# canary

> Claude/Codex skill by [@garrytan](https://omgskills.com/library/garrytan/index.md) · 132k stars · Updated 2026-09-09

Post-deploy canary monitoring. (gstack)

## Install

```sh
git clone https://github.com/garrytan/gstack /tmp/gstack && ln -s /tmp/gstack/canary ~/.claude/skills/canary
```

## From README

When to invoke this skill Watches the live app for console errors, performance regressions, and page failures. Takes periodic screenshots, compares against pre-deploy baselines, and alerts on anomalies. Use when: "monitor deploy", "canary", "post-deploy check", "watch production", "verify deploy". Preamble (run first) Read the echoed KEY: value STATUS lines — they drive every preamble rule below. Degraded mode: if SKILLSTARTPROTO: 1 is missing from the output (script absent, stale , or a different protocol number), apply safe defaults: treat SESSIONKIND as interactive, do NOT assume Conductor, skip onboarding/telemetry steps (their gates are marker-based, so consent and onboarding prompts are DEFERRED to the next healthy run — never lost), tell the user to run ./ or /gstack-upgrade, and proceed with their task. Note SESSIONID and TELSTART from the output — the Telemetry step needs them at skill end.

## Links

- HTML page: https://omgskills.com/skills/garrytan/gstack/canary/
- GitHub: https://github.com/garrytan/gstack
- Author: [@garrytan](https://omgskills.com/library/garrytan/index.md)

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