feat(session-inbox-monitor): pi support — global extension section, v0.3.0

Pi (pi-coding-agent) sessions get inbox delivery via global extension
(.common/lib/pi-extensions/inbox-monitor.ts → ~/.pi/agent/extensions/).
Not cwd-scoped: any .claude-inbox/ message pages the current session with
project name in header. Headless = no delivery. SKILL.md v0.2.2→v0.3.0.
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# session-inbox-monitor-pi-extension — working context
**Status:** 🟢 done (shipped 2026-08-10) — pi-native inbox delivery shipped for ALL pi sessions, see STATUS.md block.
**Owner:** vitya (pi interactive session, .admin)
**Notify:** OpeItcLoc03/claude-skills
Pi (pi-coding-agent) не покрывался скилом: Monitor tool — CC-only, хуки CC-only.
Собран pi-native аналог: глобальное расширение, доставляющее сообщения из ЛЮБОГО
`.claude-inbox/` в текущую pi-сессию независимо от cwd (требование vitya: «мне
похуй, какой агент в какой папке сидит — система сообщений должна работать»).
## Решения
1. **Глобально, не cwd-scoped.** Скан всех инбоксов: прямые дети `~/projects`
(все 20 инбоксов живут на глубине 1, проверено find). Оверрайд —
`PI_INBOX_ROOTS` (pathsep, `;` на Windows).
2. **Два пути доставки** (контракт как у CC-хуков):
- PUSH: один глобальный poll-интервал 15s (интерактив только).
- PULL: `agent_settled` sweep — pi-эквивалент Stop-хука.
- Dedup per-process по `inbox|filename`; move в `.read/` — кросс-процессный
guard: кто первый swept — тот и забрал (CC hook или pi), второй пропускает.
3. **Headless (`pi -p`, `ctx.hasUI === false`) — НИКАКОЙ доставки.** Ни watcher,
ни sweep. Сообщения ждут интерактивную сессию. Зеркалит CC-headless (там
внешний Notify/ntfy, не инжект в ран) + не угоняет one-shot прогоны и не
съедает сообщения без обработки.
4. **Доставка:** `pi.sendUserMessage(body, { deliverAs: "followUp", triggerTurn:
true })` — заголовок `[inbox] <project>/<name>` + тело инлайн, потом move в
`.read/`. Пустые файлы (частичная запись) пропускаются и ретраятся.
5. **Source of truth:** `.common/lib/pi-extensions/inbox-monitor.ts` (Node
built-ins only, без npm deps — авто-дискавери без package.json). Деплой:
копия в `~/.pi/agent/extensions/inbox-monitor.ts` (global → все pi, все
директории). Hot-reload `/reload`. Тест: `inbox-monitor.test.mjs`
(`node --experimental-strip-types`, Node ≥22.6).
## Verified
- Функциональный тест 3 блоков (интерактив-глобал, headless-no-delivery,
partial-write-retry) — ALL TESTS PASSED.
- Нет зависания процесса: headless не стартует интервал; интерактив чистит
интервал в `session_shutdown` (timeout-прогон EXITED CLEANLY).
- Деплой: diff source↔`~/.pi/agent/extensions/` = 0 (byte-identical).
## Open questions / failure modes
- **Кросс-харнессный двойной пикап:** CC и pi оба свипят — `.read/` move делает
first-wins, не double-processing. Два pi-процесса на одной машине гонятся как
две CC-сессии (known limitation, см. SKILL.md).
- **Проверка живого pi-лоада** (что авто-дискавери подхватил расширение в
реальном TUI) — за `/reload` при следующей интерактивной pi-сессии.
- **Headless-доставка не реализована** (сознательно): при необходимости —
внешний Notify/ntfy, отдельная задача.

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--- ---
name: session-inbox-monitor name: session-inbox-monitor
version: 0.2.2 version: 0.3.0
description: > description: >
Raises a persistent Monitor (Monitor tool, NOT background Bash) on the Raises a persistent Monitor (Monitor tool, NOT background Bash) on the
project's `.claude-inbox/` at the start of an interactive session, so project's `.claude-inbox/` at the start of an interactive session, so
@@ -11,7 +11,9 @@ description: >
CLAUDE.md line `inbox monitor: raise on start`, or «подними монитор почты», CLAUDE.md line `inbox monitor: raise on start`, or «подними монитор почты»,
«настрой авто-монитор инбокса», «raise inbox monitor», «auto-arm inbox «настрой авто-монитор инбокса», «raise inbox monitor», «auto-arm inbox
watcher». Headless (`claude -p`): does NOT raise — Monitor doesn't work watcher». Headless (`claude -p`): does NOT raise — Monitor doesn't work
there; rely on the Stop-hook inbox pickup + Notify/ntfy. NOT for how to there; rely on the Stop-hook inbox pickup + Notify/ntfy. Pi (pi-coding-agent)
sessions: a global extension delivers any `.claude-inbox/` message to the
current session regardless of cwd (see the Pi section). NOT for how to
handle a received message (→ inter-session-peer-discipline) nor the handle a received message (→ inter-session-peer-discipline) nor the
multi-machine inbox backend (→ cross-machine-inbox design). multi-machine inbox backend (→ cross-machine-inbox design).
--- ---
@@ -127,6 +129,39 @@ for free on session end. Headless sessions skip it and rely on the pull-model
- **No repo writes.** The hook and its `~/.claude/settings.json` registration are - **No repo writes.** The hook and its `~/.claude/settings.json` registration are
machine-local; only this skill (docs) and `.claude-inbox/` activity are in play. machine-local; only this skill (docs) and `.claude-inbox/` activity are in play.
## Pi (pi-coding-agent) support — global extension
Same contract, pi-native, and **not cwd-scoped**: which folder the pi session
sits in is irrelevant — every `.claude-inbox/` under the configured roots is
watched and swept; a message pages the *current* pi session with the project
name in the header (`[inbox] <project>/<name>` + body inline, then moved to
`.read/`).
- **Source of truth:** `.common/lib/pi-extensions/inbox-monitor.ts` (Node
built-ins only, no npm deps). Deploy: copy to
`~/.pi/agent/extensions/inbox-monitor.ts` (global → every pi, every
directory), hot-reload with `/reload`. Test:
`node --experimental-strip-types .common/lib/pi-extensions/inbox-monitor.test.mjs`.
- **Roots:** direct children of `~/projects` by default (all inboxes live there,
depth 1); override with `PI_INBOX_ROOTS` (pathsep-separated, `;` on Windows).
- **PUSH:** one 15s global poll while a session is live (interactive only).
**PULL:** `agent_settled` sweep — the pi equivalent of the CC Stop-hook
pickup. Both share one dedup set per process; the `.read/` move is the
cross-process guard — first sweeper (CC hook or pi) claims the message, the
other skips it.
- **Headless (`pi -p`, `ctx.hasUI === false`):** NO delivery — no watcher, no
sweep. Messages sit in the inbox until an interactive session picks them up.
Mirrors CC headless (external Notify there, nothing in-run) and avoids
hijacking one-shot scripted runs or consuming messages nobody processes.
- **Delivery:** `pi.sendUserMessage(body, { deliverAs: "followUp", triggerTurn:
true })` — paged into the transcript as a user message; the agent handles it
per `inter-session-peer-discipline`. Partial writes (empty file) are skipped
and retried next poll.
- **Failure mode — cross-harness double-pickup:** CC and pi both sweep; the
`.read/` move makes it first-wins, not double-processing. Two live pi sessions
in one process tree share the dedup set; two pi *processes* on one machine
race like two CC sessions (known limitation, see Failure modes above).
## What NOT to do ## What NOT to do
- **Don't watch the inbox with a background Bash** (`run_in_background`) — it - **Don't watch the inbox with a background Bash** (`run_in_background`) — it