What problem does it solve? Deciding how much testing to run during development and executing a safe, complete release of the Flix game engine is error-prone: full test suites are slow, generated assets are invisible to git, and precommit gates fail for recurring reasons. This Skill codifies the exact verification loop, byte-identical rendering comparison, and release checklist so nothing is skipped. ## Core Features & Use Cases - Scoped test loop: Run only make test-<name> for affected packages during development, reserving the full make test-par gate for release time. - Byte-identical render verification: Use make render-par, make reference-check, and per-template benchmarks to prove refactors did not change generated images, since gallery/ is untracked by git. - Release checklist: A copyable 5-step checklist covering make bump FROM=x TO=y, commit/push, make release, and external fetch validation, plus known failure modes of precommit, jargon, sync, and lint gates. - Use Case: After refactoring engine rendering code, follow the Skill to re-render all templates, confirm zero diffs in assets/sfx, then bump the version and cut a GitHub Release with the bundled engine zip. ## Quick Start Ask the AI to follow the release skill to verify the current changes and cut a new release with make bump and make release.