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observability-baseline

Scaffold-time observability so a shipped product is not blind in prod from day one — error capture (Sentry), request-id structured logging, and /healthz + /readyz endpoints. stack-baseline pins Sentry but nothing wires it; this is the wiring. Loaded by app-scaffolder (bake into the scaffold), infra-provisioner (prod env + probes), and consumed by l3-support (traces) and devops (deploy gate).

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avelikiy/great_cto
Works withSentry
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SKILL.md (original)

Review the instructions the agent will receive before you install.

observability-baseline

stack-baseline names Sentry and wires it nowhere — so every shipped product's first prod incident is invisible, and l3-support triages blind. This skill makes three things exist at scaffold time. Defaults baked in; no founder question.

1. Error capture (Sentry)

  • instrumentation.ts (Next.js) / SDK init at process start; DSN from SENTRY_DSN env (never hardcoded).
  • CI uploads source maps on release so stack traces are readable (release = git sha).
  • Capture unhandled rejections + a global error boundary on the client.

2. Request-id structured logging

  • A logger that emits JSON (not console.log prose) with a per-request request_id (generate at the edge, propagate via header/async-local-storage).
  • Levels: error / warn / info / debug — diagnostics go to stderr, never mixed into user-facing stdout. (Same discipline as the CLI logging gap, DEEPEN d94.)
  • One log line per request with: request_id, method, path, status, latency_ms.

3. Health endpoints

  • GET /healthz — liveness (process up). GET /readyz — readiness (deps reachable: db, cache). Cheap, unauthenticated, no PII.
  • These are what infra-provisioner probes and what a load balancer checks.

Wiring (a skill is shelfware unless a consumer loads it)

ConsumerWhat it does with this skill
app-scaffolderbakes instrumentation.ts + the JSON logger + /healthz+/readyz into the generated app; adds SENTRY_DSN to .env.example
infra-provisionersets SENTRY_DSN in the prod env list; points the platform health probe at /readyz; records the Sentry project in PROVISION
l3-supportfirst triage step reads Sentry + the request-id logs (a trace now exists to read)
devopsdeploy gate fails if /readyz doesn't return 200 post-deploy

Output

A scaffolded app where the first prod error is captured, every request is traceable by id, and the platform can health-check it. Record the Sentry project + endpoints in docs/infra/PROVISION-{slug}.md. Done = the three pieces exist AND are wired into the prod env, not just present in code.

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