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Deploy check

Skill claude-hangar/claude-hangar/core/skills/deploy-check

Deployment readiness check for Docker/Traefik projects. Use when: "deploy check", "deployment check", "ready for deployment", "deploy-check", "before deploy", "production ready".From its SKILL.md

Install
npx -y skills add claude-hangar/claude-hangar --skill deploy-check

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

4 things to look at

  • reads credentialsReads from 3 credential sources: `.env` and 2 more.
  • 1 stars1 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.
  • runs commandsInstructs the agent to run 4 commands, including `docker compose config --quiet 2>&1` and 3 more.
  • fetches URLsInstructs the agent to fetch 1 URL, including https://DOMAIN/health.

SKILL.md

4.5 KB, ~1.2k tokens by cl100k_base, as published. Nobody here has run it

<!-- AI-QUICK-REF ## /deploy-check — Quick Reference - **Modes:** check (all), docker, env, ssl - **Checks:** Docker Compose, .env completeness, Traefik labels, SSL certs, health endpoint - **Output:** Checklist with OK/ERROR/WARNING per check - **Prerequisite:** Docker Compose project with Traefik -->

/deploy-check — Deployment Readiness

Checks whether a project is ready for deployment. Focus on Docker + Traefik stack.

Modes

ModeArgumentChecks
check/deploy-check (default)All 5 checks
docker/deploy-check dockerDocker Compose only
env/deploy-check env.env comparison only
ssl/deploy-check ssl example.comSSL cert check only

Checks

1. Validate Docker Compose

docker compose config --quiet 2>&1
  • Find syntax errors in docker-compose.yml / compose.yml
  • Verify service names, ports, volumes
  • Finding: DEPLOY-01: Docker Compose syntax error

1b. Docker Engine Version

docker version --format '{{.Server.Version}}' 2>/dev/null
  • Minimum: 29.3.1 (CVE-2026-34040 fix: AuthZ plugin bypass via >1MB request body, CVSS 8.8)
  • Finding: DEPLOY-01b: Docker Engine {version} < 29.3.1 — critical security vulnerability

2. Environment Comparison

Compare .env.example with .env (or .env.production):

  • Missing variables in .env that exist in .env.example
  • Empty values for required variables (DB credentials, secrets)
  • Variables in .env not documented in .env.example
  • Finding: DEPLOY-02: Variable {NAME} missing in .env
  • Finding: DEPLOY-03: Variable {NAME} is empty

3. Traefik Labels

Check in docker-compose.yml:

  • traefik.enable=true present
  • traefik.http.routers.*.rule=Host(...) set
  • traefik.http.routers.*.tls.certresolver set (Let's Encrypt)
  • traefik.http.routers.*.entrypoints=websecure (HTTPS)
  • Finding: DEPLOY-04: Traefik label {label} missing

4. SSL Cert Expiry

Only when domain is provided or readable from Traefik labels:

echo | openssl s_client -servername DOMAIN -connect DOMAIN:443 2>/dev/null | openssl x509 -noout -dates
  • Check expiry date (>30 days: OK, 7-30: WARNING, <7: ERROR)
  • Finding: DEPLOY-05: SSL cert for {DOMAIN} expires in {N} days

5. Health Endpoint

Only when domain/URL is provided or derivable from Compose:

curl -sf -o /dev/null -w "%{http_code}" https://DOMAIN/health
  • HTTP 200: OK
  • Other status or timeout: WARNING
  • Finding: DEPLOY-06: Health endpoint responds with {STATUS}

Output Format

## Deploy Check: [Project Name]

### 1. Docker Compose
   OK: Syntax valid, 3 services defined

### 2. Environment
   WARNING: 2 missing variables
   - DEPLOY-02: DATABASE_URL missing in .env
   - DEPLOY-03: JWT_SECRET is empty

### 3. Traefik Labels
   OK: Host, TLS, entrypoints configured

### 4. SSL Cert
   OK: Valid until 2026-06-15 (93 days)

### 5. Health Endpoint
   OK: HTTP 200 in 120ms

---
Result: 5 checks, 3 OK, 1 WARNING, 1 ERROR
Recommendation: Set missing .env variables before deploy

6. AI Act Compliance (Conditional)

Only for projects that deploy or integrate AI models/agents:

  • GPAI provider obligations (transparency, documentation, copyright compliance)
  • High-risk AI system classification check
  • AI content labeling requirements (extended to Feb 2027)
  • Finding: DEPLOY-07: AI component detected but no AI Act compliance documentation

Context: EU AI Act GPAI enforcement powers effective August 2, 2026. Fines up to EUR 15M or 3% of global turnover (Art. 101).

7. DSA Platform Obligations (Conditional)

Only for platforms with user-generated content or advertising:

  • Age verification measures for restricted content
  • Advertising repository transparency
  • Researcher data access provisions
  • Minor protection measures
  • Finding: DEPLOY-08: UGC platform without DSA compliance measures

Context: DSA enforcement 2026. First fine: EUR 120M (X). Focus: age verification, minor protection.

Rules

  • Read-only — does not modify any files
  • Works even without a running Docker daemon (config check)
  • SSL/health check only when domain is reachable
  • If docker compose is unavailable: file-based checks only
  • AI Act / DSA checks only triggered when project type warrants it

What ships with it: 1 file

388 B alongside SKILL.md

Keep looking

Skills are one crate of 325,949. Ordering is by how many stacks a row turns up in, so the top of any crate is what has actually been picked rather than what has the most stars.