Verify Against Deterministic Gates

Runs whatever deterministic checks the project actually has, and produces a gate report — the evidence that Step 8 (Open PR) puts in front of a reviewer and Step 9 (Close Loop) records. This is Step 7: Pick up source → Brainstorm → SPEC.md → Slices → Review → Branch → Execute → Verify → PR + bot → Close loop

Why this is a standalone skill and not a checkbox inside gsdl-execute: most repos don't yet have CI that enforces this automatically. Until CI/local parity and unbypassable ratchets exist, this skill is the manual crutch that makes "verify" a deliberate, evidenced step rather than something that quietly gets skipped.

Tier

MEDIUM. The gates are deterministic by definition — discover the project's real checks, run them, capture the output verbatim. There's no judgment to spend a LARGE model on. When the gsdl orchestrator runs Step 7 it spawns a MEDIUM subagent for it.