Closes session-inbox-monitor-stophook-utf8-fix. Cyrillic message bodies arrived
as mojibake when force-delivered via the Stop-hook block reason.
Root cause: ~/.claude/hooks/stop-dispatcher.ps1 reads bodies with -Encoding UTF8
(fine) but did NOT set [Console]::OutputEncoding, so ConvertTo-Json to stdout
under a harness-spawned redirected pipe (WinPS 5.1) emitted in OEM cp866.
Fix applied to the machine-local hook (not in git): set
[Console]::OutputEncoding/$OutputEncoding = UTF8 at the top. In-situ RED->GREEN
verified through the real Stop-hook path: a Cyrillic pangram that previously came
back as mojibake now delivers clean; no-loop holds.
Repo changes: SKILL.md Failure modes documents the encoding contract for inbox
writers (no-BOM UTF-8 LF; WriteAllText, not Set-Content -Encoding utf8 which BOMs
under 5.1); bump 0.2.0 -> 0.2.1 PATCH. stop-dispatcher.ps1 multi-machine
propagation is the workshop setup's concern (notified).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Core content task of the session-inbox-monitor line. Two deliverables:
1. SessionStart hook `skills/session-inbox-monitor/hooks/inbox-monitor.ps1`
(versioned for multi-machine rollout; deployed to ~/.claude/hooks/ and
registered in ~/.claude/settings.json SessionStart):
- sweep: Get-CimInstance | Stop-Process orphaned monitors of THIS inbox,
matched by sentinel CLAUDE_INBOX_MONITOR + inbox path (a /clear leaves
the poll process alive -> re-raise without sweep stacks duplicates);
- inject: hookSpecificOutput.additionalContext with the exact persistent
Monitor command (Monitor tool, not background Bash);
- opt-in gate: fires only on .claude-inbox/ dir or CLAUDE.md trigger line.
ASCII-only (em-dash -> mojibake under WinPS 5.1 without BOM, fixed).
2. SKILL.md body filled (When to use / Inputs / Steps / Deployment /
Failure modes / Side effects / What NOT to do); bump 0.1.0 -> 0.2.0 MINOR.
Headless: no hook-level signal exists (verified via claude-code-guide) ->
agent-side best-effort skip, default errs toward raising (false-skip in
interactive loses the feature; false-raise in headless is a harmless no-op).
Live-verified: inject -> valid JSON; sweep -> killed a planted orphan (PASS);
real Monitor tool spawns a bash process carrying the sentinel (sweep will
find real orphans); settings.json stays valid. Sweep over-match edge and
multi-session-per-project limit documented honestly in Failure modes.
Closes [session-inbox-monitor-sessionstart-hook].
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
