Conciseness

Mostly efficient — templates, commands, and formats rather than concept explanations — but several sections are padded or duplicated: 'When to Activate' restates the frontmatter triggers, the grader-type list appears twice ('Grader Types' and again under 'Product Evals (v1.8)' as 'Code grader / Rule grader / Model grader / Human grader'), pass@k guidance appears twice ('Metrics' and 'pass@k Guidance'), and the eval storage layout is described twice ('Eval Storage' and 'Minimal Eval Artifact Layout'). This fits the level-3 anchor ('mostly efficient but includes some unnecessary explanation or could be tightened'); it is not level 4 because the duplication is substantive rather than minor, but not level 2 since nothing explains concepts Claude wouldn't know.

Actionability

The body provides mostly executable guidance: copy-paste grader commands ('grep -q "export function handleAuth" src/auth.ts && echo "PASS" || echo "FAIL"'), CLI invocations ('node scripts/eval-harness.js example', '/eval check feature-name'), and complete markdown eval templates. It is not level 5 because some steps remain placeholders, e.g. '[Run each capability eval, record PASS/FAIL]' and '[Write code]' in the workflow example, leaving minor gaps for a fresh user.

Workflow Clarity

The four-phase sequence (Define → Implement → Evaluate → Report) is clearly laid out with a worked 'Example: Adding Authentication', and regression evals act as a built-in checkpoint. It is not level 5 because the Evaluate phase lacks an explicit failure feedback loop — there is no 'if an eval fails, fix and re-run' step, and the workflow example defers to '/eval check' rather than spelling out validation; it is well above level 3 since sequence and most checkpoints are present.

Progressive Disclosure

The body is sectioned with clear headers, but the bundle contains no references/, scripts/, or assets/ directories, so the inline pointers ('scripts/lib/eval-harness/', 'node scripts/eval-harness.js example', 'See docs/architecture/eval-harness-frameworks.md') reference files that do not exist in the skill, and substantial material (framework utility details, the duplicated Product Evals v1.8 content) is inlined where it could live one level deep. This matches the level-3 anchor ('some structure but could be better organized; references present but not clearly signaled; content that should be separate is inline') — structure exists, but the reference topology is broken and content placement needs work.

Specificity

The description lists multiple concrete actions — 'define capability and regression evals before coding', 'grade with code-based, model-based, rule, or human graders', 'track pass@k and pass^k reliability' — giving comprehensive coverage of the skill's capabilities. It matches the level-5 anchor ('lists multiple specific concrete actions; comprehensive coverage') and is not the level-4 anchor because there are no meaningful gaps in the action inventory.

Completeness

It explicitly answers both questions: 'what' (define capability and regression evals, grade with four grader types, track pass@k and pass^k) and 'when' via an explicit 'Use when' clause with concrete trigger phrases. This directly matches the level-5 anchor example's structure and is not level 4, where the 'when' would be less specific.

Trigger Term Quality

Strong natural phrases users would say: 'defining pass/fail criteria', 'measuring agent reliability', 'building regression suites', 'benchmarking across model versions'. It falls short of the level-5 anchor because common synonyms and variations are missing (e.g. 'testing an agent change', 'evals', 'flaky tests'), so it sits between the good-coverage and comprehensive-coverage anchors, noticeably above the midpoint.

Distinctiveness Conflict Risk

The niche is clear — eval-driven development for AI coding sessions with pass@k/pass^k metrics and grader taxonomies — and the trigger terms ('pass/fail criteria for agent tasks', 'benchmarking across model versions') are unlikely to fire for unrelated skills. It matches the level-5 'clear niche with distinct triggers' anchor; the only conceivable overlap is generic test-suite work, which the EDD/pass@k framing disambiguates.