# Canary Watch (canary-watch)

> Watches a deployed URL for regressions in HTTP status, console errors, network failures, performance, content, APIs, static assets and SSE streams.

- Category: [Monitoring & Ops](https://www.myskills.tools/en/categories/monitoring-ops/)
- Source: Community · Affaan Mustafa
- Repository: https://github.com/affaan-m/ECC/tree/main/skills/canary-watch (commit db7f2a6)
- SKILL.md: https://github.com/affaan-m/ECC/blob/main/skills/canary-watch/SKILL.md
- Install command: `npx skills add affaan-m/ECC --skill canary-watch`
- License: MIT
- Compatible with: Claude Code, Codex, Cursor, Copilot, OpenCode
- Permissions: read-repo ✗, write-files ✓, shell ✓, network ✓
- Status: Scan passed
- A rule scan cannot catch every risk. Read this skill's SKILL.md and check its permissions before installing.
- ⚠ If a Slack or Discord webhook is configured, monitoring results are sent to that third-party service.

## Core rule

Alert immediately when any critical threshold is crossed, such as a non-200 status or a 5xx from an API.

## Execution Phases

1. **Pick a watch mode** — Default to a single quick check, or run a sustained watch with an interval and duration, or compare staging against production.
2. **Run the checks** — Check HTTP status, console errors, network requests, LCP/CLS/INP, key page elements, API health, static assets and SSE heartbeats.
3. **Classify by threshold** — Compare results to the baseline and sort them into critical, warning and info.
4. **Notify and report** — On critical breaches, send a desktop notification and log it, optionally post to Slack or Discord, then output a canary report table.

## Permissions (summarised from SKILL.md)

| Capability | Needed | Details |
|---|---|---|
| File writes | Limited | Only appends alerts to ~/.claude/canary-watch.log. |
| Command execution | Limited | Used for desktop notifications on macOS or Linux and for repeating checks at an interval. |
| Network outbound | Required | Requests the watched URL and its APIs, static assets and SSE endpoints, and optionally calls Slack or Discord webhooks. |

## SKILL.md frontmatter (YAML)

```yaml
---
name: canary-watch
description: Use this skill to monitor and verify a deployed URL after releases — checks HTTP endpoints, SSE streams, static assets, console errors, and performance regressions after deploys, merges, or dependency upgrades. Smoke / canary / post-deploy verification.
metadata:
  origin: ECC
---
```

Home: https://www.myskills.tools/en/ · URL: https://www.myskills.tools/en/skills/canary-watch/