---
phase: 06.3
plan: "18"
subsystem: ui
tags: [client, chat, css, uat]
requires:
  - phase: "06"
    provides: "ChatHUD DOM overlay and chat message rendering"
provides:
  - "D-56 ChatHUD readability bump: wider chat, stronger background contrast, bounded scrolling"
affects: [phase-06.3, cli-08-uat, ChatHUD]
tech-stack:
  added: []
  patterns: ["Inline DOM CSS strings remain the ChatHUD styling surface"]
key-files:
  created: []
  modified:
    - apps/client/src/ui/ChatHUD.ts
key-decisions:
  - "Kept the fix to CSS-only ChatHUD styling: no behavior or protocol changes."
patterns-established:
  - "Chat log readability changes should preserve native DOM text rendering outside the Phaser canvas."
requirements-completed:
  - REQ-CLI-07
  - REQ-CLI-08
duration: 8 min
completed: 2026-05-14
---

# Phase 06.3 Plan 18: D-56 ChatHUD Readability Summary

**ChatHUD now uses a wider, higher-contrast, scroll-bounded log container for staging UAT readability**

## Performance

- **Duration:** 8 min
- **Started:** 2026-05-14T08:35:00Z
- **Completed:** 2026-05-14T08:43:00Z
- **Tasks:** 2
- **Files modified:** 1

## Accomplishments

- Increased ChatHUD max width from `480px` to `560px`.
- Increased chat log background opacity from `rgba(10,14,26,0.45)` to `rgba(10,14,26,0.75)`.
- Added `max-height: 200px; overflow-y: auto;` so long chat history scrolls instead of overflowing.

## Task Commits

1. **Task 1/2: Apply and commit D-56 CSS bump** - `aa21dc2` (`fix(06.3-18)`)

## Files Created/Modified

- `apps/client/src/ui/ChatHUD.ts` - Updated ChatHUD inline styles with source comments and impl trace tags.

## Decisions Made

None - followed plan as specified.

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None.

## Verification

- `pnpm --filter @rebno/client test --run` - PASS, 26 test files passed, 190 tests passed, 4 todo.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

Ready for Wave 4 staging/UAT verification. Operator still needs to visually confirm readability on staging per plan manual UAT.

---
*Phase: 06.3*
*Completed: 2026-05-14*