Skillify — The Meta Skill

Relationship to /cross-modal-review: That skill is the manual mid-flow "second opinion" gate (one model reviews work product before commit). This skill's Phase 3 below uses gbrain eval cross-modal instead — three different-provider frontier models score-and-iterate on a documented dimension list before tests cement behavior. Use /cross-modal-review for ad-hoc second opinions; use Phase 3 here when skillifying a feature.

Contract

A feature is "properly skilled" when all 15 checklist items (0 + 1–14; 3b rides with item 3) pass. gbrain skillify check audits the mechanical items (1–11); items 0, 3b, 12, 13, and 14 are procedural gates the agent verifies directly. Item 3 (cross-modal eval) is informational in the audit — it does not gate gbrain skillify check, but a missing or stale receipt is surfaced so the user knows where the gate stands.