@facebook

test runs react codebase test suites across multiple release channels (source, experimental, www, stable, classic) with configurable variants and watch mode, mapping channel arguments to yarn test commands with standardized flags.

feature-flags covers managing react feature flags across channels, gating tests conditionally, and debugging flag-specific test failures using @gate pragmas and inline gate() branching.

flags inspects feature flag states across react release channels, enabling comparison and export via command-line options for debugging channel-specific behavior.

flow runs static type checking on react code across multiple renderer targets (dom, native, fabric). reports type errors with file locations to assist debugging.

fix covers running prettier and lint checks to catch formatting and code quality issues before ci, with minimal guidance on failure modes or recovery.

verify — an installable skill for AI agents, published by facebook/react.

extract-errors — an installable skill for AI agents, published by facebook/react.

Use when you want to validate changes before committing, or when you need to check all React contribution requirements.