@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.

verify runs pre-commit validation for react contributions, executing formatting and linting sequentially before parallel type checking and dual test suites, with optional test pattern filtering.

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.

facebook-verify runs sequential linting and formatting checks, then parallel type checking and test suites. lacks detail on failure recovery and specific react requirements mentioned in description.

facebook-flags displays feature flag states across release channels and supports diffing between channels to debug inconsistent behavior, but lacks actionable procedures and error handling.

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.

extract-errors scans react source for error messages and assigns unique codes, detecting unassigned errors via a yarn command. synchronization validation is minimal.

Use when you need to run tests for React core. Supports source, www, stable, and experimental channels.