ccusage

Guides ccusage monorepo development. Use when editing packages, docs, shared configuration, bundled CLI packaging, dependencies, exports, or validation commands.

Guides ccusage Rust and Vitest tests. Use when adding or fixing cargo tests, CLI snapshots, Claude model pricing, LiteLLM compatibility, Vitest tests, or fixture-backed tests.

Guides ccusage TypeScript and JavaScript work. Use before reading or editing .ts, .tsx, .js, or .jsx files, including package launchers, Vitest tests, Bun scripts, schemas, mocks, and typed fixtures.

Guides t-wada Red-Green-Refactor TDD. Use when implementing features, fixing bugs, or refactoring logic with strict test-first development.

Creates atomic Conventional Commits. Use when committing code changes, splitting hunks into revertable units, or writing detailed commit messages.

Profiles ccusage performance. Use when debugging slow Rust CLI commands, TypeScript package scripts, launchers, benchmarks, packaging hot paths, or branch-vs-main speed changes.

Checks local bun-types documentation before using or changing Bun runtime APIs such as Bun.$, files, spawning, argv, stdout, stderr, and string width.