chore: record journal

.trellis/workspace/FallenSigh/journal-1.md

@@ -41,3 +41,36 @@ Created file-based vector Verilog testbenches () for all 10 top-level sync modul
 ### Next Steps
 
 - None - task complete
+
+
+## Session 2: Fix 7 failing Vivado XSIM testbenches
+
+**Date**: 2026-06-25
+**Task**: Fix 7 failing Vivado XSIM testbenches
+**Branch**: `main`
+
+### Summary
+
+Fixed 7 testbench failures on Vivado 2019.2: (1) sha3_top.v declaration ordering, (2) TCL variable paths + --relax flag, (3) Verilog part-select changed to +: operator, (4) BRAM read latency timing, (5) comp_decomp d=12 edge case, (6) sample_ntt TB timing bug (DUT Keccak pipeline drain). All 10 modules now pass.
+
+### Main Changes
+
+(Add details)
+
+### Git Commits
+
+| Hash | Message |
+|------|---------|
+| `f5365c9` | (see git log) |
+
+### Testing
+
+- [OK] (Add test results)
+
+### Status
+
+[OK] **Completed**
+
+### Next Steps
+
+- None - task complete