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.
Parallel validation deployment. Spawn 8+ QA agents to run tests, builds, lints, and health checks simultaneously. Zero marginal wall-clock cost.