Step-by-step SKILL.md packages an AI follows for a single kind of task.
A skill is a focused playbook - instructions, examples and constraints - that makes any model reliable at one job, from SQL reporting to changelog writing. The router fills a plan's skill slot with the best match for the request.
Explicit, spec-driven TDD for non-trivial product behavior: requirements, UseCases, RED/GREEN/REFACTOR, E2E, and evidence-backed delivery. Use when the user selects $tdd-workflow and names a /tdd:* wo