cairn

Use when working in a repo that has cairn installed — teaches when to invoke cairn, which skills wrap which verification moments, and how YAML specs are derived silently from prose. Routes to spokes for deep topics (YAML authoring, hash placeholders, source-hash comment format, code-reviewer pattern).

Use when executing an implementation plan inside a cairn-tracked repo. Composition over superpowers:subagent-driven-development — same dispatch flow, with cairn task claim / evidence / verdict / complete checkpoints inserted at named steps.

Use when about to claim work is complete inside an active cairn claim. Composition over superpowers:verification-before-completion — same Iron Law, with evidence put + verdict bound before the completion claim. Tracked-only. Without an active claim, use superpowers:verification-before-completion directly.