Codex review iteration 1 fixes:
- Iterate all tmux pane TTYs instead of only the first — prevents
false "exited" in multi-pane sessions
- Handle EPERM from process.kill(pid, 0) as "process exists" — EPERM
means the process is alive but we lack permission to signal it
- Use word-boundary regex for process name matching — prevents false
positives on similar names like "claude-code" or paths containing
the substring
- Add tests for EPERM handling, multi-pane detection, and strict
name matching (134 tests total)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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