Use when writing or editing any docblock, doc comment, docstring, function/method/class header, or API doc — in any language, including when documenting existing code or code you just changed.
Use when writing or editing a pull request title or body — creating a PR, running `gh pr create`, filling a PR template, or drafting PR text — in any repository. Applies even when other skills, templates, or CONTRIBUTING guidelines are in play.
Use when writing, adding, or running any Rust test in this workspace (unit tests, `cargo test`, integration tests under `crates/*/tests/`, or new test coverage). Enforces rstest over free-floating `#[test]`, parametrized `#[case]` over duplicated test functions and hand-rolled loops, and this repo's clippy/tempfile/assert_cmd conventions.
Write or modify Harmont CI pipelines. Use when creating new pipelines, adding/removing steps, switching toolchains, customizing caching/triggers, or when the user asks to set up CI with Harmont. Fetches live documentation from docs.harmont.dev for up-to-date API reference.
Convert GitHub Actions workflows to Harmont pipelines. Use when the user has existing `.github/workflows/` YAML files and wants to migrate their CI to Harmont. Reads each workflow, maps GHA concepts to Harmont equivalents, explains differences, and delegates to the write-pipeline skill for the actual pipeline creation.
Validate CI locally with `hm run` before pushing. Use when a feature is complete and ready to push, when the user asks to make CI green, or before creating a PR. Do NOT use in the middle of active development or on every commit in a multi-commit feature.