Conciseness

The body is efficient — no explanations of concepts Claude already knows, and sections like Validation Methods and Validation Rules are terse bullet/config blocks. It falls short of a 5 due to minor redundancy: the line under the H1 duplicates the Purpose section, and the 'Manual Criteria' bullets ('UI/UX requirements, Performance benchmarks...') are generic filler that could be trimmed.

Actionability

The Quick Start gives mostly executable code ('from scripts.criteria_validator import CriteriaValidator... result = await validator.validate_feature("auth-001")') backed by a real script, plus a concrete result JSON and a YAML rules block. Minor gaps keep it from a 5: 'project_dir' is never defined in the example, and key operations like how tests are discovered or how criteria are matched to tests have no concrete commands — matching 'Mostly executable guidance; concrete code or commands with minor gaps'.

Workflow Clarity

The five-step Workflow ('1. Load... 5. Report') is a clear sequence, but each step is a one-word label with no validation checkpoints or failure handling — what to do when tests fail, when a criterion can't be verified, or whether to re-run after fixes. This matches 'Steps listed but validation gaps; sequence present but checkpoints missing or implicit'; the Validation Rules section defines thresholds but the workflow never wires them into the sequence, so it does not reach a 4.

Progressive Disclosure

Good structure: Quick Start up front, well-organized sections, and the API Reference correctly points one level deep to the real 'scripts/criteria_validator.py' rather than inlining the implementation. Not a 5 because detailed material (the Validation Methods breakdown and custom-rule YAML) is inlined in SKILL.md where the rubric favors pointing to reference files, and the skill exceeds the under-50-line simple-skill exception.

Specificity

The description names the domain ('Validate acceptance criteria and feature completion') and a couple of concrete actions, but the listed variations ('validating test results', 'verifying acceptance criteria', 'determining feature completion status') are near-synonyms of the same single action rather than several distinct capabilities. This matches the anchor 'Names domain and 1-2 concrete actions, but not comprehensive'; it is not score 4 because there are no genuinely distinct actions like analyzing coverage or generating validation reports.

Completeness

Both what and when are explicitly answered with concrete trigger phrases: 'Validate acceptance criteria and feature completion' (what) followed by 'Use when checking if features pass, validating test results, verifying acceptance criteria, or determining feature completion status' (when). This matches the anchor 'Clearly and explicitly answers both what AND when with concrete trigger phrases'.

Trigger Term Quality

Natural phrases users would say are present: 'checking if features pass', 'validating test results', 'verifying acceptance criteria', 'feature completion status' — good keyword coverage with synonym variation. Not score 5 because common variations a user might say (e.g., 'acceptance tests', 'QA gates', 'definition of done', 'does this feature meet requirements') are missing; not score 3 because the coverage clearly exceeds 'some relevant keywords' with multiple natural phrasings.

Distinctiveness Conflict Risk

'Acceptance criteria' establishes a clear niche with distinct triggers, so conflict risk is low, matching 'Mostly distinct; minor overlap risk'. Not score 5 because 'validating test results' could overlap with a generic test-execution skill, leaving minor overlap risk with closely related skills.