Conciseness

At ~280 lines the body is mostly efficient (project-specific conventions like ".js extension in imports (TypeScript transpiles to ES modules)" earn their place), but the ~50-line unit-test template with three nearly-duplicate test cases, a ~30-line check-function template whose fix-object fields duplicate the Critical section, and a 7-item Common Issues list could all be tightened or trimmed. Anchor 3 ("mostly efficient but includes some unnecessary explanation or could be tightened") fits better than 4, where only minor trimming would be needed.

Actionability

Guidance is highly executable: full TypeScript templates, exact verification commands ("Run grep -r \"'your_unique_check_id'\" src/scoring/checks/", "npm test src/scoring/checks/__tests__/your-file.test.ts"), concrete file-to-category mapping, and three worked examples with expected point outcomes. Not a 5 because the core template contains placeholder pseudocode ("const yourMetric = /* e.g., countFiles(), validatePaths(), etc. */;", "// Set up the passing condition") that the reader must fill in — minor gaps, matching anchor 4.

Workflow Clarity

Five clearly sequenced steps (constants → check function → platform filtering → registration → tests), each ending with an explicit verification checkpoint ("Verify ID uniqueness: Run grep...", "Verify registration: Run npm test...", "Verify: Review CATEGORY_MAX..."), plus a test-writing step with a run-and-fail feedback loop ("All must pass before shipping"). This matches anchor 5's explicit validation steps and feedback loops; anchor 4 would require some checkpoints to be missing, and none are.

Progressive Disclosure

Section headers (Critical, Instructions, Examples, Common Issues) give real structure, but the skill is a single monolithic file with no references at all, and content that clearly belongs in separate files — the ~50-line test template and the 7-item troubleshooting list — is inlined. Anchor 3 ("some structure... content that should be separate is inline") fits; anchor 4 requires references to be 'mostly clear', which is moot when none exist for a 280-line body.

Specificity

Quotes like "Add a new deterministic scoring check in src/scoring/checks/", "Follows the Check[] return pattern", "uses point constants from src/scoring/constants.ts", and "integrates via filterChecksForTarget()" name several concrete actions with real paths and symbols. Not a 5 because "evaluates config quality" stays generic about what aspects of quality are checked, leaving a minor coverage gap.

Completeness

It explicitly answers both what ("Add a new deterministic scoring check... Follows the Check[] return pattern, uses point constants..., integrates via filterChecksForTarget()") and when (an explicit "Use when user says..." clause with concrete trigger phrases). This mirrors the anchor-5 example structure; a 4 would require the 'when' to be less explicit, which it is not.

Trigger Term Quality

"Use when user says 'add scoring check', 'new check', 'modify scoring criteria', or works in src/scoring/checks/" provides natural quoted phrases a user would actually say, plus a path-based trigger and negative triggers ("Do NOT use for display changes or refactoring scoring logic"). Coverage matches the anchor-5 example's breadth of natural terms and synonyms for its niche; nothing above this anchor exists.

Distinctiveness Conflict Risk

The niche is narrow (adding checks to a specific scoring module) with distinct quoted triggers and an explicit exclusion clause ("Do NOT use for display changes or refactoring scoring logic"), minimizing conflict risk with adjacent skills. Clear niche with distinct triggers matches anchor 5; anchor 4's 'minor overlap risk' does not apply given the negative boundary.