verifier-installer

The key words MUST, MUST NOT, SHOULD, SHOULD NOT and MAY in this skill are to be interpreted as described in BCP 14 (RFC 2119, RFC 8174) when, and only when, they appear in all capitals.

Stand up the verify→repair loop in a repository that doesn't have one: a single discoverable command per rail — format, build, test — and a CI workflow that runs the same commands. This is the action-taking sibling of agent-ready-rails: rails audits and reports that the loop is missing (its load-bearing R1/R2 finding); this skill installs it. The evidence behind why this rail matters most is in that skill's grounding — a verify loop the agent cannot skip is the single highest-leverage change for agent success.

Locating this skill's helpers (do this first). The steps below run bundled scripts. You execute from the target repo, not from this skill's directory, so a path written relative to this skill will not resolve. Resolve the base directory once and use it everywhere — including in any subagent prompt, which MUST receive the literal absolute path: