Conciseness

The body is mostly efficient procedural instruction with no explanation of concepts Claude already knows, but it can be noticeably tightened: the "Issues by Priority" section re-enumerates the CRITICAL/WARNING/SUGGESTION contents already fully specified in steps 5–7 ('Incomplete tasks', 'Missing requirement implementations', 'Spec/design divergences', 'Missing scenario coverage'), and parts of "Verification Heuristics" ('Focus on objective checklist items', 'Use keyword search...') restate the step instructions. This is anchor 3 ('could be tightened') rather than anchor 4's 'minor instances' — the redundancy spans whole sections, not isolated lines — and well above anchor 2's padded explanations.

Actionability

Guidance is fully executable: exact copy-paste commands ('openspec list --json', 'openspec status --change "<name>" --json', 'openspec instructions apply --change "<name>" --json'), exact artifact paths ('openspec/changes/<name>/specs/'), exact parse markers ('### Requirement:', '#### Scenario:', '- [ ]' vs '- [x]'), a fixed issue taxonomy with literal message templates ('Requirement not found: <requirement name>'), and a concrete output format. Per the rubric's instruction-only-skill note, the absence of code is not penalized since the guidance is copy-paste-level actionable, matching anchor 5.

Workflow Clarity

Eight numbered steps in a clear sequence with explicit input handling up front ('Do NOT guess or auto-select a change'), a graceful-degradation ladder for missing artifacts ('If only tasks.md exists: verify task completion only... Always note which checks were skipped'), and an explicit final-assessment decision rule ('If CRITICAL issues... If only warnings... If all clear'). These are the validation checkpoints, error-recovery paths, and checklists anchor 5 requires; the skill is itself a verification workflow, so no validation gap remains, keeping it above anchor 4.

Progressive Disclosure

No bundle files exist and the body is well organized with numbered steps and distinct sections (Verification Heuristics, Graceful Degradation, Output Format), so nothing is buried. However, at ~155 lines it exceeds the simple-skill threshold that would let a single well-organized file score 5, and content like the report template and the per-dimension issue-generation rules could arguably live in reference files. That leaves minor organization/split opportunities, fitting anchor 4 ('Good structure; most content is appropriately placed; minor organization gaps') rather than anchor 5's 'appropriately split' ideal.

Specificity

The description names the domain ("change artifacts") and one concrete action ("Verify implementation matches change artifacts") plus the qualifiers "complete, correct, and coherent", but these are dimension adjectives rather than distinct listed actions (e.g., no mention of checking tasks, mapping requirements to code, or generating a report). This matches anchor 3 ('Names domain and 1-2 concrete actions, but not comprehensive') better than anchor 4, which expects several specific enumerated actions like 'Extracts text from PDF files, fills forms, converts pages to images'.

Completeness

Both parts are explicitly present: 'what' ("Verify implementation matches change artifacts") and 'when' ("Use when the user wants to validate that implementation is complete, correct, and coherent before archiving"). This clearly exceeds anchor 3 (what without when) but falls short of anchor 5, which requires concrete trigger-phrase variety like 'PDF files, PDFs, forms' — here the trigger is a single narrow condition with no synonyms or alternative phrasings.

Trigger Term Quality

Relevant natural keywords are present ("verify", "validate", "implementation", "before archiving"), but common variations a user would actually say are missing (e.g., "check the change", "review the specs/tasks", "is the change done", "ready to archive"). This fits anchor 3 ('Some relevant keywords but missing common variations or synonyms'), not anchor 4's 'Good keyword coverage; a few natural terms missing' — the gap is more than a few terms.

Distinctiveness Conflict Risk

"change artifacts" and "before archiving" anchor the skill to the openspec change-workflow niche, making it mostly distinct. It does not reach anchor 5 ('clear niche with distinct triggers; minimal conflict risk') because the bare phrase "Verify implementation" could plausibly fire for a generic code-review or test-verification request outside an openspec context — a minor overlap risk with closely related skills, matching anchor 4.