An integrated skill that runs the combined validation of build / typecheck / test / lint in one shot. The `verify.mjs` engine auto-discovers validation commands via a discovery chain (AGENTS.md's 「検証」 section → package.json scripts → justfile/Makefile/lefthook → language heuristics), executes them serially with their source attached, and returns a result summary. If a higher-priority stage produces a hit, only that stage is executed (no crossing stages).
