Performance Expert Skill

Backend, database, and infrastructure performance. This skill owns the server-side and delivery-layer of a stack: request latency, data access, caching, background work, and what ships over the wire.

Render-time work inside React components — re-renders, memoization, virtualized lists, Profiler traces — is a different diagnosis with different tooling. Route it to react-component-performance instead of duplicating it here.

Contract

Inputs:

• A performance symptom with a surface: an endpoint, a query, a job, a build output, or a metric that regressed.

Outputs: