82 lines
4.3 KiB
Markdown
82 lines
4.3 KiB
Markdown
---
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name: ms-watch
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description: Use for all instances where a watch, wait, or agentic status check is needed. This skill avoid the need for wait cycles and other methods used to wait for an action outcome.
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disable-model-invocation: false
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---
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# ms-watch — self-armed condition watches
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One CLI call arms an isolated `systemd --user` transient timer per watch. Each
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tick is a fresh, cgroup-isolated process; no loop, no script, no orphan. You
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never `sleep`, never write a watch script, never background anything.
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## Tool
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```bash
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MOSAIC_AGENT_SEND="/absolute/checkout/tools/tmux/agent-send.sh" \
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/absolute/checkout/tools/agent-watch/agent-watch.sh start \
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--name <lowercase-id> --session <your-tmux-session> \
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[--socket <tmux-socket>] # REQUIRED for mosaic-fleet seats using tmux
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--when '<shell command>' # exit 0 = met; quote it
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--message "text delivered to you" \
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[--class actionable|reaction|human|digest|terminal-log] \
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[--interval 30] [--timeout 3600] [--repeat] [--quiet-timeout]
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agent-watch.sh list # your host's watches
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agent-watch.sh log <name> # what it did and why
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agent-watch.sh stop <name> # retire + clean state
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```
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Use the actual checkout path in place of `/absolute/checkout`. The CLI otherwise
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uses a sender under `$HOME/.config/mosaic`, which may not be this repository's
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reviewed transport. No timers or meta-watch are installed merely by loading this
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skill. Live watch operations require assignment authority. `list` and `status`
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can write stale-notice claims and send messages; they are not read-only probes.
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The CLI's `status [--json]` returns 0 for clean, 3 for stale/dead meta-watch,
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and 6 for an unreachable systemd user bus. Do not infer health from a failed query.
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## Rules
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1. **Name it for the thing watched** (`ci-pr1350-green`, `peer-orch-01-reply`),
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not for yourself — names appear in `[watch:<name>]` message prefixes and
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in `systemctl list-timers 'agent-watch-*'`.
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2. **Interval floor is 10s.** A watcher is a fallback cadence. If you find
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yourself wanting 1s polls, the real fix is an event, not a faster watch.
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3. **Timeout is real** (default 1h): on expiry you get one terminal-log note
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(unless `--quiet-timeout`) and the watch retires. A watch is never forever;
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re-arm deliberately if the condition is still pending.
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4. **Conditions are cron-style**: clean-ish environment, `cwd=$HOME`. Use
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absolute paths. Do NOT rely on ambient credentials — resolve tokens through
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the git credential helper or absolute service-credential paths.
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5. **Transport is not application acceptance.** The current watcher treats sender
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exit 0 and 2 as terminal for retry purposes. Exit 0 means transport dispatched,
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application acceptance unknown; exit 2 does not prove submission or receipt.
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Its legacy `delivered` log wording is not an acknowledgement. Other sender
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failures retry twice, then retire; do not add blind resends.
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6. **A broken condition (exit ≠ 0/1) retires the watch** with a terminal-log
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note. Check `log <name>` before re-arming — re-arming a broken condition
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without fixing it just burns another timeout.
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7. **`--repeat` re-arms after every delivery.** Default is one-shot on purpose:
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each watch should correspond to one pending fact.
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8. **Retire your watches** when the mission closes (`stop`). `list` shows
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stale-state entries whose timer is gone; stop removes those too.
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9. Fleet seats MUST pass `--socket mosaic-fleet`. Socket selection is explicit
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option, then MOSAIC_TMUX_SOCKET, then unique discovery; ambiguity refuses.
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## When NOT to watch
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- Waiting on another SEAT: send them a message (agent-send / comms) instead —
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a watch polling their output is a loop wearing a hat.
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- Waiting on yourself: just do the next thing.
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- Something that already has a wake path (fleet watcher injects comms
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automatically): those arrive without any watch.
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## Failure model (what you'll see)
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| Symptom | Meaning |
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|---|---|
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| `started watcher ...` then nothing, timer inactive | condition broke (exit ≠ 0/1) or timeout hit — `log <name>` says which |
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| `[watch:x] ... timeout after Ns` | retired; re-arm only if still relevant |
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| delivered (rc=2) in log | legacy retry classification, not proof of receipt; reconcile through authorized records, not private-pane inspection |
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| delivery failed rc=1 after 3 attempts | your session was gone; restart it, then re-arm |
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