches!(tab.status, ConnectionStatus::Connected)
+            && matches!(tab.session_config.transport, TransportConfig::Serial { .. })
+        {
+            let dtr_changed = ui.checkbox(&mut tab.dtr, "DTR").changed();
+            let rts_changed = ui.checkbox(&mut tab.rts, "RTS").changed();
+            if dtr_changed || rts_changed {
+                if let Some(handle) = manager.get(tab.id) {
+                    let dtr = tab.dtr;
+                    let rts = tab.rts;
+                    tokio::spawn(async move {
+                        if dtr_changed {
+                            let _ = handle.set_dtr(dtr).await;
+                        }
+                        if rts_changed {
+                            let _ = handle.set_rts(rts).await;
+                        }
                     });
-    (configure_clicked, auto_reconnect_changed)
+                } else {
+                    tab.status = ConnectionStatus::Error(String::from("session not found"));
+                }
+            }
+        }
+    });
+    auto_reconnect_changed
 }
 
 fn render_send_panel(ui: &mut egui::Ui, manager: &SessionManager, tab: &mut SessionTab) {
@@ -774,24 +1255,77 @@ fn render_send_panel(ui: &mut egui::Ui, manager: &SessionManager, tab: &mut Sess
         ui.selectable_value(&mut tab.send_mode, SendMode::Text, "Text");
         ui.selectable_value(&mut tab.send_mode, SendMode::Hex, "Hex");
         if tab.send_mode == SendMode::Text {
-            ui.checkbox(&mut tab.append_newline, "Append newline");
+            ui.add_space(6.0);
+            egui::ComboBox::from_label("Line ending")
+                .selected_text(tab.line_ending.to_string())
+                .show_ui(ui, |ui| {
+                    ui.selectable_value(
+                        &mut tab.line_ending,
+                        LineEnding::None,
+                        LineEnding::None.to_string(),
+                    );
+                    ui.selectable_value(
+                        &mut tab.line_ending,
+                        LineEnding::LF,
+                        LineEnding::LF.to_string(),
+                    );
+                    ui.selectable_value(
+                        &mut tab.line_ending,
+                        LineEnding::CR,
+                        LineEnding::CR.to_string(),
+                    );
+                    ui.selectable_value(
+                        &mut tab.line_ending,
+                        LineEnding::CRLF,
+                        LineEnding::CRLF.to_string(),
+                    );
+                });
         }
     });
     ui.add_space(6.0);
 
+    let log_toggled = ui
+        .checkbox(&mut tab.log_enabled, "Log to file")
+        .changed();
+    if log_toggled {
+        if tab.log_enabled {
+            tab.log_path = default_log_path(tab.id)
+                .to_string_lossy()
+                .to_string();
+            tab.log_writer = LogWriter::open(&tab.log_path).ok();
+        } else {
+            tab.log_writer = None;
+        }
+    }
+    if tab.log_enabled {
+        ui.horizontal(|ui| {
+            let changed = ui
+                .text_edit_singleline(&mut tab.log_path)
+                .lost_focus();
+            if changed && !tab.log_path.is_empty() {
+                tab.log_writer = LogWriter::open(&tab.log_path).ok();
+            }
+        });
+    }
+    ui.add_space(3.0);
+
     let hint = match tab.send_mode {
-        SendMode::Text => "Enter text to send",
+        SendMode::Text => "Enter to send, Ctrl+Enter for newline",
         SendMode::Hex => "Enter hex bytes, e.g. 48 65 6C 6C 6F",
     };
     let response = ui.add(
         TextEdit::multiline(&mut tab.send_input)
             .desired_rows(6)
             .desired_width(f32::INFINITY)
+            .return_key(egui::KeyboardShortcut::new(
+                egui::Modifiers::COMMAND,
+                egui::Key::Enter,
+            ))
             .hint_text(hint),
     );
 
     let wants_submit = response.has_focus()
-        && ui.input(|input| input.key_pressed(egui::Key::Enter) && input.modifiers.command_only());
+        && ui.input(|input| input.key_pressed(egui::Key::Enter) && input.modifiers.is_none());
 
     let mut send_clicked = false;
     ui.horizontal(|ui| {
@@ -816,13 +1350,18 @@ fn render_send_panel(ui: &mut egui::Ui, manager: &SessionManager, tab: &mut Sess
             if let Some(handle) = manager.get(tab.id) {
                 match tab.send_mode {
                     SendMode::Text => {
-                        let text = if tab.append_newline {
+                        let mut text = tab.send_input.trim_end_matches('\n').to_string();
-                            tab.send_input.trim_end_matches('\n').to_string()
-                        } else {
-                            tab.send_input.clone()
-                        };
                         if !text.is_empty() {
-                            tab.console.push_outbound(text);
+                            match tab.line_ending {
+                                LineEnding::None => {}
+                                LineEnding::LF => text.push('\n'),
+                                LineEnding::CR => text.push('\r'),
+                                LineEnding::CRLF => text.push_str("\r\n"),
+                            }
+                            tab.console.push_outbound(text.clone());
+                            if let Some(ref writer) = tab.log_writer {
+                                writer.write_line(&logging::format_sent_log(&text));
+                            }
                         }
                     }
                     SendMode::Hex => {
@@ -832,7 +1371,10 @@ fn render_send_panel(ui: &mut egui::Ui, manager: &SessionManager, tab: &mut Sess
                             .collect::<Vec<_>>()
                             .join(" ");
                         if !hex.is_empty() {
-                            tab.hex.push_outbound(hex);
+                            tab.hex.push_outbound(hex.clone());
+                            if let Some(ref writer) = tab.log_writer {
+                                writer.write_line(&logging::format_sent_log(&hex));
+                            }
                         }
                     }
                 }
@@ -854,6 +1396,16 @@ fn render_send_panel(ui: &mut egui::Ui, manager: &SessionManager, tab: &mut Sess
     }
 }
 
+fn default_log_path(session_id: u64) -> PathBuf {
+    use std::time::{SystemTime, UNIX_EPOCH};
+    let dir = app_state::config_dir().join("logs");
+    let ts = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap_or_default()
+        .as_secs();
+    dir.join(format!("session_{session_id}_{ts}.log"))
+}
+
 fn build_payload(tab: &SessionTab) -> Result<Option<Vec<u8>>, String> {
     let trimmed = tab.send_input.trim();
     if trimmed.is_empty() {
@@ -862,9 +1414,12 @@ fn build_payload(tab: &SessionTab) -> Result<Option<Vec<u8>>, String> {
 
     match tab.send_mode {
         SendMode::Text => {
-            let mut text = tab.send_input.clone();
+            let mut text = tab.send_input.trim_end_matches('\n').to_string();
-            if tab.append_newline && !text.ends_with('\n') {
+            match tab.line_ending {
-                text.push('\n');
+                LineEnding::None => {}
+                LineEnding::LF => text.push('\n'),
+                LineEnding::CR => text.push('\r'),
+                LineEnding::CRLF => text.push_str("\r\n"),
             }
             Ok(Some(text.into_bytes()))
         }
@@ -883,8 +1438,8 @@ fn build_payload(tab: &SessionTab) -> Result<Option<Vec<u8>>, String> {
 #[cfg(test)]
 mod tests {
     use super::transport_summary;
-    use xserial_core::transport::TransportConfig;
+    use pipeview_core::transport::TransportConfig;
-    use xserial_core::transport::serial::{
+    use pipeview_core::transport::serial::{
         SerialDataBits, SerialFlowControl, SerialParity, SerialStopBits,
     };
 
@@ -905,6 +1460,8 @@ mod tests {
                 parity: SerialParity::None,
                 stop_bits: SerialStopBits::One,
                 flow_control: SerialFlowControl::None,
+                dtr: false,
+                rts: false,
             }),
             "Serial COM7"
         );

crates/pipeview-gui/src/app_state.rs

@@ -3,17 +3,27 @@ use std::fs;
 use std::io;
 use std::path::{Path, PathBuf};
 
+use pipeview_client::config::SessionConfig;
 use serde::{Deserialize, Serialize};
 use tracing::warn;
-use xserial_client::config::SessionConfig;
 
 const GUI_STATE_FILE_NAME: &str = "gui-state.json";
 
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct SessionLogConfig {
+    #[serde(default)]
+    pub enabled: bool,
+    #[serde(default)]
+    pub file_path: String,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct PersistedGuiState {
     #[serde(default)]
     pub sessions: Vec<SessionConfig>,
     #[serde(default)]
+    pub sessions_log: Vec<SessionLogConfig>,
+    #[serde(default)]
     pub active: usize,
     #[serde(default = "default_true")]
     pub show_timestamp: bool,
@@ -44,17 +54,25 @@ fn gui_state_path() -> PathBuf {
     gui_state_path_for_os_and_env(env::consts::OS, |key| env::var(key).ok())
 }
 
+/// Returns the pipeview configuration directory (the parent of gui-state.json).
+pub fn config_dir() -> PathBuf {
+    gui_state_path()
+        .parent()
+        .map(Path::to_path_buf)
+        .unwrap_or_else(|| PathBuf::from("."))
+}
+
 fn gui_state_path_for_os_and_env(os: &str, get_env: impl Fn(&str) -> Option<String>) -> PathBuf {
     match os {
         "windows" => {
             if let Some(path) = get_env("APPDATA").filter(|path| !path.trim().is_empty()) {
                 return PathBuf::from(path)
-                    .join("xserial")
+                    .join("pipeview")
                     .join(GUI_STATE_FILE_NAME);
             }
             if let Some(path) = get_env("LOCALAPPDATA").filter(|path| !path.trim().is_empty()) {
                 return PathBuf::from(path)
-                    .join("xserial")
+                    .join("pipeview")
                     .join(GUI_STATE_FILE_NAME);
             }
         }
@@ -63,20 +81,20 @@ fn gui_state_path_for_os_and_env(os: &str, get_env: impl Fn(&str) -> Option<Stri
                 return PathBuf::from(home)
                     .join("Library")
                     .join("Application Support")
-                    .join("xserial")
+                    .join("pipeview")
                     .join(GUI_STATE_FILE_NAME);
             }
         }
         _ => {
             if let Some(path) = get_env("XDG_CONFIG_HOME").filter(|path| !path.trim().is_empty()) {
                 return PathBuf::from(path)
-                    .join("xserial")
+                    .join("pipeview")
                     .join(GUI_STATE_FILE_NAME);
             }
             if let Some(home) = get_env("HOME").filter(|path| !path.trim().is_empty()) {
                 return PathBuf::from(home)
                     .join(".config")
-                    .join("xserial")
+                    .join("pipeview")
                     .join(GUI_STATE_FILE_NAME);
             }
         }
@@ -105,8 +123,8 @@ const fn default_true() -> bool {
 #[cfg(test)]
 mod tests {
     use super::*;
+    use pipeview_core::transport::TransportConfig;
     use std::time::{SystemTime, UNIX_EPOCH};
-    use xserial_core::transport::TransportConfig;
 
     #[test]
     fn windows_gui_state_path_uses_appdata() {
@@ -117,7 +135,7 @@ mod tests {
         assert_eq!(
             path,
             PathBuf::from(r"C:\Users\Test\AppData\Roaming")
-                .join("xserial")
+                .join("pipeview")
                 .join(GUI_STATE_FILE_NAME)
         );
     }
@@ -128,7 +146,7 @@ mod tests {
             .duration_since(UNIX_EPOCH)
             .unwrap()
             .as_nanos();
-        let dir = env::temp_dir().join(format!("xserial-gui-state-{unique}"));
+        let dir = env::temp_dir().join(format!("pipeview-gui-state-{unique}"));
         let path = dir.join(GUI_STATE_FILE_NAME);
         let state = PersistedGuiState {
             sessions: vec![SessionConfig {
@@ -137,6 +155,7 @@ mod tests {
                 },
                 ..SessionConfig::default()
             }],
+            sessions_log: vec![SessionLogConfig::default()],
             active: 0,
             show_timestamp: false,
             show_direction: true,

crates/pipeview-gui/src/buffers.rs

@@ -1,9 +1,10 @@
+use egui_plot::PlotBounds;
+use pipeview_client::RingBuffer;
+use pipeview_client::event::DecodedEntry;
+use pipeview_core::protocol::DecodedData;
+use pipeview_core::protocol::plot::{PlotFormat, PlotFrame};
 use std::collections::VecDeque;
 use std::time::{Duration, Instant};
-use xserial_client::RingBuffer;
-use xserial_client::event::DecodedEntry;
-use xserial_core::protocol::DecodedData;
-use xserial_core::protocol::plot::{PlotFormat, PlotFrame};
 
 #[derive(Clone)]
 pub enum LineDirection {
@@ -51,8 +52,12 @@ impl TextBuffer {
         });
     }
 
-    pub fn iter(&self) -> impl Iterator<Item = &ConsoleLine> {
+    pub fn get(&self, index: usize) -> Option<&ConsoleLine> {
-        self.lines.iter()
+        self.lines.get(index)
+    }
+
+    pub fn len(&self) -> usize {
+        self.lines.len()
     }
 
     pub fn clear(&mut self) {
@@ -62,6 +67,32 @@ impl TextBuffer {
     pub fn set_limit(&mut self, limit: usize) {
         self.lines.set_limit(limit);
     }
+
+    // pub fn iter(&self) -> impl Iterator<Item = &ConsoleLine> {
+    //     (0..self.lines.len()).filter_map(|i| self.lines.get(i))
+    // }
+
+    pub fn search(&self, query: &str, case_sensitive: bool) -> Vec<usize> {
+        if query.is_empty() {
+            return Vec::new();
+        }
+        let query_lower = if case_sensitive {
+            String::new()
+        } else {
+            query.to_lowercase()
+        };
+        (0..self.lines.len())
+            .filter(|&i| {
+                self.lines.get(i).is_some_and(|line| {
+                    if case_sensitive {
+                        line.text.contains(query)
+                    } else {
+                        line.text.to_lowercase().contains(&query_lower)
+                    }
+                })
+            })
+            .collect()
+    }
 }
 
 #[derive(Clone)]
@@ -135,8 +166,12 @@ impl HexBuffer {
         });
     }
 
-    pub fn iter(&self) -> impl Iterator<Item = &HexLine> {
+    pub fn get(&self, index: usize) -> Option<&HexLine> {
-        self.lines.iter()
+        self.lines.get(index)
+    }
+
+    pub fn len(&self) -> usize {
+        self.lines.len()
     }
 
     pub fn clear(&mut self) {
@@ -146,6 +181,33 @@ impl HexBuffer {
     pub fn set_limit(&mut self, limit: usize) {
         self.lines.set_limit(limit);
     }
+
+    // pub fn iter(&self) -> impl Iterator<Item = &HexLine> {
+    //     (0..self.lines.len()).filter_map(|i| self.lines.get(i))
+    // }
+
+    pub fn search(&self, query: &str, case_sensitive: bool) -> Vec<usize> {
+        if query.is_empty() {
+            return Vec::new();
+        }
+        let query_lower = if case_sensitive {
+            String::new()
+        } else {
+            query.to_lowercase()
+        };
+        (0..self.lines.len())
+            .filter(|&i| {
+                self.lines.get(i).is_some_and(|line| {
+                    if case_sensitive {
+                        line.hex.contains(query) || line.ascii.contains(query)
+                    } else {
+                        line.hex.to_lowercase().contains(&query_lower)
+                            || line.ascii.to_lowercase().contains(&query_lower)
+                    }
+                })
+            })
+            .collect()
+    }
 }
 
 pub struct PlotSeries {
@@ -168,11 +230,17 @@ impl PlotSeries {
             if !sample.is_finite() {
                 continue;
             }
-            self.points.push_back([self.next_x, *sample]);
+            self.push_point([self.next_x, *sample], limit);
             self.next_x += 1.0;
         }
-        while self.points.len() > limit {
+    }
-            self.points.pop_front();
+
+    fn push_point(&mut self, point: [f64; 2], limit: usize) -> Option<[f64; 2]> {
+        self.points.push_back(point);
+        if self.points.len() > limit {
+            self.points.pop_front()
+        } else {
+            None
         }
     }
 
@@ -180,26 +248,56 @@ impl PlotSeries {
         self.points.iter().copied()
     }
 
-    pub fn render_points_time_series(&self, x_min: f64, x_max: f64, max_points: usize) -> Vec<[f64; 2]> {
+    pub fn len(&self) -> usize {
+        self.points.len()
+    }
+
+    fn first_point(&self) -> Option<[f64; 2]> {
+        self.points.front().copied()
+    }
+
+    fn last_point(&self) -> Option<[f64; 2]> {
+        self.points.back().copied()
+    }
+
+    pub fn render_points_time_series(
+        &self,
+        x_min: f64,
+        x_max: f64,
+        max_points: usize,
+    ) -> Vec<[f64; 2]> {
         if self.points.is_empty() || max_points == 0 {
             return Vec::new();
         }
 
-        let visible: Vec<[f64; 2]> = self
+        let mut exact_visible = Vec::with_capacity(max_points.min(self.points.len()));
-            .points
+        for point in self.points.iter().copied() {
-            .iter()
+            if point[0] < x_min {
-            .copied()
+                continue;
-            .filter(|point| point[0] >= x_min && point[0] <= x_max)
+            }
-            .collect();
+            if point[0] > x_max {
-        if visible.len() <= max_points {
+                break;
-            return visible;
+            }
+            exact_visible.push(point);
+            if exact_visible.len() > max_points {
+                exact_visible.clear();
+                break;
+            }
+        }
+        if !exact_visible.is_empty() {
+            return exact_visible;
         }
 
         let bucket_count = (max_points / 2).max(1);
         let width = (x_max - x_min).max(1.0);
         let bucket_width = width / bucket_count as f64;
         let mut rendered = Vec::with_capacity(bucket_count * 2);
-        let mut start = 0usize;
+        let mut points = self
+            .points
+            .iter()
+            .copied()
+            .skip_while(|point| point[0] < x_min)
+            .peekable();
 
         for bucket_index in 0..bucket_count {
             let bucket_start = x_min + bucket_width * bucket_index as f64;
@@ -212,8 +310,7 @@ impl PlotSeries {
             let mut min_point: Option<[f64; 2]> = None;
             let mut max_point: Option<[f64; 2]> = None;
 
-            while start < visible.len() {
+            while let Some(point) = points.peek().copied() {
-                let point = visible[start];
                 if point[0] > bucket_end {
                     break;
                 }
@@ -227,7 +324,7 @@ impl PlotSeries {
                         _ => max_point = Some(point),
                     }
                 }
-                start += 1;
+                points.next();
             }
 
             match (min_point, max_point) {
@@ -274,10 +371,69 @@ pub enum PlotSeriesKind {
     XY,
 }
 
+#[derive(Clone, Copy)]
+struct BoundsRect {
+    min_x: f64,
+    max_x: f64,
+    min_y: f64,
+    max_y: f64,
+}
+
+impl BoundsRect {
+    fn from_point([x, y]: [f64; 2]) -> Option<Self> {
+        if !(x.is_finite() && y.is_finite()) {
+            return None;
+        }
+        Some(Self {
+            min_x: x,
+            max_x: x,
+            min_y: y,
+            max_y: y,
+        })
+    }
+
+    fn extend_with_point(&mut self, [x, y]: [f64; 2]) {
+        if !(x.is_finite() && y.is_finite()) {
+            return;
+        }
+        self.min_x = self.min_x.min(x);
+        self.max_x = self.max_x.max(x);
+        self.min_y = self.min_y.min(y);
+        self.max_y = self.max_y.max(y);
+    }
+
+    fn touches(&self, [x, y]: [f64; 2]) -> bool {
+        x == self.min_x || x == self.max_x || y == self.min_y || y == self.max_y
+    }
+
+    fn into_plot_bounds(self) -> PlotBounds {
+        let mut bounds =
+            PlotBounds::from_min_max([self.min_x, self.min_y], [self.max_x, self.max_y]);
+
+        if bounds.width() <= 0.0 {
+            bounds.set_x_center_width(bounds.center().x, 1.0);
+        } else {
+            bounds.expand_x(bounds.width() * 0.05);
+        }
+
+        if bounds.height() <= 0.0 {
+            bounds.set_y_center_height(bounds.center().y, 1.0);
+        } else {
+            bounds.expand_y(bounds.height() * 0.1);
+        }
+
+        bounds
+    }
+}
+
 pub struct PlotBuffer {
     limit: usize,
     kind: PlotSeriesKind,
     series: Vec<PlotSeries>,
+    time_series_y_bounds: Option<(f64, f64)>,
+    time_series_y_dirty: bool,
+    xy_bounds: Option<BoundsRect>,
+    xy_bounds_dirty: bool,
 }
 
 impl PlotBuffer {
@@ -286,6 +442,10 @@ impl PlotBuffer {
             limit,
             kind: PlotSeriesKind::TimeSeries,
             series: Vec::new(),
+            time_series_y_bounds: None,
+            time_series_y_dirty: false,
+            xy_bounds: None,
+            xy_bounds_dirty: false,
         }
     }
 
@@ -296,10 +456,18 @@ impl PlotBuffer {
     }
 
     fn push_frame(&mut self, pipeline_name: &str, frame: &PlotFrame) {
-        self.kind = match frame.format {
+        let next_kind = match frame.format {
             PlotFormat::XY => PlotSeriesKind::XY,
             PlotFormat::Interleaved | PlotFormat::Block => PlotSeriesKind::TimeSeries,
         };
+        if !matches!(
+            (&self.kind, &next_kind),
+            (PlotSeriesKind::TimeSeries, PlotSeriesKind::TimeSeries)
+                | (PlotSeriesKind::XY, PlotSeriesKind::XY)
+        ) {
+            self.invalidate_bounds();
+        }
+        self.kind = next_kind;
 
         if matches!(frame.format, PlotFormat::XY) {
             self.push_xy_frame(pipeline_name, frame);
@@ -313,15 +481,33 @@ impl PlotBuffer {
                 format!("{pipeline_name}:ch{}", index + 1)
             };
 
-            if let Some(series) = self
+            if let Some(series_index) = self
                 .series
-                .iter_mut()
+                .iter()
-                .find(|series| series.name == series_name)
+                .position(|series| series.name == series_name)
             {
-                series.push_samples(channel, self.limit);
+                for sample in channel {
+                    if !sample.is_finite() {
+                        continue;
+                    }
+                    let (point, removed) = {
+                        let series = &mut self.series[series_index];
+                        let point = [series.next_x, *sample];
+                        let removed = series.push_point(point, self.limit);
+                        series.next_x += 1.0;
+                        (point, removed)
+                    };
+                    if let Some(removed) = removed {
+                        self.note_time_series_removed(removed);
+                    }
+                    self.note_time_series_point(point);
+                }
             } else {
                 let mut series = PlotSeries::new(series_name);
                 series.push_samples(channel, self.limit);
+                for point in series.points() {
+                    self.note_time_series_point(point);
+                }
                 self.series.push(series);
             }
         }
@@ -337,30 +523,36 @@ impl PlotBuffer {
         let len = x.len().min(y.len());
         let series_name = format!("{pipeline_name}:xy");
 
-        let series = if let Some(series) = self
+        let series_index = if let Some(index) = self
             .series
-            .iter_mut()
+            .iter()
-            .find(|series| series.name == series_name)
+            .position(|series| series.name == series_name)
         {
-            series
+            index
         } else {
             self.series.push(PlotSeries::new(series_name));
-            self.series.last_mut().expect("just pushed")
+            self.series.len() - 1
         };
 
         for index in 0..len {
             if !x[index].is_finite() || !y[index].is_finite() {
                 continue;
             }
-            series.points.push_back([x[index], y[index]]);
+            let point = [x[index], y[index]];
+            let removed = {
+                let series = &mut self.series[series_index];
+                series.push_point(point, self.limit)
+            };
+            if let Some(removed) = removed {
+                self.note_xy_removed(removed);
             }
-        while series.points.len() > self.limit {
+            self.note_xy_point(point);
-            series.points.pop_front();
         }
     }
 
     pub fn clear(&mut self) {
         self.series.clear();
+        self.invalidate_bounds();
     }
 
     pub fn set_limit(&mut self, limit: usize) {
@@ -370,6 +562,7 @@ impl PlotBuffer {
                 series.points.pop_front();
             }
         }
+        self.invalidate_bounds();
     }
 
     pub fn is_empty(&self) -> bool {
@@ -383,14 +576,149 @@ impl PlotBuffer {
     pub fn iter(&self) -> impl Iterator<Item = &PlotSeries> {
         self.series.iter()
     }
+
+    pub fn series_len(&self) -> usize {
+        self.series.len()
+    }
+
+    pub fn total_points(&self) -> usize {
+        self.series.iter().map(PlotSeries::len).sum()
+    }
+
+    pub fn plot_bounds(&mut self) -> Option<PlotBounds> {
+        match self.kind {
+            PlotSeriesKind::TimeSeries => self.time_series_plot_bounds(),
+            PlotSeriesKind::XY => self.xy_plot_bounds(),
+        }
+    }
+
+    fn invalidate_bounds(&mut self) {
+        self.time_series_y_bounds = None;
+        self.time_series_y_dirty = false;
+        self.xy_bounds = None;
+        self.xy_bounds_dirty = false;
+    }
+
+    fn note_time_series_point(&mut self, point: [f64; 2]) {
+        if !point[1].is_finite() {
+            return;
+        }
+        match &mut self.time_series_y_bounds {
+            Some((min_y, max_y)) => {
+                *min_y = min_y.min(point[1]);
+                *max_y = max_y.max(point[1]);
+            }
+            None => self.time_series_y_bounds = Some((point[1], point[1])),
+        }
+    }
+
+    fn note_time_series_removed(&mut self, removed: [f64; 2]) {
+        if let Some((min_y, max_y)) = self.time_series_y_bounds
+            && (removed[1] == min_y || removed[1] == max_y)
+        {
+            self.time_series_y_dirty = true;
+        }
+    }
+
+    fn note_xy_point(&mut self, point: [f64; 2]) {
+        match &mut self.xy_bounds {
+            Some(bounds) => bounds.extend_with_point(point),
+            None => self.xy_bounds = BoundsRect::from_point(point),
+        }
+    }
+
+    fn note_xy_removed(&mut self, removed: [f64; 2]) {
+        if let Some(bounds) = self.xy_bounds
+            && bounds.touches(removed)
+        {
+            self.xy_bounds_dirty = true;
+        }
+    }
+
+    fn time_series_plot_bounds(&mut self) -> Option<PlotBounds> {
+        let mut min_x = f64::INFINITY;
+        let mut max_x = f64::NEG_INFINITY;
+
+        for series in &self.series {
+            if let Some([x, _]) = series.first_point() {
+                min_x = min_x.min(x);
+            }
+            if let Some([x, _]) = series.last_point() {
+                max_x = max_x.max(x);
+            }
+        }
+
+        if !(min_x.is_finite() && max_x.is_finite()) {
+            return None;
+        }
+
+        if self.time_series_y_dirty {
+            self.recompute_time_series_y_bounds();
+        }
+        let (min_y, max_y) = self.time_series_y_bounds?;
+
+        Some(
+            BoundsRect {
+                min_x,
+                max_x,
+                min_y,
+                max_y,
+            }
+            .into_plot_bounds(),
+        )
+    }
+
+    fn xy_plot_bounds(&mut self) -> Option<PlotBounds> {
+        if self.xy_bounds_dirty {
+            self.recompute_xy_bounds();
+        }
+        self.xy_bounds.map(BoundsRect::into_plot_bounds)
+    }
+
+    fn recompute_time_series_y_bounds(&mut self) {
+        let mut min_y = f64::INFINITY;
+        let mut max_y = f64::NEG_INFINITY;
+
+        for series in &self.series {
+            for [_, y] in series.points() {
+                if y.is_finite() {
+                    min_y = min_y.min(y);
+                    max_y = max_y.max(y);
+                }
+            }
+        }
+
+        self.time_series_y_bounds = if min_y.is_finite() && max_y.is_finite() {
+            Some((min_y, max_y))
+        } else {
+            None
+        };
+        self.time_series_y_dirty = false;
+    }
+
+    fn recompute_xy_bounds(&mut self) {
+        let mut bounds: Option<BoundsRect> = None;
+
+        for series in &self.series {
+            for point in series.points() {
+                match &mut bounds {
+                    Some(existing) => existing.extend_with_point(point),
+                    None => bounds = BoundsRect::from_point(point),
+                }
+            }
+        }
+
+        self.xy_bounds = bounds;
+        self.xy_bounds_dirty = false;
+    }
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
-    use xserial_client::event::DecodedEntry;
+    use pipeview_client::event::DecodedEntry;
-    use xserial_core::protocol::DecodedData;
+    use pipeview_core::protocol::DecodedData;
-    use xserial_core::protocol::plot::{PlotFrame, SampleType};
+    use pipeview_core::protocol::plot::{PlotFrame, SampleType};
 
     fn plot_entry() -> DecodedEntry {
         DecodedEntry {
@@ -459,7 +787,11 @@ mod tests {
         let rendered = series.render_points_time_series(0.0, 99.0, 16);
         assert!(!rendered.is_empty());
         assert!(rendered.len() <= 16);
-        assert!(rendered.iter().all(|point| point[0] >= 0.0 && point[0] <= 99.0));
+        assert!(
+            rendered
+                .iter()
+                .all(|point| point[0] >= 0.0 && point[0] <= 99.0)
+        );
     }
 
     #[test]

crates/pipeview-gui/src/logging.rs

@@ -0,0 +1,109 @@
+use std::fs::{self, OpenOptions};
+use std::io::{BufWriter, Write};
+use std::path::PathBuf;
+use std::sync::mpsc;
+use std::thread;
+
+use std::time::{SystemTime, UNIX_EPOCH};
+
+use pipeview_client::event::DecodedEntry;
+use pipeview_core::protocol::DecodedData;
+
+/// Manages background file logging via a dedicated writer thread.
+///
+/// Lines are sent through an mpsc channel to a background thread that
+/// appends to the log file using buffered I/O, keeping the GUI thread
+/// non-blocking.
+pub struct LogWriter {
+    sender: mpsc::Sender<String>,
+}
+
+impl LogWriter {
+    /// Spawns a background thread that opens `path` in append mode and
+    /// writes every line it receives through the returned `LogWriter`.
+    pub fn open(path: impl Into<PathBuf>) -> std::io::Result<Self> {
+        let path: PathBuf = path.into();
+        if let Some(parent) = path.parent() {
+            fs::create_dir_all(parent)?;
+        }
+        let file = OpenOptions::new().create(true).append(true).open(&path)?;
+        let mut writer = BufWriter::with_capacity(1024, file);
+        let (sender, receiver) = mpsc::channel::<String>();
+
+        let thread_name = format!("pipeview-log-{}", path.display());
+        thread::Builder::new().name(thread_name).spawn(move || {
+            while let Ok(line) = receiver.recv() {
+                if writeln!(writer, "{line}").is_err() {
+                    break;
+                }
+            }
+            let _ = writer.flush();
+        })?;
+
+        Ok(Self { sender })
+    }
+
+    /// Send a line to the background writer. Non-blocking — drops the line
+    /// silently if the writer thread has stopped.
+    pub fn write_line(&self, line: &str) {
+        let _ = self.sender.send(line.to_owned());
+    }
+}
+
+impl Drop for LogWriter {
+    fn drop(&mut self) {
+        // Sender is dropped here, which causes the background thread's
+        // receiver.recv() to return Err, triggering flush + exit.
+    }
+}
+
+/// Format a [`DecodedEntry`] into a log line.
+///
+/// Format: `[HH:MM:SS.mmm] [IN] [pipeline] payload`
+///
+/// Returns `None` for Binary and Plot entries (not meaningful as text logs).
+pub fn format_data_log(
+    entry: &DecodedEntry,
+    direction: &str,
+    show_timestamp: bool,
+    show_direction: bool,
+    show_pipeline: bool,
+) -> Option<String> {
+    let data = match &entry.data {
+        DecodedData::Text(text) => text.clone(),
+        DecodedData::Hex(hex) => hex.clone(),
+        DecodedData::Binary(_) | DecodedData::Plot(_) => return None,
+    };
+
+    let mut parts = Vec::with_capacity(4);
+    if show_timestamp {
+        parts.push(utc_timestamp());
+    }
+    if show_direction {
+        parts.push(format!("[{direction}]"));
+    }
+    if show_pipeline {
+        parts.push(format!("[{}]", entry.pipeline_name));
+    }
+    parts.push(data);
+
+    Some(parts.join(" "))
+}
+
+/// Format a sent text string into a log line (no `DecodedEntry` available
+/// for outbound data).
+pub fn format_sent_log(text: &str) -> String {
+    format!("{} [OUT] {text}", utc_timestamp())
+}
+
+fn utc_timestamp() -> String {
+    let since_epoch = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap_or_default();
+    let secs = since_epoch.as_secs();
+    let ms = since_epoch.subsec_millis();
+    let h = (secs / 3600) % 24;
+    let m = (secs / 60) % 60;
+    let s = secs % 60;
+    format!("{h:02}:{m:02}:{s:02}.{ms:03}")
+}

crates/pipeview-gui/src/main.rs

@@ -0,0 +1,65 @@
+#![cfg_attr(windows, windows_subsystem = "windows")]
+
+mod ansi_render;
+mod app;
+mod app_state;
+mod buffers;
+mod logging;
+mod panels;
+mod perf;
+mod shortcuts;
+mod ui_fonts;
+
+use pipeview_client::SessionManager;
+
+/// On Linux, when launched from a file manager, a terminal emulator may be spawned
+/// to run this binary. We re-spawn ourselves detached so the terminal can close
+/// while the GUI window persists.
+#[cfg(target_os = "linux")]
+fn ensure_detached() {
+    use std::os::unix::process::CommandExt;
+    use std::process;
+
+    if std::env::var("PIPEVIEW_DETACHED").is_ok() {
+        return;
+    }
+
+    let exe = match std::env::current_exe() {
+        Ok(p) => p,
+        Err(_) => return,
+    };
+
+    let args: Vec<String> = std::env::args().skip(1).collect();
+
+    let _ = process::Command::new(&exe)
+        .args(&args)
+        .env("PIPEVIEW_DETACHED", "1")
+        .stdin(process::Stdio::null())
+        .stdout(process::Stdio::null())
+        .stderr(process::Stdio::null())
+        .process_group(0)
+        .spawn();
+
+    process::exit(0);
+}
+
+fn main() {
+    #[cfg(target_os = "linux")]
+    ensure_detached();
+
+    tracing_subscriber::fmt()
+        .with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
+        .init();
+
+    let rt = tokio::runtime::Runtime::new().expect("tokio runtime");
+    let _guard = rt.enter();
+
+    let mgr = SessionManager::new();
+    let rx = mgr.subscribe();
+
+    let _ = eframe::run_native(
+        "pipeview",
+        eframe::NativeOptions::default(),
+        Box::new(|cc| Ok(Box::new(app::XserialApp::new(mgr, rx, cc.egui_ctx.clone())))),
+    );
+}

crates/pipeview-gui/src/panels/config.rs

@@ -1,11 +1,11 @@
 use egui::{ComboBox, DragValue, ScrollArea, TextEdit, Ui};
-use xserial_client::config::{DecoderConfig, FramerConfig, PipelineConfig, SessionConfig};
+use pipeview_client::config::{DecoderConfig, FramerConfig, PipelineConfig, SessionConfig};
-use xserial_core::protocol::Endian;
+use pipeview_core::protocol::Endian;
-use xserial_core::protocol::plot::{PlotFormat, SampleType};
+use pipeview_core::protocol::plot::{PlotFormat, SampleType};
-use xserial_core::protocol::text::TextEncoding;
+use pipeview_core::protocol::text::TextEncoding;
-use xserial_core::transport::TransportConfig;
+use pipeview_core::transport::TransportConfig;
-use xserial_core::transport::serial::{
+use pipeview_core::transport::serial::{
-    SerialDataBits, SerialFlowControl, SerialParity, SerialStopBits,
+    SerialDataBits, SerialFlowControl, SerialParity, SerialStopBits, SerialTransport,
 };
 
 #[derive(Clone)]
@@ -17,6 +17,8 @@ pub struct ConfigForm {
     pub serial_parity: SerialParity,
     pub serial_stop_bits: SerialStopBits,
     pub serial_flow_control: SerialFlowControl,
+    pub serial_dtr: bool,
+    pub serial_rts: bool,
     pub addr: String,
     pub udp_bind: String,
     pub udp_remote: String,
@@ -42,6 +44,7 @@ pub struct PipelineForm {
     pub mixed_strip_cr: bool,
     pub mixed_max_line_len: usize,
     pub mixed_max_plot_frame: usize,
+    pub lua_framer_script_path: String,
     pub hex_uppercase: bool,
     pub hex_separator: String,
     pub hex_bytes_per_group: usize,
@@ -50,6 +53,7 @@ pub struct PipelineForm {
     pub plot_channels: usize,
     pub plot_endian: Endian,
     pub plot_format: PlotFormat,
+    pub lua_decoder_script_path: String,
 }
 
 #[derive(Clone, Copy, PartialEq, Eq)]
@@ -66,6 +70,7 @@ pub enum FramerChoice {
     Length,
     Cobs,
     MixedTextPlot,
+    Lua,
 }
 
 #[derive(Clone, Copy, PartialEq, Eq)]
@@ -74,6 +79,7 @@ pub enum DecoderChoice {
     Hex,
     Plot,
     MixedTextPlot,
+    Lua,
 }
 
 impl PipelineForm {
@@ -94,6 +100,7 @@ impl PipelineForm {
             mixed_strip_cr: true,
             mixed_max_line_len: 1_048_576,
             mixed_max_plot_frame: 1_048_576,
+            lua_framer_script_path: String::new(),
             hex_uppercase: false,
             hex_separator: String::from(" "),
             hex_bytes_per_group: 1,
@@ -102,6 +109,7 @@ impl PipelineForm {
             plot_channels: 1,
             plot_endian: Endian::Little,
             plot_format: PlotFormat::Interleaved,
+            lua_decoder_script_path: String::new(),
         }
     }
 }
@@ -116,6 +124,8 @@ impl Default for ConfigForm {
             serial_parity: SerialParity::None,
             serial_stop_bits: SerialStopBits::One,
             serial_flow_control: SerialFlowControl::None,
+            serial_dtr: false,
+            serial_rts: false,
             addr: String::from("127.0.0.1:8080"),
             udp_bind: String::from("0.0.0.0:9000"),
             udp_remote: String::new(),
@@ -158,6 +168,14 @@ impl ConfigForm {
                 TransportConfig::Serial { flow_control, .. } => *flow_control,
                 _ => SerialFlowControl::None,
             },
+            serial_dtr: match &config.transport {
+                TransportConfig::Serial { dtr, .. } => *dtr,
+                _ => false,
+            },
+            serial_rts: match &config.transport {
+                TransportConfig::Serial { rts, .. } => *rts,
+                _ => false,
+            },
             addr: match &config.transport {
                 TransportConfig::Tcp { addr } => addr.clone(),
                 _ => String::from("127.0.0.1:8080"),
@@ -190,6 +208,8 @@ impl ConfigForm {
                     parity: self.serial_parity,
                     stop_bits: self.serial_stop_bits,
                     flow_control: self.serial_flow_control,
+                    dtr: self.serial_dtr,
+                    rts: self.serial_rts,
                 },
                 TransportChoice::Tcp => TransportConfig::Tcp {
                     addr: self.addr.clone(),
@@ -257,6 +277,10 @@ impl PipelineForm {
                 form.mixed_max_line_len = *max_line_len;
                 form.mixed_max_plot_frame = *max_plot_frame;
             }
+            FramerConfig::Lua { script_path } => {
+                form.framer = FramerChoice::Lua;
+                form.lua_framer_script_path = script_path.clone();
+            }
         }
 
         match &config.decoder {
@@ -292,6 +316,10 @@ impl PipelineForm {
                 form.decoder = DecoderChoice::MixedTextPlot;
                 form.text_encoding = *encoding;
             }
+            DecoderConfig::Lua { script_path } => {
+                form.decoder = DecoderChoice::Lua;
+                form.lua_decoder_script_path = script_path.clone();
+            }
         }
 
         form
@@ -322,6 +350,9 @@ impl PipelineForm {
                     max_line_len: self.mixed_max_line_len,
                     max_plot_frame: self.mixed_max_plot_frame,
                 },
+                FramerChoice::Lua => FramerConfig::Lua {
+                    script_path: self.lua_framer_script_path.clone(),
+                },
             },
             decoder: match self.decoder {
                 DecoderChoice::Text => DecoderConfig::Text {
@@ -342,6 +373,9 @@ impl PipelineForm {
                 DecoderChoice::MixedTextPlot => DecoderConfig::MixedTextPlot {
                     encoding: self.text_encoding,
                 },
+                DecoderChoice::Lua => DecoderConfig::Lua {
+                    script_path: self.lua_decoder_script_path.clone(),
+                },
             },
         }
     }
@@ -411,10 +445,7 @@ fn render_transport_section(ui: &mut Ui, form: &mut ConfigForm) {
 
     match form.transport {
         TransportChoice::Serial => {
-            ui.horizontal(|ui| {
+            render_serial_port_combo(ui, form);
-                ui.label("Port:");
-                ui.text_edit_singleline(&mut form.port);
-            });
             ui.horizontal(|ui| {
                 ui.label("Baud:");
                 ui.add(DragValue::new(&mut form.baud).range(300..=12_000_000));
@@ -487,6 +518,8 @@ fn render_transport_section(ui: &mut Ui, form: &mut ConfigForm) {
                         );
                     });
             });
+            ui.checkbox(&mut form.serial_dtr, "DTR");
+            ui.checkbox(&mut form.serial_rts, "RTS");
         }
         TransportChoice::Tcp => {
             ui.horizontal(|ui| {
@@ -507,6 +540,62 @@ fn render_transport_section(ui: &mut Ui, form: &mut ConfigForm) {
     }
 }
 
+fn render_serial_port_combo(ui: &mut Ui, form: &mut ConfigForm) {
+    let available_ports = available_serial_ports();
+    let selected_text = selected_serial_port_text(&form.port, &available_ports);
+
+    ui.horizontal(|ui| {
+        ui.label("Port:");
+        ComboBox::from_id_salt("serial_port")
+            .width(180.0)
+            .selected_text(selected_text)
+            .show_ui(ui, |ui| {
+                if available_ports.is_empty() {
+                    ui.add_enabled(false, egui::Label::new("No serial ports found"));
+                } else {
+                    for port in &available_ports {
+                        ui.selectable_value(&mut form.port, port.clone(), port);
+                    }
+                }
+
+                let current_port = form.port.clone();
+                if !current_port.trim().is_empty()
+                    && !available_ports.iter().any(|port| port == &current_port)
+                {
+                    ui.separator();
+                    ui.selectable_value(
+                        &mut form.port,
+                        current_port.clone(),
+                        format!("{current_port} (current)"),
+                    );
+                }
+            });
+        ui.add(TextEdit::singleline(&mut form.port).desired_width(260.0));
+    });
+}
+
+fn available_serial_ports() -> Vec<String> {
+    let mut ports: Vec<_> = SerialTransport::list_ports()
+        .into_iter()
+        .map(|port| port.port_name)
+        .collect();
+    ports.sort();
+    ports.dedup();
+    ports
+}
+
+fn selected_serial_port_text(current_port: &str, available_ports: &[String]) -> String {
+    if current_port.trim().is_empty() {
+        if available_ports.is_empty() {
+            String::from("No serial ports found")
+        } else {
+            String::from("Select port")
+        }
+    } else {
+        current_port.to_owned()
+    }
+}
+
 fn render_pipeline_header(
     ui: &mut Ui,
     pipeline: &mut PipelineForm,
@@ -524,12 +613,14 @@ fn render_pipeline_header(
                 FramerChoice::Length => "Length",
                 FramerChoice::Cobs => "Cobs",
                 FramerChoice::MixedTextPlot => "MixedTextPlot",
+                FramerChoice::Lua => "Lua",
             })
             .show_ui(ui, |ui| {
                 ui.selectable_value(&mut pipeline.framer, FramerChoice::Line, "Line");
                 ui.selectable_value(&mut pipeline.framer, FramerChoice::Fixed, "Fixed");
                 ui.selectable_value(&mut pipeline.framer, FramerChoice::Length, "Length");
                 ui.selectable_value(&mut pipeline.framer, FramerChoice::Cobs, "Cobs");
+                ui.selectable_value(&mut pipeline.framer, FramerChoice::Lua, "Lua");
                 if ui
                     .selectable_label(
                         matches!(pipeline.framer, FramerChoice::MixedTextPlot),
@@ -548,10 +639,12 @@ fn render_pipeline_header(
                 DecoderChoice::Hex => "Hex",
                 DecoderChoice::Plot => "Plot",
                 DecoderChoice::MixedTextPlot => "MixedTextPlot",
+                DecoderChoice::Lua => "Lua",
             })
             .show_ui(ui, |ui| {
                 ui.selectable_value(&mut pipeline.decoder, DecoderChoice::Text, "Text");
                 ui.selectable_value(&mut pipeline.decoder, DecoderChoice::Hex, "Hex");
+                ui.selectable_value(&mut pipeline.decoder, DecoderChoice::Lua, "Lua");
                 if ui
                     .selectable_label(matches!(pipeline.decoder, DecoderChoice::Plot), "Plot")
                     .clicked()
@@ -642,6 +735,14 @@ fn render_framer_settings(ui: &mut Ui, pipeline: &mut PipelineForm, index: usize
                 ui.add(DragValue::new(&mut pipeline.mixed_max_plot_frame).range(1..=16_777_216));
             });
         }
+        FramerChoice::Lua => {
+            ui.horizontal(|ui| {
+                ui.label("Script:");
+                ui.add(
+                    TextEdit::singleline(&mut pipeline.lua_framer_script_path).desired_width(260.0),
+                );
+            });
+        }
     }
 }
 
@@ -721,6 +822,15 @@ fn render_decoder_settings(ui: &mut Ui, pipeline: &mut PipelineForm, index: usiz
                 "Plot sample type, endian, format, and channels come from the mixed packet header.",
             );
         }
+        DecoderChoice::Lua => {
+            ui.horizontal(|ui| {
+                ui.label("Script:");
+                ui.add(
+                    TextEdit::singleline(&mut pipeline.lua_decoder_script_path)
+                        .desired_width(260.0),
+                );
+            });
+        }
     }
 }
 
@@ -768,7 +878,7 @@ fn validate_pipeline(ui: &mut Ui, pipeline: &PipelineForm, errors: &mut Vec<Stri
             };
             let sample_bytes = pipeline.plot_sample_type.byte_size();
             let frame_unit = channel_count.saturating_mul(sample_bytes);
-            if frame_unit == 0 || pipeline.fixed_frame_len % frame_unit != 0 {
+            if frame_unit == 0 || !pipeline.fixed_frame_len.is_multiple_of(frame_unit) {
                 push_error(format!(
                     "Fixed frame length must be a multiple of {} bytes for the current plot layout",
                     frame_unit
@@ -782,6 +892,18 @@ fn validate_pipeline(ui: &mut Ui, pipeline: &PipelineForm, errors: &mut Vec<Stri
     {
         push_error(String::from("Length framer len_bytes must be 1, 2, or 4"));
     }
+
+    if matches!(pipeline.framer, FramerChoice::Lua)
+        && pipeline.lua_framer_script_path.trim().is_empty()
+    {
+        push_error(String::from("Lua framer script path is required"));
+    }
+
+    if matches!(pipeline.decoder, DecoderChoice::Lua)
+        && pipeline.lua_decoder_script_path.trim().is_empty()
+    {
+        push_error(String::from("Lua decoder script path is required"));
+    }
 }
 
 fn render_text_encoding_combo(ui: &mut Ui, encoding: &mut TextEncoding, id: impl std::hash::Hash) {
@@ -881,6 +1003,15 @@ mod tests {
                         format: PlotFormat::Block,
                     },
                 },
+                PipelineConfig {
+                    name: String::from("lua"),
+                    framer: FramerConfig::Lua {
+                        script_path: String::from("/tmp/framer.lua"),
+                    },
+                    decoder: DecoderConfig::Lua {
+                        script_path: String::from("/tmp/decoder.lua"),
+                    },
+                },
             ],
             history_limit: 4096,
             auto_reconnect: true,
@@ -894,4 +1025,22 @@ mod tests {
             serde_json::to_string(&session).unwrap()
         );
     }
+
+    #[test]
+    fn selected_serial_port_text_prefers_current_value() {
+        let ports = vec![String::from("/dev/ttyUSB0")];
+        assert_eq!(
+            selected_serial_port_text("/dev/ttyUSB1", &ports),
+            "/dev/ttyUSB1"
+        );
+    }
+
+    #[test]
+    fn selected_serial_port_text_uses_placeholder_when_empty() {
+        assert_eq!(selected_serial_port_text("", &[]), "No serial ports found");
+        assert_eq!(
+            selected_serial_port_text("", &[String::from("/dev/ttyUSB0")]),
+            "Select port"
+        );
+    }
 }

crates/pipeview-gui/src/panels/console.rs

@@ -0,0 +1,98 @@
+use crate::ansi_render::{ansi_to_layout_job, ansi_to_layout_job_highlighted};
+use crate::app::{DisplayOptions, SearchState};
+use crate::buffers::{ConsoleLine, LineDirection, TextBuffer};
+use egui::{
+    Color32, Label, ScrollArea, TextStyle, TextWrapMode, Ui,
+    text::{LayoutJob, TextFormat},
+};
+
+pub fn render(
+    ui: &mut Ui,
+    buf: &TextBuffer,
+    display: DisplayOptions,
+    search: Option<&SearchState>,
+) -> usize {
+    let line_count = buf.len();
+    let row_height = ui.text_style_height(&TextStyle::Monospace);
+    ScrollArea::both().stick_to_bottom(true).show_rows(
+        ui,
+        row_height,
+        line_count,
+        |ui, row_range| {
+            for row in row_range {
+                if let Some(line) = buf.get(row) {
+                    ui.add(
+                        Label::new(format_console_line(line, display, search, ui.style()))
+                            .wrap_mode(TextWrapMode::Extend),
+                    );
+                }
+            }
+        },
+    );
+    line_count
+}
+
+fn monospace_format(style: &egui::Style) -> TextFormat {
+    TextFormat {
+        font_id: style
+            .text_styles
+            .get(&TextStyle::Monospace)
+            .cloned()
+            .unwrap_or_default(),
+            color: Color32::WHITE,
+        ..Default::default()
+    }
+}
+
+pub fn format_console_line(
+    line: &ConsoleLine,
+    display: DisplayOptions,
+    search: Option<&SearchState>,
+    style: &egui::Style,
+) -> LayoutJob {
+    let mut prefix = Vec::new();
+    if display.show_timestamp {
+        let ts = line.elapsed.as_secs_f64();
+        let time = if ts < 60.0 {
+            format!("{:05.2}", ts)
+        } else {
+            format!("{:02}:{:02}", (ts / 60.0) as u64, (ts % 60.0) as u64)
+        };
+        prefix.push(format!("[{time}]"));
+    }
+    if display.show_direction {
+        let dir = match line.direction {
+            LineDirection::In => "IN",
+            LineDirection::Out => "OUT",
+        };
+        prefix.push(format!("[{dir}]"));
+    }
+    if display.show_pipeline {
+        prefix.push(format!("[{}]", line.pipeline));
+    }
+    let prefix = if prefix.is_empty() {
+        String::new()
+    } else {
+        format!("{} ", prefix.join(" "))
+    };
+    let full_text = format!("{prefix}{}", line.text);
+
+    let default = monospace_format(style);
+    let highlight = TextFormat {
+        font_id: default.font_id.clone(),
+        color: Color32::BLACK,
+        background: Color32::from_rgb(255, 255, 0),
+        ..Default::default()
+    };
+
+    match search {
+        Some(state) if state.active && !state.query.is_empty() => ansi_to_layout_job_highlighted(
+            &full_text,
+            default,
+            &state.query,
+            state.case_sensitive,
+            highlight,
+        ),
+        _ => ansi_to_layout_job(&full_text, default),
+    }
+}

crates/pipeview-gui/src/panels/hex_view.rs

@@ -0,0 +1,137 @@
+use crate::app::{DisplayOptions, SearchState};
+use crate::buffers::{HexBuffer, HexLine, LineDirection};
+use egui::{
+    Color32, Label, ScrollArea, TextStyle, TextWrapMode, Ui,
+    text::{LayoutJob, TextFormat},
+};
+
+pub fn render(
+    ui: &mut Ui,
+    buf: &HexBuffer,
+    display: DisplayOptions,
+    search: Option<&SearchState>,
+) -> usize {
+    let line_count = buf.len();
+    if line_count == 0 {
+        ui.label("no hex data");
+        return 0;
+    }
+    let row_height = ui.text_style_height(&TextStyle::Monospace);
+    ScrollArea::both().stick_to_bottom(true).show_rows(
+        ui,
+        row_height,
+        line_count,
+        |ui, row_range| {
+            for row in row_range {
+                if let Some(line) = buf.get(row) {
+                    ui.add(
+                        Label::new(format_hex_line(line, display, search, ui.style()))
+                            .wrap_mode(TextWrapMode::Extend),
+                    );
+                }
+            }
+        },
+    );
+    line_count
+}
+
+fn highlight_matches(
+    text: &str,
+    query: &str,
+    case_sensitive: bool,
+    default_format: TextFormat,
+    highlight_format: TextFormat,
+) -> LayoutJob {
+    let search_text = if case_sensitive {
+        text.to_string()
+    } else {
+        text.to_lowercase()
+    };
+    let query = if case_sensitive {
+        query.to_string()
+    } else {
+        query.to_lowercase()
+    };
+    let mut job = LayoutJob::default();
+    let mut last_end = 0;
+    let mut idx = 0;
+    while let Some(pos) = search_text[idx..].find(&query) {
+        let start = idx + pos;
+        let end = start + query.len();
+        if last_end < start {
+            job.append(&text[last_end..start], 0.0, default_format.clone());
+        }
+        job.append(&text[start..end], 0.0, highlight_format.clone());
+        last_end = end;
+        idx = end;
+    }
+    if last_end < text.len() {
+        job.append(&text[last_end..], 0.0, default_format);
+    }
+    job
+}
+
+fn monospace_format(style: &egui::Style) -> TextFormat {
+    TextFormat {
+        font_id: style
+            .text_styles
+            .get(&TextStyle::Monospace)
+            .cloned()
+            .unwrap_or_default(),
+        color: Color32::WHITE,
+        ..Default::default()
+    }
+}
+
+fn format_hex_line(
+    line: &HexLine,
+    display: DisplayOptions,
+    search: Option<&SearchState>,
+    style: &egui::Style,
+) -> LayoutJob {
+    let mut prefix = Vec::new();
+    if display.show_timestamp {
+        let ts = line.elapsed.as_secs_f64();
+        let time = if ts < 60.0 {
+            format!("{:05.2}", ts)
+        } else {
+            format!("{:02}:{:02}", (ts / 60.0) as u64, (ts % 60.0) as u64)
+        };
+        prefix.push(format!("[{time}]"));
+    }
+    if display.show_direction {
+        let dir = match line.direction {
+            LineDirection::In => "IN",
+            LineDirection::Out => "OUT",
+        };
+        prefix.push(format!("[{dir}]"));
+    }
+    if display.show_pipeline {
+        prefix.push(format!("[{}]", line.pipeline));
+    }
+    let prefix = if prefix.is_empty() {
+        String::new()
+    } else {
+        format!("{} ", prefix.join(" "))
+    };
+    let full_text = format!("{prefix}{}  |{}|", line.hex, line.ascii);
+
+    let default = monospace_format(style);
+    let highlight = TextFormat {
+        font_id: default.font_id.clone(),
+        color: Color32::BLACK,
+        background: Color32::from_rgb(255, 255, 0),
+        ..Default::default()
+    };
+
+    match search {
+        Some(state) if state.active && !state.query.is_empty() => highlight_matches(
+            &full_text,
+            &state.query,
+            state.case_sensitive,
+            default,
+            highlight,
+        ),
+        _ => LayoutJob::single_section(full_text, default),
+    }
+}

crates/pipeview-gui/src/panels/plot_view.rs

@@ -1,31 +1,61 @@
 use crate::buffers::{PlotBuffer, PlotSeriesKind};
+use crate::perf::PlotRenderStats;
 use egui::{Button, Ui, vec2};
 use egui_plot::{Legend, Line, Plot, PlotBounds, PlotPoints};
 
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub enum PlotDisplayMode {
+    Embedded,
+    Detached,
+}
+
+#[derive(Default)]
 pub struct PlotViewState {
     pub lock_x: bool,
     pub lock_y: bool,
     pub box_zoom: bool,
     pub follow_latest: bool,
     pub last_bounds: Option<PlotBounds>,
+    pub detached: bool,
 }
 
-impl Default for PlotViewState {
+pub struct PlotRenderOutput {
-    fn default() -> Self {
+    pub stats: PlotRenderStats,
-        Self {
+    pub toggle_detached: bool,
-            lock_x: false,
-            lock_y: false,
-            box_zoom: false,
-            follow_latest: false,
-            last_bounds: None,
-        }
-    }
 }
 
-pub fn render(ui: &mut Ui, buf: &PlotBuffer, session_id: u64, state: &mut PlotViewState) {
+pub fn render(
+    ui: &mut Ui,
+    buf: &mut PlotBuffer,
+    session_id: u64,
+    state: &mut PlotViewState,
+) -> PlotRenderOutput {
+    let mode = if state.detached {
+        PlotDisplayMode::Detached
+    } else {
+        PlotDisplayMode::Embedded
+    };
+    let mut toggle_detached = false;
+
     if buf.is_empty() {
+        ui.horizontal_wrapped(|ui| {
+            let toggle_label = match mode {
+                PlotDisplayMode::Embedded => "Pop Out",
+                PlotDisplayMode::Detached => "Dock Back",
+            };
+            if ui.button(toggle_label).clicked() {
+                toggle_detached = true;
+            }
             ui.label("no plot data");
-        return;
+        });
+        return PlotRenderOutput {
+            stats: PlotRenderStats {
+                series_count: 0,
+                stored_points: 0,
+                rendered_points: 0,
+            },
+            toggle_detached,
+        };
     }
 
     let mut auto_fit = false;
@@ -40,6 +70,13 @@ pub fn render(ui: &mut Ui, buf: &PlotBuffer, session_id: u64, state: &mut PlotVi
         if ui.button("Reset View").clicked() {
             reset_view = true;
         }
+        let toggle_label = match mode {
+            PlotDisplayMode::Embedded => "Pop Out",
+            PlotDisplayMode::Detached => "Dock Back",
+        };
+        if ui.button(toggle_label).clicked() {
+            toggle_detached = true;
+        }
         ui.separator();
         ui.checkbox(&mut state.lock_x, "Lock X");
         ui.checkbox(&mut state.lock_y, "Lock Y");
@@ -92,7 +129,7 @@ pub fn render(ui: &mut Ui, buf: &PlotBuffer, session_id: u64, state: &mut PlotVi
         });
     }
 
-    let data_bounds = plot_bounds(buf);
+    let data_bounds = buf.plot_bounds();
     let mut plot = Plot::new(format!("plot_view_{session_id}"))
         .legend(Legend::default())
         .allow_boxed_zoom(state.box_zoom)
@@ -107,6 +144,7 @@ pub fn render(ui: &mut Ui, buf: &PlotBuffer, session_id: u64, state: &mut PlotVi
         plot = plot.reset();
     }
 
+    let mut rendered_points = 0usize;
     plot.show(ui, |plot_ui| {
         let current_bounds = plot_ui.plot_bounds();
         state.last_bounds = current_bounds.is_finite().then_some(current_bounds);
@@ -123,7 +161,10 @@ pub fn render(ui: &mut Ui, buf: &PlotBuffer, session_id: u64, state: &mut PlotVi
             if let Some(bounds) = data_bounds {
                 let current_width = current_bounds.width();
                 let data_width = bounds.width();
-                let x_range = if current_width.is_finite() && current_width > 0.0 && data_width > current_width {
+                let x_range = if current_width.is_finite()
+                    && current_width > 0.0
+                    && data_width > current_width
+                {
                     (bounds.max()[0] - current_width)..=bounds.max()[0]
                 } else {
                     bounds.min()[0]..=bounds.max()[0]
@@ -132,7 +173,10 @@ pub fn render(ui: &mut Ui, buf: &PlotBuffer, session_id: u64, state: &mut PlotVi
                 plot_ui.set_plot_bounds_x(x_range.clone());
 
                 let mut followed = current_bounds;
-                followed.set_x(&PlotBounds::from_min_max([*x_range.start(), current_bounds.min()[1]], [*x_range.end(), current_bounds.max()[1]]));
+                followed.set_x(&PlotBounds::from_min_max(
+                    [*x_range.start(), current_bounds.min()[1]],
+                    [*x_range.end(), current_bounds.max()[1]],
+                ));
                 state.last_bounds = Some(followed);
             }
         } else if zoom_x != 1.0 || zoom_y != 1.0 {
@@ -151,49 +195,25 @@ pub fn render(ui: &mut Ui, buf: &PlotBuffer, session_id: u64, state: &mut PlotVi
 
         for series in buf.iter() {
             let sampled_points = match buf.kind() {
-                PlotSeriesKind::TimeSeries => {
+                PlotSeriesKind::TimeSeries => series.render_points_time_series(
-                    series.render_points_time_series(
                     current_bounds.min()[0],
                     current_bounds.max()[0],
                     max_render_points,
-                    )
+                ),
-                }
                 PlotSeriesKind::XY => series.render_points_xy(max_render_points),
             };
+            rendered_points += sampled_points.len();
             let points = PlotPoints::from_iter(sampled_points);
             plot_ui.line(Line::new(series.name.clone(), points));
         }
     });
-}
+
-
+    PlotRenderOutput {
-fn plot_bounds(buf: &PlotBuffer) -> Option<PlotBounds> {
+        stats: PlotRenderStats {
-    let mut bounds = PlotBounds::NOTHING;
+            series_count: buf.series_len(),
-
+            stored_points: buf.total_points(),
-    for series in buf.iter() {
+            rendered_points,
-        for [x, y] in series.points() {
+        },
-            if x.is_finite() && y.is_finite() {
+        toggle_detached,
-                bounds.extend_with(&[x, y].into());
+    }
-            }
-        }
-    }
-
-    if !bounds.is_finite() {
-        return None;
-    }
-
-    if bounds.width() <= 0.0 {
-        let center_x = bounds.center().x;
-        bounds.set_x_center_width(center_x, 1.0);
-    } else {
-        bounds.expand_x(bounds.width() * 0.05);
-    }
-
-    if bounds.height() <= 0.0 {
-        let center_y = bounds.center().y;
-        bounds.set_y_center_height(center_y, 1.0);
-    } else {
-        bounds.expand_y(bounds.height() * 0.1);
-    }
-
-    Some(bounds)
 }

crates/pipeview-gui/src/panels/sidebar.rs

@@ -12,6 +12,7 @@ pub fn render(
     sessions: &[SessionListItem],
     active: &mut usize,
     on_new: &mut bool,
+    on_edit: &mut Option<usize>,
     on_delete: &mut Option<usize>,
 ) {
     ui.heading("Sessions");
@@ -37,12 +38,23 @@ pub fn render(
             "{} Session {}\n{}",
             status_tag, session.id, session.transport_summary
         );
+        ui.horizontal(|ui| {
             if ui
                 .selectable_label(*active == i, RichText::new(label).color(color))
                 .clicked()
             {
                 *active = i;
             }
+
+            if ui
+                .small_button("⚙")
+                .on_hover_text("Edit session config")
+                .clicked()
+            {
+                *active = i;
+                *on_edit = Some(i);
+            }
+        });
     }
 
     ui.separator();

crates/pipeview-gui/src/perf.rs

@@ -0,0 +1,257 @@
+use std::env;
+use std::sync::Arc;
+use std::sync::atomic::{AtomicU64, Ordering};
+use std::time::{Duration, Instant};
+
+use tracing::info;
+
+#[derive(Clone, Default)]
+pub struct RepaintCounter {
+    inner: Arc<AtomicU64>,
+}
+
+impl RepaintCounter {
+    pub fn increment(&self) {
+        self.inner.fetch_add(1, Ordering::Relaxed);
+    }
+
+    fn take(&self) -> u64 {
+        self.inner.swap(0, Ordering::Relaxed)
+    }
+}
+
+#[derive(Default)]
+struct DurationStats {
+    count: u64,
+    total: Duration,
+    max: Duration,
+}
+
+impl DurationStats {
+    fn record(&mut self, elapsed: Duration) {
+        self.count += 1;
+        self.total += elapsed;
+        self.max = self.max.max(elapsed);
+    }
+
+    fn avg_ms(&self) -> f64 {
+        if self.count == 0 {
+            0.0
+        } else {
+            (self.total.as_secs_f64() * 1000.0) / self.count as f64
+        }
+    }
+
+    fn max_ms(&self) -> f64 {
+        self.max.as_secs_f64() * 1000.0
+    }
+}
+
+#[derive(Default)]
+struct IntervalStats {
+    frames: DurationStats,
+    drains: DurationStats,
+    text_renders: DurationStats,
+    hex_renders: DurationStats,
+    plot_renders: DurationStats,
+    drained_events: u64,
+    drained_data_events: u64,
+    drained_text_events: u64,
+    drained_hex_events: u64,
+    drained_plot_events: u64,
+    max_pending_events: usize,
+    max_text_lines: usize,
+    max_hex_lines: usize,
+    max_plot_series: usize,
+    max_plot_stored_points: usize,
+    max_plot_rendered_points: usize,
+    tabs: usize,
+    active_view: &'static str,
+    active_text_lines: usize,
+    active_hex_lines: usize,
+    active_plot_series: usize,
+    active_plot_points: usize,
+}
+
+pub struct DrainStats {
+    pub drained_events: u64,
+    pub drained_data_events: u64,
+    pub drained_text_events: u64,
+    pub drained_hex_events: u64,
+    pub drained_plot_events: u64,
+    pub pending_events: usize,
+}
+
+#[derive(Clone, Copy)]
+pub struct GuiSnapshot {
+    pub tabs: usize,
+    pub active_view: &'static str,
+    pub active_text_lines: usize,
+    pub active_hex_lines: usize,
+    pub active_plot_series: usize,
+    pub active_plot_points: usize,
+}
+
+pub struct PlotRenderStats {
+    pub series_count: usize,
+    pub stored_points: usize,
+    pub rendered_points: usize,
+}
+
+pub struct GuiProfiler {
+    enabled: bool,
+    interval: Duration,
+    last_report_at: Instant,
+    repaint_counter: RepaintCounter,
+    interval_stats: IntervalStats,
+}
+
+impl GuiProfiler {
+    pub fn from_env() -> Self {
+        let enabled = env_flag("XSERIAL_GUI_PROFILE");
+        let interval_ms = env::var("XSERIAL_GUI_PROFILE_INTERVAL_MS")
+            .ok()
+            .and_then(|value| value.parse::<u64>().ok())
+            .filter(|value| *value > 0)
+            .unwrap_or(1_000);
+        Self {
+            enabled,
+            interval: Duration::from_millis(interval_ms),
+            last_report_at: Instant::now(),
+            repaint_counter: RepaintCounter::default(),
+            interval_stats: IntervalStats {
+                active_view: "none",
+                ..IntervalStats::default()
+            },
+        }
+    }
+
+    pub fn repaint_counter(&self) -> RepaintCounter {
+        self.repaint_counter.clone()
+    }
+
+    pub fn record_drain(&mut self, elapsed: Duration, stats: DrainStats) {
+        if !self.enabled {
+            return;
+        }
+
+        self.interval_stats.drains.record(elapsed);
+        self.interval_stats.drained_events += stats.drained_events;
+        self.interval_stats.drained_data_events += stats.drained_data_events;
+        self.interval_stats.drained_text_events += stats.drained_text_events;
+        self.interval_stats.drained_hex_events += stats.drained_hex_events;
+        self.interval_stats.drained_plot_events += stats.drained_plot_events;
+        self.interval_stats.max_pending_events = self
+            .interval_stats
+            .max_pending_events
+            .max(stats.pending_events);
+    }
+
+    pub fn record_text_render(&mut self, elapsed: Duration, line_count: usize) {
+        if !self.enabled {
+            return;
+        }
+
+        self.interval_stats.text_renders.record(elapsed);
+        self.interval_stats.max_text_lines = self.interval_stats.max_text_lines.max(line_count);
+    }
+
+    pub fn record_hex_render(&mut self, elapsed: Duration, line_count: usize) {
+        if !self.enabled {
+            return;
+        }
+
+        self.interval_stats.hex_renders.record(elapsed);
+        self.interval_stats.max_hex_lines = self.interval_stats.max_hex_lines.max(line_count);
+    }
+
+    pub fn record_plot_render(&mut self, elapsed: Duration, stats: PlotRenderStats) {
+        if !self.enabled {
+            return;
+        }
+
+        self.interval_stats.plot_renders.record(elapsed);
+        self.interval_stats.max_plot_series =
+            self.interval_stats.max_plot_series.max(stats.series_count);
+        self.interval_stats.max_plot_stored_points = self
+            .interval_stats
+            .max_plot_stored_points
+            .max(stats.stored_points);
+        self.interval_stats.max_plot_rendered_points = self
+            .interval_stats
+            .max_plot_rendered_points
+            .max(stats.rendered_points);
+    }
+
+    pub fn record_frame(&mut self, elapsed: Duration, snapshot: GuiSnapshot) {
+        if !self.enabled {
+            return;
+        }
+
+        self.interval_stats.frames.record(elapsed);
+        self.interval_stats.tabs = snapshot.tabs;
+        self.interval_stats.active_view = snapshot.active_view;
+        self.interval_stats.active_text_lines = snapshot.active_text_lines;
+        self.interval_stats.active_hex_lines = snapshot.active_hex_lines;
+        self.interval_stats.active_plot_series = snapshot.active_plot_series;
+        self.interval_stats.active_plot_points = snapshot.active_plot_points;
+
+        if self.last_report_at.elapsed() < self.interval {
+            return;
+        }
+
+        let repaints = self.repaint_counter.take();
+        info!(
+            target: "pipeview_gui::perf",
+            frames = self.interval_stats.frames.count,
+            frame_avg_ms = self.interval_stats.frames.avg_ms(),
+            frame_max_ms = self.interval_stats.frames.max_ms(),
+            drains = self.interval_stats.drains.count,
+            drain_avg_ms = self.interval_stats.drains.avg_ms(),
+            drain_max_ms = self.interval_stats.drains.max_ms(),
+            drained_events = self.interval_stats.drained_events,
+            drained_data_events = self.interval_stats.drained_data_events,
+            drained_text_events = self.interval_stats.drained_text_events,
+            drained_hex_events = self.interval_stats.drained_hex_events,
+            drained_plot_events = self.interval_stats.drained_plot_events,
+            repaint_requests = repaints,
+            max_pending_events = self.interval_stats.max_pending_events,
+            text_renders = self.interval_stats.text_renders.count,
+            text_avg_ms = self.interval_stats.text_renders.avg_ms(),
+            text_max_ms = self.interval_stats.text_renders.max_ms(),
+            max_text_lines = self.interval_stats.max_text_lines,
+            hex_renders = self.interval_stats.hex_renders.count,
+            hex_avg_ms = self.interval_stats.hex_renders.avg_ms(),
+            hex_max_ms = self.interval_stats.hex_renders.max_ms(),
+            max_hex_lines = self.interval_stats.max_hex_lines,
+            plot_renders = self.interval_stats.plot_renders.count,
+            plot_avg_ms = self.interval_stats.plot_renders.avg_ms(),
+            plot_max_ms = self.interval_stats.plot_renders.max_ms(),
+            max_plot_series = self.interval_stats.max_plot_series,
+            max_plot_stored_points = self.interval_stats.max_plot_stored_points,
+            max_plot_rendered_points = self.interval_stats.max_plot_rendered_points,
+            tabs = self.interval_stats.tabs,
+            active_view = self.interval_stats.active_view,
+            active_text_lines = self.interval_stats.active_text_lines,
+            active_hex_lines = self.interval_stats.active_hex_lines,
+            active_plot_series = self.interval_stats.active_plot_series,
+            active_plot_points = self.interval_stats.active_plot_points,
+            "gui perf"
+        );
+
+        self.last_report_at = Instant::now();
+        self.interval_stats = IntervalStats {
+            active_view: "none",
+            ..IntervalStats::default()
+        };
+    }
+}
+
+fn env_flag(name: &str) -> bool {
+    env::var(name)
+        .map(|value| {
+            let value = value.trim().to_ascii_lowercase();
+            !value.is_empty() && value != "0" && value != "false" && value != "off"
+        })
+        .unwrap_or(false)
+}

crates/pipeview-gui/src/shortcuts.rs

@@ -0,0 +1,139 @@
+use egui::{Context, Key, KeyboardShortcut, Modifiers};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum Action {
+    NextTab,
+    PrevTab,
+
+    ViewText,
+    ViewHex,
+    ViewPlot,
+
+    NewSession,
+    EditSession,
+    DeleteSession,
+    ToggleConnect,
+    Clear,
+
+    UiSettings,
+    CloseOverlay,
+
+    Search,
+    SearchNext,
+    SearchPrev,
+}
+
+pub fn default_bindings() -> Vec<(Action, KeyboardShortcut)> {
+    use Action::*;
+
+    vec![
+        (NextTab, KeyboardShortcut::new(Modifiers::CTRL, Key::Tab)),
+        (
+            PrevTab,
+            KeyboardShortcut::new(Modifiers::CTRL | Modifiers::SHIFT, Key::Tab),
+        ),
+        (ViewText, KeyboardShortcut::new(Modifiers::CTRL, Key::T)),
+        (ViewHex, KeyboardShortcut::new(Modifiers::CTRL, Key::H)),
+        (ViewPlot, KeyboardShortcut::new(Modifiers::CTRL, Key::P)),
+        (NewSession, KeyboardShortcut::new(Modifiers::CTRL, Key::N)),
+        (EditSession, KeyboardShortcut::new(Modifiers::CTRL, Key::E)),
+        (
+            DeleteSession,
+            KeyboardShortcut::new(Modifiers::CTRL, Key::W),
+        ),
+        (
+            ToggleConnect,
+            KeyboardShortcut::new(Modifiers::CTRL, Key::F5),
+        ),
+        (Clear, KeyboardShortcut::new(Modifiers::CTRL, Key::L)),
+        (
+            UiSettings,
+            KeyboardShortcut::new(Modifiers::CTRL, Key::Comma),
+        ),
+        (
+            CloseOverlay,
+            KeyboardShortcut::new(Modifiers::NONE, Key::Escape),
+        ),
+        (Search, KeyboardShortcut::new(Modifiers::CTRL, Key::F)),
+        (SearchNext, KeyboardShortcut::new(Modifiers::NONE, Key::F3)),
+        (SearchPrev, KeyboardShortcut::new(Modifiers::SHIFT, Key::F3)),
+    ]
+}
+
+pub fn process(
+    ctx: &Context,
+    suppress_char_shortcuts: bool,
+    bindings: &[(Action, KeyboardShortcut)],
+) -> Vec<Action> {
+    let mut actions = Vec::new();
+
+    ctx.input_mut(|input| {
+        for (action, shortcut) in bindings {
+            if !input.consume_shortcut(shortcut) {
+                continue;
+            }
+
+            if suppress_char_shortcuts && is_char_based(*action) {
+                continue;
+            }
+
+            actions.push(*action);
+        }
+    });
+
+    actions
+}
+
+fn is_char_based(action: Action) -> bool {
+    use Action::*;
+    !matches!(action, CloseOverlay)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn bindings_contain_no_duplicate_shortcuts() {
+        let bindings = default_bindings();
+        for (i, (_, a)) in bindings.iter().enumerate() {
+            for (j, (_, b)) in bindings.iter().enumerate() {
+                if i != j {
+                    assert_ne!(a, b, "Duplicate shortcut at indices {i} and {j}");
+                }
+            }
+        }
+    }
+
+    #[test]
+    fn bindings_non_empty() {
+        assert!(!default_bindings().is_empty());
+    }
+
+    #[test]
+    fn close_overlay_not_char_based() {
+        assert!(!is_char_based(Action::CloseOverlay));
+    }
+
+    #[test]
+    fn all_other_actions_are_char_based() {
+        for action in [
+            Action::NextTab,
+            Action::PrevTab,
+            Action::ViewText,
+            Action::ViewHex,
+            Action::ViewPlot,
+            Action::NewSession,
+            Action::EditSession,
+            Action::DeleteSession,
+            Action::ToggleConnect,
+            Action::Clear,
+            Action::UiSettings,
+            Action::Search,
+            Action::SearchNext,
+            Action::SearchPrev,
+        ] {
+            assert!(is_char_based(action), "{action:?} should be char-based");
+        }
+    }
+}

crates/pipeview-gui/src/ui_fonts.rs

@@ -10,19 +10,14 @@ use tracing::{info, warn};
 
 const FONT_SETTINGS_FILE_NAME: &str = "gui-fonts.json";
 
-#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, Default)]
 pub enum FontChoice {
     Auto,
+    #[default]
     Default,
     System(String),
 }
 
-impl Default for FontChoice {
-    fn default() -> Self {
-        Self::Default
-    }
-}
-
 #[derive(Clone, Debug)]
 pub struct FontCandidate {
     pub id: String,
@@ -363,12 +358,12 @@ fn font_settings_path_for_os_and_env(
         "windows" => {
             if let Some(path) = get_env("APPDATA").filter(|path| !path.trim().is_empty()) {
                 return PathBuf::from(path)
-                    .join("xserial")
+                    .join("pipeview")
                     .join(FONT_SETTINGS_FILE_NAME);
             }
             if let Some(path) = get_env("LOCALAPPDATA").filter(|path| !path.trim().is_empty()) {
                 return PathBuf::from(path)
-                    .join("xserial")
+                    .join("pipeview")
                     .join(FONT_SETTINGS_FILE_NAME);
             }
         }
@@ -377,20 +372,20 @@ fn font_settings_path_for_os_and_env(
                 return PathBuf::from(home)
                     .join("Library")
                     .join("Application Support")
-                    .join("xserial")
+                    .join("pipeview")
                     .join(FONT_SETTINGS_FILE_NAME);
             }
         }
         _ => {
             if let Some(path) = get_env("XDG_CONFIG_HOME").filter(|path| !path.trim().is_empty()) {
                 return PathBuf::from(path)
-                    .join("xserial")
+                    .join("pipeview")
                     .join(FONT_SETTINGS_FILE_NAME);
             }
             if let Some(home) = get_env("HOME").filter(|path| !path.trim().is_empty()) {
                 return PathBuf::from(home)
                     .join(".config")
-                    .join("xserial")
+                    .join("pipeview")
                     .join(FONT_SETTINGS_FILE_NAME);
             }
         }
@@ -596,7 +591,7 @@ mod tests {
             .duration_since(UNIX_EPOCH)
             .unwrap()
             .as_nanos();
-        let dir = env::temp_dir().join(format!("xserial-gui-font-settings-{unique}"));
+        let dir = env::temp_dir().join(format!("pipeview-gui-font-settings-{unique}"));
         let path = dir.join("gui-fonts.json");
         let settings = UiFontSettings {
             primary_choice: FontChoice::System(String::from("primary")),
@@ -627,7 +622,7 @@ mod tests {
         assert_eq!(
             path,
             PathBuf::from("/tmp/xdg-config")
-                .join("xserial")
+                .join("pipeview")
                 .join(FONT_SETTINGS_FILE_NAME)
         );
     }
@@ -641,7 +636,7 @@ mod tests {
         assert_eq!(
             path,
             PathBuf::from(r"C:\Users\Test\AppData\Roaming")
-                .join("xserial")
+                .join("pipeview")
                 .join(FONT_SETTINGS_FILE_NAME)
         );
     }
@@ -657,7 +652,7 @@ mod tests {
             PathBuf::from("/Users/tester")
                 .join("Library")
                 .join("Application Support")
-                .join("xserial")
+                .join("pipeview")
                 .join(FONT_SETTINGS_FILE_NAME)
         );
     }

crates/pipeview-tui/Cargo.toml

@@ -1,15 +1,15 @@
 [package]
-name = "xserial-tui"
+name = "pipeview-tui"
 version = "0.1.0"
 edition = "2024"
 
 [[bin]]
-name = "xserial-tui"
+name = "pipeview-tui"
 path = "src/main.rs"
 
 [dependencies]
-xserial-core = { path = "../xserial-core" }
+pipeview-core = { path = "../pipeview-core" }
-xserial-client = { path = "../xserial-client" }
+pipeview-client = { path = "../pipeview-client" }
 tokio = { workspace = true }
 ratatui = { workspace = true }
 crossterm = { workspace = true }
@@ -19,3 +19,7 @@ tracing-appender = { workspace = true }
 clap = { workspace = true }
 hex = { workspace = true }
 image = { workspace = true }
+mlua = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+ansitok = "0.3"

crates/pipeview-tui/src/ansi.rs

@@ -0,0 +1,295 @@
+use ansitok::{AnsiColor, ElementKind, VisualAttribute, parse_ansi, parse_ansi_sgr};
+use ratatui::style::{Color, Modifier, Style};
+use ratatui::text::Span;
+
+/// Parse ANSI-encoded text and return a Vec of styled Spans.
+///
+/// ANSI SGR sequences (colors, bold, italic, underline, strikethrough)
+/// are converted to ratatui `Style` applied on top of `base_style`.
+/// Non-SGR sequences (cursor movement, etc.) are silently ignored.
+pub fn ansi_to_spans(text: &str, base_style: Style) -> Vec<Span<'static>> {
+    let mut spans = Vec::new();
+    let mut style = AnsiStyleStack::default();
+
+    for element in parse_ansi(text) {
+        match element.kind() {
+            ElementKind::Text => {
+                let slice = &text[element.start()..element.end()];
+                if !slice.is_empty() {
+                    spans.push(Span::styled(
+                        slice.to_string(),
+                        style.merge(base_style),
+                    ));
+                }
+            }
+            ElementKind::Sgr => {
+                let sgr = &text[element.start()..element.end()];
+                apply_sgr_sequence(&mut style, sgr);
+            }
+            _ => {}
+        }
+    }
+
+    spans
+}
+
+/// Extract visible text from ANSI-encoded string (strips escape sequences).
+///
+/// This is the text that a user would actually see on a terminal —
+/// useful for search, copy, and line counting.
+pub fn ansi_visible_text(text: &str) -> String {
+    let mut visible = String::new();
+    for element in parse_ansi(text) {
+        if element.kind() == ElementKind::Text {
+            visible.push_str(&text[element.start()..element.end()]);
+        }
+    }
+    visible
+}
+
+// ── internal style stack ──
+
+#[derive(Default, Clone)]
+struct AnsiStyleStack {
+    fg: Option<Color>,
+    bg: Option<Color>,
+    bold: bool,
+    italic: bool,
+    underline: bool,
+    strikethrough: bool,
+}
+
+impl AnsiStyleStack {
+    fn apply_sgr_attr(&mut self, attr: VisualAttribute) {
+        match attr {
+            VisualAttribute::Reset(0) => *self = Self::default(),
+            VisualAttribute::Reset(22) => self.bold = false,
+            VisualAttribute::Reset(23) => self.italic = false,
+            VisualAttribute::Reset(24) => self.underline = false,
+            VisualAttribute::Reset(29) => self.strikethrough = false,
+            VisualAttribute::Reset(39) => self.fg = None,
+            VisualAttribute::Reset(49) => self.bg = None,
+            VisualAttribute::Reset(_) => {}
+            VisualAttribute::Bold => self.bold = true,
+            VisualAttribute::Faint => self.bold = false,
+            VisualAttribute::Italic => self.italic = true,
+            VisualAttribute::Underline => self.underline = true,
+            VisualAttribute::Crossedout => self.strikethrough = true,
+            VisualAttribute::FgColor(c) => self.fg = Some(ansi_color_to_ratatui(c)),
+            VisualAttribute::BgColor(c) => self.bg = Some(ansi_color_to_ratatui(c)),
+            _ => {}
+        }
+    }
+
+    fn apply_sgr(&mut self, sgr: &str) {
+        // Strip ESC[ ... m wrapper and delegate to ansitok's SGR parser
+        let params = sgr
+            .strip_prefix("\x1b[")
+            .and_then(|s| s.strip_suffix('m'))
+            .unwrap_or(sgr);
+
+        if params.is_empty() {
+            *self = Self::default();
+            return;
+        }
+
+        for output in parse_ansi_sgr(sgr) {
+            if let Some(attr) = output.as_escape() {
+                self.apply_sgr_attr(attr);
+            }
+        }
+    }
+
+    fn merge(&self, base: Style) -> Style {
+        let mut style = base;
+
+        if let Some(fg) = self.fg {
+            if self.bold {
+                style = style.fg(brighten(fg));
+            } else {
+                style = style.fg(fg);
+            }
+        }
+        if let Some(bg) = self.bg {
+            style = style.bg(bg);
+        }
+        if self.italic {
+            style = style.add_modifier(Modifier::ITALIC);
+        }
+        if self.underline {
+            style = style.add_modifier(Modifier::UNDERLINED);
+        }
+        if self.strikethrough {
+            style = style.add_modifier(Modifier::CROSSED_OUT);
+        }
+        if self.bold {
+            // Bold applied only when there's no explicit fg (brighten handles it otherwise)
+            style = style.add_modifier(Modifier::BOLD);
+        }
+
+        style
+    }
+}
+
+fn apply_sgr_sequence(style: &mut AnsiStyleStack, sgr: &str) {
+    style.apply_sgr(sgr);
+}
+
+// ── color conversion ──
+
+fn ansi_color_to_ratatui(color: AnsiColor) -> Color {
+    match color {
+        AnsiColor::Bit4(c) => ansi_4bit(c),
+        AnsiColor::Bit8(c) => ansi_256(c),
+        AnsiColor::Bit24 { r, g, b } => Color::Rgb(r, g, b),
+    }
+}
+
+fn ansi_4bit(code: u8) -> Color {
+    match code {
+        30 => Color::Rgb(0, 0, 0),
+        31 => Color::Rgb(194, 54, 33),
+        32 => Color::Rgb(37, 188, 36),
+        33 => Color::Rgb(173, 173, 39),
+        34 => Color::Rgb(73, 46, 225),
+        35 => Color::Rgb(211, 56, 211),
+        36 => Color::Rgb(51, 187, 200),
+        37 => Color::Rgb(203, 204, 205),
+
+        90 => Color::Rgb(129, 131, 131),
+        91 => Color::Rgb(252, 57, 31),
+        92 => Color::Rgb(49, 231, 34),
+        93 => Color::Rgb(234, 236, 35),
+        94 => Color::Rgb(88, 51, 255),
+        95 => Color::Rgb(249, 53, 248),
+        96 => Color::Rgb(20, 240, 240),
+        97 => Color::Rgb(233, 235, 235),
+
+        // Background colors (same values as foreground but offset by 10)
+        40 => Color::Rgb(0, 0, 0),
+        41 => Color::Rgb(194, 54, 33),
+        42 => Color::Rgb(37, 188, 36),
+        43 => Color::Rgb(173, 173, 39),
+        44 => Color::Rgb(73, 46, 225),
+        45 => Color::Rgb(211, 56, 211),
+        46 => Color::Rgb(51, 187, 200),
+        47 => Color::Rgb(203, 204, 205),
+
+        100 => Color::Rgb(129, 131, 131),
+        101 => Color::Rgb(252, 57, 31),
+        102 => Color::Rgb(49, 231, 34),
+        103 => Color::Rgb(234, 236, 35),
+        104 => Color::Rgb(88, 51, 255),
+        105 => Color::Rgb(249, 53, 248),
+        106 => Color::Rgb(20, 240, 240),
+        107 => Color::Rgb(233, 235, 235),
+
+        _ => Color::Rgb(255, 255, 255),
+    }
+}
+
+fn ansi_256(code: u8) -> Color {
+    match code {
+        0..=15 => ansi_4bit(if code < 8 { code + 30 } else { code + 82 }),
+        16..=231 => {
+            let idx = code - 16;
+            let cube = [0, 95, 135, 175, 215, 255];
+            let r = cube[(idx / 36) as usize];
+            let g = cube[((idx / 6) % 6) as usize];
+            let b = cube[(idx % 6) as usize];
+            Color::Rgb(r, g, b)
+        }
+        232..=255 => {
+            let v = (code - 232) * 10 + 8;
+            Color::Rgb(v, v, v)
+        }
+    }
+}
+
+fn brighten(color: Color) -> Color {
+    match color {
+        Color::Rgb(r, g, b) => Color::Rgb(
+            ((r as u32) * 13 / 10).min(255) as u8,
+            ((g as u32) * 13 / 10).min(255) as u8,
+            ((b as u32) * 13 / 10).min(255) as u8,
+        ),
+        _ => color,
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use ratatui::style::Style;
+
+    fn visible<'a>(spans: &[Span<'a>]) -> String {
+        spans.iter().map(|s| s.content.as_ref()).collect::<String>()
+    }
+
+    #[test]
+    fn plain_text_no_ansi() {
+        let spans = ansi_to_spans("hello", Style::default());
+        assert_eq!(spans.len(), 1);
+        assert_eq!(spans[0].content, "hello");
+    }
+
+    #[test]
+    fn fg_red_reset() {
+        let spans = ansi_to_spans("\x1b[31mred\x1b[0m plain", Style::default());
+        assert!(spans.len() >= 2);
+        assert_eq!(visible(&spans), "red plain");
+    }
+
+    #[test]
+    fn empty_sgr_resets_all() {
+        let base = Style::default().fg(Color::Rgb(1, 2, 3));
+        let spans = ansi_to_spans("\x1b[31mred\x1b[m plain", base);
+        assert_eq!(visible(&spans), "red plain");
+        assert!(spans.len() >= 2);
+        // First span should have red foreground
+        assert_ne!(spans[0].style.fg, Some(Color::Rgb(1, 2, 3)));
+        // Last span should have base foreground
+        assert_eq!(spans.last().unwrap().style.fg, Some(Color::Rgb(1, 2, 3)));
+    }
+
+    #[test]
+    fn bold_brightens_color() {
+        let spans = ansi_to_spans("\x1b[1;31mbold red\x1b[0m", Style::default());
+        assert_eq!(spans.len(), 1);
+        assert_eq!(visible(&spans), "bold red");
+    }
+
+    #[test]
+    fn strip_ansi_codes_from_output() {
+        let spans = ansi_to_spans("\x1b[32mgreen\x1b[0m", Style::default());
+        assert_eq!(visible(&spans), "green");
+    }
+
+    #[test]
+    fn visible_text_strips_ansi() {
+        assert_eq!(ansi_visible_text("plain"), "plain");
+        assert_eq!(ansi_visible_text("\x1b[31mred\x1b[0m"), "red");
+        assert_eq!(
+            ansi_visible_text("\x1b[1;32mbold green\x1b[0m plain"),
+            "bold green plain"
+        );
+    }
+
+    #[test]
+    fn xterm_256_color_cube() {
+        assert_eq!(ansi_256(16), Color::Rgb(0, 0, 0));
+        assert_eq!(ansi_256(21), Color::Rgb(0, 0, 255));
+        assert_eq!(ansi_256(52), Color::Rgb(95, 0, 0));
+        assert_eq!(ansi_256(67), Color::Rgb(95, 135, 175));
+    }
+
+    #[test]
+    fn true_color_24bit() {
+        let spans = ansi_to_spans(
+            "\x1b[38;2;100;200;50mtruecolor\x1b[0m",
+            Style::default(),
+        );
+        assert_eq!(visible(&spans), "truecolor");
+        assert_eq!(spans[0].style.fg, Some(Color::Rgb(100, 200, 50)));
+    }
+}

crates/pipeview-tui/src/app_state.rs

@@ -0,0 +1,169 @@
+use std::env;
+use std::fs;
+use std::io;
+use std::path::{Path, PathBuf};
+
+use pipeview_client::SessionConfig;
+use serde::{Deserialize, Serialize};
+use tracing::warn;
+
+use crate::app::{DisplayOptions, View, default_session_config};
+
+const TUI_STATE_FILE_NAME: &str = "tui-state.json";
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct PersistedTuiState {
+    #[serde(default = "default_session")]
+    pub session: SessionConfig,
+    #[serde(default)]
+    pub active_view: PersistedView,
+    #[serde(default = "default_true")]
+    pub show_timestamp: bool,
+    #[serde(default = "default_true")]
+    pub show_direction: bool,
+    #[serde(default = "default_true")]
+    pub show_pipeline: bool,
+}
+
+impl Default for PersistedTuiState {
+    fn default() -> Self {
+        Self {
+            session: default_session(),
+            active_view: PersistedView::Text,
+            show_timestamp: true,
+            show_direction: true,
+            show_pipeline: true,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, Default)]
+pub enum PersistedView {
+    #[default]
+    Text,
+    Hex,
+    Plot,
+}
+
+impl From<View> for PersistedView {
+    fn from(value: View) -> Self {
+        match value {
+            View::Text => Self::Text,
+            View::Hex => Self::Hex,
+            View::Plot => Self::Plot,
+        }
+    }
+}
+
+impl From<PersistedView> for View {
+    fn from(value: PersistedView) -> Self {
+        match value {
+            PersistedView::Text => View::Text,
+            PersistedView::Hex => View::Hex,
+            PersistedView::Plot => View::Plot,
+        }
+    }
+}
+
+pub fn load_tui_state() -> PersistedTuiState {
+    match load_tui_state_from_path(&tui_state_path()) {
+        Ok(mut state) => {
+            if state.session.pipelines.is_empty() {
+                state.session = default_session();
+            }
+            state
+        }
+        Err(err) if err.kind() == io::ErrorKind::NotFound => PersistedTuiState::default(),
+        Err(err) => {
+            warn!(error = %err, "Failed to load persisted TUI state");
+            PersistedTuiState::default()
+        }
+    }
+}
+
+pub fn save_tui_state(session: &SessionConfig, view: View, display: DisplayOptions) {
+    let state = PersistedTuiState {
+        session: session.clone(),
+        active_view: view.into(),
+        show_timestamp: display.show_timestamp,
+        show_direction: display.show_direction,
+        show_pipeline: display.show_pipeline,
+    };
+
+    if let Err(err) = save_tui_state_to_path(&state, &tui_state_path()) {
+        warn!(error = %err, "Failed to persist TUI state");
+    }
+}
+
+fn default_session() -> SessionConfig {
+    default_session_config()
+}
+
+fn tui_state_path() -> PathBuf {
+    state_path_for_os_and_env(env::consts::OS, |key| env::var(key).ok())
+}
+
+pub fn config_dir() -> PathBuf {
+    tui_state_path()
+        .parent()
+        .map(Path::to_path_buf)
+        .unwrap_or_else(|| PathBuf::from("."))
+}
+
+fn state_path_for_os_and_env(os: &str, get_env: impl Fn(&str) -> Option<String>) -> PathBuf {
+    match os {
+        "windows" => {
+            if let Some(path) = get_env("APPDATA").filter(|path| !path.trim().is_empty()) {
+                return PathBuf::from(path)
+                    .join("pipeview")
+                    .join(TUI_STATE_FILE_NAME);
+            }
+            if let Some(path) = get_env("LOCALAPPDATA").filter(|path| !path.trim().is_empty()) {
+                return PathBuf::from(path)
+                    .join("pipeview")
+                    .join(TUI_STATE_FILE_NAME);
+            }
+        }
+        "macos" => {
+            if let Some(home) = get_env("HOME").filter(|path| !path.trim().is_empty()) {
+                return PathBuf::from(home)
+                    .join("Library")
+                    .join("Application Support")
+                    .join("pipeview")
+                    .join(TUI_STATE_FILE_NAME);
+            }
+        }
+        _ => {
+            if let Some(path) = get_env("XDG_CONFIG_HOME").filter(|path| !path.trim().is_empty()) {
+                return PathBuf::from(path)
+                    .join("pipeview")
+                    .join(TUI_STATE_FILE_NAME);
+            }
+            if let Some(home) = get_env("HOME").filter(|path| !path.trim().is_empty()) {
+                return PathBuf::from(home)
+                    .join(".config")
+                    .join("pipeview")
+                    .join(TUI_STATE_FILE_NAME);
+            }
+        }
+    }
+
+    PathBuf::from(TUI_STATE_FILE_NAME)
+}
+
+fn load_tui_state_from_path(path: &Path) -> io::Result<PersistedTuiState> {
+    let text = fs::read_to_string(path)?;
+    serde_json::from_str(&text).map_err(io::Error::other)
+}
+
+fn save_tui_state_to_path(state: &PersistedTuiState, path: &Path) -> io::Result<()> {
+    if let Some(parent) = path.parent() {
+        fs::create_dir_all(parent)?;
+    }
+    let json = serde_json::to_string_pretty(state).map_err(io::Error::other)?;
+    fs::write(path, json)
+}
+
+const fn default_true() -> bool {
+    true
+}

crates/pipeview-tui/src/buffers.rs

@@ -0,0 +1,637 @@
+use std::collections::VecDeque;
+use std::time::{Duration, Instant};
+
+use pipeview_client::{DecodedEntry, RingBuffer};
+use pipeview_core::protocol::DecodedData;
+use pipeview_core::protocol::plot::{PlotFormat, PlotFrame};
+
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub enum LineDirection {
+    In,
+    Out,
+}
+
+#[derive(Clone)]
+pub struct ConsoleLine {
+    pub elapsed: Duration,
+    pub pipeline: String,
+    pub text: String,
+    pub direction: LineDirection,
+}
+
+pub struct TextBuffer {
+    started_at: Instant,
+    lines: RingBuffer<ConsoleLine>,
+}
+
+impl TextBuffer {
+    pub fn new(limit: usize) -> Self {
+        Self {
+            started_at: Instant::now(),
+            lines: RingBuffer::new(limit),
+        }
+    }
+
+    pub fn push(&mut self, entry: &DecodedEntry) {
+        if let DecodedData::Text(text) = &entry.data {
+            self.lines.push(ConsoleLine {
+                elapsed: self.started_at.elapsed(),
+                pipeline: entry.pipeline_name.clone(),
+                text: text.clone(),
+                direction: LineDirection::In,
+            });
+        }
+    }
+
+    pub fn push_outbound(&mut self, text: String) {
+        self.lines.push(ConsoleLine {
+            elapsed: self.started_at.elapsed(),
+            pipeline: String::from("OUT"),
+            text,
+            direction: LineDirection::Out,
+        });
+    }
+
+    pub fn get(&self, index: usize) -> Option<&ConsoleLine> {
+        self.lines.get(index)
+    }
+
+    pub fn len(&self) -> usize {
+        self.lines.len()
+    }
+
+    pub fn clear(&mut self) {
+        self.lines.clear();
+    }
+
+    pub fn set_limit(&mut self, limit: usize) {
+        self.lines.set_limit(limit);
+    }
+}
+
+#[derive(Clone)]
+pub struct HexLine {
+    pub elapsed: Duration,
+    pub pipeline: String,
+    pub hex: String,
+    pub ascii: String,
+    pub direction: LineDirection,
+}
+
+pub struct HexBuffer {
+    started_at: Instant,
+    lines: RingBuffer<HexLine>,
+}
+
+impl HexBuffer {
+    pub fn new(limit: usize) -> Self {
+        Self {
+            started_at: Instant::now(),
+            lines: RingBuffer::new(limit),
+        }
+    }
+
+    pub fn push(&mut self, entry: &DecodedEntry) {
+        if let DecodedData::Hex(hex) = &entry.data {
+            self.lines.push(HexLine {
+                elapsed: self.started_at.elapsed(),
+                pipeline: entry.pipeline_name.clone(),
+                ascii: decode_ascii(hex),
+                hex: hex.clone(),
+                direction: LineDirection::In,
+            });
+        }
+    }
+
+    pub fn push_outbound(&mut self, hex: String) {
+        self.lines.push(HexLine {
+            elapsed: self.started_at.elapsed(),
+            pipeline: String::from("OUT"),
+            ascii: decode_ascii(&hex),
+            hex,
+            direction: LineDirection::Out,
+        });
+    }
+
+    pub fn get(&self, index: usize) -> Option<&HexLine> {
+        self.lines.get(index)
+    }
+
+    pub fn len(&self) -> usize {
+        self.lines.len()
+    }
+
+    pub fn clear(&mut self) {
+        self.lines.clear();
+    }
+
+    pub fn set_limit(&mut self, limit: usize) {
+        self.lines.set_limit(limit);
+    }
+}
+
+pub struct PlotSeries {
+    pub name: String,
+    points: VecDeque<[f64; 2]>,
+    next_x: f64,
+}
+
+impl PlotSeries {
+    fn new(name: String) -> Self {
+        Self {
+            name,
+            points: VecDeque::new(),
+            next_x: 0.0,
+        }
+    }
+
+    fn push_samples(&mut self, samples: &[f64], limit: usize) {
+        for sample in samples {
+            if !sample.is_finite() {
+                continue;
+            }
+            self.push_point([self.next_x, *sample], limit);
+            self.next_x += 1.0;
+        }
+    }
+
+    fn push_point(&mut self, point: [f64; 2], limit: usize) -> Option<[f64; 2]> {
+        self.points.push_back(point);
+        if self.points.len() > limit {
+            self.points.pop_front()
+        } else {
+            None
+        }
+    }
+
+    pub fn points(&self) -> impl Iterator<Item = [f64; 2]> + '_ {
+        self.points.iter().copied()
+    }
+
+    pub fn len(&self) -> usize {
+        self.points.len()
+    }
+
+    fn first_point(&self) -> Option<[f64; 2]> {
+        self.points.front().copied()
+    }
+
+    fn last_point(&self) -> Option<[f64; 2]> {
+        self.points.back().copied()
+    }
+
+    pub fn render_points_time_series(
+        &self,
+        x_min: f64,
+        x_max: f64,
+        max_points: usize,
+    ) -> Vec<[f64; 2]> {
+        if self.points.is_empty() || max_points == 0 {
+            return Vec::new();
+        }
+
+        let mut exact_visible = Vec::with_capacity(max_points.min(self.points.len()));
+        for point in self.points.iter().copied() {
+            if point[0] < x_min {
+                continue;
+            }
+            if point[0] > x_max {
+                break;
+            }
+            exact_visible.push(point);
+            if exact_visible.len() > max_points {
+                exact_visible.clear();
+                break;
+            }
+        }
+        if !exact_visible.is_empty() {
+            return exact_visible;
+        }
+
+        let bucket_count = (max_points / 2).max(1);
+        let width = (x_max - x_min).max(1.0);
+        let bucket_width = width / bucket_count as f64;
+        let mut rendered = Vec::with_capacity(bucket_count * 2);
+        let mut points = self
+            .points
+            .iter()
+            .copied()
+            .skip_while(|point| point[0] < x_min)
+            .peekable();
+
+        for bucket_index in 0..bucket_count {
+            let bucket_start = x_min + bucket_width * bucket_index as f64;
+            let bucket_end = if bucket_index + 1 == bucket_count {
+                x_max
+            } else {
+                bucket_start + bucket_width
+            };
+
+            let mut min_point: Option<[f64; 2]> = None;
+            let mut max_point: Option<[f64; 2]> = None;
+
+            while let Some(point) = points.peek().copied() {
+                if point[0] > bucket_end {
+                    break;
+                }
+                if point[0] >= bucket_start {
+                    match min_point {
+                        Some(current) if current[1] <= point[1] => {}
+                        _ => min_point = Some(point),
+                    }
+                    match max_point {
+                        Some(current) if current[1] >= point[1] => {}
+                        _ => max_point = Some(point),
+                    }
+                }
+                points.next();
+            }
+
+            match (min_point, max_point) {
+                (Some(a), Some(b)) if a[0] <= b[0] => {
+                    rendered.push(a);
+                    if a != b {
+                        rendered.push(b);
+                    }
+                }
+                (Some(a), Some(b)) => {
+                    rendered.push(b);
+                    if a != b {
+                        rendered.push(a);
+                    }
+                }
+                (Some(a), None) | (None, Some(a)) => rendered.push(a),
+                (None, None) => {}
+            }
+        }
+
+        if rendered.len() > max_points {
+            let stride = rendered.len().div_ceil(max_points);
+            rendered.into_iter().step_by(stride).collect()
+        } else {
+            rendered
+        }
+    }
+
+    pub fn render_points_xy(&self, max_points: usize) -> Vec<[f64; 2]> {
+        if self.points.is_empty() || max_points == 0 {
+            return Vec::new();
+        }
+        if self.points.len() <= max_points {
+            return self.points.iter().copied().collect();
+        }
+
+        let stride = self.points.len().div_ceil(max_points);
+        self.points.iter().copied().step_by(stride).collect()
+    }
+}
+
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub enum PlotSeriesKind {
+    TimeSeries,
+    XY,
+}
+
+#[derive(Clone, Copy)]
+struct BoundsRect {
+    min_x: f64,
+    max_x: f64,
+    min_y: f64,
+    max_y: f64,
+}
+
+impl BoundsRect {
+    fn from_point([x, y]: [f64; 2]) -> Option<Self> {
+        if !(x.is_finite() && y.is_finite()) {
+            return None;
+        }
+        Some(Self {
+            min_x: x,
+            max_x: x,
+            min_y: y,
+            max_y: y,
+        })
+    }
+
+    fn extend_with_point(&mut self, [x, y]: [f64; 2]) {
+        if !(x.is_finite() && y.is_finite()) {
+            return;
+        }
+        self.min_x = self.min_x.min(x);
+        self.max_x = self.max_x.max(x);
+        self.min_y = self.min_y.min(y);
+        self.max_y = self.max_y.max(y);
+    }
+
+    fn touches(&self, [x, y]: [f64; 2]) -> bool {
+        x == self.min_x || x == self.max_x || y == self.min_y || y == self.max_y
+    }
+}
+
+pub struct PlotBuffer {
+    limit: usize,
+    kind: PlotSeriesKind,
+    series: Vec<PlotSeries>,
+    time_series_y_bounds: Option<(f64, f64)>,
+    time_series_y_dirty: bool,
+    xy_bounds: Option<BoundsRect>,
+    xy_bounds_dirty: bool,
+}
+
+impl PlotBuffer {
+    pub fn new(limit: usize) -> Self {
+        Self {
+            limit,
+            kind: PlotSeriesKind::TimeSeries,
+            series: Vec::new(),
+            time_series_y_bounds: None,
+            time_series_y_dirty: false,
+            xy_bounds: None,
+            xy_bounds_dirty: false,
+        }
+    }
+
+    pub fn push(&mut self, entry: &DecodedEntry) {
+        if let DecodedData::Plot(frame) = &entry.data {
+            self.push_frame(&entry.pipeline_name, frame);
+        }
+    }
+
+    fn push_frame(&mut self, pipeline_name: &str, frame: &PlotFrame) {
+        let next_kind = match frame.format {
+            PlotFormat::XY => PlotSeriesKind::XY,
+            PlotFormat::Interleaved | PlotFormat::Block => PlotSeriesKind::TimeSeries,
+        };
+        if self.kind != next_kind {
+            self.invalidate_bounds();
+        }
+        self.kind = next_kind;
+
+        if matches!(frame.format, PlotFormat::XY) {
+            self.push_xy_frame(pipeline_name, frame);
+            return;
+        }
+
+        for (index, channel) in frame.channels.iter().enumerate() {
+            let series_name = if frame.channels.len() == 1 {
+                pipeline_name.to_owned()
+            } else {
+                format!("{pipeline_name}:ch{}", index + 1)
+            };
+
+            if let Some(series_index) = self
+                .series
+                .iter()
+                .position(|series| series.name == series_name)
+            {
+                for sample in channel {
+                    if !sample.is_finite() {
+                        continue;
+                    }
+                    let (point, removed) = {
+                        let series = &mut self.series[series_index];
+                        let point = [series.next_x, *sample];
+                        let removed = series.push_point(point, self.limit);
+                        series.next_x += 1.0;
+                        (point, removed)
+                    };
+                    if let Some(removed) = removed {
+                        self.note_time_series_removed(removed);
+                    }
+                    self.note_time_series_point(point);
+                }
+            } else {
+                let mut series = PlotSeries::new(series_name);
+                series.push_samples(channel, self.limit);
+                for point in series.points() {
+                    self.note_time_series_point(point);
+                }
+                self.series.push(series);
+            }
+        }
+    }
+
+    fn push_xy_frame(&mut self, pipeline_name: &str, frame: &PlotFrame) {
+        if frame.channels.len() < 2 {
+            return;
+        }
+
+        let x = &frame.channels[0];
+        let y = &frame.channels[1];
+        let len = x.len().min(y.len());
+        let series_name = format!("{pipeline_name}:xy");
+
+        let series_index = if let Some(index) = self
+            .series
+            .iter()
+            .position(|series| series.name == series_name)
+        {
+            index
+        } else {
+            self.series.push(PlotSeries::new(series_name));
+            self.series.len() - 1
+        };
+
+        for index in 0..len {
+            if !x[index].is_finite() || !y[index].is_finite() {
+                continue;
+            }
+            let point = [x[index], y[index]];
+            let removed = {
+                let series = &mut self.series[series_index];
+                series.push_point(point, self.limit)
+            };
+            if let Some(removed) = removed {
+                self.note_xy_removed(removed);
+            }
+            self.note_xy_point(point);
+        }
+    }
+
+    pub fn clear(&mut self) {
+        self.series.clear();
+        self.invalidate_bounds();
+    }
+
+    pub fn set_limit(&mut self, limit: usize) {
+        self.limit = limit;
+        for series in &mut self.series {
+            while series.points.len() > self.limit {
+                series.points.pop_front();
+            }
+        }
+        self.invalidate_bounds();
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.series.is_empty()
+    }
+
+    pub fn kind(&self) -> PlotSeriesKind {
+        self.kind
+    }
+
+    pub fn iter(&self) -> impl Iterator<Item = &PlotSeries> {
+        self.series.iter()
+    }
+
+    pub fn series_len(&self) -> usize {
+        self.series.len()
+    }
+
+    pub fn total_points(&self) -> usize {
+        self.series.iter().map(PlotSeries::len).sum()
+    }
+
+    pub fn bounds(&mut self) -> Option<([f64; 2], [f64; 2])> {
+        match self.kind {
+            PlotSeriesKind::TimeSeries => self.time_series_bounds(),
+            PlotSeriesKind::XY => self.xy_bounds(),
+        }
+    }
+
+    fn invalidate_bounds(&mut self) {
+        self.time_series_y_bounds = None;
+        self.time_series_y_dirty = false;
+        self.xy_bounds = None;
+        self.xy_bounds_dirty = false;
+    }
+
+    fn note_time_series_point(&mut self, point: [f64; 2]) {
+        if !point[1].is_finite() {
+            return;
+        }
+        match &mut self.time_series_y_bounds {
+            Some((min_y, max_y)) => {
+                *min_y = min_y.min(point[1]);
+                *max_y = max_y.max(point[1]);
+            }
+            None => self.time_series_y_bounds = Some((point[1], point[1])),
+        }
+    }
+
+    fn note_time_series_removed(&mut self, removed: [f64; 2]) {
+        if let Some((min_y, max_y)) = self.time_series_y_bounds
+            && (removed[1] == min_y || removed[1] == max_y)
+        {
+            self.time_series_y_dirty = true;
+        }
+    }
+
+    fn note_xy_point(&mut self, point: [f64; 2]) {
+        match &mut self.xy_bounds {
+            Some(bounds) => bounds.extend_with_point(point),
+            None => self.xy_bounds = BoundsRect::from_point(point),
+        }
+    }
+
+    fn note_xy_removed(&mut self, removed: [f64; 2]) {
+        if let Some(bounds) = self.xy_bounds
+            && bounds.touches(removed)
+        {
+            self.xy_bounds_dirty = true;
+        }
+    }
+
+    fn time_series_bounds(&mut self) -> Option<([f64; 2], [f64; 2])> {
+        let mut min_x = f64::INFINITY;
+        let mut max_x = f64::NEG_INFINITY;
+
+        for series in &self.series {
+            if let Some([x, _]) = series.first_point() {
+                min_x = min_x.min(x);
+            }
+            if let Some([x, _]) = series.last_point() {
+                max_x = max_x.max(x);
+            }
+        }
+
+        if !(min_x.is_finite() && max_x.is_finite()) {
+            return None;
+        }
+
+        if self.time_series_y_dirty {
+            self.recompute_time_series_y_bounds();
+        }
+        let (mut min_y, mut max_y) = self.time_series_y_bounds?;
+        if min_y == max_y {
+            min_y -= 1.0;
+            max_y += 1.0;
+        }
+        Some(([min_x, min_y], [max_x, max_y]))
+    }
+
+    fn xy_bounds(&mut self) -> Option<([f64; 2], [f64; 2])> {
+        if self.xy_bounds_dirty {
+            self.recompute_xy_bounds();
+        }
+        let bounds = self.xy_bounds?;
+        let mut min_x = bounds.min_x;
+        let mut max_x = bounds.max_x;
+        let mut min_y = bounds.min_y;
+        let mut max_y = bounds.max_y;
+        if min_x == max_x {
+            min_x -= 1.0;
+            max_x += 1.0;
+        }
+        if min_y == max_y {
+            min_y -= 1.0;
+            max_y += 1.0;
+        }
+        Some(([min_x, min_y], [max_x, max_y]))
+    }
+
+    fn recompute_time_series_y_bounds(&mut self) {
+        let mut min_y = f64::INFINITY;
+        let mut max_y = f64::NEG_INFINITY;
+
+        for series in &self.series {
+            for [_, y] in series.points() {
+                if y.is_finite() {
+                    min_y = min_y.min(y);
+                    max_y = max_y.max(y);
+                }
+            }
+        }
+
+        self.time_series_y_bounds = if min_y.is_finite() && max_y.is_finite() {
+            Some((min_y, max_y))
+        } else {
+            None
+        };
+        self.time_series_y_dirty = false;
+    }
+
+    fn recompute_xy_bounds(&mut self) {
+        let mut bounds: Option<BoundsRect> = None;
+
+        for series in &self.series {
+            for point in series.points() {
+                match &mut bounds {
+                    Some(existing) => existing.extend_with_point(point),
+                    None => bounds = BoundsRect::from_point(point),
+                }
+            }
+        }
+
+        self.xy_bounds = bounds;
+        self.xy_bounds_dirty = false;
+    }
+}
+
+fn decode_ascii(hex: &str) -> String {
+    hex::decode(hex.replace(' ', ""))
+        .map(|bytes| {
+            bytes
+                .into_iter()
+                .map(|byte| {
+                    if byte.is_ascii_graphic() || byte == b' ' {
+                        byte as char
+                    } else {
+                        '.'
+                    }
+                })
+                .collect()
+        })
+        .unwrap_or_else(|_| String::from("[invalid hex]"))
+}

crates/pipeview-tui/src/main.rs

@@ -0,0 +1,65 @@
+mod ansi;
+mod app;
+mod app_state;
+mod buffers;
+mod ui;
+
+use std::io;
+
+use crossterm::{
+    event::{DisableMouseCapture, EnableMouseCapture},
+    execute,
+    terminal::{EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode},
+};
+use ratatui::{Terminal, backend::CrosstermBackend};
+use tracing_appender::non_blocking::WorkerGuard;
+use tracing_subscriber::{EnvFilter, fmt};
+
+use crate::app::App;
+
+#[tokio::main]
+async fn main() -> io::Result<()> {
+    let _log_guard = init_tracing();
+
+    enable_raw_mode()?;
+    let mut stdout = io::stdout();
+    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
+    let backend = CrosstermBackend::new(stdout);
+    let mut terminal = Terminal::new(backend)?;
+
+    let result = async {
+        let mut app = App::new();
+        app.run(&mut terminal).await?;
+        app.shutdown().await;
+        io::Result::Ok(())
+    }
+    .await;
+
+    disable_raw_mode()?;
+    execute!(
+        terminal.backend_mut(),
+        LeaveAlternateScreen,
+        DisableMouseCapture
+    )?;
+    terminal.show_cursor()?;
+
+    result
+}
+
+fn init_tracing() -> Option<WorkerGuard> {
+    let filter = EnvFilter::try_from_default_env()
+        .unwrap_or_else(|_| EnvFilter::new("pipeview_tui=info,pipeview_client=info"));
+    let log_dir = app_state::config_dir();
+    let _ = std::fs::create_dir_all(&log_dir);
+    let file_appender = tracing_appender::rolling::never(log_dir, "tui.log");
+    let (writer, guard) = tracing_appender::non_blocking(file_appender);
+
+    fmt()
+        .with_env_filter(filter)
+        .with_target(false)
+        .with_ansi(false)
+        .with_writer(writer)
+        .try_init()
+        .ok()
+        .map(|_| guard)
+}

crates/pipeview-tui/src/ui.rs

@@ -0,0 +1,989 @@
+use std::time::Duration;
+
+use ratatui::{
+    Frame,
+    layout::{Alignment, Constraint, Direction, Layout, Rect},
+    style::{Color, Modifier, Style},
+    symbols::Marker,
+    text::{Line, Span},
+    widgets::{
+        Axis, Block, Borders, Chart, Clear, Dataset, GraphType, List, ListItem, Paragraph, Wrap,
+    },
+};
+
+use crate::ansi::ansi_to_spans;
+use crate::app::{
+    App, AppMode, ConfigField, ConnectionStatus, DisplayOptions, FocusPane, HotAction, LineEnding,
+    SendMode, View,
+};
+use crate::buffers::{ConsoleLine, HexLine, LineDirection, PlotSeriesKind};
+
+const BG: Color = Color::Rgb(8, 12, 18);
+const PANEL: Color = Color::Rgb(12, 20, 28);
+const PANEL_ALT: Color = Color::Rgb(17, 27, 38);
+const CYAN: Color = Color::Rgb(55, 214, 230);
+const GREEN: Color = Color::Rgb(72, 211, 137);
+const AMBER: Color = Color::Rgb(244, 184, 74);
+const MAGENTA: Color = Color::Rgb(219, 111, 220);
+const RED: Color = Color::Rgb(238, 92, 107);
+const BLUE: Color = Color::Rgb(96, 165, 250);
+const MUTED: Color = Color::Rgb(120, 134, 153);
+const TEXT: Color = Color::Rgb(224, 234, 244);
+
+pub fn render(frame: &mut Frame, app: &mut App) {
+    app.reset_hot_zones();
+    let area = frame.area();
+    frame.render_widget(Block::default().style(Style::default().bg(BG)), area);
+
+    let root = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(4),
+            Constraint::Min(10),
+            Constraint::Length(6),
+            Constraint::Length(2),
+        ])
+        .split(area);
+
+    render_header(frame, app, root[0]);
+
+    let body = Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints([Constraint::Length(34), Constraint::Min(30)])
+        .split(root[1]);
+    render_controls(frame, app, body[0]);
+    render_main(frame, app, body[1]);
+    render_composer(frame, app, root[2]);
+    render_footer(frame, app, root[3]);
+
+    match app.mode {
+        AppMode::Search => render_search_modal(frame, app),
+        AppMode::Config => render_config_modal(frame, app),
+        AppMode::Help => render_help_modal(frame, app),
+        AppMode::Normal | AppMode::EditingSend => {}
+    }
+}
+
+fn render_header(frame: &mut Frame, app: &App, area: Rect) {
+    let status = &app.session.status;
+    let status_color = status_color(status);
+    let error = match status {
+        ConnectionStatus::Error(message) => format!("  {message}"),
+        _ => String::new(),
+    };
+
+    let header = vec![
+        Line::from(vec![
+            Span::styled(
+                " PIPEVIEW ",
+                Style::default()
+                    .fg(Color::Black)
+                    .bg(CYAN)
+                    .add_modifier(Modifier::BOLD),
+            ),
+            Span::raw(" "),
+            Span::styled(
+                "single session telemetry console",
+                Style::default().fg(TEXT).add_modifier(Modifier::BOLD),
+            ),
+            Span::raw("  "),
+            Span::styled(
+                status.label(),
+                Style::default()
+                    .fg(Color::Black)
+                    .bg(status_color)
+                    .add_modifier(Modifier::BOLD),
+            ),
+            Span::styled(error, Style::default().fg(RED)),
+        ]),
+        Line::from(vec![
+            Span::styled(app.transport_summary(), Style::default().fg(AMBER)),
+            Span::raw("  |  pipelines: "),
+            Span::styled(app.pipeline_summary(), Style::default().fg(MAGENTA)),
+            Span::raw("  |  view: "),
+            Span::styled(
+                app.session.view.label(),
+                Style::default().fg(view_color(app.session.view)),
+            ),
+            Span::raw("  |  rx/tx: "),
+            Span::styled(
+                format!(
+                    "{}/{}",
+                    app.session.received_messages, app.session.sent_messages
+                ),
+                Style::default().fg(GREEN),
+            ),
+        ]),
+    ];
+
+    frame.render_widget(
+        Paragraph::new(header)
+            .block(panel_block("Status", false, CYAN))
+            .wrap(Wrap { trim: false }),
+        area,
+    );
+}
+
+fn render_controls(frame: &mut Frame, app: &mut App, area: Rect) {
+    app.add_hot_zone(area, HotAction::Focus(FocusPane::Controls));
+    let focused = app.focus == FocusPane::Controls;
+    let block = panel_block("Control Deck", focused, AMBER);
+    let inner = block.inner(area);
+    frame.render_widget(block, area);
+
+    let connect_label = if app.session.status.is_connectedish() {
+        "[ Disconnect ]"
+    } else {
+        "[ Connect ]"
+    };
+    let ending = next_line_ending(app.session.line_ending);
+    let rows: Vec<(Line<'static>, Option<HotAction>)> = vec![
+        section_line("SESSION"),
+        button_line(
+            connect_label,
+            status_color(&app.session.status),
+            Some(HotAction::ToggleConnection),
+        ),
+        button_line("[ Reconnect ]", BLUE, Some(HotAction::Reconnect)),
+        button_line("[ Clear Buffers ]", RED, Some(HotAction::Clear)),
+        button_line("[ Configure ]", MAGENTA, Some(HotAction::OpenConfig)),
+        spacer_line(),
+        section_line("LINES"),
+        toggle_line(
+            "Auto reconnect",
+            app.session.auto_reconnect,
+            Some(HotAction::ToggleAutoReconnect),
+        ),
+        toggle_line("DTR", app.session.dtr, Some(HotAction::ToggleDtr)),
+        toggle_line("RTS", app.session.rts, Some(HotAction::ToggleRts)),
+        spacer_line(),
+        section_line("DISPLAY"),
+        toggle_line(
+            "Timestamp",
+            app.display.show_timestamp,
+            Some(HotAction::ToggleTimestamp),
+        ),
+        toggle_line(
+            "Direction",
+            app.display.show_direction,
+            Some(HotAction::ToggleDirection),
+        ),
+        toggle_line(
+            "Pipeline",
+            app.display.show_pipeline,
+            Some(HotAction::TogglePipeline),
+        ),
+        spacer_line(),
+        section_line("SEND"),
+        value_line(
+            "Mode",
+            app.session.send_mode.label(),
+            Some(HotAction::SendMode(match app.session.send_mode {
+                SendMode::Text => SendMode::Hex,
+                SendMode::Hex => SendMode::Text,
+            })),
+        ),
+        value_line(
+            "Ending",
+            app.session.line_ending.label(),
+            Some(HotAction::LineEnding(ending)),
+        ),
+        button_line("[ Search ]", CYAN, Some(HotAction::OpenSearch)),
+        button_line("[ Help ]", MUTED, Some(HotAction::OpenHelp)),
+    ];
+
+    for (index, (_, action)) in rows.iter().enumerate() {
+        if let Some(action) = action {
+            let y = inner.y.saturating_add(index as u16);
+            if y < inner.y.saturating_add(inner.height) {
+                app.add_hot_zone(
+                    Rect {
+                        x: inner.x,
+                        y,
+                        width: inner.width,
+                        height: 1,
+                    },
+                    *action,
+                );
+            }
+        }
+    }
+
+    frame.render_widget(
+        Paragraph::new(rows.into_iter().map(|(line, _)| line).collect::<Vec<_>>())
+            .style(Style::default().fg(TEXT).bg(PANEL)),
+        inner,
+    );
+}
+
+fn render_main(frame: &mut Frame, app: &mut App, area: Rect) {
+    app.add_hot_zone(area, HotAction::Focus(FocusPane::Main));
+    let layout = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([Constraint::Length(3), Constraint::Min(5)])
+        .split(area);
+
+    render_tabs(frame, app, layout[0]);
+    match app.session.view {
+        View::Text => render_text_view(frame, app, layout[1]),
+        View::Hex => render_hex_view(frame, app, layout[1]),
+        View::Plot => render_plot_view(frame, app, layout[1]),
+    }
+}
+
+fn render_tabs(frame: &mut Frame, app: &mut App, area: Rect) {
+    let chunks = Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints([
+            Constraint::Percentage(34),
+            Constraint::Percentage(33),
+            Constraint::Percentage(33),
+        ])
+        .split(area);
+
+    for (idx, view) in View::ALL.into_iter().enumerate() {
+        let selected = app.session.view == view;
+        app.add_hot_zone(chunks[idx], HotAction::View(view));
+        let color = view_color(view);
+        let block = panel_block(view.label(), selected, color);
+        frame.render_widget(
+            Paragraph::new(Line::from(vec![
+                Span::styled(
+                    view.label(),
+                    Style::default()
+                        .fg(if selected { Color::Black } else { color })
+                        .bg(if selected { color } else { PANEL })
+                        .add_modifier(Modifier::BOLD),
+                ),
+                Span::styled(
+                    match view {
+                        View::Text => format!("  {} lines", app.session.console.len()),
+                        View::Hex => format!("  {} lines", app.session.hex.len()),
+                        View::Plot => format!(
+                            "  {} series / {} pts",
+                            app.session.plot.series_len(),
+                            app.session.plot.total_points()
+                        ),
+                    },
+                    Style::default().fg(MUTED),
+                ),
+            ]))
+            .block(block)
+            .alignment(Alignment::Center),
+            chunks[idx],
+        );
+    }
+}
+
+fn render_text_view(frame: &mut Frame, app: &mut App, area: Rect) {
+    let focused = app.focus == FocusPane::Main;
+    let block = panel_block("Text Stream", focused, CYAN);
+    let inner = block.inner(area);
+    let height = inner.height as usize;
+    let total = app.session.console.len();
+    let start = app.visible_start(total, height);
+    let end = start.saturating_add(height).min(total);
+
+    let lines = if total == 0 {
+        vec![Line::styled("no text data", Style::default().fg(MUTED))]
+    } else {
+        (start..end)
+            .filter_map(|index| {
+                app.session
+                    .console
+                    .get(index)
+                    .map(|line| format_console_line(index, line, app.display, app))
+            })
+            .collect()
+    };
+
+    frame.render_widget(
+        Paragraph::new(lines)
+            .block(block)
+            .style(Style::default().bg(PANEL_ALT))
+            .wrap(Wrap { trim: false }),
+        area,
+    );
+}
+
+fn render_hex_view(frame: &mut Frame, app: &mut App, area: Rect) {
+    let focused = app.focus == FocusPane::Main;
+    let block = panel_block("Hex Stream", focused, AMBER);
+    let inner = block.inner(area);
+    let height = inner.height as usize;
+    let total = app.session.hex.len();
+    let start = app.visible_start(total, height);
+    let end = start.saturating_add(height).min(total);
+
+    let lines = if total == 0 {
+        vec![Line::styled("no hex data", Style::default().fg(MUTED))]
+    } else {
+        (start..end)
+            .filter_map(|index| {
+                app.session
+                    .hex
+                    .get(index)
+                    .map(|line| format_hex_line(index, line, app.display, app))
+            })
+            .collect()
+    };
+
+    frame.render_widget(
+        Paragraph::new(lines)
+            .block(block)
+            .style(Style::default().bg(PANEL_ALT))
+            .wrap(Wrap { trim: false }),
+        area,
+    );
+}
+
+fn render_plot_view(frame: &mut Frame, app: &mut App, area: Rect) {
+    let focused = app.focus == FocusPane::Main;
+    let block = panel_block("Plot View", focused, GREEN);
+    let inner = block.inner(area);
+    app.add_hot_zone(inner, HotAction::Focus(FocusPane::Main));
+
+    if app.session.plot.is_empty() {
+        frame.render_widget(
+            Paragraph::new(vec![
+                Line::styled("no plot data", Style::default().fg(MUTED)),
+                Line::from(vec![
+                    Span::raw("pipeline: "),
+                    Span::styled(app.pipeline_summary(), Style::default().fg(MAGENTA)),
+                ]),
+            ])
+            .block(block)
+            .style(Style::default().bg(PANEL_ALT))
+            .alignment(Alignment::Center),
+            area,
+        );
+        return;
+    }
+
+    let Some((min, max)) = app.plot_bounds() else {
+        frame.render_widget(
+            Paragraph::new("plot bounds unavailable")
+                .block(block)
+                .style(Style::default().fg(MUTED).bg(PANEL_ALT)),
+            area,
+        );
+        return;
+    };
+
+    let max_points = (inner.width as usize).saturating_mul(2).max(32);
+    let kind = app.session.plot.kind();
+    let series_points: Vec<(String, Vec<(f64, f64)>)> = app
+        .session
+        .plot
+        .iter()
+        .map(|series| {
+            let points = match kind {
+                PlotSeriesKind::TimeSeries => {
+                    series.render_points_time_series(min[0], max[0], max_points)
+                }
+                PlotSeriesKind::XY => series.render_points_xy(max_points),
+            };
+            (
+                series.name.clone(),
+                points.into_iter().map(|[x, y]| (x, y)).collect(),
+            )
+        })
+        .collect();
+
+    let palette = [GREEN, CYAN, AMBER, MAGENTA, BLUE, RED];
+    let datasets = series_points
+        .iter()
+        .enumerate()
+        .map(|(index, (name, points))| {
+            Dataset::default()
+                .name(name.as_str())
+                .marker(Marker::Braille)
+                .graph_type(GraphType::Line)
+                .style(Style::default().fg(palette[index % palette.len()]))
+                .data(points)
+        })
+        .collect::<Vec<_>>();
+
+    let chart = Chart::new(datasets)
+        .block(block)
+        .style(Style::default().bg(PANEL_ALT))
+        .x_axis(axis("X", min[0], max[0], CYAN))
+        .y_axis(axis("Y", min[1], max[1], GREEN));
+
+    frame.render_widget(chart, area);
+
+    let overlay = Rect {
+        x: inner.x.saturating_add(1),
+        y: inner.y,
+        width: inner.width.saturating_sub(2).min(72),
+        height: 1,
+    };
+    let controls = Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints([
+            Constraint::Length(16),
+            Constraint::Length(10),
+            Constraint::Length(10),
+            Constraint::Min(1),
+        ])
+        .split(overlay);
+    app.add_hot_zone(controls[0], HotAction::PlotFollow);
+    app.add_hot_zone(controls[1], HotAction::PlotZoomIn);
+    app.add_hot_zone(controls[2], HotAction::PlotZoomOut);
+    let mode = match kind {
+        PlotSeriesKind::TimeSeries => "time",
+        PlotSeriesKind::XY => "xy",
+    };
+    frame.render_widget(
+        Paragraph::new(Line::from(vec![
+            Span::styled(
+                format!(
+                    "[follow {}] ",
+                    if app.plot.follow_latest { "on" } else { "off" }
+                ),
+                Style::default()
+                    .fg(Color::Black)
+                    .bg(if app.plot.follow_latest { GREEN } else { MUTED })
+                    .add_modifier(Modifier::BOLD),
+            ),
+            Span::styled("[zoom +] ", Style::default().fg(Color::Black).bg(CYAN)),
+            Span::styled("[zoom -] ", Style::default().fg(Color::Black).bg(AMBER)),
+            Span::styled(format!("{mode} "), Style::default().fg(MUTED)),
+            Span::styled(
+                format!(
+                    "{} series / {} pts",
+                    app.session.plot.series_len(),
+                    app.session.plot.total_points()
+                ),
+                Style::default().fg(TEXT),
+            ),
+        ]))
+        .style(Style::default().bg(PANEL_ALT)),
+        overlay,
+    );
+}
+
+fn render_composer(frame: &mut Frame, app: &mut App, area: Rect) {
+    app.add_hot_zone(area, HotAction::Focus(FocusPane::Composer));
+    let focused = app.focus == FocusPane::Composer || matches!(app.mode, AppMode::EditingSend);
+    let block = panel_block("Composer", focused, MAGENTA);
+    let inner = block.inner(area);
+    frame.render_widget(block, area);
+
+    let chunks = Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints([Constraint::Min(20), Constraint::Length(28)])
+        .split(inner);
+
+    let input_block = Block::default()
+        .borders(Borders::ALL)
+        .border_style(Style::default().fg(if focused { MAGENTA } else { MUTED }))
+        .style(Style::default().bg(PANEL_ALT));
+
+    frame.render_widget(
+        Paragraph::new(input_line(app))
+            .block(input_block)
+            .wrap(Wrap { trim: false }),
+        chunks[0],
+    );
+
+    let side_rows = vec![
+        value_line(
+            "Mode",
+            app.session.send_mode.label(),
+            Some(HotAction::SendMode(match app.session.send_mode {
+                SendMode::Text => SendMode::Hex,
+                SendMode::Hex => SendMode::Text,
+            })),
+        ),
+        value_line(
+            "Ending",
+            app.session.line_ending.label(),
+            Some(HotAction::LineEnding(next_line_ending(
+                app.session.line_ending,
+            ))),
+        ),
+        button_line("[ Send ]", GREEN, Some(HotAction::Send)),
+        (
+            Line::from(vec![
+                Span::styled("Status ", Style::default().fg(MUTED)),
+                Span::styled(app.session.send_status.clone(), Style::default().fg(TEXT)),
+            ]),
+            None,
+        ),
+    ];
+
+    for (index, (_, action)) in side_rows.iter().enumerate() {
+        if let Some(action) = action {
+            app.add_hot_zone(
+                Rect {
+                    x: chunks[1].x,
+                    y: chunks[1].y.saturating_add(index as u16),
+                    width: chunks[1].width,
+                    height: 1,
+                },
+                *action,
+            );
+        }
+    }
+
+    frame.render_widget(
+        Paragraph::new(
+            side_rows
+                .into_iter()
+                .map(|(line, _)| line)
+                .collect::<Vec<_>>(),
+        )
+        .style(Style::default().bg(PANEL)),
+        chunks[1],
+    );
+}
+
+fn render_footer(frame: &mut Frame, app: &App, area: Rect) {
+    let search = if app.search.active && !app.search.query.is_empty() {
+        format!(
+            " search {}/{} '{}'",
+            app.search.display_index(),
+            app.search.count(),
+            app.search.query
+        )
+    } else {
+        String::new()
+    };
+    let shortcuts = "1/2/3 view  c connect  r reconnect  e config  / search  Ctrl-S send  q quit";
+    frame.render_widget(
+        Paragraph::new(Line::from(vec![
+            Span::styled(
+                format!(" {} ", app.notice),
+                Style::default().fg(TEXT).bg(PANEL_ALT),
+            ),
+            Span::styled(search, Style::default().fg(AMBER).bg(PANEL_ALT)),
+            Span::styled("  ", Style::default().bg(PANEL_ALT)),
+            Span::styled(shortcuts, Style::default().fg(MUTED).bg(PANEL_ALT)),
+        ])),
+        area,
+    );
+}
+
+fn render_search_modal(frame: &mut Frame, app: &mut App) {
+    let area = centered_rect(70, 7, frame.area());
+    app.add_hot_zone(area, HotAction::CloseModal);
+    frame.render_widget(Clear, area);
+    let block = panel_block("Search", true, CYAN);
+    let inner = block.inner(area);
+    frame.render_widget(block, area);
+
+    let body = vec![
+        Line::from(vec![
+            Span::styled("Query: ", Style::default().fg(MUTED)),
+            Span::styled(app.search.query.clone(), Style::default().fg(TEXT)),
+            Span::styled(
+                "_",
+                Style::default().fg(CYAN).add_modifier(Modifier::SLOW_BLINK),
+            ),
+        ]),
+        Line::from(vec![
+            Span::styled("Matches: ", Style::default().fg(MUTED)),
+            Span::styled(
+                format!("{}/{}", app.search.display_index(), app.search.count()),
+                Style::default().fg(AMBER),
+            ),
+            Span::raw("  "),
+            Span::styled(
+                if app.search.case_sensitive {
+                    "case sensitive"
+                } else {
+                    "case insensitive"
+                },
+                Style::default().fg(MAGENTA),
+            ),
+        ]),
+        Line::styled(
+            "Enter close  Up/Down navigate  Ctrl-C case",
+            Style::default().fg(MUTED),
+        ),
+    ];
+
+    frame.render_widget(
+        Paragraph::new(body)
+            .style(Style::default().bg(PANEL))
+            .wrap(Wrap { trim: false }),
+        inner,
+    );
+}
+
+fn render_config_modal(frame: &mut Frame, app: &mut App) {
+    let rows = app.config_form.rows();
+    let height = (rows.len() as u16 + 6).min(frame.area().height.saturating_sub(2));
+    let area = centered_rect(88, height, frame.area());
+    frame.render_widget(Clear, area);
+    let block = panel_block("Session Config", true, MAGENTA);
+    let inner = block.inner(area);
+    frame.render_widget(block, area);
+
+    let footer_height = 3;
+    let layout = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([Constraint::Min(3), Constraint::Length(footer_height)])
+        .split(inner);
+
+    let items = rows
+        .iter()
+        .enumerate()
+        .map(|(index, row)| {
+            let focused = index == app.config_form.focused;
+            let value_style = if row.editable {
+                Style::default().fg(CYAN)
+            } else {
+                Style::default().fg(AMBER)
+            };
+            ListItem::new(Line::from(vec![
+                Span::styled(
+                    format!("{:<18}", row.label),
+                    Style::default().fg(if focused { Color::Black } else { MUTED }),
+                ),
+                Span::styled(
+                    row.value.clone(),
+                    if focused {
+                        value_style.bg(MAGENTA).fg(Color::Black)
+                    } else {
+                        value_style
+                    },
+                ),
+            ]))
+            .style(if focused {
+                Style::default().bg(MAGENTA)
+            } else {
+                Style::default().bg(PANEL)
+            })
+        })
+        .collect::<Vec<_>>();
+
+    for (index, row) in rows.iter().enumerate() {
+        let y = layout[0].y.saturating_add(index as u16);
+        if y >= layout[0].y.saturating_add(layout[0].height) {
+            break;
+        }
+        app.add_hot_zone(
+            Rect {
+                x: layout[0].x,
+                y,
+                width: layout[0].width,
+                height: 1,
+            },
+            if row.field == ConfigField::Apply {
+                HotAction::ConfigSubmit
+            } else {
+                HotAction::ConfigFocus(row.field)
+            },
+        );
+    }
+
+    frame.render_widget(
+        List::new(items).style(Style::default().bg(PANEL)),
+        layout[0],
+    );
+    app.add_hot_zone(layout[1], HotAction::ConfigCancel);
+    frame.render_widget(
+        Paragraph::new(vec![
+            Line::styled(
+                "Tab move  Left/Right change options  Enter apply  Esc cancel",
+                Style::default().fg(MUTED),
+            ),
+            Line::styled(serial_ports_hint(app), Style::default().fg(BLUE)),
+        ])
+        .style(Style::default().bg(PANEL)),
+        layout[1],
+    );
+}
+
+fn render_help_modal(frame: &mut Frame, app: &mut App) {
+    let area = centered_rect(74, 12, frame.area());
+    app.add_hot_zone(area, HotAction::CloseModal);
+    frame.render_widget(Clear, area);
+    let block = panel_block("Help", true, BLUE);
+    let inner = block.inner(area);
+    frame.render_widget(block, area);
+    frame.render_widget(
+        Paragraph::new(vec![
+            Line::styled(
+                "Keyboard",
+                Style::default().fg(CYAN).add_modifier(Modifier::BOLD),
+            ),
+            Line::raw("1/2/3 switch views, Tab shift focus, q quit"),
+            Line::raw("c connect, r reconnect, e config, / search, x clear"),
+            Line::raw("Ctrl-S send, Enter edit/send composer, Esc close modal"),
+            Line::styled(
+                "Mouse",
+                Style::default().fg(AMBER).add_modifier(Modifier::BOLD),
+            ),
+            Line::raw("Click tabs, buttons, toggles, config rows, and composer."),
+            Line::raw("Wheel scrolls Text/Hex and zooms Plot."),
+        ])
+        .style(Style::default().fg(TEXT).bg(PANEL))
+        .wrap(Wrap { trim: false }),
+        inner,
+    );
+}
+
+fn format_console_line(
+    index: usize,
+    line: &ConsoleLine,
+    display: DisplayOptions,
+    app: &App,
+) -> Line<'static> {
+    let mut spans = prefix_spans(line.elapsed, line.direction, &line.pipeline, display);
+    let base_style = Style::default().fg(TEXT);
+    spans.extend(ansi_to_spans(&line.text, base_style));
+    apply_search_style(index, Line::from(spans), app)
+}
+
+fn format_hex_line(
+    index: usize,
+    line: &HexLine,
+    display: DisplayOptions,
+    app: &App,
+) -> Line<'static> {
+    let mut spans = prefix_spans(line.elapsed, line.direction, &line.pipeline, display);
+    spans.push(Span::styled(line.hex.clone(), Style::default().fg(AMBER)));
+    spans.push(Span::styled("  |", Style::default().fg(MUTED)));
+    spans.push(Span::styled(line.ascii.clone(), Style::default().fg(TEXT)));
+    spans.push(Span::styled("|", Style::default().fg(MUTED)));
+    apply_search_style(index, Line::from(spans), app)
+}
+
+fn prefix_spans(
+    elapsed: Duration,
+    direction: LineDirection,
+    pipeline: &str,
+    display: DisplayOptions,
+) -> Vec<Span<'static>> {
+    let mut spans = Vec::new();
+    if display.show_timestamp {
+        spans.push(Span::styled(
+            format!("[{}] ", format_elapsed(elapsed)),
+            Style::default().fg(MUTED),
+        ));
+    }
+    if display.show_direction {
+        let (label, color) = match direction {
+            LineDirection::In => ("IN", CYAN),
+            LineDirection::Out => ("OUT", AMBER),
+        };
+        spans.push(Span::styled(
+            format!("[{label}] "),
+            Style::default().fg(color).add_modifier(Modifier::BOLD),
+        ));
+    }
+    if display.show_pipeline {
+        spans.push(Span::styled(
+            format!("[{pipeline}] "),
+            Style::default().fg(MAGENTA),
+        ));
+    }
+    spans
+}
+
+fn apply_search_style(index: usize, line: Line<'static>, app: &App) -> Line<'static> {
+    if !app.search.active || app.search.query.is_empty() {
+        return line;
+    }
+
+    if app.search.current_line() == Some(index) {
+        line.style(Style::default().bg(AMBER))
+    } else if app.search.matches.contains(&index) {
+        line.style(Style::default().bg(Color::Rgb(47, 61, 91)))
+    } else {
+        line
+    }
+}
+
+fn input_line(app: &App) -> Line<'static> {
+    if app.session.send_input.is_empty() {
+        return Line::styled(
+            match app.session.send_mode {
+                SendMode::Text => "type text payload",
+                SendMode::Hex => "hex bytes, e.g. 48 65 6c 6c 6f",
+            },
+            Style::default().fg(MUTED),
+        );
+    }
+
+    if !matches!(app.mode, AppMode::EditingSend) {
+        return Line::styled(app.session.send_input.clone(), Style::default().fg(TEXT));
+    }
+
+    let mut spans = Vec::new();
+    let cursor = app.session.input_cursor;
+    for (index, ch) in app.session.send_input.chars().enumerate() {
+        if index == cursor {
+            spans.push(Span::styled(
+                ch.to_string(),
+                Style::default().fg(Color::Black).bg(MAGENTA),
+            ));
+        } else {
+            spans.push(Span::styled(ch.to_string(), Style::default().fg(TEXT)));
+        }
+    }
+    if cursor >= app.session.send_input.chars().count() {
+        spans.push(Span::styled(" ", Style::default().bg(MAGENTA)));
+    }
+    Line::from(spans)
+}
+
+fn section_line(label: &'static str) -> (Line<'static>, Option<HotAction>) {
+    (
+        Line::styled(
+            format!("-- {label} "),
+            Style::default().fg(MUTED).add_modifier(Modifier::BOLD),
+        ),
+        None,
+    )
+}
+
+fn spacer_line() -> (Line<'static>, Option<HotAction>) {
+    (Line::raw(""), None)
+}
+
+fn button_line(
+    label: &'static str,
+    color: Color,
+    action: Option<HotAction>,
+) -> (Line<'static>, Option<HotAction>) {
+    (
+        Line::from(vec![Span::styled(
+            label,
+            Style::default()
+                .fg(Color::Black)
+                .bg(color)
+                .add_modifier(Modifier::BOLD),
+        )]),
+        action,
+    )
+}
+
+fn toggle_line(
+    label: &'static str,
+    enabled: bool,
+    action: Option<HotAction>,
+) -> (Line<'static>, Option<HotAction>) {
+    (
+        Line::from(vec![
+            Span::styled(
+                if enabled { "[x] " } else { "[ ] " },
+                Style::default().fg(if enabled { GREEN } else { MUTED }),
+            ),
+            Span::styled(label, Style::default().fg(TEXT)),
+        ]),
+        action,
+    )
+}
+
+fn value_line(
+    label: &'static str,
+    value: &'static str,
+    action: Option<HotAction>,
+) -> (Line<'static>, Option<HotAction>) {
+    (
+        Line::from(vec![
+            Span::styled(format!("{label:<8}"), Style::default().fg(MUTED)),
+            Span::styled(value.to_string(), Style::default().fg(CYAN)),
+        ]),
+        action,
+    )
+}
+
+fn panel_block(title: &str, focused: bool, color: Color) -> Block<'_> {
+    Block::default()
+        .borders(Borders::ALL)
+        .title(Span::styled(
+            format!(" {title} "),
+            Style::default()
+                .fg(if focused { Color::Black } else { color })
+                .bg(if focused { color } else { PANEL })
+                .add_modifier(Modifier::BOLD),
+        ))
+        .border_style(Style::default().fg(if focused {
+            color
+        } else {
+            Color::Rgb(45, 58, 74)
+        }))
+        .style(Style::default().bg(PANEL))
+}
+
+fn axis(title: &'static str, min: f64, max: f64, color: Color) -> Axis<'static> {
+    Axis::default()
+        .title(title)
+        .style(Style::default().fg(color))
+        .bounds([min, max])
+        .labels(vec![
+            Span::styled(format!("{min:.2}"), Style::default().fg(MUTED)),
+            Span::styled(format!("{max:.2}"), Style::default().fg(MUTED)),
+        ])
+}
+
+fn centered_rect(width: u16, height: u16, area: Rect) -> Rect {
+    let vertical = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Fill(1),
+            Constraint::Length(height.min(area.height)),
+            Constraint::Fill(1),
+        ])
+        .split(area);
+
+    Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints([
+            Constraint::Fill(1),
+            Constraint::Length(width.min(area.width)),
+            Constraint::Fill(1),
+        ])
+        .split(vertical[1])[1]
+}
+
+fn status_color(status: &ConnectionStatus) -> Color {
+    match status {
+        ConnectionStatus::Connected => GREEN,
+        ConnectionStatus::Disconnected => MUTED,
+        ConnectionStatus::Connecting => AMBER,
+        ConnectionStatus::Error(_) => RED,
+    }
+}
+
+fn view_color(view: View) -> Color {
+    match view {
+        View::Text => CYAN,
+        View::Hex => AMBER,
+        View::Plot => GREEN,
+    }
+}
+
+fn format_elapsed(elapsed: Duration) -> String {
+    let secs = elapsed.as_secs_f64();
+    if secs < 60.0 {
+        format!("{secs:05.2}")
+    } else {
+        format!("{:02}:{:02}", (secs / 60.0) as u64, (secs % 60.0) as u64)
+    }
+}
+
+fn next_line_ending(current: LineEnding) -> LineEnding {
+    let endings = LineEnding::ALL;
+    let index = endings
+        .iter()
+        .position(|ending| *ending == current)
+        .unwrap_or(0);
+    endings[(index + 1) % endings.len()]
+}
+
+fn serial_ports_hint(app: &App) -> String {
+    if app.config_form.available_serial_ports.is_empty() {
+        String::from("Serial ports: none detected")
+    } else {
+        format!(
+            "Serial ports: {}",
+            app.config_form.available_serial_ports.join(", ")
+        )
+    }
+}

crates/xserial-gui/src/main.rs

@@ -1,25 +0,0 @@
-mod app;
-mod app_state;
-mod buffers;
-mod panels;
-mod ui_fonts;
-
-use xserial_client::SessionManager;
-
-fn main() {
-    tracing_subscriber::fmt()
-        .with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
-        .init();
-
-    let rt = tokio::runtime::Runtime::new().expect("tokio runtime");
-    let _guard = rt.enter();
-
-    let mgr = SessionManager::new();
-    let rx = mgr.subscribe();
-
-    let _ = eframe::run_native(
-        "xserial",
-        eframe::NativeOptions::default(),
-        Box::new(|cc| Ok(Box::new(app::XserialApp::new(mgr, rx, cc.egui_ctx.clone())))),
-    );
-}

crates/xserial-gui/src/panels/console.rs

@@ -1,36 +0,0 @@
-use crate::app::DisplayOptions;
-use crate::buffers::{LineDirection, TextBuffer};
-use egui::{ScrollArea, Ui};
-
-pub fn render(ui: &mut Ui, buf: &TextBuffer, display: DisplayOptions) {
-    ScrollArea::vertical().stick_to_bottom(true).show(ui, |ui| {
-        for line in buf.iter() {
-            let mut prefix = Vec::new();
-            if display.show_timestamp {
-                let ts = line.elapsed.as_secs_f64();
-                let time = if ts < 60.0 {
-                    format!("{:05.2}", ts)
-                } else {
-                    format!("{:02}:{:02}", (ts / 60.0) as u64, (ts % 60.0) as u64)
-                };
-                prefix.push(format!("[{time}]"));
-            }
-            if display.show_direction {
-                let dir = match line.direction {
-                    LineDirection::In => "IN",
-                    LineDirection::Out => "OUT",
-                };
-                prefix.push(format!("[{dir}]"));
-            }
-            if display.show_pipeline {
-                prefix.push(format!("[{}]", line.pipeline));
-            }
-            let prefix = if prefix.is_empty() {
-                String::new()
-            } else {
-                format!("{} ", prefix.join(" "))
-            };
-            ui.monospace(format!("{prefix}{}", line.text));
-        }
-    });
-}

crates/xserial-gui/src/panels/hex_view.rs

@@ -1,41 +0,0 @@
-use crate::app::DisplayOptions;
-use crate::buffers::{HexBuffer, LineDirection};
-use egui::{ScrollArea, Ui};
-
-pub fn render(ui: &mut Ui, buf: &HexBuffer, display: DisplayOptions) {
-    let mut lines = buf.iter().peekable();
-    if lines.peek().is_none() {
-        ui.label("no hex data");
-        return;
-    }
-    ScrollArea::vertical().stick_to_bottom(true).show(ui, |ui| {
-        for line in lines {
-            let mut prefix = Vec::new();
-            if display.show_timestamp {
-                let ts = line.elapsed.as_secs_f64();
-                let time = if ts < 60.0 {
-                    format!("{:05.2}", ts)
-                } else {
-                    format!("{:02}:{:02}", (ts / 60.0) as u64, (ts % 60.0) as u64)
-                };
-                prefix.push(format!("[{time}]"));
-            }
-            if display.show_direction {
-                let dir = match line.direction {
-                    LineDirection::In => "IN",
-                    LineDirection::Out => "OUT",
-                };
-                prefix.push(format!("[{dir}]"));
-            }
-            if display.show_pipeline {
-                prefix.push(format!("[{}]", line.pipeline));
-            }
-            let prefix = if prefix.is_empty() {
-                String::new()
-            } else {
-                format!("{} ", prefix.join(" "))
-            };
-            ui.monospace(format!("{prefix}{}  |{}|", line.hex, line.ascii));
-        }
-    });
-}

crates/xserial-tui/src/main.rs

@@ -1 +0,0 @@
-fn main() {}

examples/drone_plot.lua

@@ -0,0 +1,16 @@
+return {
+    decode = function(frame)
+        if #frame == 0 then return nil end
+
+        local gyro_str = frame:match("Gyro:([%d%.%-]+),([%d%.%-]+),([%d%.%-]+)")
+        if not gyro_str then return nil end
+
+        local gz, gy, gx = frame:match("Gyro:([%d%.%-]+),([%d%.%-]+),([%d%.%-]+)")
+        return {
+            kind = "plot",
+            channels = { { tonumber(gz) }, { tonumber(gy) }, { tonumber(gx) } },
+            sample_type = "F64",
+            format = "Block",
+        }
+    end,
+}

examples/drone_text.lua

@@ -0,0 +1,33 @@
+local LABELS = {
+    AHRS = "Quaternion",
+    YPR  = "Yaw/Pitch/Roll",
+    Gyro = "Gyro (deg/s)",
+    RC   = "RC Channels",
+    M    = "Motors",
+    L    = "L",
+    F    = "F",
+    C    = "C",
+}
+
+return {
+    decode = function(frame)
+        if #frame == 0 then return nil end
+
+        local lines = {}
+        for segment in frame:gmatch("[^|]+") do
+            local colon = segment:find(":")
+            if colon then
+                local key = segment:sub(1, colon - 1)
+                local val = segment:sub(colon + 1)
+                local label = LABELS[key] or key
+                lines[#lines + 1] = string.format("%-18s %s", label .. ":", val)
+            end
+        end
+        lines[#lines + 1] = string.rep("-", 40)
+
+        return {
+            kind = "text",
+            data = table.concat(lines, "\n"),
+        }
+    end,
+}

tests/lua_line_framer.lua

@@ -0,0 +1,43 @@
+local buffer = ""
+
+return {
+    feed = function(bytes)
+        buffer = buffer .. bytes
+        local frames = {}
+
+        while true do
+            local i = buffer:find("\n", 1, true)
+            if not i then
+                break
+            end
+
+            local frame = buffer:sub(1, i - 1)
+            if frame:sub(-1) == "\r" then
+                frame = frame:sub(1, -2)
+            end
+
+            frames[#frames + 1] = frame
+            buffer = buffer:sub(i + 1)
+        end
+
+        return frames
+    end,
+
+    flush = function()
+        if #buffer == 0 then
+            return nil
+        end
+
+        local frame = buffer
+        buffer = ""
+        return frame
+    end,
+
+    reset = function()
+        buffer = ""
+    end,
+
+    pending_len = function()
+        return #buffer
+    end,
+}

tests/lua_text_decoder.lua

@@ -0,0 +1,12 @@
+return {
+    decode = function(frame)
+        if #frame == 0 then
+            return nil
+        end
+
+        return {
+            kind = "text",
+            data = frame,
+        }
+    end,
+}

tools/test_ansi.py

@@ -0,0 +1,317 @@
+#!/usr/bin/env python3
+"""Generate ANSI-colored terminal output for testing pipeview ANSI rendering."""
+
+import argparse
+import math
+import random
+import socket
+import sys
+import time
+import itertools
+
+# ── helpers ──────────────────────────────────────────────────────────────────
+
+RESET = "\x1b[0m"
+
+# Standard 3/4-bit foreground
+FG = {
+    "black":   "\x1b[30m",  "red":     "\x1b[31m",  "green":  "\x1b[32m",
+    "yellow":  "\x1b[33m",  "blue":    "\x1b[34m",  "magenta":"\x1b[35m",
+    "cyan":    "\x1b[36m",  "white":   "\x1b[37m",
+}
+FG_BRIGHT = {
+    "black":   "\x1b[90m",  "red":     "\x1b[91m",  "green":  "\x1b[92m",
+    "yellow":  "\x1b[93m",  "blue":    "\x1b[94m",  "magenta":"\x1b[95m",
+    "cyan":    "\x1b[96m",  "white":   "\x1b[97m",
+}
+
+# Standard 3/4-bit background
+BG = {
+    "black":   "\x1b[40m",  "red":     "\x1b[41m",  "green":  "\x1b[42m",
+    "yellow":  "\x1b[43m",  "blue":    "\x1b[44m",  "magenta":"\x1b[45m",
+    "cyan":    "\x1b[46m",  "white":   "\x1b[47m",
+}
+BG_BRIGHT = {
+    "black":   "\x1b[100m", "red":     "\x1b[101m", "green":  "\x1b[102m",
+    "yellow":  "\x1b[103m", "blue":    "\x1b[104m", "magenta":"\x1b[105m",
+    "cyan":    "\x1b[106m", "white":   "\x1b[107m",
+}
+
+BOLD      = "\x1b[1m"
+FAINT     = "\x1b[2m"
+ITALIC    = "\x1b[3m"
+UNDERLINE = "\x1b[4m"
+STRIKE    = "\x1b[9m"
+
+
+def fg256(n: int) -> str:
+    return f"\x1b[38;5;{n}m"
+
+def bg256(n: int) -> str:
+    return f"\x1b[48;5;{n}m"
+
+def fg_rgb(r: int, g: int, b: int) -> str:
+    return f"\x1b[38;2;{r};{g};{b}m"
+
+def bg_rgb(r: int, g: int, b: int) -> str:
+    return f"\x1b[48;2;{r};{g};{b}m"
+
+
+# ── test scenes ──────────────────────────────────────────────────────────────
+
+def scene_16color(delay: float):
+    """Show all 8 standard + 8 bright foreground colors."""
+    lines = []
+    lines.append(f"{BOLD}─── Standard 16 Foreground Colors ───{RESET}")
+    for name in FG:
+        lines.append(f"  {FG[name]}■ {name:>8}{RESET}  "
+                     f"{FG_BRIGHT[name]}■ bright {name}{RESET}")
+    for line in lines:
+        yield line, delay
+
+
+def scene_bg_colors(delay: float):
+    """Show foreground colors on colored backgrounds."""
+    lines = []
+    lines.append(f"{BOLD}─── Background Colors ───{RESET}")
+    for bg_name in BG:
+        line = ""
+        for fg_name in ["white", "black"]:
+            line += f"{BG[bg_name]}{FG[fg_name]} {fg_name} on {bg_name} {RESET} "
+        lines.append(line)
+    for line in lines:
+        yield line, delay
+
+
+def scene_styles(delay: float):
+    """Show bold, italic, underline, strikethrough."""
+    lines = []
+    lines.append(f"{BOLD}─── Text Styles ───{RESET}")
+    lines.append(f"  {BOLD}Bold text{RESET}")
+    lines.append(f"  {ITALIC}Italic text{RESET}")
+    lines.append(f"  {UNDERLINE}Underlined text{RESET}")
+    lines.append(f"  {STRIKE}Strikethrough text{RESET}")
+    lines.append(f"  {BOLD}{ITALIC}Bold + Italic{RESET}")
+    lines.append(f"  {BOLD}{FG['red']}Bold Red{RESET}  vs  {FG['red']}Normal Red{RESET}")
+    for line in lines:
+        yield line, delay
+
+
+def scene_256_ramp(delay: float):
+    """Show a 256-color ramp."""
+    lines = []
+    lines.append(f"{BOLD}─── 256-Color Ramp ───{RESET}")
+    # 16 basic colors
+    line = "Basic: "
+    for n in range(16):
+        line += f"{fg256(n)}██{RESET}"
+    lines.append(line)
+    for row in range(3):
+        line = f"Cube {row+1}: "
+        for col in range(6):
+            n = 16 + row * 36 + col * 6
+            line += f"{fg256(n)}██{RESET}"
+        lines.append(line)
+    line = "Gray:  "
+    for n in range(232, 256):
+        line += f"{fg256(n)}█{RESET}"
+    lines.append(line)
+    for line in lines:
+        yield line, delay
+
+
+def scene_truecolor(delay: float):
+    """Show 24-bit truecolor gradient."""
+    lines = []
+    lines.append(f"{BOLD}─── Truecolor (24-bit) ───{RESET}")
+    line = "R→G:  "
+    for i in range(32):
+        r = 255 - i * 8
+        g = i * 8
+        line += f"{fg_rgb(r, g, 0)}█{RESET}"
+    lines.append(line)
+    line = "B→Y:  "
+    for i in range(32):
+        b = 255 - i * 8
+        r = g = i * 8
+        line += f"{fg_rgb(r, g, b)}█{RESET}"
+    lines.append(line)
+    line = "Rainbow: "
+    for i in range(48):
+        hue = i / 48.0 * 6.0
+        r, g, b = _hsv_to_rgb(hue, 1.0, 1.0)
+        line += f"{fg_rgb(r, g, b)}━{RESET}"
+    lines.append(line)
+    for line in lines:
+        yield line, delay
+
+
+def scene_status_log(delay: float):
+    """Simulate systemd-style status output."""
+    lines = [
+        f"{FG_BRIGHT['green']}[  OK  ]{RESET} Started {BOLD}System Logging Service{RESET}.",
+        f"{FG_BRIGHT['green']}[  OK  ]{RESET} Started {BOLD}Network Manager{RESET}.",
+        f"{FG_BRIGHT['green']}[  OK  ]{RESET} Reached target {ITALIC}multi-user.target{RESET}.",
+        f"{FG_BRIGHT['yellow']}[ WARN ]{RESET} Failed to load kernel module {UNDERLINE}nvidia{RESET}.",
+        f"{FG_BRIGHT['red']}[ FAIL ]{RESET} {FG['red']}{BOLD}ssh.service{RESET}{FG['red']} failed to start.{RESET}",
+        f"{FG_BRIGHT['cyan']}[ INFO ]{RESET} Listening on {fg256(33)}0.0.0.0:8080{RESET}.",
+        f"         {ITALIC}─ subject=CN=example.com{RESET}",
+        f"         {ITALIC}─ fingerprint={FG['yellow']}SHA256:abcd1234{RESET}",
+        f"{FG_BRIGHT['green']}[  OK  ]{RESET} Mounted {BG['blue']}{FG['white']} /var {RESET} filesystem.",
+        f"{FG_BRIGHT['magenta']}[STATUS]{RESET} CPU: {fg256(46)}32%{RESET}  "
+        f"Mem: {fg256(220)}1.2G{RESET}/{fg256(33)}4.0G{RESET}  "
+        f"Temp: {_temp_color(58)}58°C{RESET}",
+    ]
+    for line in lines:
+        yield line, delay
+
+
+def scene_colored_log_stream(delay: float):
+    """Continuously generate log lines cycling through themes."""
+    themes = [
+        ('green',  'INFO ', "Connection accepted from 192.168.1.100"),
+        ('cyan',   'DEBUG', "Processing frame #{}"),
+        ('yellow', 'WARN ', "Buffer usage at {:.0f}%"),
+        ('red',    'ERROR', "CRC mismatch on packet {}"),
+        ('white',  'TRACE', "Entering function handle_request()"),
+        ('magenta','AUDIT', "User admin performed action {}"),
+    ]
+    counter = itertools.count(1)
+    while True:
+        color_name, level, template = random.choice(themes)
+        n = next(counter)
+        msg = template.format(n, random.uniform(60, 95), n)
+        ts = time.strftime("%H:%M:%S")
+        line = (f"{ITALIC}{ts}{RESET} "
+                f"{FG_BRIGHT[color_name]}{BOLD}[{level}]{RESET} "
+                f"{msg}")
+        yield line, delay
+
+
+def scene_rainbow_wave(delay: float):
+    """Animated rainbow wave (for live testing)."""
+    t0 = time.time()
+    while True:
+        t = time.time() - t0
+        line = ""
+        for x in range(60):
+            hue = (x / 60.0 + t * 0.3) % 1.0
+            r, g, b = _hsv_to_rgb(hue * 6.0, 1.0, 0.8 + 0.2 * math.sin(t * 2 + x * 0.3))
+            line += f"{fg_rgb(r, g, b)}━{RESET}"
+        yield line, delay
+
+
+def scene_system_boot(delay: float):
+    """Simulate a system boot sequence with progress."""
+    services = [
+        ("udev",            "Kernel Device Manager",       0.6),
+        ("systemd-journald","Journal Service",             0.8),
+        ("NetworkManager",  "Network Manager",             0.7),
+        ("sshd",            "OpenSSH Daemon",              0.5),
+        ("nginx",           "HTTP Server",                 0.9),
+        ("postgresql",      "PostgreSQL 16",               1.2),
+        ("docker",          "Docker Engine",               1.5),
+        ("pipeview",        "Pipe Data Monitor",           0.3),
+    ]
+    t0 = time.time()
+    for name, desc, startup_time in services:
+        yield (f"{FG_BRIGHT['cyan']}[ .... ]{RESET} Starting {BOLD}{name}{RESET} - {desc}...",
+               startup_time * 0.3)
+        yield (f"{FG_BRIGHT['green']}[  OK  ]{RESET} Started {BOLD}{name}{RESET} - {desc}.",
+               delay)
+    yield (f"\n{FG_BRIGHT['green']}{BOLD}Boot complete.{RESET} "
+           f"({time.time() - t0:.1f}s)", delay)
+
+
+# ── helpers ──────────────────────────────────────────────────────────────────
+
+def _hsv_to_rgb(h: float, s: float, v: float) -> tuple[int, int, int]:
+    """HSV → RGB, h in [0, 6), s,v in [0, 1]."""
+    c = v * s
+    x = c * (1 - abs((h % 2) - 1))
+    m = v - c
+    r, g, b = {
+        0: (c, x, 0), 1: (x, c, 0), 2: (0, c, x),
+        3: (0, x, c), 4: (x, 0, c), 5: (c, 0, x),
+    }[int(h) % 6]
+    return int((r + m) * 255), int((g + m) * 255), int((b + m) * 255)
+
+
+def _temp_color(temp: float) -> str:
+    if temp < 50:  return fg256(46)
+    elif temp < 70: return fg256(220)
+    else:           return fg256(196)
+
+
+# ── scenes registry ──────────────────────────────────────────────────────────
+
+STATIC_SCENES = [
+    ("16color",       scene_16color,       "Standard 16 foreground colors"),
+    ("bg",            scene_bg_colors,     "Background colors"),
+    ("styles",        scene_styles,        "Bold, italic, underline, strikethrough"),
+    ("256ramp",       scene_256_ramp,      "256-color ramp"),
+    ("truecolor",     scene_truecolor,     "24-bit truecolor gradients"),
+    ("status",        scene_status_log,    "systemd-style status log"),
+    ("boot",          scene_system_boot,   "System boot sequence"),
+]
+
+LIVE_SCENES = [
+    ("logstream",     scene_colored_log_stream, "Continuous colored log stream"),
+    ("rainbow",       scene_rainbow_wave,       "Animated rainbow wave"),
+]
+
+
+# ── main ─────────────────────────────────────────────────────────────────────
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="ANSI color test data generator for pipeview",
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+        epilog="Scenes:\n" + "\n".join(
+            f"  {n:<14} {d}" for n, _, d in STATIC_SCENES + LIVE_SCENES
+        ),
+    )
+    parser.add_argument("--host", default="127.0.0.1", help="TCP bind host")
+    parser.add_argument("--port", type=int, default=8099, help="TCP port")
+    parser.add_argument("--scene", choices=[n for n, _, _ in STATIC_SCENES + LIVE_SCENES] + ["all"],
+                        default="all", help="Scene to play")
+    parser.add_argument("--delay", type=float, default=0.15, help="Inter-line delay (seconds)")
+    parser.add_argument("--loop", action="store_true", help="Repeat the scene forever")
+    args = parser.parse_args()
+
+    scenes = STATIC_SCENES + LIVE_SCENES
+    if args.scene != "all":
+        scenes = [(n, f, d) for n, f, d in scenes if n == args.scene]
+
+    print(f"ANSI color test → {args.host}:{args.port}")
+    print(f"Scene: {args.scene}, delay: {args.delay}s, loop: {args.loop}")
+
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as server:
+        server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        server.bind((args.host, args.port))
+        server.listen(1)
+        print(f"Listening on {args.host}:{args.port}, waiting for connections...")
+
+        while True:
+            sock, addr = server.accept()
+            print(f"Client connected from {addr}")
+            try:
+                _play_scenes(sock, scenes, args.delay, args.loop)
+            except (BrokenPipeError, ConnectionResetError):
+                pass
+            print("Client disconnected. Waiting for new connection...")
+
+
+def _play_scenes(sock: socket.socket, scenes, delay: float, loop_scenes: bool):
+    first = True
+    while first or loop_scenes:
+        first = False
+        for name, scene_fn, _desc in scenes:
+            print(f"  [{name}]")
+            for line, line_delay in scene_fn(delay):
+                sock.sendall((line + "\n").encode())
+                time.sleep(line_delay)
+
+
+if __name__ == "__main__":
+    main()

tools/test_drone.py

@@ -0,0 +1,102 @@
+#!/usr/bin/env python3
+"""Generate fake drone telemetry data for testing pipeview Lua decoder."""
+
+import argparse
+import math
+import random
+import socket
+import time
+
+
+def generate_line(t: float) -> str:
+    """Generate one telemetry line with simulated sensor values."""
+    # Quaternion (w, x, y, z) — gently rotating
+    angle = t * 0.5
+    qw = math.cos(angle)
+    qx = math.sin(angle) * 0.1
+    qy = math.sin(angle) * 0.05
+    qz = math.sin(angle) * 0.02
+
+    # Yaw/Pitch/Roll — sine wave simulation
+    yaw = math.degrees(math.sin(t * 0.3)) * 30
+    pitch = math.degrees(math.sin(t * 0.5)) * 15
+    roll = math.degrees(math.sin(t * 0.7)) * 10
+
+    # Gyro (deg/s)
+    gz = math.sin(t * 0.3) * 50 + random.uniform(-2, 2)
+    gy = math.sin(t * 0.5) * 30 + random.uniform(-2, 2)
+    gx = math.sin(t * 0.7) * 20 + random.uniform(-2, 2)
+
+    # RC channels (1000-2000 us)
+    rc_r = int(1500 + math.sin(t * 0.3) * 200)
+    rc_p = int(1500 + math.sin(t * 0.5) * 150)
+    rc_t = int(1000 + (math.sin(t * 0.1) + 1) * 500)  # throttle 1000-2000
+    rc_y = int(1500 + math.sin(t * 0.3) * 100)
+
+    # Motors (1000-2000)
+    base = 1200 + int((math.sin(t * 0.1) + 1) * 400)
+    m1 = base + random.randint(-20, 20)
+    m2 = base + random.randint(-20, 20)
+    m3 = base + random.randint(-20, 20)
+    m4 = base + random.randint(-20, 20)
+
+    return (
+        f"AHRS q:{qw:.4f},{qx:.4f},{qy:.4f},{qz:.4f}|"
+        f"YPR:{yaw:.2f},{pitch:.2f},{roll:.2f}|"
+        f"Gyro:{gz:.2f},{gy:.2f},{gx:.2f}|"
+        f"RC:{rc_r},{rc_p},{rc_t},{rc_y}|"
+        f"M:{m1},{m2},{m3},{m4}|"
+        f"L:0 F:1 C:0\n"
+    )
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Drone telemetry test data generator")
+    parser.add_argument("--host", default="127.0.0.1", help="TCP host")
+    parser.add_argument("--port", type=int, default=8092, help="TCP port")
+    parser.add_argument("--rate", type=float, default=10, help="Lines per second")
+    parser.add_argument("--duration", type=float, default=0, help="Seconds to run (0 = forever)")
+    args = parser.parse_args()
+
+    interval = 1.0 / args.rate
+    print(f"Sending drone telemetry to {args.host}:{args.port} at {args.rate} Hz")
+
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as server:
+        server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        server.bind((args.host, args.port))
+        server.listen(1)
+        print(f"Listening on {args.host}:{args.port}, waiting for connections...")
+
+        while True:
+            sock, addr = server.accept()
+            print(f"Client connected from {addr}")
+
+            t0 = time.time()
+            seq = 0
+
+            try:
+                while True:
+                    t = time.time() - t0
+                    line = generate_line(t)
+                    try:
+                        sock.sendall(line.encode())
+                    except (BrokenPipeError, ConnectionResetError):
+                        break
+                    seq += 1
+
+                    if args.duration > 0 and t >= args.duration:
+                        break
+
+                    elapsed = time.time() - t0
+                    target = (seq + 1) * interval
+                    sleep_time = target - elapsed
+                    if sleep_time > 0:
+                        time.sleep(sleep_time)
+            except (BrokenPipeError, ConnectionResetError):
+                pass
+
+            print(f"Client disconnected. Sent {seq} lines. Waiting for new connection...")
+
+
+if __name__ == "__main__":
+    main()

tools/test_plot.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""TCP server that sends plot waveform frames for the current xserial GUI."""
+"""TCP server that sends plot waveform frames or text lines for pipeview GUI."""
 
 import argparse
 import math
@@ -116,9 +116,9 @@ def is_disconnect_error(err: OSError) -> bool:
 
 
 def main() -> None:
-    parser = argparse.ArgumentParser(description="xserial plot test server")
+    parser = argparse.ArgumentParser(description="pipeview plot test server")
     parser.add_argument("--host", default="127.0.0.1")
-    parser.add_argument("--port", type=int, default=8091)
+    parser.add_argument("--port", type=int, default=8080)
     parser.add_argument("--channels", type=int, default=1)
     parser.add_argument(
         "--format",
@@ -148,9 +148,9 @@ def main() -> None:
     )
     parser.add_argument(
         "--wire-format",
-        choices=("mixed", "raw"),
+        choices=("mixed", "raw", "text"),
         default="mixed",
-        help="mixed sends text+plot on one connection; raw sends plot only",
+        help="mixed sends text+plot; raw sends plot only; text sends text only",
     )
     args = parser.parse_args()
 
@@ -193,17 +193,36 @@ def main() -> None:
             values.append(args.amp * math.sin(2 * math.pi * args.freq * t + phase))
         return values
 
+    def build_text_line(started_at: float, now: float, sample_index: int) -> str:
+        values = sample_values(sample_index)
+        joined = ", ".join(
+            f"ch{index + 1}={value:8.3f}" for index, value in enumerate(values)
+        )
+        return (
+            f"测试 time={now - started_at:7.3f}s "
+            f"sample={sample_index:7d} {joined}\n"
+        )
+
     print(f"Listening {args.host}:{args.port} - Ctrl+C to stop")
     print("GUI:")
     print(f"  transport = TCP {args.host}:{args.port}")
     if args.wire_format == "mixed":
         print("  framer    = MixedTextPlot")
         print("  decoder   = MixedTextPlot\n")
-    else:
+    elif args.wire_format == "raw":
         print(f"  framer    = Fixed({frame_bytes})")
         print(
             f"  decoder   = Plot(f32, little-endian, {args.channels} channel, {args.format})\n"
         )
+    else:
+        print("  framer    = Line")
+        print("  decoder   = Text")
+        print("  lua test  = Lua framer tests/lua_line_framer.lua")
+        print("              Lua decoder tests/lua_text_decoder.lua\n")
+    if args.wire_format == "text":
+        print(f"sending text only at {args.text_interval:.3f}s intervals")
+        print(f"sample clock: {args.rate:.1f} samples/sec\n")
+    else:
         print(f"sending {samples_per_channel} samples/frame at {args.rate:.1f} samples/sec")
         print(f"effective frame rate: {frame_rate:.2f} fps\n")
 
@@ -230,6 +249,25 @@ def main() -> None:
                 next_text_at = started_at
                 try:
                     while not stop_event.is_set():
+                        if args.wire_format == "text":
+                            now = time.perf_counter()
+                            wait = next_text_at - now
+                            if wait > 0:
+                                time.sleep(min(wait, 0.1))
+                                continue
+
+                            sample_index = int((now - started_at) * args.rate)
+                            conn.sendall(
+                                build_text_line(
+                                    started_at,
+                                    now,
+                                    sample_index,
+                                ).encode("utf-8")
+                            )
+                            text_count += 1
+                            next_text_at += args.text_interval
+                            continue
+
                         plot_payload = build_frame(
                             sample_index=sample_index,
                             channels=args.channels,
@@ -252,16 +290,13 @@ def main() -> None:
 
                         now = time.perf_counter()
                         if args.wire_format == "mixed" and now >= next_text_at:
-                            values = sample_values(sample_index)
+                            conn.sendall(
-                            joined = ", ".join(
+                                build_text_line(
-                                f"ch{index + 1}={value:8.3f}"
+                                    started_at,
-                                for index, value in enumerate(values)
+                                    now,
+                                    sample_index,
+                                ).encode("utf-8")
                             )
-                            line = (
-                                f"time={now - started_at:7.3f}s "
-                                f"sample={sample_index:7d} {joined}\n"
-                            )
-                            conn.sendall(line.encode("utf-8"))
                             text_count += 1
                             next_text_at += args.text_interval
 
@@ -275,6 +310,9 @@ def main() -> None:
                 except OSError as err:
                     if not is_disconnect_error(err):
                         raise
+                    if args.wire_format == "text":
+                        print(f"[conn -] {addr} ({text_count} text lines)")
+                    else:
                         print(
                             f"[conn -] {addr} "
                             f"({frame_count} plot frames, {text_count} text lines)"

tools/test_plot_serial.c

@@ -0,0 +1,540 @@
+/*
+ * test_plot_serial.c — 持续向串口发送 MixedTextPlot 正弦波 + 文本流
+ *
+ * 编译 (Linux):
+ *   gcc -std=c11 -Wall -Wextra -O2 -o test_plot_serial tools/test_plot_serial.c -lm
+ *
+ * 用法:
+ *   ./test_plot_serial /dev/ttyUSB0
+ *   ./test_plot_serial /dev/ttyUSB0 --baud 115200 --channels 2 --format xy --rate 1024 --freq 2.0 --amp 150
+ *   ./test_plot_serial --help
+ *
+ * 依赖: tools/xs_mixed_plot.h (同目录, 定义 COBS 和 MixedTextPlot 帧格式)
+ *
+ * 协议说明:
+ *   Plot 帧:  0x1E 'P' + COBS(packet) + 0x00
+ *   文本帧:   UTF-8 文本行 + '\n' (直接写入, 由 MixedTextPlot framer 按行分割)
+ *
+ * 串口参数: 8N1, 无流控, 默认 115200 baud
+ */
+
+#define _POSIX_C_SOURCE 200809L
+#include "xs_mixed_plot.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <math.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <time.h>
+#include <unistd.h>
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+/* ── 配置默认值 ───────────────────────────────────────────────────── */
+
+#define DEFAULT_BAUDRATE    115200
+#define DEFAULT_RATE        1024.0     /* samples/sec per channel */
+#define DEFAULT_FREQ        1.0        /* sine Hz */
+#define DEFAULT_AMP         100.0
+#define DEFAULT_TEXT_INTERVAL 1.0     /* seconds between text lines */
+
+/* ── 全局状态 (用于信号处理) ──────────────────────────────────────── */
+
+static volatile sig_atomic_t g_running = 1;
+
+static void sigint_handler(int sig) {
+    (void)sig;
+    g_running = 0;
+}
+
+/* ── 缓冲大小 ─────────────────────────────────────────────────────── */
+
+#define MAX_CHANNELS         8
+#define MAX_SPC              4096       /* samples_per_channel */
+#define MAX_VALUES           (MAX_CHANNELS * MAX_SPC)  /* float values per frame */
+#define MAX_PAYLOAD          (MAX_VALUES * 4)
+#define MAX_PACKET           (13 + MAX_PAYLOAD)
+#define MAX_FRAME            (2 + (MAX_PACKET + MAX_PACKET / 254 + 1) + 1)
+#define TEXT_BUF_SIZE        512
+
+/* ── 运行时参数 ───────────────────────────────────────────────────── */
+
+typedef struct {
+    const char *port;
+    int         baudrate;
+    uint8_t     channels;
+    uint16_t    samples_per_channel;
+    uint8_t     plot_format;    /* XS_PLOT_FORMAT_INTERLEAVED / XY */
+    double      rate;           /* samples/sec */
+    double      freq;           /* sine Hz */
+    double      amp;
+    double      text_interval;  /* seconds */
+} args_t;
+
+/* ── 串口操作 ─────────────────────────────────────────────────────── */
+
+static int serial_open(const char *path, int baudrate) {
+    int fd = open(path, O_RDWR | O_NOCTTY | O_NONBLOCK);
+    if (fd < 0) {
+        perror("open");
+        return -1;
+    }
+
+    /* 恢复阻塞模式, 但配合超时使用 select */
+    int flags = fcntl(fd, F_GETFL, 0);
+    if (flags < 0) { perror("fcntl"); close(fd); return -1; }
+    flags &= ~O_NONBLOCK;
+    if (fcntl(fd, F_SETFL, flags) < 0) { perror("fcntl"); close(fd); return -1; }
+
+    struct termios tty;
+    memset(&tty, 0, sizeof(tty));
+    if (tcgetattr(fd, &tty) < 0) { perror("tcgetattr"); close(fd); return -1; }
+
+    /* 输入: 忽略 BREAK, CR→NL 不转换, 奇偶校验不检查 */
+    tty.c_iflag = IGNBRK;
+
+    /* 输出: 原始模式, 不做任何转换 */
+    tty.c_oflag = 0;
+
+    /* 控制: 8 位, 无奇偶校验, 启用接收器 */
+    tty.c_cflag = CS8 | CREAD | CLOCAL;
+
+    /* 本地: 关闭标准行处理/回显/信号字符 */
+    tty.c_lflag = 0;
+
+    /* 特殊字符: 无超时 (VMIN=1, VTIME=0 → 阻塞读直到至少1字节) */
+    tty.c_cc[VMIN]  = 1;
+    tty.c_cc[VTIME] = 0;
+
+    /* 设置波特率 */
+    speed_t speed = B115200;
+    switch (baudrate) {
+        case 9600:    speed = B9600;    break;
+        case 19200:   speed = B19200;   break;
+        case 38400:   speed = B38400;   break;
+        case 57600:   speed = B57600;   break;
+        case 115200:  speed = B115200;  break;
+        case 230400:  speed = B230400;  break;
+        case 460800:  speed = B460800;  break;
+        case 921600:  speed = B921600;  break;
+        default:
+            fprintf(stderr, "不支持的波特率: %d (支持: 9600-921600)\n", baudrate);
+            close(fd);
+            return -1;
+    }
+    cfsetispeed(&tty, speed);
+    cfsetospeed(&tty, speed);
+
+#ifdef CRTSCTS
+    tty.c_cflag &= ~CRTSCTS;
+#endif
+    /* 关闭软件流控 */
+    tty.c_iflag &= ~(IXON | IXOFF | IXANY);
+
+    if (tcsetattr(fd, TCSANOW, &tty) < 0) {
+        perror("tcsetattr");
+        close(fd);
+        return -1;
+    }
+
+    /* 排空缓冲区 */
+    tcflush(fd, TCIOFLUSH);
+
+    return fd;
+}
+
+/* ── 时间工具 ─────────────────────────────────────────────────────── */
+
+static double now_sec(void) {
+    struct timespec ts;
+    clock_gettime(CLOCK_MONOTONIC, &ts);
+    return (double)ts.tv_sec + (double)ts.tv_nsec * 1e-9;
+}
+
+static void sleep_sec(double seconds) {
+    if (seconds <= 0.0) return;
+    struct timespec ts;
+    ts.tv_sec  = (time_t)seconds;
+    ts.tv_nsec = (long)((seconds - (time_t)seconds) * 1e9);
+    clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL);
+}
+
+/* ── 信号生成 ─────────────────────────────────────────────────────── */
+
+static void generate_samples(
+    float *samples,
+    uint32_t sample_index,
+    uint8_t channels,
+    uint16_t samples_per_channel,
+    uint8_t plot_format,
+    double rate,
+    double freq,
+    double amp)
+{
+    if (plot_format == XS_PLOT_FORMAT_XY) {
+        /* XY 模式: 每对 (cos, sin) 画一个圆 */
+        for (uint16_t i = 0; i < samples_per_channel; ++i) {
+            double t = (double)(sample_index + i) / rate;
+            samples[2 * i]     = (float)(amp * cos(2.0 * M_PI * freq * t));
+            samples[2 * i + 1] = (float)(amp * sin(2.0 * M_PI * freq * t));
+        }
+    } else {
+        /* interleaved 模式: 每个通道相位偏移 */
+        for (uint16_t i = 0; i < samples_per_channel; ++i) {
+            double t = (double)(sample_index + i) / rate;
+            for (uint8_t ch = 0; ch < channels; ++ch) {
+                double phase = 2.0 * M_PI * (double)ch / (double)channels;
+                samples[i * channels + ch] = (float)(amp * sin(2.0 * M_PI * freq * t + phase));
+            }
+        }
+    }
+}
+
+/* ── 用法 ─────────────────────────────────────────────────────────── */
+
+static void print_usage(const char *prog) {
+    printf("用法: %s <串口> [选项]\n", prog);
+    printf("\n选项:\n");
+    printf("  --baud <n>          波特率 (默认 %d)\n", DEFAULT_BAUDRATE);
+    printf("  --channels <n>      通道数 (默认 1, --format xy 时强制 2)\n");
+    printf("  --format <fmt>      格式: interleaved | xy (默认 interleaved)\n");
+    printf("  --rate <f>          采样率, samples/sec (默认 %.0f)\n", DEFAULT_RATE);
+    printf("  --freq <f>          正弦频率 Hz (默认 %.1f)\n", DEFAULT_FREQ);
+    printf("  --amp <f>           振幅 (默认 %.0f)\n", DEFAULT_AMP);
+    printf("  --text-interval <f> 文本输出间隔秒 (默认 %.1f)\n", DEFAULT_TEXT_INTERVAL);
+    printf("  --spc <n>           每帧每通道采样数 (默认 1)\n");
+    printf("  -h, --help          显示帮助\n");
+    printf("\n支持的波特率: 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600\n");
+    printf("\n示例:\n");
+    printf("  %s /dev/ttyUSB0\n", prog);
+    printf("  %s /dev/ttyUSB0 --baud 921600 --channels 2 --rate 2048 --freq 5\n", prog);
+    printf("  %s /dev/ttyUSB0 --format xy --amp 200 --text-interval 2.0\n", prog);
+    printf("  %s /dev/ttyUSB0 --channels 4 --spc 128 --rate 1024\n", prog);
+}
+
+/* ── 参数解析 ─────────────────────────────────────────────────────── */
+
+static int parse_args(int argc, char **argv, args_t *args) {
+    memset(args, 0, sizeof(*args));
+    args->baudrate       = DEFAULT_BAUDRATE;
+    args->channels       = 1;
+    args->samples_per_channel = 1;
+    args->plot_format    = XS_PLOT_FORMAT_INTERLEAVED;
+    args->rate           = DEFAULT_RATE;
+    args->freq           = DEFAULT_FREQ;
+    args->amp            = DEFAULT_AMP;
+    args->text_interval  = DEFAULT_TEXT_INTERVAL;
+
+    enum { OPT_BAUD = 256, OPT_CHANNELS, OPT_FORMAT, OPT_RATE, OPT_FREQ,
+           OPT_AMP, OPT_TEXT_INTERVAL, OPT_SPC };
+
+    static struct option long_opts[] = {
+        {"baud",          required_argument, 0, OPT_BAUD},
+        {"channels",      required_argument, 0, OPT_CHANNELS},
+        {"format",        required_argument, 0, OPT_FORMAT},
+        {"rate",          required_argument, 0, OPT_RATE},
+        {"freq",          required_argument, 0, OPT_FREQ},
+        {"amp",           required_argument, 0, OPT_AMP},
+        {"text-interval", required_argument, 0, OPT_TEXT_INTERVAL},
+        {"spc",           required_argument, 0, OPT_SPC},
+        {"help",          no_argument,       0, 'h'},
+        {0, 0, 0, 0}
+    };
+
+    int opt;
+    while ((opt = getopt_long(argc, argv, "h", long_opts, NULL)) != -1) {
+        switch (opt) {
+        case OPT_BAUD:
+            args->baudrate = atoi(optarg);
+            break;
+        case OPT_CHANNELS: {
+            int v = atoi(optarg);
+            if (v < 1 || v > MAX_CHANNELS) {
+                fprintf(stderr, "通道数必须在 1-%d 之间\n", MAX_CHANNELS);
+                return -1;
+            }
+            args->channels = (uint8_t)v;
+            break;
+        }
+        case OPT_FORMAT:
+            if (strcmp(optarg, "xy") == 0) {
+                args->plot_format = XS_PLOT_FORMAT_XY;
+            } else if (strcmp(optarg, "interleaved") == 0) {
+                args->plot_format = XS_PLOT_FORMAT_INTERLEAVED;
+            } else {
+                fprintf(stderr, "未知格式: %s (支持: interleaved, xy)\n", optarg);
+                return -1;
+            }
+            break;
+        case OPT_RATE:
+            args->rate = atof(optarg);
+            break;
+        case OPT_FREQ:
+            args->freq = atof(optarg);
+            break;
+        case OPT_AMP:
+            args->amp = atof(optarg);
+            break;
+        case OPT_TEXT_INTERVAL:
+            args->text_interval = atof(optarg);
+            break;
+        case OPT_SPC: {
+            int v = atoi(optarg);
+            if (v < 1 || v > MAX_SPC) {
+                fprintf(stderr, "spc 必须在 1-%d 之间\n", MAX_SPC);
+                return -1;
+            }
+            args->samples_per_channel = (uint16_t)v;
+            break;
+        }
+        case 'h':
+            print_usage(argv[0]);
+            exit(0);
+        default:
+            print_usage(argv[0]);
+            return -1;
+        }
+    }
+
+    if (optind >= argc) {
+        fprintf(stderr, "错误: 缺少串口路径\n");
+        print_usage(argv[0]);
+        return -1;
+    }
+    args->port = argv[optind];
+
+    /* 校验 */
+    if (args->plot_format == XS_PLOT_FORMAT_XY) {
+        if (args->channels != 2) {
+            fprintf(stderr, "错误: --format xy 要求 --channels 2\n");
+            return -1;
+        }
+    }
+    if (args->channels == 0) {
+        fprintf(stderr, "错误: --channels 必须 >= 1\n");
+        return -1;
+    }
+    if (args->rate <= 0.0) {
+        fprintf(stderr, "错误: --rate 必须为正数\n");
+        return -1;
+    }
+    if (args->text_interval <= 0.0) {
+        fprintf(stderr, "错误: --text-interval 必须为正数\n");
+        return -1;
+    }
+
+    return 0;
+}
+
+/* ── 发送 plot 帧 ─────────────────────────────────────────────────── */
+
+static int send_plot_frame(
+    int fd,
+    const float *samples,
+    uint8_t channels,
+    uint16_t samples_per_channel,
+    uint8_t plot_format,
+    uint8_t *packet_buf,
+    size_t packet_cap,
+    uint8_t *frame_buf,
+    size_t frame_cap)
+{
+    size_t frame_len = 0;
+    xs_status_t rc = xs_mixed_build_plot_frame_f32(
+        samples, channels, samples_per_channel, plot_format,
+        packet_buf, packet_cap,
+        frame_buf, frame_cap,
+        &frame_len);
+    if (rc != XS_OK) {
+        fprintf(stderr, "构建 plot 帧失败: %d\n", rc);
+        return -1;
+    }
+
+    size_t written = 0;
+    while (written < frame_len) {
+        ssize_t n = write(fd, frame_buf + written, frame_len - written);
+        if (n < 0) {
+            perror("write");
+            return -1;
+        }
+        written += (size_t)n;
+    }
+    return 0;
+}
+
+/* ── 发送文本行 ───────────────────────────────────────────────────── */
+
+static int send_text_line(
+    int fd,
+    uint32_t sample_index,
+    const float *current_samples,
+    uint8_t channels,
+    uint16_t samples_per_channel,
+    const char *format_name)
+{
+    char buf[TEXT_BUF_SIZE];
+    int pos = 0;
+
+    pos += snprintf(buf + pos, sizeof(buf) - pos,
+                    "sample=%-7u", sample_index);
+
+    if (channels > 1) {
+        for (uint8_t ch = 0; ch < channels; ++ch) {
+            pos += snprintf(buf + pos, sizeof(buf) - pos,
+                            " ch%d=%8.3f", ch + 1, (double)current_samples[ch]);
+        }
+    } else {
+        pos += snprintf(buf + pos, sizeof(buf) - pos,
+                        " value=%8.3f", (double)current_samples[0]);
+    }
+
+    pos += snprintf(buf + pos, sizeof(buf) - pos,
+                    " [fmt=%s, ch=%u, spc=%u]\n",
+                    format_name, channels, samples_per_channel);
+
+    /* 确保不超过缓冲 */
+    if (pos >= (int)sizeof(buf)) pos = (int)sizeof(buf) - 1;
+
+    size_t len = (size_t)pos;
+    size_t written = 0;
+    while (written < len) {
+        ssize_t n = write(fd, buf + written, len - written);
+        if (n < 0) {
+            perror("write");
+            return -1;
+        }
+        written += (size_t)n;
+    }
+    return 0;
+}
+
+/* ── 主函数 ───────────────────────────────────────────────────────── */
+
+int main(int argc, char **argv) {
+    args_t args;
+    if (parse_args(argc, argv, &args) < 0) {
+        return 1;
+    }
+
+    /* 打印配置 */
+    const char *format_name = (args.plot_format == XS_PLOT_FORMAT_XY) ? "xy" : "interleaved";
+    double frame_interval = (double)args.samples_per_channel / args.rate;
+    double frame_rate = args.rate / (double)args.samples_per_channel;
+
+    printf("═══ pipeview Serial Plot Generator ═══\n");
+    printf("串口:    %s @ %d baud\n", args.port, args.baudrate);
+    printf("通道:    %u  格式: %s\n", args.channels, format_name);
+    printf("频率:    %.1f Hz  振幅: %.1f\n", args.freq, args.amp);
+    printf("采样率:  %.0f samples/sec  spc: %u\n", args.rate, args.samples_per_channel);
+    printf("帧间隔:  %.3f ms  (%.2f fps)\n", frame_interval * 1000.0, frame_rate);
+    printf("文本间隔: %.1f s\n", args.text_interval);
+    printf("═══════════════════════════════════════\n");
+
+    /* 分配缓冲 */
+    uint32_t value_count = (uint32_t)args.channels * (uint32_t)args.samples_per_channel;
+    uint32_t payload_len = value_count * 4;
+    size_t   packet_cap = (size_t)XS_PLOT_HEADER_SIZE + (size_t)payload_len;
+    size_t   frame_cap = 2u + xs_cobs_max_encoded_size(packet_cap) + 1u;
+
+    uint8_t *packet_buf = malloc(packet_cap);
+    uint8_t *frame_buf  = malloc(frame_cap);
+    float   *samples    = malloc((size_t)value_count * sizeof(float));
+
+    if (!packet_buf || !frame_buf || !samples) {
+        fprintf(stderr, "内存分配失败\n");
+        free(packet_buf); free(frame_buf); free(samples);
+        return 1;
+    }
+
+    /* 打开串口 */
+    int fd = serial_open(args.port, args.baudrate);
+    if (fd < 0) {
+        fprintf(stderr, "无法打开串口 %s\n", args.port);
+        free(packet_buf); free(frame_buf); free(samples);
+        return 1;
+    }
+    printf("已打开 %s\n\n", args.port);
+
+    /* 设置信号处理 */
+    struct sigaction sa;
+    memset(&sa, 0, sizeof(sa));
+    sa.sa_handler = sigint_handler;
+    sigaction(SIGINT, &sa, NULL);
+    sigaction(SIGTERM, &sa, NULL);
+
+    /* 主循环 */
+    uint32_t sample_index = 0;
+    uint64_t frame_count  = 0;
+    uint64_t text_count   = 0;
+    double   started_at   = now_sec();
+    double   next_text_at = started_at + args.text_interval;
+
+    printf("开始发送 (Ctrl+C 停止) ...\n");
+
+    while (g_running) {
+        /* 生成采样数据 */
+        generate_samples(samples, sample_index,
+                         args.channels, args.samples_per_channel,
+                         args.plot_format, args.rate, args.freq, args.amp);
+
+        /* 发送 plot 帧 */
+        if (send_plot_frame(fd, samples,
+                            args.channels, args.samples_per_channel,
+                            args.plot_format,
+                            packet_buf, packet_cap,
+                            frame_buf, frame_cap) < 0) {
+            fprintf(stderr, "发送失败, 退出\n");
+            break;
+        }
+        frame_count++;
+
+        /* 检查是否需要发送文本行 */
+        double now = now_sec();
+        if (now >= next_text_at) {
+            if (send_text_line(fd, sample_index, samples,
+                               args.channels, args.samples_per_channel,
+                               format_name) < 0) {
+                fprintf(stderr, "发送文本失败, 退出\n");
+                break;
+            }
+            text_count++;
+            next_text_at += args.text_interval;
+        }
+
+        sample_index += args.samples_per_channel;
+
+        /* 帧间隔时序控制 */
+        double elapsed = now_sec() - started_at;
+        double target = (double)frame_count * frame_interval;
+        double wait = target - elapsed;
+        if (wait > 0.0) {
+            sleep_sec(wait);
+        }
+    }
+
+    double total_time = now_sec() - started_at;
+    printf("\n");
+    printf("═══ 已停止 ═══\n");
+    printf("运行时间: %.1f 秒\n", total_time);
+    printf("Plot 帧:  %lu  (%.1f fps)\n",
+           (unsigned long)frame_count,
+           total_time > 0.0 ? (double)frame_count / total_time : 0.0);
+    printf("文本行:   %lu\n", (unsigned long)text_count);
+
+    /* 清理 */
+    tcflush(fd, TCIOFLUSH);
+    close(fd);
+    free(packet_buf);
+    free(frame_buf);
+    free(samples);
+
+    return 0;
+}

tools/test_text_serial.c

@@ -0,0 +1,270 @@
+/*
+ * test_text_serial.c — 持续向串口发送纯文本正弦波数据流
+ *
+ * 编译 (Linux):
+ *   gcc -std=c11 -Wall -Wextra -O2 -o test_text_serial tools/test_text_serial.c -lm
+ *
+ * 用法:
+ *   ./test_text_serial /dev/ttyUSB0
+ *   ./test_text_serial /dev/ttyUSB0 --baud 115200 --channels 2 --rate 100 --freq 2.0 --amp 150
+ *   ./test_text_serial --help
+ *
+ * 输出格式 (每行):
+ *   sample=123 ch1=100.000 ch2=0.000
+ *
+ * 串口参数: 8N1, 无流控, 默认 115200 baud
+ */
+
+#define _POSIX_C_SOURCE 200809L
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <math.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <time.h>
+#include <unistd.h>
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+#define DEFAULT_BAUDRATE      115200
+#define DEFAULT_RATE          100.0      /* lines/sec */
+#define DEFAULT_FREQ          1.0
+#define DEFAULT_AMP           100.0
+#define MAX_CHANNELS          8
+#define LINE_BUF_SIZE         512
+
+static volatile sig_atomic_t g_running = 1;
+
+static void sigint_handler(int sig) {
+    (void)sig;
+    g_running = 0;
+}
+
+typedef struct {
+    const char *port;
+    int         baudrate;
+    uint8_t     channels;
+    double      rate;
+    double      freq;
+    double      amp;
+} args_t;
+
+static int serial_open(const char *path, int baudrate) {
+    int fd = open(path, O_RDWR | O_NOCTTY | O_NONBLOCK);
+    if (fd < 0) { perror("open"); return -1; }
+
+    int flags = fcntl(fd, F_GETFL, 0);
+    if (flags < 0) { perror("fcntl"); close(fd); return -1; }
+    flags &= ~O_NONBLOCK;
+    if (fcntl(fd, F_SETFL, flags) < 0) { perror("fcntl"); close(fd); return -1; }
+
+    struct termios tty;
+    memset(&tty, 0, sizeof(tty));
+    if (tcgetattr(fd, &tty) < 0) { perror("tcgetattr"); close(fd); return -1; }
+
+    tty.c_iflag = IGNBRK;
+    tty.c_oflag = 0;
+    tty.c_cflag = CS8 | CREAD | CLOCAL;
+    tty.c_lflag = 0;
+    tty.c_cc[VMIN]  = 1;
+    tty.c_cc[VTIME] = 0;
+
+    speed_t speed = B115200;
+    switch (baudrate) {
+        case 9600:    speed = B9600;    break;
+        case 19200:   speed = B19200;   break;
+        case 38400:   speed = B38400;   break;
+        case 57600:   speed = B57600;   break;
+        case 115200:  speed = B115200;  break;
+        case 230400:  speed = B230400;  break;
+        case 460800:  speed = B460800;  break;
+        case 921600:  speed = B921600;  break;
+        default:
+            fprintf(stderr, "不支持的波特率: %d\n", baudrate);
+            close(fd);
+            return -1;
+    }
+    cfsetispeed(&tty, speed);
+    cfsetospeed(&tty, speed);
+
+#ifdef CRTSCTS
+    tty.c_cflag &= ~CRTSCTS;
+#endif
+    tty.c_iflag &= ~(IXON | IXOFF | IXANY);
+
+    if (tcsetattr(fd, TCSANOW, &tty) < 0) {
+        perror("tcsetattr");
+        close(fd);
+        return -1;
+    }
+    tcflush(fd, TCIOFLUSH);
+    return fd;
+}
+
+static double now_sec(void) {
+    struct timespec ts;
+    clock_gettime(CLOCK_MONOTONIC, &ts);
+    return (double)ts.tv_sec + (double)ts.tv_nsec * 1e-9;
+}
+
+static void sleep_sec(double seconds) {
+    if (seconds <= 0.0) return;
+    struct timespec ts;
+    ts.tv_sec  = (time_t)seconds;
+    ts.tv_nsec = (long)((seconds - (time_t)seconds) * 1e9);
+    clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL);
+}
+
+static int format_line(char *buf, size_t cap, uint32_t sample, const float *values, uint8_t channels) {
+    int pos = snprintf(buf, cap, "sample=%-7u", sample);
+    for (uint8_t ch = 0; ch < channels; ++ch) {
+        pos += snprintf(buf + pos, cap - (size_t)pos, " ch%d=%8.3f", ch + 1, (double)values[ch]);
+    }
+    pos += snprintf(buf + pos, cap - (size_t)pos, "\n");
+    return pos >= (int)cap ? (int)cap - 1 : pos;
+}
+
+static void print_usage(const char *prog) {
+    printf("用法: %s <串口> [选项]\n", prog);
+    printf("\n选项:\n");
+    printf("  --baud <n>      波特率 (默认 %d)\n", DEFAULT_BAUDRATE);
+    printf("  --channels <n>  通道数 (默认 1)\n");
+    printf("  --rate <f>      行/秒 输出速率 (默认 %.0f)\n", DEFAULT_RATE);
+    printf("  --freq <f>      正弦频率 Hz (默认 %.1f)\n", DEFAULT_FREQ);
+    printf("  --amp <f>       振幅 (默认 %.0f)\n", DEFAULT_AMP);
+    printf("  -h, --help      显示帮助\n");
+    printf("\n示例:\n");
+    printf("  %s /dev/ttyUSB0\n", prog);
+    printf("  %s /dev/ttyUSB0 --channels 2 --rate 50 --freq 3\n", prog);
+    printf("  %s /dev/ttyUSB0 --baud 921600 --rate 1000\n", prog);
+}
+
+static int parse_args(int argc, char **argv, args_t *args) {
+    memset(args, 0, sizeof(*args));
+    args->baudrate   = DEFAULT_BAUDRATE;
+    args->channels   = 1;
+    args->rate       = DEFAULT_RATE;
+    args->freq       = DEFAULT_FREQ;
+    args->amp        = DEFAULT_AMP;
+
+    enum { OPT_BAUD = 256, OPT_CHANNELS, OPT_RATE, OPT_FREQ, OPT_AMP };
+
+    static struct option long_opts[] = {
+        {"baud",     required_argument, 0, OPT_BAUD},
+        {"channels", required_argument, 0, OPT_CHANNELS},
+        {"rate",     required_argument, 0, OPT_RATE},
+        {"freq",     required_argument, 0, OPT_FREQ},
+        {"amp",      required_argument, 0, OPT_AMP},
+        {"help",     no_argument,       0, 'h'},
+        {0, 0, 0, 0}
+    };
+
+    int opt;
+    while ((opt = getopt_long(argc, argv, "h", long_opts, NULL)) != -1) {
+        switch (opt) {
+        case OPT_BAUD:     args->baudrate = atoi(optarg); break;
+        case OPT_CHANNELS: {
+            int v = atoi(optarg);
+            if (v < 1 || v > MAX_CHANNELS) {
+                fprintf(stderr, "通道数必须在 1-%d 之间\n", MAX_CHANNELS);
+                return -1;
+            }
+            args->channels = (uint8_t)v;
+            break;
+        }
+        case OPT_RATE:     args->rate = atof(optarg); break;
+        case OPT_FREQ:     args->freq = atof(optarg); break;
+        case OPT_AMP:      args->amp = atof(optarg); break;
+        case 'h':          print_usage(argv[0]); exit(0);
+        default:           print_usage(argv[0]); return -1;
+        }
+    }
+
+    if (optind >= argc) {
+        fprintf(stderr, "错误: 缺少串口路径\n");
+        print_usage(argv[0]);
+        return -1;
+    }
+    args->port = argv[optind];
+
+    if (args->rate <= 0.0)  { fprintf(stderr, "错误: --rate 必须为正数\n");  return -1; }
+
+    return 0;
+}
+
+int main(int argc, char **argv) {
+    args_t args;
+    if (parse_args(argc, argv, &args) < 0) return 1;
+
+    double interval = 1.0 / args.rate;
+
+    printf("═══ pipeview Plain Text Generator ═══\n");
+    printf("串口:   %s @ %d baud\n", args.port, args.baudrate);
+    printf("通道:   %u  振幅: %.1f  频率: %.1f Hz\n", args.channels, args.amp, args.freq);
+    printf("速率:   %.0f lines/sec  (间隔 %.3f ms)\n", args.rate, interval * 1000.0);
+    printf("═════════════════════════════════════\n");
+
+    float values[MAX_CHANNELS];
+    char  line[LINE_BUF_SIZE];
+
+    int fd = serial_open(args.port, args.baudrate);
+    if (fd < 0) { fprintf(stderr, "无法打开串口 %s\n", args.port); return 1; }
+    printf("已打开 %s\n\n开始发送 (Ctrl+C 停止) ...\n", args.port);
+
+    struct sigaction sa;
+    memset(&sa, 0, sizeof(sa));
+    sa.sa_handler = sigint_handler;
+    sigaction(SIGINT, &sa, NULL);
+    sigaction(SIGTERM, &sa, NULL);
+
+    uint32_t sample_index = 0;
+    uint64_t line_count   = 0;
+    double   started_at   = now_sec();
+
+    while (g_running) {
+        double t = (double)sample_index / args.rate;
+        for (uint8_t ch = 0; ch < args.channels; ++ch) {
+            double phase = 2.0 * M_PI * (double)ch / (double)args.channels;
+            values[ch] = (float)(args.amp * sin(2.0 * M_PI * args.freq * t + phase));
+        }
+
+        int len = format_line(line, sizeof(line), sample_index, values, args.channels);
+        size_t written = 0;
+        while (written < (size_t)len) {
+            ssize_t n = write(fd, line + written, (size_t)len - written);
+            if (n < 0) { perror("write"); goto cleanup; }
+            written += (size_t)n;
+        }
+        line_count++;
+
+        double elapsed = now_sec() - started_at;
+        double target = (double)line_count * interval;
+        double wait = target - elapsed;
+        if (wait > 0.0) sleep_sec(wait);
+
+        sample_index++;
+    }
+
+cleanup: {
+    double total_time = now_sec() - started_at;
+    printf("\n═══ 已停止 ═══\n");
+    printf("运行时间: %.1f 秒\n", total_time);
+    printf("行数:     %lu  (%.1f lines/sec)\n",
+           (unsigned long)line_count,
+           total_time > 0.0 ? (double)line_count / total_time : 0.0);
+
+    tcflush(fd, TCIOFLUSH);
+    close(fd);
+    return 0;
+}
+}