React Build Lens

Choose the smallest useful React build lens for the current task.

Rule

Pick the smallest lens set that fits the touched React surface. Do not run every React skill by default. Do not fix all warnings by default.

Framework knowledge comes from the installed framework, not a generic skill. When the installed Next.js package includes node_modules/next/dist/docs/, read the relevant guide there first for runtime claims, then choose any additional lens whose smell still applies. Resolve the package from the owning app when working in a monorepo. Use Next DevTools MCP when the repo configures it.

Use this only when more than one React skill or evidence oracle could apply. For obvious single-skill work, use that skill directly. Do not use this for React Native or Expo.

Cold-agent guardrails: