# Cross-Platform Stability Implementation Results

- Date: 2026-06-05
- Branch: `codex/cross-platform-stability-redesign`
- Plan: `docs/plans/2026-06-05-cross-platform-stability-redesign.md`

## Completed Work Units

1. P0 audit
   - Recorded tmux, POSIX `tail`, provider env, TUI rendering, docs, and CI risks.
   - Commit: `55a6a51 docs: 크로스 플랫폼 P0 감사 기록`

2. P1 platform capability layer
   - Added OS, shell, terminal, color, unicode, emoji, box drawing, live render, and tmux hint detection.
   - Commit: `15708a7 feat: 플랫폼 capability 레이어 추가`

3. P2 process runner and provider env normalization
   - Added argv/env based `ProcessRunner`.
   - Normalized isolated provider env for Windows and macOS/Linux.
   - Commit: `6495952 feat: 프로세스 실행과 provider env 정규화`

4. P3 Python log follow
   - Replaced POSIX `tail -f` with `trinity.platform.log_tail.follow_log`.
   - Added rotate/delete/recreate/truncate events and UTF-8 replacement decoding.
   - Commit: `75ca391 feat: 로그 follow를 Python 구현으로 교체`

5. P4 tmux-free bootstrap default
   - Added sequential current-terminal bootstrap.
   - Kept tmux bootstrap behind `trinity bootstrap --legacy-tmux`.
   - Commit: `4a72200 feat: bootstrap 기본 경로에서 tmux 제거`

6. P5 adaptive TUI policy
   - Added modern/unicode/ascii/plain rendering policy abstraction.
   - Stabilized unknown-agent theme fallback.
   - Commit: `6c6060b feat: TUI 렌더링 정책 계층 추가`

7. P6 doctor, CI, docs
   - Added `trinity doctor`.
   - Added cross-platform smoke workflow.
   - Updated README, troubleshooting, and config template wording.

## Acceptance Mapping

- Basic command path no longer depends on tmux for provider bootstrap.
- `trinity logs --follow` no longer shells out to POSIX `tail`.
- Isolated provider state now covers Windows `USERPROFILE`, `APPDATA`, and `LOCALAPPDATA`, plus macOS/Linux XDG paths.
- TUI rendering decisions have a capability-aware policy layer.
- tmux remains available as explicit legacy/debug transport.
- CI now includes Windows/macOS/Linux smoke coverage for platform, bootstrap, logs, TUI policy, and console script entry points.

## Verification

Run before merging:

```bash
uv run pytest
uv build
```
