Canary Watch

Name: Canary Watch
Author: affaan-m

affaan-m/everything-claude-code

4.5k installs
238k repo stars
Updated August 5, 2026
affaan-m/everything-claude-code

Monitor deployed URLs for regressions across status, errors, performance, and content after deployment or risky changes.

About

Canary-watch monitors deployed URLs for regressions by checking HTTP status codes, console errors, network failures, Core Web Vitals (LCP/CLS/INP), critical content elements, and API endpoint SLAs. Developers use it post-deployment, after merging risky PRs, or following dependency upgrades. It runs in quick-check mode (single pass), continuous monitoring (N minutes over M hours), or diff mode comparing staging vs production. Critical thresholds trigger desktop notifications and optional Slack/Discord webhooks. Integrates with /benchmark for performance comparison and /browser-qa for full UI testing. Monitors 6 regression categories: HTTP status, console errors, network failures, Core Web Vitals, content integrity, API health Three monitoring modes: quick-check (single pass), continuous (interval-based over duration), diff (staging vs production comparison) Tiered alerting - critical (HTTP != 200, 5+ new errors, LCP > 4s), warning (LCP +500ms, CLS > during launch windows.

Monitors 6 regression categories: HTTP status, console errors, network failures, Core Web Vitals, content integrity, API
Three monitoring modes: quick-check (single pass), continuous (interval-based over duration), diff (staging vs productio
Tiered alerting - critical (HTTP != 200, 5+ new errors, LCP > 4s), warning (LCP +500ms, CLS > 0.1), info (minor variance
Tracks Core Web Vitals against baseline with pass/fail on LCP, CLS, INP and network request count changes
Desktop notifications (macOS/Linux) and optional Slack/Discord webhooks for critical threshold breaches

Canary Watch by the numbers

4,495 all-time installs (skills.sh)
+221 installs in the week ending Aug 5, 2026 (Skillselion tracking)
Ranked #284 of 2,153 Testing & QA skills by installs in the Skillselion catalog
Security screen: MEDIUM risk (skills.sh audit)
Data as of Aug 5, 2026 (Skillselion catalog sync)

At a glance

canary-watch capabilities & compatibility

Capabilities: single pass regression check on deployed url · continuous interval based monitoring over durati · staging vs production diff mode comparison · core web vitals baseline tracking (lcp, cls, inp · console error and network failure detection · critical content element validation (h1, nav, fo · api endpoint sla verification · desktop and webhook notifications
Works with: slack
Use cases: testing · devops · ci cd · debugging
Platforms: macOS · Linux
Runs: Remote server
Pricing: Free

npx skills add https://github.com/affaan-m/everything-claude-code --skill canary-watch

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Installs	4.5k
repo stars	★ 238k
Security audit	2 / 3 scanners passed
Last updated	August 5, 2026
Repository	affaan-m/everything-claude-code ↗

What it does

Monitor deployed URLs for regressions in HTTP status, console errors, network failures, performance metrics, content integrity, and API health after deployment or dependency upgrades.

Who is it for?

Post-deployment verification, dependency upgrade validation, continuous staging/production monitoring during launch windows.

Skip if: Local development iteration, comprehensive end-to-end UI testing, load testing.

When should I use this skill?

After deploying to production or staging, after merging risky PRs, after dependency upgrades, during launch windows.

What you get

Automated monitoring detects critical and warning-level regressions immediately; developers receive alerts and detailed canary reports.

canary watch log
regression report
endpoint health status

By the numbers

Monitors 6 regression categories (HTTP, errors, network, performance, content, API)
Tracks 3 Core Web Vitals: LCP, CLS, INP
Critical threshold: LCP > 4s, > 5 new errors, > 2x baseline response time

Files

SKILL.mdMarkdownGitHub ↗

カナリアウォッチ — デプロイ後の監視

使用時期

本番またはステージングへのデプロイ後
危険なPRをマージした後
修正が実際に修正されたことを確認したい場合
ローンチウィンドウ中の継続的監視
依存関係アップグレード後

動作方法

デプロイされたURLの回帰を監視します。停止されるか監視ウィンドウが期限切れになるまで、ループで実行されます。

監視内容

1. HTTPステータス — ページは200を返していますか？
2. コンソールエラー — 以前なかった新しいエラーはありますか？
3. ネットワークの障害 — 失敗したAPIコール、5xx応答？
4. パフォーマンス — LCP/CLS/INPの回帰対ベースライン？
5. コンテンツ — 主要な要素は消えましたか？（h1、nav、footer、CTA）
6. API健康 — 重要なエンドポイントはSLA内で応答していますか？

監視モード

クイックチェック（デフォルト）：シングルパス、レポート結果

/canary-watch https://myapp.com

継続監視：N分ごとにM時間チェック

/canary-watch https://myapp.com --interval 5m --duration 2h

差分モード：ステージング対本番を比較

/canary-watch --compare https://staging.myapp.com https://myapp.com

警告しきい値

critical:  # 即座の警告
  - HTTPステータス != 200
  - コンソールエラー数 > 5（新しいエラーのみ）
  - LCP > 4s
  - APIエンドポイントは5xxを返す

warning:   # レポートで報告
  - LCP ベースラインから > 500ms増加
  - CLS > 0.1
  - 新しいコンソール警告
  - レスポンス時間 > 2xベースライン

info:      # ログのみ
  - マイナーパフォーマンス分散
  - 新しいネットワークリクエスト（サードパーティスクリプトが追加された？）

通知

重大なしきい値を超えたとき：

デスクトップ通知（macOS/Linux）
オプション：Slack/Discord Webhook
~/.claude/canary-watch.logにログ

出力

## Canary Report — myapp.com — 2026-03-23 03:15 PST

### Status
- ✓ HTTP 200
- ✓ No critical errors
- ✓ LCP within SLA (1.8s)

### Diffs from Baseline
- CLS: 0.08 (↓ 0.02)
- Response: 245ms (↑ 12ms, OK)
- Network: 42 requests (↑ 3, investigate third-party?)