diff --git a/.trellis/workspace/hechang27-sprt/index.md b/.trellis/workspace/hechang27-sprt/index.md
index 5d1158d..45e2650 100644
--- a/.trellis/workspace/hechang27-sprt/index.md
+++ b/.trellis/workspace/hechang27-sprt/index.md
@@ -8,8 +8,8 @@
 
 <!-- @@@auto:current-status -->
 - **Active File**: `journal-1.md`
-- **Total Sessions**: 16
-- **Last Active**: 2026-04-03
+- **Total Sessions**: 17
+- **Last Active**: 2026-04-08
 <!-- @@@/auto:current-status -->
 
 ---
@@ -19,7 +19,7 @@
 <!-- @@@auto:active-documents -->
 | File | Lines | Status |
 |------|-------|--------|
-| `journal-1.md` | ~689 | Active |
+| `journal-1.md` | ~740 | Active |
 <!-- @@@/auto:active-documents -->
 
 ---
@@ -27,8 +27,9 @@
 ## Session History
 
 <!-- @@@auto:session-history -->
-| # | Date | Title | Commits |
-|---|------|-------|---------|
+| # | Date | Title | Commits | Branch |
+|---|------|-------|---------|--------|
+| 17 | 2026-04-08 | ListTableV2 flex-fill investigation | `6e18451033fcf4e6c9cf4ed3f2521c39b86cf2c5` | `dev` |
 | 16 | 2026-04-03 | Debug list-table-v2 virtual scrolling issues | - |
 | 15 | 2026-04-03 | Rebuild list-table-v2: Scaffold hooks and types | `0f72b83`, `87000d8` |
 | 14 | 2026-04-02 | Fix list-table-v2 fixed column cropping and horizontal scroll | - |
diff --git a/.trellis/workspace/hechang27-sprt/journal-1.md b/.trellis/workspace/hechang27-sprt/journal-1.md
index 2c625f5..f804bae 100644
--- a/.trellis/workspace/hechang27-sprt/journal-1.md
+++ b/.trellis/workspace/hechang27-sprt/journal-1.md
@@ -687,3 +687,54 @@ Fixed Vue 3 template ref auto-unwrap issue by destructuring visibleRows from vir
 ### Next Steps
 
 - None - task complete
+
+
+## Session 17: ListTableV2 flex-fill investigation
+
+**Date**: 2026-04-08
+**Task**: ListTableV2 flex-fill investigation
+**Branch**: `dev`
+
+### Summary
+
+(Add summary)
+
+### Main Changes
+
+| Area | Progress |
+|------|----------|
+| Width filling bug | Investigated live `ListTableV2` layout with agent-browser and confirmed cells were not consuming the full row width even when computed auto flex factors were >1. |
+| Runtime fix | Updated the nested `packages/base/data/list-table-v2/list-table-v2.vue` implementation so explicit-width columns render with fixed `flex: 0 0 width`, while auto-width columns apply inline `flexGrow`/`flexShrink`/`flexBasis` styles to the actual rendered header and body cells. |
+| Flex derivation | Adjusted auto-derived flex factors in `packages/base/data/list-table-v2/usePretextColumnWidths.ts` so generated values stay above `1`. |
+| Validation | Verified on `http://localhost:5173/#/table-v2` that the section-9 row gap dropped from a non-zero trailing gap to `0`, with row cell widths summing to the full row width. |
+| Spec sync | Updated frontend component guidelines and example-page copy to match the current auto-flex behavior. |
+
+**Updated Files**:
+- `.trellis/spec/frontend/component-guidelines.md`
+- `examples/view/base/table-v2.vue`
+- `packages/base/data/list-table-v2/list-table-v2.vue`
+- `packages/base/data/list-table-v2/usePretextColumnWidths.ts`
+- `AGENTS.md`
+- `CLAUDE.md`
+
+**Status**:
+- Active task `04-03-list-table-v2-tanstack-pretext` remains open; this session records progress only and does not archive the task.
+
+
+### Git Commits
+
+| Hash | Message |
+|------|---------|
+| `6e18451033fcf4e6c9cf4ed3f2521c39b86cf2c5` | (see git log) |
+
+### Testing
+
+- [OK] (Add test results)
+
+### Status
+
+[OK] **Completed**
+
+### Next Steps
+
+- None - task complete