stdlib

Guided feature development for @webiny/stdlib using the DI abstraction → implementation → feature → index pattern. Use when adding a new tool, service, or feature to any slice (common, node, browser). Enforces TDD, file conventions, barrel exports, README creation, and the pre-commit chain. CRITICAL — existing tests must never be modified unless genuinely buggy.

Test-driven development with red-green-refactor loop. Use when user wants to build features or fix bugs using TDD, mentions "red-green-refactor", wants integration tests, or asks for test-first development.