The skill is mostly efficient and well-structured, but some principles and workflow steps could be tightened. Phrases like 'Verify proves the change boots, passes guardrails, and survives the real surface; it is not a ship decision' repeat what's already conveyed elsewhere. The Principles and Handoffs sections have some redundancy with each other and with the workflow steps.

The skill provides concrete, executable guidance throughout: specific commands like `make verify`, `curl http://127.0.0.1:3000/health`, `node dist/cli.js --help`; clear examples of self-corrections (typos, unused imports, `any` types); a concrete output template with an example. The workflow steps are specific and copy-paste ready where appropriate.

The 5-step workflow is clearly sequenced with explicit validation checkpoints: run guardrails first, exercise the real surface, self-correct, probe adjacent risk, then synthesize verdict. The feedback loop is present (fix and re-run), and the verdict system provides clear decision gates. The 'Before You Start' section adds pre-flight checks, and the handoffs section clarifies boundaries.

The skill provides a clear overview with well-signaled one-level-deep references to three supporting files (verification.md, evidence-rules.md, simplification.md). Content is appropriately split between the main skill and references. The inline references within workflow steps are contextually placed where they're needed.

Lists multiple specific concrete actions: run repo guardrails (lint, typecheck, tests, build), exercise the real surface with evidence, catch self-correctable issues, and produces a specific verdict output (ready for review / needs more work / blocked).

Clearly answers both 'what' (self-check completed changes, run guardrails, exercise real surface, produce a verdict) and 'when' (explicit 'Use when' clause with multiple triggers, plus a 'Do not use when' clause that further clarifies scope and boundaries).

Excellent coverage of natural trigger terms users would say: 'check your work', 'run checks', 'validate changes', 'ready', 'test it end-to-end', 'lint', 'typecheck', 'tests', 'build'. These are phrases a user would naturally use when wanting a pre-review sanity check.

Clearly carved niche as a pre-review self-check skill with distinct scope boundaries. The 'Do not use when' clause explicitly excludes auditing others' diffs/PRs, and the 'never a ship decision' constraint further distinguishes it from deployment or review approval skills.