Conciseness

The body is dense and assumes competence — it never explains TypeScript, vitest, or scoring concepts Claude already knows — but includes minor trim opportunities: the ~50-line full unit-test template in Step 5 and the three worked Examples partially restate the Step 1-4 patterns. This fits 'efficient; minor instances of over-explanation that could be trimmed' rather than the lean-every-token-earns-its-place anchor above, and is clearly above the 'mostly efficient with unnecessary explanation' anchor below.

Actionability

Guidance is copy-paste ready: complete function and registration templates, exact commands ("grep -r \"'your_unique_check_id'\" src/scoring/checks/\"", "npm test src/scoring/checks/__tests__/your-file.test.ts"), and three concrete worked examples with real constants (POINTS_CLAUDE_RULES = 3, CODE_BLOCK_THRESHOLDS) and expected results. The only placeholder ("/* e.g., countFiles() */") is inherent to scaffolding new code and is backfilled by the concrete examples, matching the fully-executable anchor.

Workflow Clarity

Steps 1-5 are clearly sequenced with explicit validation checkpoints after each step ("Verify ID uniqueness: Run grep...", "Verify filtering: Examine filterChecksForTarget()"), a hard gate before shipping ("All must pass before shipping"), and a feedback loop via the Common Issues troubleshooting section. This matches the top anchor with explicit validation steps and error-recovery guidance; the operation is not destructive or batch, so no cap applies.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), so the skill is a self-contained file with well-organized sections (Critical, Step 1-5, Examples, Common Issues) and no nested or buried references — good structure. It falls short of the top anchor because the ~284-line body inlines content (the full test template and worked examples) that could be split into a references/ file to keep SKILL.md a leaner overview, matching 'good structure; minor organization gaps'.

Specificity

The description lists multiple concrete actions with exact implementation anchors: "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() in src/scoring/index.ts". This matches the anchor for multiple specific concrete actions with comprehensive coverage of the skill's scope; it is clearly above the 'several specific actions; minor gaps' anchor because there are no meaningful gaps for a single-purpose code skill.

Completeness

It explicitly answers both questions: 'what' (add a deterministic scoring check following the Check[] pattern with constants and registration) and 'when' ("Use when user says 'add scoring check', 'new check', 'modify scoring criteria', or works in src/scoring/checks/") plus an explicit negative boundary ("Do NOT use for display changes or refactoring scoring logic"). This is the top anchor with concrete trigger phrases, clearly above the 'when could be more explicit' anchor.

Trigger Term Quality

Triggers are natural user phrasings with synonym coverage and a path-based trigger: "Use when user says 'add scoring check', 'new check', 'modify scoring criteria', or works in src/scoring/checks/". It covers natural terms, a synonym ('scoring criteria' vs 'check'), and a concrete path, matching the comprehensive-coverage anchor rather than the 'a few natural terms missing' anchor below it.

Distinctiveness Conflict Risk

The skill occupies a clear niche (adding scoring checks in a specific module path) with distinct triggers and an explicit exclusion clause for display changes and refactoring, minimizing conflict risk with adjacent skills. It exceeds the 'mostly distinct; minor overlap risk' anchor because the triggers and negative boundary disambiguate it from generic code-modification skills.