Detach GUI from terminal on linux, hide console on Windows

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__/

Cargo.lock

@@ -3262,6 +3262,74 @@ 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 = [
+ "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 = [
+ "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"
@@ -5750,71 +5818,6 @@ 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/xserial-client",
-    "crates/xserial-tui",
-    "crates/xserial-gui",
+    "crates/pipeview-core",
+    "crates/pipeview-client",
+    "crates/pipeview-tui",
+    "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 +1,5 @@
 use serde::{Deserialize, Serialize};
-use xserial_core::frame::{
+use pipeview_core::frame::{
     Endian, Framer,
     cobs::CobsFramer,
     fixed::FixedLengthFramer,
@@ -7,14 +7,17 @@ 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 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> {
-        match self {
+    pub fn build(self) -> Result<Box<dyn Framer>> {
+        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> {
-        match self {
-            DecoderConfig::Text { encoding } => Box::new(TextDecoder::new(encoding)),
+    pub fn build(self) -> Result<Box<dyn ProtocolDecoder>> {
+        Ok(match self {
+            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 xserial_core::protocol::plot::{PlotFormat, SampleType};
-    use xserial_core::protocol::text::TextEncoding;
-    use xserial_core::transport::TransportConfig;
+    use pipeview_core::protocol::Endian;
+    use pipeview_core::protocol::plot::{PlotFormat, SampleType};
+    use pipeview_core::protocol::text::TextEncoding;
+    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 tracing::warn;
+use pipeview_core::frame::Framer;
+use pipeview_core::protocol::plot::{PlotFormat, PlotFrame, SampleType};
+use pipeview_core::protocol::{DecodedData, ProtocolDecoder};
+
+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 open: Value = xserial.get("open").unwrap();
+        let pipeview: Table = lua.globals().get("pipeview").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

@@ -8,7 +8,7 @@ use std::time::Duration;
 use mlua::{Function, Lua, LuaSerdeExt, RegistryKey, UserData, UserDataMethods, Value, Variadic};
 use tokio::sync::mpsc;
 use tokio::task::JoinHandle;
-use xserial_core::protocol::DecodedData;
+use pipeview_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 Some(task) = relay_task.take() {
+        if let Ok(mut relay_task) = self.relay_task.lock()
+            && 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 xserial_core::transport::Connection;
+use pipeview_core::pipeline::{MultiPipeline, Pipeline};
+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 Some(task) = task.take() {
+            if let Ok(mut task) = self.inner.task.try_lock()
+                && 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.decoder.clone().build(),
+                pipeline.framer.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 let Err(err) = self.connect().await {
+                if self.conn.is_none()
+                    && 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 {
-    io::Error::new(io::ErrorKind::Other, err.to_string())
+fn to_io_error(err: pipeview_core::error::Error) -> std::io::Error {
+    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")
-        xserial.sleep(50)
-        xserial.log("test end")
+        pipeview.log("test start")
+        pipeview.sleep(50)
+        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)
-                xserial.sleep(10)
+                pipeview.poll(1)
+                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)
-                xserial.sleep(10)
+                pipeview.poll(1)
+                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)
-        xserial.poll(10)
+        pipeview.sleep(250)
+        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 xserial_client::config::{DecoderConfig, FramerConfig, PipelineConfig, SessionConfig};
-use xserial_client::session::{Session, SessionEvent};
-use xserial_core::protocol::DecodedData;
-use xserial_core::transport::TransportConfig;
+use pipeview_client::SessionManager;
+use pipeview_client::config::{DecoderConfig, FramerConfig, PipelineConfig, SessionConfig};
+use pipeview_client::session::{Session, SessionEvent};
+use pipeview_core::protocol::DecodedData;
+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() {
-                SessionEvent::Data(_, entry) => {
-                    if let DecodedData::Text(s) = entry.data {
+            if let SessionEvent::Data(_, entry) = rx.recv().await.unwrap()
+                && 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() {
-                SessionEvent::Data(_, entry) => {
+            if let SessionEvent::Data(_, entry) = rx.recv().await.unwrap() {
                 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 decoded.len() <= self.config.max_plot_frame {
+        if let Some(decoded) = cobs_decode(&self.plot_buf)
+            && 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 xserial_core::frame::line::{LineFramer, LineConfig};
-/// use xserial_core::frame::fixed::FixedLengthFramer;
-/// use xserial_core::protocol::text::{TextDecoder, TextEncoding};
-/// use xserial_core::protocol::hex::{HexDecoder, HexConfig};
+/// use pipeview_core::pipeline::{MultiPipeline, Pipeline};
+/// use pipeview_core::frame::line::{LineFramer, LineConfig};
+/// use pipeview_core::frame::fixed::FixedLengthFramer;
+/// use pipeview_core::protocol::text::{TextDecoder, TextEncoding};
+/// 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 +169,28 @@ 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 +258,8 @@ mod tests {
             parity: SerialParity::None,
             stop_bits: SerialStopBits::One,
             flow_control: SerialFlowControl::None,
+            dtr: false,
+            rts: false,
         }
     }
 
@@ -254,11 +294,11 @@ 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 +352,8 @@ mod tests {
             parity: SerialParity::None,
             stop_bits: SerialStopBits::One,
             flow_control: SerialFlowControl::None,
+            dtr: false,
+            rts: false,
         };
         let _ = format!("{:?}", cfg);
 
@@ -371,6 +413,8 @@ mod tests {
                 parity,
                 stop_bits,
                 flow_control,
+                dtr,
+                rts,
             } => {
                 assert_eq!(port, "COM1");
                 assert_eq!(baud_rate, 9600);
@@ -378,6 +422,8 @@ 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 +441,8 @@ mod tests {
                 parity,
                 stop_bits,
                 flow_control,
+                dtr,
+                rts,
             } => {
                 assert_eq!(port, "COM2");
                 assert_eq!(baud_rate, 57600);
@@ -402,6 +450,8 @@ 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

@@ -1,6 +1,7 @@
 use async_trait::async_trait;
 use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
 use tokio_serial::{DataBits, FlowControl, Parity, SerialPortBuilderExt, SerialStream, StopBits};
+use serialport::SerialPort;
 use tracing::{debug, info, warn};
 
 use super::{Transport, TransportType};
@@ -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 +272,17 @@ 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 +331,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+        true,
+        true,
         );
         assert_eq!(transport.port_name(), "COM1");
         assert_eq!(transport.baud_rate(), 115200);
@@ -296,6 +347,8 @@ mod tests {
             SerialParity::Even,
             SerialStopBits::Two,
             SerialFlowControl::Hardware,
+        true,
+        true,
         );
         assert_eq!(transport.port_name(), "COM3");
         assert_eq!(transport.baud_rate(), 9600);
@@ -314,6 +367,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+        true,
+        true,
         );
         assert_eq!(transport.name(), "COM1");
     }
@@ -327,6 +382,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+        true,
+        true,
         );
         assert_eq!(transport.transport_type(), TransportType::Serial);
     }
@@ -340,6 +397,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+        true,
+        true,
         );
         assert!(!transport.is_connected());
     }
@@ -368,6 +427,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+        true,
+        true,
         );
         let pinned = Pin::new(&mut transport);
         let mut buf_data = [0u8; 16];
@@ -391,6 +452,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+        true,
+        true,
         );
         let pinned = Pin::new(&mut transport);
         let data = b"hello";
@@ -411,6 +474,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+        true,
+        true,
         );
         let pinned = Pin::new(&mut transport);
         let waker = noop_waker();
@@ -430,6 +495,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+        true,
+        true,
         );
         let pinned = Pin::new(&mut transport);
         let waker = noop_waker();
@@ -451,6 +518,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+        true,
+        true,
         );
         assert_eq!(transport.name(), "COM1");
     }
@@ -464,6 +533,8 @@ mod tests {
             SerialParity::None,
             SerialStopBits::One,
             SerialFlowControl::None,
+        true,
+        true,
         );
         assert_eq!(transport.transport_type(), TransportType::Serial);
     }
@@ -477,6 +548,8 @@ 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
-        .iter()
-        .filter_map(|f| decoder.decode(f))
-        .collect();
+    let results: Vec<DecodedData> = frames.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" }
-xserial-client = { path = "../xserial-client" }
+pipeview-core = { path = "../pipeview-core" }
+pipeview-client = { path = "../pipeview-client" }
 tokio = { workspace = true }
 egui = { workspace = true }
 eframe = { workspace = true }

crates/pipeview-gui/src/app_state.rs

@@ -0,0 +1,175 @@
+use std::env;
+use std::fs;
+use std::io;
+use std::path::{Path, PathBuf};
+
+use serde::{Deserialize, Serialize};
+use tracing::warn;
+use pipeview_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,
+    #[serde(default = "default_true")]
+    pub show_direction: bool,
+    #[serde(default = "default_true")]
+    pub show_pipeline: bool,
+}
+
+pub fn load_gui_state() -> PersistedGuiState {
+    match load_gui_state_from_path(&gui_state_path()) {
+        Ok(state) => state,
+        Err(err) if err.kind() == io::ErrorKind::NotFound => PersistedGuiState::default(),
+        Err(err) => {
+            warn!(error = %err, "Failed to load persisted GUI state");
+            PersistedGuiState::default()
+        }
+    }
+}
+
+pub fn save_gui_state(state: &PersistedGuiState) {
+    if let Err(err) = save_gui_state_to_path(state, &gui_state_path()) {
+        warn!(error = %err, "Failed to persist GUI state");
+    }
+}
+
+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("pipeview")
+                    .join(GUI_STATE_FILE_NAME);
+            }
+            if let Some(path) = get_env("LOCALAPPDATA").filter(|path| !path.trim().is_empty()) {
+                return PathBuf::from(path)
+                    .join("pipeview")
+                    .join(GUI_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(GUI_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(GUI_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(GUI_STATE_FILE_NAME);
+            }
+        }
+    }
+
+    PathBuf::from(GUI_STATE_FILE_NAME)
+}
+
+fn load_gui_state_from_path(path: &Path) -> io::Result<PersistedGuiState> {
+    let text = fs::read_to_string(path)?;
+    serde_json::from_str(&text).map_err(io::Error::other)
+}
+
+fn save_gui_state_to_path(state: &PersistedGuiState, 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
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::time::{SystemTime, UNIX_EPOCH};
+    use pipeview_core::transport::TransportConfig;
+
+    #[test]
+    fn windows_gui_state_path_uses_appdata() {
+        let path = gui_state_path_for_os_and_env("windows", |key| match key {
+            "APPDATA" => Some(String::from(r"C:\Users\Test\AppData\Roaming")),
+            _ => None,
+        });
+        assert_eq!(
+            path,
+            PathBuf::from(r"C:\Users\Test\AppData\Roaming")
+                .join("pipeview")
+                .join(GUI_STATE_FILE_NAME)
+        );
+    }
+
+    #[test]
+    fn gui_state_roundtrip() {
+        let unique = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .unwrap()
+            .as_nanos();
+        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 {
+                transport: TransportConfig::Tcp {
+                    addr: String::from("127.0.0.1:9000"),
+                },
+                ..SessionConfig::default()
+            }],
+            sessions_log: vec![SessionLogConfig::default()],
+            active: 0,
+            show_timestamp: false,
+            show_direction: true,
+            show_pipeline: false,
+        };
+
+        save_gui_state_to_path(&state, &path).unwrap();
+        let loaded = load_gui_state_from_path(&path).unwrap();
+        assert_eq!(loaded.sessions.len(), 1);
+        assert!(!loaded.show_timestamp);
+        assert!(loaded.show_direction);
+        assert!(!loaded.show_pipeline);
+
+        let _ = fs::remove_file(&path);
+        let _ = fs::remove_dir_all(&dir);
+    }
+}

crates/pipeview-gui/src/buffers.rs

@@ -1,9 +1,10 @@
+use egui_plot::PlotBounds;
 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};
+use pipeview_client::RingBuffer;
+use pipeview_client::event::DecodedEntry;
+use pipeview_core::protocol::DecodedData;
+use pipeview_core::protocol::plot::{PlotFormat, PlotFrame};
 
 #[derive(Clone)]
 pub enum LineDirection {
@@ -51,8 +52,12 @@ impl TextBuffer {
         });
     }
 
-    pub fn iter(&self) -> impl Iterator<Item = &ConsoleLine> {
-        self.lines.iter()
+    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) {
@@ -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> {
-        self.lines.iter()
+    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) {
@@ -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
-            .points
-            .iter()
-            .copied()
-            .filter(|point| point[0] >= x_min && point[0] <= x_max)
-            .collect();
-        if visible.len() <= max_points {
-            return visible;
+        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 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() {
-                let point = visible[start];
+            while let Some(point) = points.peek().copied() {
                 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()
-                .find(|series| series.name == series_name)
+                .iter()
+                .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()
-            .find(|series| series.name == series_name)
+            .iter()
+            .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 {
-            series.points.pop_front();
+            self.note_xy_point(point);
         }
     }
 
     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 xserial_core::protocol::DecodedData;
-    use xserial_core::protocol::plot::{PlotFrame, SampleType};
+    use pipeview_client::event::DecodedEntry;
+    use pipeview_core::protocol::DecodedData;
+    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 +1,64 @@
+#![cfg_attr(windows, windows_subsystem = "windows")]
+
+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/console.rs

@@ -0,0 +1,129 @@
+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 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()
+    }
+}
+
+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() => {
+            highlight_matches(&full_text, &state.query, state.case_sensitive, default, highlight)
+        }
+        _ => LayoutJob::single_section(full_text, default),
+    }
+}

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

@@ -0,0 +1,134 @@
+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 {
-    fn default() -> Self {
-        Self {
-            lock_x: false,
-            lock_y: false,
-            box_zoom: false,
-            follow_latest: false,
-            last_bounds: None,
-        }
-    }
+pub struct PlotRenderOutput {
+    pub stats: PlotRenderStats,
+    pub toggle_detached: bool,
 }
 
-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 => {
-                    series.render_points_time_series(
+                PlotSeriesKind::TimeSeries => 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));
         }
     });
-}
-
-fn plot_bounds(buf: &PlotBuffer) -> Option<PlotBounds> {
-    let mut bounds = PlotBounds::NOTHING;
-
-    for series in buf.iter() {
-        for [x, y] in series.points() {
-            if x.is_finite() && y.is_finite() {
-                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)
+
+    PlotRenderOutput {
+        stats: PlotRenderStats {
+            series_count: buf.series_len(),
+            stored_points: buf.total_points(),
+            rendered_points,
+        },
+        toggle_detached,
+    }
 }

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

@@ -0,0 +1,68 @@
+use crate::app::ConnectionStatus;
+use egui::{Color32, RichText, Ui};
+
+pub struct SessionListItem {
+    pub id: u64,
+    pub status: ConnectionStatus,
+    pub transport_summary: String,
+}
+
+pub fn render(
+    ui: &mut Ui,
+    sessions: &[SessionListItem],
+    active: &mut usize,
+    on_new: &mut bool,
+    on_edit: &mut Option<usize>,
+    on_delete: &mut Option<usize>,
+) {
+    ui.heading("Sessions");
+
+    if ui
+        .button(RichText::new("+ New Session").color(Color32::GREEN))
+        .clicked()
+    {
+        *on_new = true;
+    }
+
+    ui.separator();
+
+    for (i, session) in sessions.iter().enumerate() {
+        let (color, status_tag) = match &session.status {
+            ConnectionStatus::Connected => (Color32::GREEN, "[connected]"),
+            ConnectionStatus::Disconnected => (Color32::GRAY, "[disconnected]"),
+            ConnectionStatus::Connecting => (Color32::YELLOW, "[connecting]"),
+            ConnectionStatus::Error(_) => (Color32::RED, "[error]"),
+        };
+
+        let label = format!(
+            "{} 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();
+
+    if ui
+        .button(RichText::new("Delete").color(Color32::RED))
+        .clicked()
+    {
+        *on_delete = Some(*active);
+    }
+}

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 +1,142 @@
+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,
@@ -60,7 +55,21 @@ impl Default for UiFontSettings {
 }
 
 pub fn discover_font_candidates() -> Vec<FontCandidate> {
-    discover_via_fc_list().unwrap_or_else(discover_via_fallback_paths)
+    let mut candidates = discover_via_fc_list().unwrap_or_default();
+    let mut seen_paths = candidates
+        .iter()
+        .map(|candidate| candidate.path.clone())
+        .collect::<std::collections::BTreeSet<_>>();
+
+    for candidate in discover_via_font_directories() {
+        if seen_paths.insert(candidate.path.clone()) {
+            candidates.push(candidate);
+        }
+    }
+
+    candidates.sort_by(|a, b| a.label.cmp(&b.label).then(a.path.cmp(&b.path)));
+    candidates.dedup_by(|a, b| a.path == b.path);
+    candidates
 }
 
 pub fn load_font_settings() -> UiFontSettings {
@@ -143,9 +152,7 @@ fn load_selected_font(
 ) -> Option<(String, Vec<u8>)> {
     match choice {
         FontChoice::Default => None,
-        FontChoice::Auto => {
-            load_auto_font(candidates, already_loaded)
-        }
+        FontChoice::Auto => load_auto_font(candidates, already_loaded),
         FontChoice::System(id) => {
             let candidate = candidates.iter().find(|candidate| &candidate.id == id)?;
             if already_loaded.iter().any(|loaded| loaded == &candidate.id) {
@@ -195,19 +202,22 @@ fn apply_font_size(style: &mut Style, settings: &UiFontSettings) {
     style
         .text_styles
         .insert(TextStyle::Body, FontId::proportional(settings.ui_font_size));
-    style
-        .text_styles
-        .insert(TextStyle::Button, FontId::proportional(settings.ui_font_size));
+    style.text_styles.insert(
+        TextStyle::Button,
+        FontId::proportional(settings.ui_font_size),
+    );
     style.text_styles.insert(
         TextStyle::Monospace,
         FontId::monospace(settings.monospace_font_size),
     );
-    style
-        .text_styles
-        .insert(TextStyle::Small, FontId::proportional((settings.ui_font_size - 2.0).max(8.0)));
-    style
-        .text_styles
-        .insert(TextStyle::Heading, FontId::proportional(settings.heading_font_size));
+    style.text_styles.insert(
+        TextStyle::Small,
+        FontId::proportional((settings.ui_font_size - 2.0).max(8.0)),
+    );
+    style.text_styles.insert(
+        TextStyle::Heading,
+        FontId::proportional(settings.heading_font_size),
+    );
 }
 
 fn discover_via_fc_list() -> Option<Vec<FontCandidate>> {
@@ -262,38 +272,47 @@ fn discover_via_fc_list() -> Option<Vec<FontCandidate>> {
         });
     }
 
-    candidates.sort_by(|a, b| a.label.cmp(&b.label).then(a.path.cmp(&b.path)));
-    candidates.dedup_by(|a, b| a.path == b.path);
     (!candidates.is_empty()).then_some(candidates)
 }
 
-fn discover_via_fallback_paths() -> Vec<FontCandidate> {
-    let fallback_paths = [
-        "/usr/share/fonts/google-noto-sans-cjk-fonts/NotoSansCJK-Regular.ttc",
-        "/usr/share/fonts/google-noto-sans-cjk-vf-fonts/NotoSansCJK-VF.ttc",
-        "/usr/share/fonts/google-droid-sans-fonts/DroidSansFallbackFull.ttf",
-    ];
-
-    fallback_paths
+fn discover_via_font_directories() -> Vec<FontCandidate> {
+    let mut candidates = Vec::new();
+    let mut stack = platform_font_directories()
         .into_iter()
-        .filter_map(|path| {
-            fs::metadata(path).ok().map(|_| {
-                let stem = Path::new(path)
-                    .file_stem()
-                    .and_then(|name| name.to_str())
-                    .unwrap_or("font")
-                    .to_owned();
-                FontCandidate {
-                    id: sanitize_id(&stem),
-                    label: stem.clone(),
-                    display_label: format!("{stem}  [CJK]"),
-                    path: path.to_owned(),
-                    likely_cjk: true,
-                    search_key: build_search_key(&stem, "Regular", path),
+        .filter(|path| path.is_dir())
+        .map(|path| (path, 0usize))
+        .collect::<Vec<_>>();
+
+    while let Some((dir, depth)) = stack.pop() {
+        let entries = match fs::read_dir(&dir) {
+            Ok(entries) => entries,
+            Err(err) => {
+                warn!(path = %dir.display(), error = %err, "Failed to read font directory");
+                continue;
             }
-            })
-        })
-        .collect()
+        };
+
+        for entry in entries.flatten() {
+            let path = entry.path();
+            let file_type = match entry.file_type() {
+                Ok(file_type) => file_type,
+                Err(_) => continue,
+            };
+
+            if file_type.is_dir() {
+                if depth < 4 {
+                    stack.push((path, depth + 1));
+                }
+                continue;
+            }
+
+            if let Some(candidate) = font_candidate_from_path(&path) {
+                candidates.push(candidate);
+            }
+        }
+    }
+
+    candidates
 }
 
 fn font_display_label(family: &str, style: &str, path: &str) -> String {
@@ -315,24 +334,7 @@ fn build_search_key(family: &str, style: &str, path: &str) -> String {
 }
 
 fn font_settings_path() -> PathBuf {
-    if let Ok(path) = env::var("XDG_CONFIG_HOME") {
-        let trimmed = path.trim();
-        if !trimmed.is_empty() {
-            return PathBuf::from(trimmed).join("xserial").join(FONT_SETTINGS_FILE_NAME);
-        }
-    }
-
-    if let Ok(home) = env::var("HOME") {
-        let trimmed = home.trim();
-        if !trimmed.is_empty() {
-            return PathBuf::from(trimmed)
-                .join(".config")
-                .join("xserial")
-                .join(FONT_SETTINGS_FILE_NAME);
-        }
-    }
-
-    PathBuf::from(FONT_SETTINGS_FILE_NAME)
+    font_settings_path_for_os_and_env(env::consts::OS, |key| env::var(key).ok())
 }
 
 fn load_font_settings_from_path(path: &Path) -> io::Result<UiFontSettings> {
@@ -348,6 +350,165 @@ fn save_font_settings_to_path(settings: &UiFontSettings, path: &Path) -> io::Res
     fs::write(path, json)
 }
 
+fn font_settings_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(FONT_SETTINGS_FILE_NAME);
+            }
+            if let Some(path) = get_env("LOCALAPPDATA").filter(|path| !path.trim().is_empty()) {
+                return PathBuf::from(path)
+                    .join("pipeview")
+                    .join(FONT_SETTINGS_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(FONT_SETTINGS_FILE_NAME);
+            }
+        }
+        _ => {
+            if let Some(path) = get_env("XDG_CONFIG_HOME").filter(|path| !path.trim().is_empty()) {
+                return PathBuf::from(path)
+                    .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("pipeview")
+                    .join(FONT_SETTINGS_FILE_NAME);
+            }
+        }
+    }
+
+    PathBuf::from(FONT_SETTINGS_FILE_NAME)
+}
+
+fn platform_font_directories() -> Vec<PathBuf> {
+    let mut dirs = Vec::new();
+
+    #[cfg(target_os = "windows")]
+    {
+        if let Some(windir) = env::var("WINDIR")
+            .ok()
+            .filter(|path| !path.trim().is_empty())
+        {
+            dirs.push(PathBuf::from(windir).join("Fonts"));
+        } else {
+            dirs.push(PathBuf::from(r"C:\Windows\Fonts"));
+        }
+
+        if let Some(local_app_data) = env::var("LOCALAPPDATA")
+            .ok()
+            .filter(|path| !path.trim().is_empty())
+        {
+            dirs.push(
+                PathBuf::from(local_app_data)
+                    .join("Microsoft")
+                    .join("Windows")
+                    .join("Fonts"),
+            );
+        }
+    }
+
+    #[cfg(target_os = "macos")]
+    {
+        dirs.push(PathBuf::from("/System/Library/Fonts"));
+        dirs.push(PathBuf::from("/Library/Fonts"));
+        if let Some(home) = env::var("HOME").ok().filter(|path| !path.trim().is_empty()) {
+            dirs.push(PathBuf::from(home).join("Library").join("Fonts"));
+        }
+    }
+
+    #[cfg(all(not(target_os = "windows"), not(target_os = "macos")))]
+    {
+        dirs.push(PathBuf::from("/usr/share/fonts"));
+        dirs.push(PathBuf::from("/usr/local/share/fonts"));
+        if let Some(home) = env::var("HOME").ok().filter(|path| !path.trim().is_empty()) {
+            dirs.push(
+                PathBuf::from(&home)
+                    .join(".local")
+                    .join("share")
+                    .join("fonts"),
+            );
+            dirs.push(PathBuf::from(home).join(".fonts"));
+        }
+    }
+
+    dirs
+}
+
+fn font_candidate_from_path(path: &Path) -> Option<FontCandidate> {
+    let extension = path.extension()?.to_str()?.to_ascii_lowercase();
+    if !matches!(extension.as_str(), "ttf" | "ttc" | "otf" | "otc") {
+        return None;
+    }
+
+    let stem = path.file_stem()?.to_str()?.trim();
+    if stem.is_empty() {
+        return None;
+    }
+
+    let (family, style) = split_font_name(stem);
+    let path_string = path.to_string_lossy().into_owned();
+    let id = sanitize_id(&format!("{family}_{style}_{stem}"));
+    let label = if style.is_empty() || style == "Regular" {
+        family.clone()
+    } else {
+        format!("{family} ({style})")
+    };
+
+    Some(FontCandidate {
+        id,
+        label,
+        display_label: font_display_label(&family, &style, &path_string),
+        path: path_string.clone(),
+        likely_cjk: is_likely_cjk(&family, &style, &path_string),
+        search_key: build_search_key(&family, &style, &path_string),
+    })
+}
+
+fn split_font_name(stem: &str) -> (String, String) {
+    let normalized = stem.replace(['_', '-'], " ");
+    let compact = normalized.split_whitespace().collect::<Vec<_>>().join(" ");
+    let lower = compact.to_lowercase();
+
+    for style in [
+        "ExtraBold Italic",
+        "Extra Light Italic",
+        "SemiBold Italic",
+        "Bold Italic",
+        "ExtraBold",
+        "SemiBold",
+        "Medium",
+        "Regular",
+        "Italic",
+        "Bold",
+        "Light",
+        "Thin",
+    ] {
+        let suffix = style.to_lowercase();
+        if let Some(prefix) = lower.strip_suffix(&suffix) {
+            let family = compact[..prefix.trim_end().len()].trim().to_owned();
+            if !family.is_empty() {
+                return (family, style.to_owned());
+            }
+        }
+    }
+
+    (compact, String::from("Regular"))
+}
+
 const fn default_ui_font_size() -> f32 {
     14.0
 }
@@ -397,6 +558,21 @@ fn is_likely_cjk(family: &str, style: &str, path: &str) -> bool {
         "hei",
         "kai",
         "song",
+        "fang",
+        "yahei",
+        "deng",
+        "ming",
+        "simsun",
+        "simhei",
+        "simkai",
+        "simfang",
+        "msyh",
+        "msjh",
+        "meiryo",
+        "msgothic",
+        "ms gothic",
+        "malgun",
+        "gulim",
         "gothic",
         "mincho",
     ]
@@ -415,7 +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")),
@@ -436,4 +612,62 @@ mod tests {
         let _ = fs::remove_file(&path);
         let _ = fs::remove_dir_all(&dir);
     }
+
+    #[test]
+    fn linux_config_path_uses_xdg() {
+        let path = font_settings_path_for_os_and_env("linux", |key| match key {
+            "XDG_CONFIG_HOME" => Some(String::from("/tmp/xdg-config")),
+            _ => None,
+        });
+        assert_eq!(
+            path,
+            PathBuf::from("/tmp/xdg-config")
+                .join("pipeview")
+                .join(FONT_SETTINGS_FILE_NAME)
+        );
+    }
+
+    #[test]
+    fn windows_config_path_uses_appdata() {
+        let path = font_settings_path_for_os_and_env("windows", |key| match key {
+            "APPDATA" => Some(String::from(r"C:\Users\Test\AppData\Roaming")),
+            _ => None,
+        });
+        assert_eq!(
+            path,
+            PathBuf::from(r"C:\Users\Test\AppData\Roaming")
+                .join("pipeview")
+                .join(FONT_SETTINGS_FILE_NAME)
+        );
+    }
+
+    #[test]
+    fn macos_config_path_uses_application_support() {
+        let path = font_settings_path_for_os_and_env("macos", |key| match key {
+            "HOME" => Some(String::from("/Users/tester")),
+            _ => None,
+        });
+        assert_eq!(
+            path,
+            PathBuf::from("/Users/tester")
+                .join("Library")
+                .join("Application Support")
+                .join("pipeview")
+                .join(FONT_SETTINGS_FILE_NAME)
+        );
+    }
+
+    #[test]
+    fn detects_windows_cjk_fonts() {
+        assert!(is_likely_cjk(
+            "Microsoft YaHei UI",
+            "Regular",
+            r"C:\Windows\Fonts\msyh.ttc"
+        ));
+        assert!(is_likely_cjk(
+            "SimSun",
+            "Regular",
+            r"C:\Windows\Fonts\simsun.ttc"
+        ));
+    }
 }

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" }
-xserial-client = { path = "../xserial-client" }
+pipeview-core = { path = "../pipeview-core" }
+pipeview-client = { path = "../pipeview-client" }
 tokio = { workspace = true }
 ratatui = { workspace = true }
 crossterm = { workspace = true }
@@ -19,3 +19,6 @@ tracing-appender = { workspace = true }
 clap = { workspace = true }
 hex = { workspace = true }
 image = { workspace = true }
+mlua = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }

crates/pipeview-tui/src/app_state.rs

@@ -0,0 +1,103 @@
+use std::env;
+use std::fs;
+use std::io;
+use std::path::{Path, PathBuf};
+
+use serde::{Deserialize, Serialize};
+use tracing::warn;
+use pipeview_client::SessionConfig;
+
+const TUI_STATE_FILE_NAME: &str = "tui-state.json";
+
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct PersistedTuiState {
+    #[serde(default)]
+    pub sessions: Vec<SessionConfig>,
+    #[serde(default)]
+    pub active: usize,
+    #[serde(default = "default_true")]
+    pub show_timestamp: bool,
+    #[serde(default = "default_true")]
+    pub show_direction: bool,
+    #[serde(default = "default_true")]
+    pub show_pipeline: bool,
+}
+
+pub fn load_tui_state() -> PersistedTuiState {
+    match load_tui_state_from_path(&tui_state_path()) {
+        Ok(state) => 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(state: &PersistedTuiState) {
+    if let Err(err) = save_tui_state_to_path(state, &tui_state_path()) {
+        warn!(error = %err, "Failed to persist TUI state");
+    }
+}
+
+fn tui_state_path() -> PathBuf {
+    state_path_for_os_and_env(env::consts::OS, |key| env::var(key).ok())
+}
+
+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 +1,146 @@
+use std::time::{Duration, Instant};
+
+use pipeview_client::{DecodedEntry, RingBuffer};
+use pipeview_core::protocol::DecodedData;
+
+#[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 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 fn recent(&self, count: usize) -> Vec<ConsoleLine> {
+        self.lines.drain_recent(count)
+    }
+}
+
+#[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 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 fn recent(&self, count: usize) -> Vec<HexLine> {
+        self.lines.drain_recent(count)
+    }
+}
+
+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 +1,38 @@
+mod app;
+mod app_state;
+mod buffers;
+mod ui;
+
+use std::io;
+
+use crossterm::{
+    execute,
+    terminal::{EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode},
+};
+use ratatui::{Terminal, backend::CrosstermBackend};
+use pipeview_client::SessionManager;
+
+#[tokio::main]
+async fn main() -> io::Result<()> {
+    tracing_subscriber::fmt()
+        .with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
+        .init();
+
+    enable_raw_mode()?;
+    let mut stdout = io::stdout();
+    execute!(stdout, EnterAlternateScreen)?;
+
+    let backend = CrosstermBackend::new(stdout);
+    let mut terminal = Terminal::new(backend)?;
+
+    let manager = SessionManager::new();
+    let rx = manager.subscribe();
+
+    let result = app::run(&mut terminal, app::App::new(manager, rx));
+
+    disable_raw_mode()?;
+    execute!(terminal.backend_mut(), LeaveAlternateScreen)?;
+    terminal.show_cursor()?;
+
+    result
+}

crates/pipeview-tui/src/ui.rs

@@ -0,0 +1,332 @@
+use ratatui::{
+    Frame,
+    layout::{Constraint, Direction, Layout, Rect},
+    style::{Modifier, Style},
+    widgets::{Block, Borders, Clear, List, ListItem, Paragraph, Wrap},
+};
+
+use crate::app::{App, AppMode, ConnectionStatus, DisplayOptions, SendMode, SessionForm, View};
+use crate::buffers::{ConsoleLine, HexLine, LineDirection};
+
+const MAX_RENDER_LINES: usize = 400;
+
+pub fn render(frame: &mut Frame, app: &App) {
+    let root = Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints([Constraint::Length(34), Constraint::Min(20)])
+        .split(frame.area());
+
+    render_sidebar(frame, app, root[0]);
+    render_main(frame, app, root[1]);
+
+    if let AppMode::SessionForm(form) = app.mode() {
+        render_session_form(frame, form);
+    }
+}
+
+fn render_sidebar(frame: &mut Frame, app: &App, area: Rect) {
+    let items: Vec<ListItem> = app
+        .tabs()
+        .iter()
+        .enumerate()
+        .map(|(index, tab)| {
+            let prefix = if index == app.active_index() {
+                "> "
+            } else {
+                "  "
+            };
+            let transport = App::transport_summary(&tab.session_config);
+            ListItem::new(format!(
+                "{prefix}[{}] {}\n   {}",
+                tab.id,
+                tab.status.badge(),
+                transport
+            ))
+        })
+        .collect();
+
+    let sidebar = if items.is_empty() {
+        Paragraph::new("No sessions.\nPress n to create one.")
+            .block(Block::default().borders(Borders::ALL).title("Sessions"))
+            .wrap(Wrap { trim: false })
+    } else {
+        Paragraph::new("").block(Block::default().borders(Borders::ALL).title("Sessions"))
+    };
+
+    frame.render_widget(sidebar, area);
+    if !items.is_empty() {
+        frame.render_widget(
+            List::new(items).block(Block::default().borders(Borders::ALL).title("Sessions")),
+            area,
+        );
+    }
+}
+
+fn render_main(frame: &mut Frame, app: &App, area: Rect) {
+    let sections = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(4),
+            Constraint::Min(8),
+            Constraint::Length(7),
+            Constraint::Length(3),
+        ])
+        .split(area);
+
+    if let Some(tab) = app.active_tab() {
+        render_header(frame, app, sections[0]);
+        render_receive(frame, app, sections[1]);
+        render_send(frame, app, sections[2]);
+        let footer = format!(
+            "{}{}",
+            app.help_text(),
+            app.notice()
+                .map(|notice| format!(" | {notice}"))
+                .unwrap_or_default()
+        );
+        frame.render_widget(
+            Paragraph::new(footer)
+                .block(Block::default().borders(Borders::ALL).title("Help"))
+                .wrap(Wrap { trim: false }),
+            sections[3],
+        );
+
+        if let ConnectionStatus::Error(_) = &tab.status {
+        }
+    } else {
+        frame.render_widget(
+            Paragraph::new(format!(
+                "No active session.\n{}\n{}",
+                app.help_text(),
+                app.notice().unwrap_or("")
+            ))
+            .block(Block::default().borders(Borders::ALL).title("pipeview-tui"))
+            .wrap(Wrap { trim: false }),
+            area,
+        );
+    }
+}
+
+fn render_header(frame: &mut Frame, app: &App, area: Rect) {
+    let tab = app.active_tab().expect("active tab");
+    let display = app.display();
+    let status_line = match &tab.status {
+        ConnectionStatus::Error(message) => {
+            format!("Session {} [{}]  {}", tab.id, tab.status.badge(), message)
+        }
+        _ => format!("Session {} [{}]", tab.id, tab.status.badge()),
+    };
+    let line2 = format!(
+        "{}  |  View: {}  |  Send: {}  |  AutoReconnect: {}  |  AppendNewline: {}",
+        App::transport_summary(&tab.session_config),
+        match tab.view {
+            View::Text => "Text",
+            View::Hex => "Hex",
+        },
+        match tab.send_mode {
+            SendMode::Text => "Text",
+            SendMode::Hex => "Hex",
+        },
+        tab.auto_reconnect,
+        tab.append_newline
+    );
+    let line3 = format!(
+        "Display: ts={} dir={} pipe={}  |  Text lines={} Hex lines={}",
+        display.show_timestamp,
+        display.show_direction,
+        display.show_pipeline,
+        tab.console.len(),
+        tab.hex.len()
+    );
+    frame.render_widget(
+        Paragraph::new(format!("{status_line}\n{line2}\n{line3}"))
+            .block(Block::default().borders(Borders::ALL).title("Session"))
+            .wrap(Wrap { trim: false }),
+        area,
+    );
+}
+
+fn render_receive(frame: &mut Frame, app: &App, area: Rect) {
+    let tab = app.active_tab().expect("active tab");
+    let display = app.display();
+    let title = match tab.view {
+        View::Text => "Receive Text",
+        View::Hex => "Receive Hex",
+    };
+
+    let lines: Vec<String> = match tab.view {
+        View::Text => tab
+            .console
+            .recent(MAX_RENDER_LINES)
+            .into_iter()
+            .map(|line| format_console_line(&line, display))
+            .collect(),
+        View::Hex => tab
+            .hex
+            .recent(MAX_RENDER_LINES)
+            .into_iter()
+            .map(|line| format_hex_line(&line, display))
+            .collect(),
+    };
+
+    let body = if lines.is_empty() {
+        String::from("no data")
+    } else {
+        lines.join("\n")
+    };
+
+    frame.render_widget(
+        Paragraph::new(body)
+            .block(Block::default().borders(Borders::ALL).title(title))
+            .wrap(Wrap { trim: false }),
+        area,
+    );
+}
+
+fn render_send(frame: &mut Frame, app: &App, area: Rect) {
+    let tab = app.active_tab().expect("active tab");
+    let editing = matches!(app.mode(), AppMode::SendInput);
+    let title = if editing { "Send [editing]" } else { "Send" };
+    let status = tab.send_status.as_deref().unwrap_or("idle");
+    let hint = match tab.send_mode {
+        SendMode::Text => "Press i to edit input, Enter to send while editing",
+        SendMode::Hex => "Hex bytes, e.g. 48 65 6C 6C 6F",
+    };
+    let body = format!(
+        "Mode: {}  |  Append newline: {}\nStatus: {}\nHint: {}\n\n{}",
+        match tab.send_mode {
+            SendMode::Text => "Text",
+            SendMode::Hex => "Hex",
+        },
+        tab.append_newline,
+        status,
+        hint,
+        if tab.send_input.is_empty() {
+            String::from("<empty>")
+        } else {
+            tab.send_input.clone()
+        }
+    );
+
+    frame.render_widget(
+        Paragraph::new(body)
+            .block(Block::default().borders(Borders::ALL).title(title))
+            .wrap(Wrap { trim: false }),
+        area,
+    );
+}
+
+fn render_session_form(frame: &mut Frame, form: &SessionForm) {
+    let rows = form.rows();
+    let footer_lines = form.footer_lines();
+    let height = (rows.len() + footer_lines.len() + 4) as u16;
+    let area = centered_rect(82, height, frame.area());
+    let inner = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Min(1),
+            Constraint::Length(footer_lines.len() as u16),
+        ])
+        .margin(1)
+        .split(area);
+
+    let items: Vec<ListItem> = rows
+        .into_iter()
+        .enumerate()
+        .map(|(idx, row)| ListItem::new(row).style(focus_style(idx == form.focused_field)))
+        .collect();
+
+    frame.render_widget(Clear, area);
+    frame.render_widget(
+        Block::default().borders(Borders::ALL).title(form.title()),
+        area,
+    );
+    frame.render_widget(List::new(items), inner[0]);
+    frame.render_widget(Paragraph::new(footer_lines.join("\n")), inner[1]);
+}
+
+fn format_console_line(line: &ConsoleLine, display: DisplayOptions) -> String {
+    let mut prefix = Vec::new();
+    if display.show_timestamp {
+        prefix.push(format!("[{}]", format_elapsed(line.elapsed)));
+    }
+    if display.show_direction {
+        prefix.push(format!(
+            "[{}]",
+            match line.direction {
+                LineDirection::In => "IN",
+                LineDirection::Out => "OUT",
+            }
+        ));
+    }
+    if display.show_pipeline {
+        prefix.push(format!("[{}]", line.pipeline));
+    }
+    if prefix.is_empty() {
+        line.text.clone()
+    } else {
+        format!("{} {}", prefix.join(" "), line.text)
+    }
+}
+
+fn format_hex_line(line: &HexLine, display: DisplayOptions) -> String {
+    let mut prefix = Vec::new();
+    if display.show_timestamp {
+        prefix.push(format!("[{}]", format_elapsed(line.elapsed)));
+    }
+    if display.show_direction {
+        prefix.push(format!(
+            "[{}]",
+            match line.direction {
+                LineDirection::In => "IN",
+                LineDirection::Out => "OUT",
+            }
+        ));
+    }
+    if display.show_pipeline {
+        prefix.push(format!("[{}]", line.pipeline));
+    }
+    let base = format!("{}  |{}|", line.hex, line.ascii);
+    if prefix.is_empty() {
+        base
+    } else {
+        format!("{} {}", prefix.join(" "), base)
+    }
+}
+
+fn format_elapsed(elapsed: std::time::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 focus_style(focused: bool) -> Style {
+    if focused {
+        Style::default().add_modifier(Modifier::REVERSED | Modifier::BOLD)
+    } else {
+        Style::default()
+    }
+}
+
+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]
+}

crates/xserial-gui/src/app.rs

@@ -1,804 +0,0 @@
-use std::sync::mpsc;
-use std::time::Duration;
-
-use crate::buffers::{HexBuffer, PlotBuffer, TextBuffer};
-use crate::panels::{config, console, hex_view, plot_view, sidebar};
-use crate::ui_fonts::{self, FontCandidate, FontChoice, UiFontSettings};
-use egui::{Color32, Layout, Panel, Pos2, Rect, TextEdit, UiBuilder};
-use xserial_client::SessionManager;
-use xserial_client::config::SessionConfig;
-use xserial_client::session::SessionEvent;
-use xserial_core::protocol::DecodedData;
-
-#[derive(Clone)]
-pub enum ConnectionStatus {
-    Connected,
-    Disconnected,
-    Connecting,
-    Error(String),
-}
-
-impl ConnectionStatus {
-    fn badge(&self) -> (&'static str, &'static str) {
-        match self {
-            Self::Connected => ("[connected]", "Connected"),
-            Self::Disconnected => ("[disconnected]", "Disconnected"),
-            Self::Connecting => ("[connecting]", "Connecting"),
-            Self::Error(_) => ("[error]", "Error"),
-        }
-    }
-}
-
-#[derive(Clone, Copy, PartialEq)]
-pub enum View {
-    Text,
-    Hex,
-    Plot,
-}
-
-#[derive(Clone, Copy, PartialEq)]
-pub enum SendMode {
-    Text,
-    Hex,
-}
-
-#[derive(Clone, Copy)]
-pub struct DisplayOptions {
-    pub show_timestamp: bool,
-    pub show_direction: bool,
-    pub show_pipeline: bool,
-}
-
-pub struct SessionTab {
-    pub id: u64,
-    pub session_config: SessionConfig,
-    pub status: ConnectionStatus,
-    pub console: TextBuffer,
-    pub hex: HexBuffer,
-    pub plot: PlotBuffer,
-    pub plot_view: plot_view::PlotViewState,
-    pub view: View,
-    pub auto_reconnect: bool,
-    pub send_input: String,
-    pub send_mode: SendMode,
-    pub append_newline: bool,
-    pub send_status: Option<String>,
-}
-
-pub struct XserialApp {
-    manager: SessionManager,
-    tabs: Vec<SessionTab>,
-    active: usize,
-    display: DisplayOptions,
-    font_settings_open: bool,
-    font_candidates: Vec<FontCandidate>,
-    font_settings: UiFontSettings,
-    primary_font_search: String,
-    fallback_font_search: String,
-    primary_filtered_fonts: Vec<usize>,
-    fallback_filtered_fonts: Vec<usize>,
-    primary_filter_cache_key: String,
-    fallback_filter_cache_key: String,
-    config_open: bool,
-    config_target: Option<u64>,
-    config_form: config::ConfigForm,
-    event_rx: mpsc::Receiver<SessionEvent>,
-    pending: Vec<SessionEvent>,
-}
-
-impl XserialApp {
-    pub fn new(
-        manager: SessionManager,
-        mut rx: tokio::sync::broadcast::Receiver<SessionEvent>,
-        ctx: egui::Context,
-    ) -> Self {
-        let (event_tx, event_rx) = mpsc::channel();
-        let repaint_ctx = ctx.clone();
-        tokio::spawn(async move {
-            loop {
-                match rx.recv().await {
-                    Ok(event) => {
-                        if event_tx.send(event).is_err() {
-                            break;
-                        }
-                        repaint_ctx.request_repaint();
-                    }
-                    Err(tokio::sync::broadcast::error::RecvError::Lagged(_)) => continue,
-                    Err(tokio::sync::broadcast::error::RecvError::Closed) => break,
-                }
-            }
-        });
-
-        let font_candidates = ui_fonts::discover_font_candidates();
-        let font_settings = ui_fonts::load_font_settings();
-        ui_fonts::apply_font_settings(&ctx, &font_settings, &font_candidates);
-
-        Self {
-            manager,
-            tabs: Vec::new(),
-            active: 0,
-            display: DisplayOptions {
-                show_timestamp: true,
-                show_direction: true,
-                show_pipeline: true,
-            },
-            font_settings_open: false,
-            font_candidates,
-            font_settings,
-            primary_font_search: String::new(),
-            fallback_font_search: String::new(),
-            primary_filtered_fonts: Vec::new(),
-            fallback_filtered_fonts: Vec::new(),
-            primary_filter_cache_key: String::from("\0"),
-            fallback_filter_cache_key: String::from("\0"),
-            config_open: false,
-            config_target: None,
-            config_form: config::ConfigForm::default(),
-            event_rx,
-            pending: Vec::new(),
-        }
-    }
-
-    fn open_create_config(&mut self) {
-        self.config_target = None;
-        self.config_form = config::ConfigForm::default();
-        self.config_open = true;
-    }
-
-    fn open_edit_config(&mut self, id: u64) {
-        if let Some(tab) = self.tabs.iter().find(|tab| tab.id == id) {
-            self.config_target = Some(id);
-            self.config_form = config::ConfigForm::from_session_config(&tab.session_config);
-            self.config_open = true;
-        }
-    }
-
-    fn apply_session_config(&mut self, id: u64, session_config: SessionConfig) {
-        let handle = self.manager.get(id);
-        if let Some(tab) = self.tabs.iter_mut().find(|tab| tab.id == id) {
-            let history_limit = session_config.history_limit;
-            tab.session_config = session_config.clone();
-            tab.auto_reconnect = session_config.auto_reconnect;
-            tab.console.set_limit(history_limit);
-            tab.hex.set_limit(history_limit);
-            tab.plot.set_limit(history_limit);
-            tab.status = ConnectionStatus::Connecting;
-            tab.send_status = Some(String::from("Session reconfigured"));
-        }
-
-        if let Some(handle) = handle {
-            tokio::spawn(async move {
-                let _ = handle.reconfigure(session_config).await;
-            });
-        } else if let Some(tab) = self.tabs.iter_mut().find(|tab| tab.id == id) {
-            tab.status = ConnectionStatus::Error(String::from("session not found"));
-        }
-    }
-
-    fn drain_events(&mut self) {
-        while let Ok(event) = self.event_rx.try_recv() {
-            self.pending.push(event);
-        }
-
-        for event in self.pending.drain(..) {
-            match event {
-                SessionEvent::Connected(id) => {
-                    if let Some(tab) = self.tabs.iter_mut().find(|tab| tab.id == id) {
-                        tab.status = ConnectionStatus::Connected;
-                    }
-                }
-                SessionEvent::Disconnected(id) | SessionEvent::Closed(id) => {
-                    if let Some(tab) = self.tabs.iter_mut().find(|tab| tab.id == id) {
-                        tab.status = ConnectionStatus::Disconnected;
-                    }
-                }
-                SessionEvent::Error(id, message) => {
-                    if let Some(tab) = self.tabs.iter_mut().find(|tab| tab.id == id) {
-                        tab.status = ConnectionStatus::Error(message);
-                    }
-                }
-                SessionEvent::Data(id, entry) => {
-                    if let Some(tab) = self.tabs.iter_mut().find(|tab| tab.id == id) {
-                        match &entry.data {
-                            DecodedData::Text(_) => tab.console.push(&entry),
-                            DecodedData::Hex(_) => tab.hex.push(&entry),
-                            DecodedData::Plot(_) => tab.plot.push(&entry),
-                            DecodedData::Binary(_) => {}
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    fn wants_live_plot_repaint(&self) -> bool {
-        self.tabs
-            .get(self.active)
-            .map(|tab| {
-                matches!(tab.view, View::Plot) && matches!(tab.status, ConnectionStatus::Connected)
-            })
-            .unwrap_or(false)
-    }
-
-    fn render_config_window(&mut self, ctx: &egui::Context) {
-        if !self.config_open {
-            return;
-        }
-
-        let mut open = self.config_open;
-        let title = if self.config_target.is_some() {
-            "Edit Session Config"
-        } else {
-            "Session Config"
-        };
-        let submit_label = if self.config_target.is_some() {
-            "Save Session Config"
-        } else {
-            "Create Session"
-        };
-        let mut submitted = None;
-        egui::Window::new(title).open(&mut open).show(ctx, |ui| {
-            submitted = config::render(ui, &mut self.config_form, submit_label);
-        });
-
-        if let Some(session_config) = submitted {
-            if let Some(id) = self.config_target {
-                self.apply_session_config(id, session_config);
-            } else {
-                let history_limit = session_config.history_limit;
-                let auto_reconnect = session_config.auto_reconnect;
-                let handle = self.manager.create(session_config.clone());
-                self.tabs.push(SessionTab {
-                    id: handle.id(),
-                    session_config,
-                    status: ConnectionStatus::Connecting,
-                    console: TextBuffer::new(history_limit),
-                    hex: HexBuffer::new(history_limit),
-                    plot: PlotBuffer::new(history_limit),
-                    plot_view: plot_view::PlotViewState::default(),
-                    view: View::Text,
-                    auto_reconnect,
-                    send_input: String::new(),
-                    send_mode: SendMode::Text,
-                    append_newline: true,
-                    send_status: None,
-                });
-                self.active = self.tabs.len() - 1;
-            }
-            open = false;
-        }
-        if !open {
-            self.config_target = None;
-        }
-        self.config_open = open;
-    }
-
-    fn render_sidebar(&mut self, ui: &mut egui::Ui) {
-        let mut on_new = false;
-        let mut on_delete = None;
-
-        Panel::left("sidebar")
-            .resizable(false)
-            .show_inside(ui, |ui| {
-                let sessions: Vec<_> = self
-                    .tabs
-                    .iter()
-                    .map(|tab| (tab.id, tab.status.clone()))
-                    .collect();
-                sidebar::render(ui, &sessions, &mut self.active, &mut on_new, &mut on_delete);
-            });
-
-        if on_new {
-            self.open_create_config();
-        }
-
-        if let Some(index) = on_delete {
-            if let Some(tab) = self.tabs.get(index) {
-                self.manager.remove(tab.id);
-            }
-            self.tabs.remove(index);
-            if self.active >= self.tabs.len() && !self.tabs.is_empty() {
-                self.active = self.tabs.len() - 1;
-            }
-        }
-    }
-
-    fn render_main_panel(&mut self, ui: &mut egui::Ui) {
-        egui::CentralPanel::default().show_inside(ui, |ui| {
-            if self.tabs.is_empty() {
-                ui.heading("No sessions.");
-                return;
-            }
-
-            if self.active >= self.tabs.len() {
-                self.active = self.tabs.len() - 1;
-            }
-
-            let manager = self.manager.clone();
-            let display = &mut self.display;
-            let mut edit_session = None;
-
-            {
-                let tab = &mut self.tabs[self.active];
-                let (badge, status_text) = tab.status.badge();
-
-                ui.horizontal(|ui| {
-                    ui.heading(format!("Session {}", tab.id));
-                    ui.label(badge);
-                    ui.separator();
-                    ui.label(status_text);
-                    ui.separator();
-                    if ui
-                        .selectable_label(tab.view == View::Text, "Text")
-                        .clicked()
-                    {
-                        tab.view = View::Text;
-                    }
-                    if ui.selectable_label(tab.view == View::Hex, "Hex").clicked() {
-                        tab.view = View::Hex;
-                    }
-                    if ui
-                        .selectable_label(tab.view == View::Plot, "Plot")
-                        .clicked()
-                    {
-                        tab.view = View::Plot;
-                    }
-                });
-
-                if render_session_controls(ui, &manager, tab) {
-                    edit_session = Some(tab.id);
-                }
-
-                ui.horizontal_wrapped(|ui| {
-                    ui.label("Show:");
-                    ui.checkbox(&mut display.show_timestamp, "Timestamp");
-                    ui.checkbox(&mut display.show_direction, "Direction");
-                    ui.checkbox(&mut display.show_pipeline, "Pipe");
-                });
-
-                if let ConnectionStatus::Error(message) = &tab.status {
-                    ui.label(egui::RichText::new(message).color(Color32::RED));
-                }
-
-                let full = ui.available_rect_before_wrap();
-                let send_height = 240.0;
-                let separator = 8.0;
-                let receive_height = (full.height() - send_height - separator).max(0.0);
-                let receive_rect = Rect::from_min_max(
-                    full.min,
-                    Pos2::new(full.max.x, full.min.y + receive_height),
-                );
-                let send_rect =
-                    Rect::from_min_max(Pos2::new(full.min.x, full.max.y - send_height), full.max);
-
-                ui.scope_builder(
-                    UiBuilder::new()
-                        .max_rect(receive_rect)
-                        .layout(Layout::top_down(egui::Align::Min).with_cross_justify(true)),
-                    |ui| match tab.view {
-                        View::Text => console::render(ui, &tab.console, *display),
-                        View::Hex => hex_view::render(ui, &tab.hex, *display),
-                        View::Plot => plot_view::render(ui, &tab.plot, tab.id, &mut tab.plot_view),
-                    },
-                );
-
-                ui.scope_builder(
-                    UiBuilder::new()
-                        .max_rect(send_rect)
-                        .layout(Layout::top_down(egui::Align::Min).with_cross_justify(true)),
-                    |ui| render_send_panel(ui, &manager, tab),
-                );
-            }
-
-            if let Some(id) = edit_session {
-                self.open_edit_config(id);
-            }
-        });
-    }
-
-    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.separator();
-                // ui.label(format!(
-                //     "Fonts: {} + {}  {:.1} pt",
-                //     ui_fonts::font_choice_label(
-                //         &self.font_settings.primary_choice,
-                //         &self.font_candidates
-                //     ),
-                //     ui_fonts::font_choice_label(
-                //         &self.font_settings.fallback_choice,
-                //         &self.font_candidates
-                //     ),
-                //     self.font_settings.ui_font_size
-                // ));
-                if ui.button("UI Settings").clicked() {
-                    self.font_settings_open = true;
-                }
-            });
-        });
-    }
-
-    fn render_font_settings_window(&mut self, ctx: &egui::Context) {
-        if !self.font_settings_open {
-            return;
-        }
-
-        let mut open = self.font_settings_open;
-        let mut changed = false;
-        egui::Window::new("UI Settings")
-            .open(&mut open)
-            .default_width(520.0)
-            .resizable(true)
-            .show(ctx, |ui| {
-                ui.heading("Fonts");
-                ui.horizontal(|ui| {
-                    ui.label("Primary:");
-                    ui.monospace(ui_fonts::font_choice_label(
-                        &self.font_settings.primary_choice,
-                        &self.font_candidates,
-                    ));
-                    ui.label("Fallback:");
-                    ui.monospace(ui_fonts::font_choice_label(
-                        &self.font_settings.fallback_choice,
-                        &self.font_candidates,
-                    ));
-                    if ui.button("Refresh").clicked() {
-                        self.font_candidates = ui_fonts::discover_font_candidates();
-                        self.invalidate_font_filters();
-                    }
-                });
-                ui.small("Primary font is tried first. Fallback font is used when the primary font lacks a glyph.");
-                ui.add_space(6.0);
-                render_font_selector(
-                    ui,
-                    "Primary font",
-                    "primary_font_choice",
-                    &mut self.font_settings.primary_choice,
-                    &mut self.primary_font_search,
-                    &self.font_candidates,
-                    &mut self.primary_filtered_fonts,
-                    &mut self.primary_filter_cache_key,
-                    true,
-                    true,
-                    180.0,
-                    &mut changed,
-                );
-                ui.separator();
-                render_font_selector(
-                    ui,
-                    "Fallback font",
-                    "fallback_font_choice",
-                    &mut self.font_settings.fallback_choice,
-                    &mut self.fallback_font_search,
-                    &self.font_candidates,
-                    &mut self.fallback_filtered_fonts,
-                    &mut self.fallback_filter_cache_key,
-                    true,
-                    true,
-                    140.0,
-                    &mut changed,
-                );
-                ui.separator();
-                ui.heading("Sizes");
-                ui.label("UI font size");
-                changed |= ui
-                    .add(
-                        egui::Slider::new(&mut self.font_settings.ui_font_size, 10.0..=28.0)
-                            .suffix(" pt"),
-                    )
-                    .changed();
-                ui.label("Monospace font size");
-                changed |= ui
-                    .add(
-                        egui::Slider::new(
-                            &mut self.font_settings.monospace_font_size,
-                            10.0..=28.0,
-                        )
-                        .suffix(" pt"),
-                    )
-                    .changed();
-                ui.label("Heading size");
-                changed |= ui
-                    .add(
-                        egui::Slider::new(&mut self.font_settings.heading_font_size, 14.0..=40.0)
-                            .suffix(" pt"),
-                    )
-                    .changed();
-                ui.separator();
-                ui.heading("Preview");
-                ui.label("The quick brown fox jumps over the lazy dog.");
-                ui.label("中文预览：串口、网络、绘图、十六进制、会话管理。");
-                ui.monospace("Monospace preview: 0123456789 ABCDEF deadbeef");
-            });
-
-        if changed {
-            ui_fonts::apply_font_settings(ctx, &self.font_settings, &self.font_candidates);
-            ui_fonts::save_font_settings(&self.font_settings);
-        }
-        self.font_settings_open = open;
-    }
-
-    fn invalidate_font_filters(&mut self) {
-        self.primary_filtered_fonts.clear();
-        self.fallback_filtered_fonts.clear();
-        self.primary_filter_cache_key = String::from("\0");
-        self.fallback_filter_cache_key = String::from("\0");
-    }
-}
-
-fn render_font_selector(
-    ui: &mut egui::Ui,
-    title: &str,
-    id_prefix: &str,
-    choice: &mut FontChoice,
-    search: &mut String,
-    candidates: &[FontCandidate],
-    filtered: &mut Vec<usize>,
-    cache_key: &mut String,
-    allow_auto: bool,
-    allow_default: bool,
-    max_height: f32,
-    changed: &mut bool,
-) {
-    ui.label(title);
-    ui.horizontal(|ui| {
-        ui.label("Search:");
-        ui.text_edit_singleline(search);
-    });
-    ui.horizontal_wrapped(|ui| {
-        if allow_auto {
-            *changed |= ui
-                .selectable_value(choice, FontChoice::Auto, "Auto")
-                .changed();
-        }
-        if allow_default {
-            *changed |= ui
-                .selectable_value(choice, FontChoice::Default, "Default")
-                .changed();
-        }
-    });
-    ui.add_space(4.0);
-    refresh_font_filter(search, candidates, filtered, cache_key);
-    ui.small(format!("{} fonts", filtered.len()));
-    let row_height = ui.spacing().interact_size.y;
-    egui::ScrollArea::vertical()
-        .id_salt(format!("{id_prefix}_scroll"))
-        .max_height(max_height)
-        .auto_shrink([false, false])
-        .show_rows(ui, row_height, filtered.len(), |ui, row_range| {
-            for row in row_range {
-                if let Some(candidate) = filtered.get(row).and_then(|index| candidates.get(*index)) {
-                    let response = ui.selectable_value(
-                        choice,
-                        FontChoice::System(candidate.id.clone()),
-                        candidate.display_label.as_str(),
-                    );
-                    *changed |= response.changed();
-                    response.on_hover_text(&candidate.path);
-                }
-            }
-        });
-}
-
-fn refresh_font_filter(
-    search: &str,
-    candidates: &[FontCandidate],
-    filtered: &mut Vec<usize>,
-    cache_key: &mut String,
-) {
-    let needle = search.trim().to_lowercase();
-    if *cache_key == needle {
-        return;
-    }
-
-    filtered.clear();
-    if needle.is_empty() {
-        filtered.extend(0..candidates.len());
-    } else {
-        filtered.extend(
-            candidates
-                .iter()
-                .enumerate()
-                .filter(|(_, candidate)| candidate.search_key.contains(&needle))
-                .map(|(index, _)| index),
-        );
-    }
-    *cache_key = needle;
-}
-
-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) {
-        self.drain_events();
-        if self.wants_live_plot_repaint() {
-            ui.ctx().request_repaint_after(Duration::from_millis(16));
-        }
-        self.render_top_bar(ui);
-        self.render_font_settings_window(ui.ctx());
-        self.render_config_window(ui.ctx());
-        self.render_sidebar(ui);
-        self.render_main_panel(ui);
-    }
-}
-
-fn render_session_controls(
-    ui: &mut egui::Ui,
-    manager: &SessionManager,
-    tab: &mut SessionTab,
-) -> bool {
-    let mut configure_clicked = false;
-    ui.horizontal_wrapped(|ui| {
-        if ui.button("Connect").clicked() {
-            if let Some(handle) = manager.get(tab.id) {
-                tab.status = ConnectionStatus::Connecting;
-                tokio::spawn(async move {
-                    let _ = handle.connect().await;
-                });
-            } else {
-                tab.status = ConnectionStatus::Error(String::from("session not found"));
-            }
-        }
-
-        if ui.button("Disconnect").clicked() {
-            if let Some(handle) = manager.get(tab.id) {
-                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;
-                });
-            } else {
-                tab.status = ConnectionStatus::Error(String::from("session not found"));
-            }
-        }
-
-        if ui.button("Configure").clicked() {
-            configure_clicked = true;
-        }
-
-        if ui.button("Clear").clicked() {
-            tab.console.clear();
-            tab.hex.clear();
-            tab.plot.clear();
-            tab.send_status = Some(String::from("Cleared"));
-        }
-
-        let response = ui.checkbox(&mut tab.auto_reconnect, "Auto reconnect");
-        if response.changed() {
-            if let Some(handle) = manager.get(tab.id) {
-                let enabled = tab.auto_reconnect;
-                tokio::spawn(async move {
-                    let _ = handle.set_auto_reconnect(enabled).await;
-                });
-            } else {
-                tab.status = ConnectionStatus::Error(String::from("session not found"));
-            }
-        }
-    });
-    configure_clicked
-}
-
-fn render_send_panel(ui: &mut egui::Ui, manager: &SessionManager, tab: &mut SessionTab) {
-    ui.set_width(ui.available_width());
-    ui.heading("Send");
-    ui.horizontal(|ui| {
-        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);
-
-    let hint = match tab.send_mode {
-        SendMode::Text => "Enter text to send",
-        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)
-            .hint_text(hint),
-    );
-
-    let wants_submit = response.has_focus()
-        && ui.input(|input| input.key_pressed(egui::Key::Enter) && input.modifiers.command_only());
-
-    let mut send_clicked = false;
-    ui.horizontal(|ui| {
-        send_clicked = ui.button("Send").clicked();
-        if let Some(status) = &tab.send_status {
-            ui.label(
-                egui::RichText::new(status).color(if status.starts_with("Send failed") {
-                    Color32::RED
-                } else {
-                    Color32::GRAY
-                }),
-            );
-        }
-    });
-
-    if !(send_clicked || wants_submit) {
-        return;
-    }
-
-    match build_payload(tab) {
-        Ok(Some(payload)) => {
-            if let Some(handle) = manager.get(tab.id) {
-                match tab.send_mode {
-                    SendMode::Text => {
-                        let text = if tab.append_newline {
-                            tab.send_input.trim_end_matches('\n').to_string()
-                        } else {
-                            tab.send_input.clone()
-                        };
-                        if !text.is_empty() {
-                            tab.console.push_outbound(text);
-                        }
-                    }
-                    SendMode::Hex => {
-                        let hex = tab
-                            .send_input
-                            .split_whitespace()
-                            .collect::<Vec<_>>()
-                            .join(" ");
-                        if !hex.is_empty() {
-                            tab.hex.push_outbound(hex);
-                        }
-                    }
-                }
-                tokio::spawn(async move {
-                    let _ = handle.send(payload).await;
-                });
-                tab.send_input.clear();
-                tab.send_status = Some(String::from("Sent"));
-            } else {
-                tab.send_status = Some(String::from("Send failed: session not found"));
-            }
-        }
-        Ok(None) => {
-            tab.send_status = Some(String::from("Nothing to send"));
-        }
-        Err(message) => {
-            tab.send_status = Some(format!("Send failed: {message}"));
-        }
-    }
-}
-
-fn build_payload(tab: &SessionTab) -> Result<Option<Vec<u8>>, String> {
-    let trimmed = tab.send_input.trim();
-    if trimmed.is_empty() {
-        return Ok(None);
-    }
-
-    match tab.send_mode {
-        SendMode::Text => {
-            let mut text = tab.send_input.clone();
-            if tab.append_newline && !text.ends_with('\n') {
-                text.push('\n');
-            }
-            Ok(Some(text.into_bytes()))
-        }
-        SendMode::Hex => {
-            let compact: String = trimmed
-                .chars()
-                .filter(|ch| !ch.is_ascii_whitespace())
-                .collect();
-            hex::decode(compact)
-                .map(Some)
-                .map_err(|err| format!("invalid hex input ({err})"))
-        }
-    }
-}

crates/xserial-gui/src/main.rs

@@ -1,24 +0,0 @@
-mod app;
-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/config.rs

@@ -1,614 +0,0 @@
-use egui::{ComboBox, DragValue, ScrollArea, TextEdit, Ui};
-use xserial_client::config::{DecoderConfig, FramerConfig, PipelineConfig, SessionConfig};
-use xserial_core::protocol::plot::PlotFormat;
-use xserial_core::protocol::text::TextEncoding;
-use xserial_core::transport::TransportConfig;
-use xserial_core::transport::serial::{
-    SerialDataBits, SerialFlowControl, SerialParity, SerialStopBits,
-};
-
-// ── 表单数据结构（简化版，方便 UI 渲染）────────────────────────────
-
-#[derive(Clone)]
-pub struct ConfigForm {
-    pub transport: TransportChoice,
-    pub port: String,
-    pub baud: u32,
-    pub serial_data_bits: SerialDataBits,
-    pub serial_parity: SerialParity,
-    pub serial_stop_bits: SerialStopBits,
-    pub serial_flow_control: SerialFlowControl,
-    pub addr: String,
-    pub udp_bind: String,
-    pub udp_remote: String,
-    pub pipelines: Vec<PipelineForm>,
-    pub history: usize,
-    pub auto_reconnect: bool,
-}
-
-#[derive(Clone)]
-pub struct PipelineForm {
-    pub name: String,
-    pub framer: FramerChoice,
-    pub decoder: DecoderChoice,
-    pub text_encoding: TextEncoding,
-    pub plot_channels: usize,
-    pub plot_format: PlotFormat,
-}
-
-#[derive(Clone, PartialEq)]
-pub enum TransportChoice {
-    Serial,
-    Tcp,
-    Udp,
-}
-
-#[derive(Clone, PartialEq)]
-pub enum FramerChoice {
-    Line,
-    Fixed(usize),
-    MixedTextPlot,
-}
-
-#[derive(Clone, PartialEq)]
-pub enum DecoderChoice {
-    Text,
-    Hex,
-    Plot,
-    MixedTextPlot,
-}
-
-impl Default for ConfigForm {
-    fn default() -> Self {
-        Self {
-            transport: TransportChoice::Tcp,
-            port: "/dev/ttyUSB0".into(),
-            baud: 115200,
-            serial_data_bits: SerialDataBits::Eight,
-            serial_parity: SerialParity::None,
-            serial_stop_bits: SerialStopBits::One,
-            serial_flow_control: SerialFlowControl::None,
-            addr: "127.0.0.1:8080".into(),
-            udp_bind: "0.0.0.0:9000".into(),
-            udp_remote: String::new(),
-            pipelines: vec![PipelineForm {
-                name: "text".into(),
-                framer: FramerChoice::Line,
-                decoder: DecoderChoice::Text,
-                text_encoding: TextEncoding::Utf8,
-                plot_channels: 1,
-                plot_format: PlotFormat::Interleaved,
-            }],
-            history: 10000,
-            auto_reconnect: false,
-        }
-    }
-}
-
-impl ConfigForm {
-    pub fn from_session_config(config: &SessionConfig) -> Self {
-        Self {
-            transport: match &config.transport {
-                TransportConfig::Serial { .. } => TransportChoice::Serial,
-                TransportConfig::Tcp { .. } => TransportChoice::Tcp,
-                TransportConfig::Udp { .. } => TransportChoice::Udp,
-            },
-            port: match &config.transport {
-                TransportConfig::Serial { port, .. } => port.clone(),
-                _ => String::from("/dev/ttyUSB0"),
-            },
-            baud: match &config.transport {
-                TransportConfig::Serial { baud_rate, .. } => *baud_rate,
-                _ => 115200,
-            },
-            serial_data_bits: match &config.transport {
-                TransportConfig::Serial { data_bits, .. } => *data_bits,
-                _ => SerialDataBits::Eight,
-            },
-            serial_parity: match &config.transport {
-                TransportConfig::Serial { parity, .. } => *parity,
-                _ => SerialParity::None,
-            },
-            serial_stop_bits: match &config.transport {
-                TransportConfig::Serial { stop_bits, .. } => *stop_bits,
-                _ => SerialStopBits::One,
-            },
-            serial_flow_control: match &config.transport {
-                TransportConfig::Serial { flow_control, .. } => *flow_control,
-                _ => SerialFlowControl::None,
-            },
-            addr: match &config.transport {
-                TransportConfig::Tcp { addr } => addr.clone(),
-                _ => String::from("127.0.0.1:8080"),
-            },
-            udp_bind: match &config.transport {
-                TransportConfig::Udp { bind_addr, .. } => bind_addr.clone(),
-                _ => String::from("0.0.0.0:9000"),
-            },
-            udp_remote: match &config.transport {
-                TransportConfig::Udp { remote_addr, .. } => remote_addr.clone().unwrap_or_default(),
-                _ => String::new(),
-            },
-            pipelines: config
-                .pipelines
-                .iter()
-                .map(|pipeline| {
-                    let framer = match &pipeline.framer {
-                        FramerConfig::Line { .. } => FramerChoice::Line,
-                        FramerConfig::Fixed { frame_len } => FramerChoice::Fixed(*frame_len),
-                        FramerConfig::MixedTextPlot { .. } => FramerChoice::MixedTextPlot,
-                        FramerConfig::Length { .. } | FramerConfig::Cobs { .. } => {
-                            FramerChoice::Line
-                        }
-                    };
-                    let decoder = match &pipeline.decoder {
-                        DecoderConfig::Text { .. } => DecoderChoice::Text,
-                        DecoderConfig::Hex { .. } => DecoderChoice::Hex,
-                        DecoderConfig::Plot { .. } => DecoderChoice::Plot,
-                        DecoderConfig::MixedTextPlot { .. } => DecoderChoice::MixedTextPlot,
-                    };
-                    let plot_channels = match &pipeline.decoder {
-                        DecoderConfig::Plot { channels, .. } => *channels,
-                        _ => 1,
-                    };
-                    let text_encoding = match &pipeline.decoder {
-                        DecoderConfig::Text { encoding } => *encoding,
-                        DecoderConfig::MixedTextPlot { encoding } => *encoding,
-                        _ => TextEncoding::Utf8,
-                    };
-                    let plot_format = match &pipeline.decoder {
-                        DecoderConfig::Plot { format, .. } => *format,
-                        _ => PlotFormat::Interleaved,
-                    };
-                    PipelineForm {
-                        name: pipeline.name.clone(),
-                        framer,
-                        decoder,
-                        text_encoding,
-                        plot_channels,
-                        plot_format,
-                    }
-                })
-                .collect(),
-            history: config.history_limit,
-            auto_reconnect: config.auto_reconnect,
-        }
-    }
-
-    // 把表单数据转换成 xserial-client 的 SessionConfig
-    pub fn to_session_config(&self) -> SessionConfig {
-        SessionConfig {
-            transport: match self.transport {
-                TransportChoice::Serial => TransportConfig::Serial {
-                    port: self.port.clone(),
-                    baud_rate: self.baud,
-                    data_bits: self.serial_data_bits,
-                    parity: self.serial_parity,
-                    stop_bits: self.serial_stop_bits,
-                    flow_control: self.serial_flow_control,
-                },
-                TransportChoice::Tcp => TransportConfig::Tcp {
-                    addr: self.addr.clone(),
-                },
-                TransportChoice::Udp => TransportConfig::Udp {
-                    bind_addr: self.udp_bind.clone(),
-                    remote_addr: if self.udp_remote.is_empty() {
-                        None
-                    } else {
-                        Some(self.udp_remote.clone())
-                    },
-                },
-            },
-            pipelines: self
-                .pipelines
-                .iter()
-                .map(|pipeline| PipelineConfig {
-                    name: pipeline.name.clone(),
-                    framer: match &pipeline.framer {
-                        FramerChoice::Line => FramerConfig::Line {
-                            strip_cr: true,
-                            max_line_len: 1_048_576,
-                        },
-                        FramerChoice::Fixed(n) => FramerConfig::Fixed { frame_len: *n },
-                        FramerChoice::MixedTextPlot => FramerConfig::MixedTextPlot {
-                            strip_cr: true,
-                            max_line_len: 1_048_576,
-                            max_plot_frame: 1_048_576,
-                        },
-                    },
-                    decoder: match &pipeline.decoder {
-                        DecoderChoice::Text => DecoderConfig::Text {
-                            encoding: pipeline.text_encoding,
-                        },
-                        DecoderChoice::Hex => DecoderConfig::Hex {
-                            uppercase: false,
-                            separator: " ".into(),
-                            bytes_per_group: 1,
-                            endian: xserial_core::protocol::Endian::Big,
-                        },
-                        DecoderChoice::Plot => DecoderConfig::Plot {
-                            sample_type: xserial_core::protocol::plot::SampleType::F32,
-                            endian: xserial_core::protocol::Endian::Little,
-                            channels: pipeline.plot_channels.max(1),
-                            format: pipeline.plot_format,
-                        },
-                        DecoderChoice::MixedTextPlot => DecoderConfig::MixedTextPlot {
-                            encoding: pipeline.text_encoding,
-                        },
-                    },
-                })
-                .collect(),
-            history_limit: self.history,
-            auto_reconnect: self.auto_reconnect,
-        }
-    }
-}
-
-// ── 渲染函数 ──────────────────────────────────────────────────────
-
-pub fn render(ui: &mut Ui, form: &mut ConfigForm, submit_label: &str) -> Option<SessionConfig> {
-    let mut result = None;
-    let mut validation_errors = Vec::new();
-
-    ScrollArea::vertical().show(ui, |ui| {
-        ui.heading("Transport");
-
-        // 传输类型下拉
-        ComboBox::from_label("Type")
-            .selected_text(match form.transport {
-                TransportChoice::Serial => "Serial",
-                TransportChoice::Tcp => "TCP",
-                TransportChoice::Udp => "UDP",
-            })
-            .show_ui(ui, |ui| {
-                ui.selectable_value(&mut form.transport, TransportChoice::Serial, "Serial");
-                ui.selectable_value(&mut form.transport, TransportChoice::Tcp, "TCP");
-                ui.selectable_value(&mut form.transport, TransportChoice::Udp, "UDP");
-            });
-
-        // 根据类型显示不同字段
-        match form.transport {
-            TransportChoice::Serial => {
-                ui.horizontal(|ui| {
-                    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));
-                });
-                ui.horizontal(|ui| {
-                    ui.label("Data bits:");
-                    ComboBox::from_id_salt("serial_data_bits")
-                        .selected_text(match form.serial_data_bits {
-                            SerialDataBits::Five => "5",
-                            SerialDataBits::Six => "6",
-                            SerialDataBits::Seven => "7",
-                            SerialDataBits::Eight => "8",
-                        })
-                        .show_ui(ui, |ui| {
-                            ui.selectable_value(
-                                &mut form.serial_data_bits,
-                                SerialDataBits::Five,
-                                "5",
-                            );
-                            ui.selectable_value(
-                                &mut form.serial_data_bits,
-                                SerialDataBits::Six,
-                                "6",
-                            );
-                            ui.selectable_value(
-                                &mut form.serial_data_bits,
-                                SerialDataBits::Seven,
-                                "7",
-                            );
-                            ui.selectable_value(
-                                &mut form.serial_data_bits,
-                                SerialDataBits::Eight,
-                                "8",
-                            );
-                        });
-                });
-                ui.horizontal(|ui| {
-                    ui.label("Parity:");
-                    ComboBox::from_id_salt("serial_parity")
-                        .selected_text(match form.serial_parity {
-                            SerialParity::None => "None",
-                            SerialParity::Odd => "Odd",
-                            SerialParity::Even => "Even",
-                        })
-                        .show_ui(ui, |ui| {
-                            ui.selectable_value(
-                                &mut form.serial_parity,
-                                SerialParity::None,
-                                "None",
-                            );
-                            ui.selectable_value(&mut form.serial_parity, SerialParity::Odd, "Odd");
-                            ui.selectable_value(
-                                &mut form.serial_parity,
-                                SerialParity::Even,
-                                "Even",
-                            );
-                        });
-                });
-                ui.horizontal(|ui| {
-                    ui.label("Stop bits:");
-                    ComboBox::from_id_salt("serial_stop_bits")
-                        .selected_text(match form.serial_stop_bits {
-                            SerialStopBits::One => "1",
-                            SerialStopBits::Two => "2",
-                        })
-                        .show_ui(ui, |ui| {
-                            ui.selectable_value(
-                                &mut form.serial_stop_bits,
-                                SerialStopBits::One,
-                                "1",
-                            );
-                            ui.selectable_value(
-                                &mut form.serial_stop_bits,
-                                SerialStopBits::Two,
-                                "2",
-                            );
-                        });
-                });
-                ui.horizontal(|ui| {
-                    ui.label("Flow:");
-                    ComboBox::from_id_salt("serial_flow_control")
-                        .selected_text(match form.serial_flow_control {
-                            SerialFlowControl::None => "None",
-                            SerialFlowControl::Software => "Software",
-                            SerialFlowControl::Hardware => "Hardware",
-                        })
-                        .show_ui(ui, |ui| {
-                            ui.selectable_value(
-                                &mut form.serial_flow_control,
-                                SerialFlowControl::None,
-                                "None",
-                            );
-                            ui.selectable_value(
-                                &mut form.serial_flow_control,
-                                SerialFlowControl::Software,
-                                "Software",
-                            );
-                            ui.selectable_value(
-                                &mut form.serial_flow_control,
-                                SerialFlowControl::Hardware,
-                                "Hardware",
-                            );
-                        });
-                });
-            }
-            TransportChoice::Tcp => {
-                ui.horizontal(|ui| {
-                    ui.label("Addr:");
-                    ui.text_edit_singleline(&mut form.addr);
-                });
-            }
-            TransportChoice::Udp => {
-                ui.horizontal(|ui| {
-                    ui.label("Bind:");
-                    ui.text_edit_singleline(&mut form.udp_bind);
-                });
-                ui.horizontal(|ui| {
-                    ui.label("Remote:");
-                    ui.text_edit_singleline(&mut form.udp_remote);
-                });
-            }
-        }
-
-        ui.separator();
-        ui.heading("Pipelines");
-
-        let mut remove = None;
-
-        // 管道列表
-        for (i, pipeline) in form.pipelines.iter_mut().enumerate() {
-            ui.group(|ui| {
-                ui.horizontal(|ui| {
-                    ui.label("Name:");
-                    ui.add(TextEdit::singleline(&mut pipeline.name).desired_width(60.0));
-
-                    // Framer 选择
-                    let fsel = match &pipeline.framer {
-                        FramerChoice::Line => "Line".to_string(),
-                        FramerChoice::Fixed(n) => format!("Fixed({})", n),
-                        FramerChoice::MixedTextPlot => "MixedTextPlot".to_string(),
-                    };
-                    ComboBox::from_id_salt(format!("f{}", i))
-                        .selected_text(fsel)
-                        .show_ui(ui, |ui| {
-                            if ui.selectable_label(false, "Line").clicked() {
-                                pipeline.framer = FramerChoice::Line;
-                            }
-                            if ui.selectable_label(false, "Fixed").clicked() {
-                                pipeline.framer = FramerChoice::Fixed(8);
-                            }
-                            if ui.selectable_label(false, "MixedTextPlot").clicked() {
-                                pipeline.framer = FramerChoice::MixedTextPlot;
-                                pipeline.decoder = DecoderChoice::MixedTextPlot;
-                            }
-                        });
-                    if let FramerChoice::Fixed(n) = &mut pipeline.framer {
-                        ui.add(DragValue::new(n).range(1..=65536));
-                    }
-
-                    // Decoder 选择
-                    ComboBox::from_id_salt(format!("d{}", i))
-                        .selected_text(match pipeline.decoder {
-                            DecoderChoice::Text => "Text",
-                            DecoderChoice::Hex => "Hex",
-                            DecoderChoice::Plot => "Plot",
-                            DecoderChoice::MixedTextPlot => "MixedTextPlot",
-                        })
-                        .show_ui(ui, |ui| {
-                            if ui.selectable_label(false, "Text").clicked() {
-                                pipeline.decoder = DecoderChoice::Text;
-                            }
-                            if ui.selectable_label(false, "Hex").clicked() {
-                                pipeline.decoder = DecoderChoice::Hex;
-                            }
-                            if ui.selectable_label(false, "Plot").clicked() {
-                                if matches!(pipeline.framer, FramerChoice::Line) {
-                                    pipeline.framer = FramerChoice::Fixed(256);
-                                }
-                                pipeline.decoder = DecoderChoice::Plot;
-                            }
-                            if ui.selectable_label(false, "MixedTextPlot").clicked() {
-                                pipeline.framer = FramerChoice::MixedTextPlot;
-                                pipeline.decoder = DecoderChoice::MixedTextPlot;
-                            }
-                        });
-
-                    if ui.button("✕").clicked() {
-                        remove = Some(i);
-                    }
-                });
-
-                if matches!(pipeline.decoder, DecoderChoice::Plot) {
-                    ui.horizontal(|ui| {
-                        ui.label("Plot channels:");
-                        ui.add(DragValue::new(&mut pipeline.plot_channels).range(1..=32));
-                    });
-                    ui.horizontal(|ui| {
-                        ui.label("Plot format:");
-                        ComboBox::from_id_salt(format!("plot_format{}", i))
-                            .selected_text(match pipeline.plot_format {
-                                PlotFormat::Interleaved => "Interleaved",
-                                PlotFormat::Block => "Block",
-                                PlotFormat::XY => "XY",
-                            })
-                            .show_ui(ui, |ui| {
-                                ui.selectable_value(
-                                    &mut pipeline.plot_format,
-                                    PlotFormat::Interleaved,
-                                    "Interleaved",
-                                );
-                                ui.selectable_value(
-                                    &mut pipeline.plot_format,
-                                    PlotFormat::Block,
-                                    "Block",
-                                );
-                                ui.selectable_value(
-                                    &mut pipeline.plot_format,
-                                    PlotFormat::XY,
-                                    "XY",
-                                );
-                            });
-                    });
-
-                    if matches!(pipeline.plot_format, PlotFormat::XY) {
-                        pipeline.plot_channels = 2;
-                    }
-
-                    match &pipeline.framer {
-                        FramerChoice::Line => {
-                            let message = "Plot decoder requires Fixed framer for raw binary samples";
-                            ui.colored_label(egui::Color32::RED, message);
-                            validation_errors
-                                .push(format!("pipeline '{}': {message}", pipeline.name));
-                        }
-                        FramerChoice::Fixed(n)
-                            if *n % (pipeline.plot_channels.max(1) * 4) != 0 =>
-                        {
-                            let message = format!(
-                                "Plot decoder currently expects interleaved f32 data, so frame length must be a multiple of {} bytes",
-                                pipeline.plot_channels.max(1) * 4
-                            );
-                            ui.colored_label(egui::Color32::RED, &message);
-                            validation_errors
-                                .push(format!("pipeline '{}': {message}", pipeline.name));
-                        }
-                        FramerChoice::MixedTextPlot => {
-                            let message = "Raw Plot decoder cannot be used with MixedTextPlot framer";
-                            ui.colored_label(egui::Color32::RED, message);
-                            validation_errors
-                                .push(format!("pipeline '{}': {message}", pipeline.name));
-                        }
-                        FramerChoice::Fixed(_) => {}
-                    }
-
-                    if matches!(pipeline.plot_format, PlotFormat::XY) && pipeline.plot_channels != 2
-                    {
-                        let message = "XY plot requires exactly 2 channels";
-                        ui.colored_label(egui::Color32::RED, message);
-                        validation_errors.push(format!(
-                            "pipeline '{}': {message}",
-                            pipeline.name
-                        ));
-                    }
-                }
-
-                if matches!(pipeline.decoder, DecoderChoice::Text) {
-                    ui.horizontal(|ui| {
-                        ui.label("Text encoding:");
-                        render_text_encoding_combo(ui, &mut pipeline.text_encoding, i);
-                    });
-                }
-
-                if matches!(pipeline.decoder, DecoderChoice::MixedTextPlot) {
-                    ui.horizontal(|ui| {
-                        ui.label("Mixed text encoding:");
-                        render_text_encoding_combo(ui, &mut pipeline.text_encoding, i);
-                    });
-                    ui.small("Plot sample type, endian, format, and channels come from the mixed packet header.");
-                }
-
-                if matches!(pipeline.decoder, DecoderChoice::MixedTextPlot)
-                    && !matches!(pipeline.framer, FramerChoice::MixedTextPlot)
-                {
-                    let message = "MixedTextPlot decoder requires MixedTextPlot framer";
-                    ui.colored_label(egui::Color32::RED, message);
-                    validation_errors.push(format!("pipeline '{}': {message}", pipeline.name));
-                }
-            });
-        }
-
-        if let Some(i) = remove {
-            form.pipelines.remove(i);
-        }
-
-        if ui.button("+ Add Pipeline").clicked() {
-            form.pipelines.push(PipelineForm {
-                name: format!("p{}", form.pipelines.len()),
-                framer: FramerChoice::Line,
-                decoder: DecoderChoice::Text,
-                text_encoding: TextEncoding::Utf8,
-                plot_channels: 1,
-                plot_format: PlotFormat::Interleaved,
-            });
-        }
-
-        ui.separator();
-        ui.horizontal(|ui| {
-            ui.label("History:");
-            ui.add(DragValue::new(&mut form.history).range(100..=1_000_000));
-        });
-        ui.checkbox(&mut form.auto_reconnect, "Auto reconnect");
-
-        ui.separator();
-        for error in &validation_errors {
-            ui.colored_label(egui::Color32::RED, error);
-        }
-        if ui.button(submit_label).clicked() {
-            if validation_errors.is_empty() {
-                result = Some(form.to_session_config());
-            }
-        }
-    });
-
-    result
-}
-
-fn render_text_encoding_combo(ui: &mut Ui, encoding: &mut TextEncoding, index: usize) {
-    ComboBox::from_id_salt(format!("text_encoding{}", index))
-        .selected_text(match encoding {
-            TextEncoding::Utf8 => "UTF-8",
-            TextEncoding::Latin1 => "Latin1",
-            TextEncoding::Ascii => "ASCII",
-        })
-        .show_ui(ui, |ui| {
-            ui.selectable_value(encoding, TextEncoding::Utf8, "UTF-8");
-            ui.selectable_value(encoding, TextEncoding::Latin1, "Latin1");
-            ui.selectable_value(encoding, TextEncoding::Ascii, "ASCII");
-        });
-}

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-gui/src/panels/sidebar.rs

@@ -1,51 +0,0 @@
-use crate::app::ConnectionStatus;
-use egui::{Color32, RichText, Ui};
-
-pub fn render(
-    ui: &mut Ui,
-    sessions: &[(u64, ConnectionStatus)], // (id, 连接状态)
-    active: &mut usize,                   // 当前选中的会话索引
-    on_new: &mut bool,                    // 点击了"新建"
-    on_delete: &mut Option<usize>,        // 点击了"删除"
-) {
-    ui.heading("Sessions");
-
-    // 新建按钮 — 绿色文字
-    if ui
-        .button(RichText::new("+ New Session").color(Color32::GREEN))
-        .clicked()
-    {
-        *on_new = true;
-    }
-
-    ui.separator();
-
-    // 会话列表
-    for (i, (id, status)) in sessions.iter().enumerate() {
-        let (color, icon) = match status {
-            ConnectionStatus::Connected => (Color32::GREEN, "●"),
-            ConnectionStatus::Disconnected => (Color32::GRAY, "○"),
-            ConnectionStatus::Connecting => (Color32::YELLOW, "◌"),
-            ConnectionStatus::Error(_) => (Color32::RED, "⨉"),
-        };
-
-        // selectable_label: 点击高亮，clicked() 判断是否被点击
-        let label = format!("{} Session {}", icon, id);
-        if ui
-            .selectable_label(*active == i, RichText::new(label).color(color))
-            .clicked()
-        {
-            *active = i;
-        }
-    }
-
-    ui.separator();
-
-    // 删除按钮 — 红色文字
-    if ui
-        .button(RichText::new("Delete").color(Color32::RED))
-        .clicked()
-    {
-        *on_delete = Some(*active);
-    }
-}

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_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
@@ -10,6 +10,11 @@ import time
 
 PLOT_ESCAPE = 0x1E
 PLOT_MARKER = ord("P")
+DISCONNECT_WINERRORS = {
+    10053,  # Software caused connection abort
+    10054,  # Connection reset by peer
+    10058,  # Socket shutdown race on Windows
+}
 
 
 def build_frame(
@@ -98,44 +103,56 @@ def build_mixed_plot_frame(
     )
     return bytes([PLOT_ESCAPE, PLOT_MARKER]) + cobs_encode(packet) + b"\x00"
 
-def main():
-    p = argparse.ArgumentParser(description="xserial plot test server")
-    p.add_argument("--host", default="127.0.0.1")
-    p.add_argument("--port", type=int, default=8080)
-    p.add_argument("--channels", type=int, default=1)
-    p.add_argument(
+
+def is_disconnect_error(err: OSError) -> bool:
+    return isinstance(
+        err,
+        (
+            BrokenPipeError,
+            ConnectionAbortedError,
+            ConnectionResetError,
+        ),
+    ) or getattr(err, "winerror", None) in DISCONNECT_WINERRORS
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="pipeview plot test server")
+    parser.add_argument("--host", default="127.0.0.1")
+    parser.add_argument("--port", type=int, default=8080)
+    parser.add_argument("--channels", type=int, default=1)
+    parser.add_argument(
         "--format",
         choices=("interleaved", "xy"),
         default="interleaved",
         help="plot format (default: interleaved)",
     )
-    p.add_argument(
+    parser.add_argument(
         "--rate",
         type=float,
         default=1024,
         help="samples/sec per channel (default: 1024)",
     )
-    p.add_argument("--freq", type=float, default=1.0, help="sine Hz")
-    p.add_argument("--amp", type=float, default=100)
-    p.add_argument(
+    parser.add_argument("--freq", type=float, default=1.0, help="sine Hz")
+    parser.add_argument("--amp", type=float, default=100)
+    parser.add_argument(
         "--text-interval",
         type=float,
         default=1.0,
         help="seconds between status text messages (default: 1.0)",
     )
-    p.add_argument(
+    parser.add_argument(
         "--framelen",
         type=int,
         default=0,
         help="fixed frame bytes (0=one sample per channel per frame)",
     )
-    p.add_argument(
+    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 = p.parse_args()
+    args = parser.parse_args()
 
     sample_size = 4  # f32
 
@@ -176,17 +193,36 @@ def main():
             values.append(args.amp * math.sin(2 * math.pi * args.freq * t + phase))
         return values
 
-    print(f"Listening {args.host}:{args.port} — Ctrl+C to stop")
+    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")
 
@@ -213,6 +249,25 @@ def main():
                 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,
@@ -235,16 +290,13 @@ def main():
 
                         now = time.perf_counter()
                         if args.wire_format == "mixed" and now >= next_text_at:
-                            values = sample_values(sample_index)
-                            joined = ", ".join(
-                                f"ch{index + 1}={value:8.3f}"
-                                for index, value in enumerate(values)
+                            conn.sendall(
+                                build_text_line(
+                                    started_at,
+                                    now,
+                                    sample_index,
+                                ).encode("utf-8")
                             )
-                            line = (
-                                f"时间={now - started_at:7.3f}s "
-                                f"样本={sample_index:7d} {joined}\n"
-                            )
-                            conn.sendall(line.encode("utf-8"))
                             text_count += 1
                             next_text_at += args.text_interval
 
@@ -255,8 +307,16 @@ def main():
                         wait = frame_count * frame_interval - elapsed
                         if wait > 0:
                             time.sleep(wait)
-                except (BrokenPipeError, ConnectionResetError):
-                    print(f"[conn -] {addr} ({frame_count} plot frames, {text_count} text lines)")
+                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)"
+                        )
                 finally:
                     conn.close()
         finally:
@@ -274,5 +334,6 @@ def main():
         stop_event.set()
         stream_thread.join(timeout=1.0)
 
+
 if __name__ == "__main__":
     main()

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;
+}
+}

tools/xs_mixed_plot.h

@@ -0,0 +1,237 @@
+#ifndef XS_MIXED_PLOT_H
+#define XS_MIXED_PLOT_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+/* MixedTextPlot plot frame:
+ *   0x1E 'P' + COBS(packet) + 0x00
+ *
+ * Plot packet:
+ *   "XP" +
+ *   version:u8 +
+ *   format:u8 +
+ *   sample_type:u8 +
+ *   endian:u8 +
+ *   channels:u8 +
+ *   samples_per_channel:u16le +
+ *   payload_len:u32le +
+ *   payload
+ */
+
+#define XS_MIXED_PLOT_ESCAPE 0x1E
+#define XS_MIXED_PLOT_MARKER 0x50 /* 'P' */
+
+#define XS_PLOT_MAGIC_0 0x58 /* 'X' */
+#define XS_PLOT_MAGIC_1 0x50 /* 'P' */
+#define XS_PLOT_VERSION 1
+
+#define XS_PLOT_FORMAT_INTERLEAVED 0
+#define XS_PLOT_FORMAT_BLOCK 1
+#define XS_PLOT_FORMAT_XY 2
+
+#define XS_SAMPLE_TYPE_F32 8
+#define XS_ENDIAN_LITTLE 0
+
+#define XS_PLOT_HEADER_SIZE 13
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+    XS_OK = 0,
+    XS_ERR_ARG = -1,
+    XS_ERR_BUF = -2
+} xs_status_t;
+
+static size_t xs_cobs_max_encoded_size(size_t input_len) {
+    return input_len + (input_len / 254u) + 1u;
+}
+
+static void xs_write_u16_le(uint8_t *dst, uint16_t v) {
+    dst[0] = (uint8_t)(v & 0xFFu);
+    dst[1] = (uint8_t)((v >> 8) & 0xFFu);
+}
+
+static void xs_write_u32_le(uint8_t *dst, uint32_t v) {
+    dst[0] = (uint8_t)(v & 0xFFu);
+    dst[1] = (uint8_t)((v >> 8) & 0xFFu);
+    dst[2] = (uint8_t)((v >> 16) & 0xFFu);
+    dst[3] = (uint8_t)((v >> 24) & 0xFFu);
+}
+
+static void xs_write_f32_le(uint8_t *dst, float v) {
+    union {
+        float f;
+        uint8_t b[4];
+    } u;
+    u.f = v;
+
+#if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+    dst[0] = u.b[3];
+    dst[1] = u.b[2];
+    dst[2] = u.b[1];
+    dst[3] = u.b[0];
+#else
+    dst[0] = u.b[0];
+    dst[1] = u.b[1];
+    dst[2] = u.b[2];
+    dst[3] = u.b[3];
+#endif
+}
+
+/* output must have at least xs_cobs_max_encoded_size(input_len) bytes */
+static size_t xs_cobs_encode(const uint8_t *input, size_t input_len, uint8_t *output) {
+    size_t read_index = 0;
+    size_t write_index = 1;
+    size_t code_index = 0;
+    uint8_t code = 1;
+
+    while (read_index < input_len) {
+        if (input[read_index] == 0) {
+            output[code_index] = code;
+            code = 1;
+            code_index = write_index++;
+            read_index++;
+        } else {
+            output[write_index++] = input[read_index++];
+            code++;
+            if (code == 0xFFu) {
+                output[code_index] = code;
+                code = 1;
+                code_index = write_index++;
+            }
+        }
+    }
+
+    output[code_index] = code;
+    return write_index;
+}
+
+static xs_status_t xs_plot_build_packet_f32(
+    const float *samples,
+    uint8_t channels,
+    uint16_t samples_per_channel,
+    uint8_t plot_format,
+    uint8_t *out,
+    size_t out_cap,
+    size_t *out_len
+) {
+    size_t i;
+    uint32_t value_count;
+    uint32_t payload_len;
+    size_t packet_len;
+    uint8_t *p;
+
+    if (!samples || !out || !out_len) {
+        return XS_ERR_ARG;
+    }
+    if (channels == 0) {
+        return XS_ERR_ARG;
+    }
+    if (plot_format == XS_PLOT_FORMAT_XY && channels != 2) {
+        return XS_ERR_ARG;
+    }
+    if (plot_format > XS_PLOT_FORMAT_XY) {
+        return XS_ERR_ARG;
+    }
+
+    value_count = (uint32_t)channels * (uint32_t)samples_per_channel;
+    payload_len = value_count * 4u;
+    packet_len = XS_PLOT_HEADER_SIZE + (size_t)payload_len;
+
+    if (out_cap < packet_len) {
+        return XS_ERR_BUF;
+    }
+
+    out[0] = XS_PLOT_MAGIC_0;
+    out[1] = XS_PLOT_MAGIC_1;
+    out[2] = XS_PLOT_VERSION;
+    out[3] = plot_format;
+    out[4] = XS_SAMPLE_TYPE_F32;
+    out[5] = XS_ENDIAN_LITTLE;
+    out[6] = channels;
+    xs_write_u16_le(&out[7], samples_per_channel);
+    xs_write_u32_le(&out[9], payload_len);
+
+    p = &out[13];
+    for (i = 0; i < (size_t)value_count; ++i) {
+        xs_write_f32_le(p, samples[i]);
+        p += 4;
+    }
+
+    *out_len = packet_len;
+    return XS_OK;
+}
+
+static xs_status_t xs_mixed_build_plot_frame_from_packet(
+    const uint8_t *packet,
+    size_t packet_len,
+    uint8_t *out,
+    size_t out_cap,
+    size_t *out_len
+) {
+    size_t encoded_len;
+
+    if (!packet || !out || !out_len) {
+        return XS_ERR_ARG;
+    }
+    if (out_cap < 2u + xs_cobs_max_encoded_size(packet_len) + 1u) {
+        return XS_ERR_BUF;
+    }
+
+    out[0] = XS_MIXED_PLOT_ESCAPE;
+    out[1] = XS_MIXED_PLOT_MARKER;
+    encoded_len = xs_cobs_encode(packet, packet_len, &out[2]);
+    out[2 + encoded_len] = 0x00;
+
+    *out_len = 2u + encoded_len + 1u;
+    return XS_OK;
+}
+
+static xs_status_t xs_mixed_build_plot_frame_f32(
+    const float *samples,
+    uint8_t channels,
+    uint16_t samples_per_channel,
+    uint8_t plot_format,
+    uint8_t *packet_buf,
+    size_t packet_buf_cap,
+    uint8_t *frame_buf,
+    size_t frame_buf_cap,
+    size_t *frame_len
+) {
+    xs_status_t rc;
+    size_t packet_len = 0;
+
+    if (!packet_buf || !frame_buf || !frame_len) {
+        return XS_ERR_ARG;
+    }
+
+    rc = xs_plot_build_packet_f32(
+        samples,
+        channels,
+        samples_per_channel,
+        plot_format,
+        packet_buf,
+        packet_buf_cap,
+        &packet_len
+    );
+    if (rc != XS_OK) {
+        return rc;
+    }
+
+    return xs_mixed_build_plot_frame_from_packet(
+        packet_buf,
+        packet_len,
+        frame_buf,
+        frame_buf_cap,
+        frame_len
+    );
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* XS_MIXED_PLOT_H */