Lean, skill-specific content that assumes Claude's competence — it does not explain what boot/smoke/CI concepts are, and every section (7-layer stack, workflow, output) earns its place with actionable detail.

Provides concrete, copy-paste-ready commands (pnpm dev, cargo run, docker compose up, curl .../health, make verify, just verify, ./scripts/verify.sh) plus a concrete audit-output example and a labeled output template.

Clear four-phase sequence (Audit → Setup → Improve → Stop) with an explicit build order, a grading/validation loop (pass/partial/fail, lowest dimension sets grade), and an explicit stop criterion ("reaches C and can be judged honestly").

The overview is well-organized and references are clearly signaled one level deep (grading.md, setup-patterns.md, industry-examples.md), but the references/ directory does not exist, so all three links are broken and navigation fails the "easy navigation" bar.

Lists many concrete actions — "boot scripts, smoke tests, CI/CD gates, dev environment setup, observability, worktree isolation, and .worktreeinclude handling" — rather than vague language, matching the multi-action anchor.

Explicitly answers both what (audit/build agent infrastructure) and when ("Use when...") plus an explicit anti-trigger ("Do not use for reviewing an existing diff or for documentation-only cleanup").

Natural trigger phrasing a user would actually say — "a repo can't boot, tests are broken or missing, there's no dev environment, agents can't verify their work, agents need human help" — with good coverage of common variations.

Clear niche (agent-readiness infrastructure) with distinct triggers and an explicit exclusion clause that separates it from diff-review and documentation skills, making wrong-skill conflicts unlikely.