Conciseness

The body is dense and rule-packed with no explanations of concepts Claude already knows, but minor over-explanation could be trimmed, e.g., the exhaustive CSS colour-function enumeration 'rgb(), rgba(), hsl(), hsla(), hwb() or color()' and several long multi-clause sentences in the Scope bullets. This fits the efficient-with-minor-trims 4 anchor rather than the every-token-earns-its-place 5 anchor.

Actionability

Guidance is fully concrete for an instruction-only skill: exact paths ('src/games/<game-id>/game.ts', 'src/carnival/theme.ts'), exact APIs ('recordScore(<game>.id, score)', 'theme.colors', 'canvasFont(...)'), the exact canvas properties to audit ('fillStyle, strokeStyle, font, shadowColor, gradient stops'), and a concrete do-not-report checklist. This matches the 5 anchor and exceeds the minor-gaps 4 anchor.

Workflow Clarity

A clear sequence is present: read AGENTS.md's 'House rules' section before the diff, then the Method's per-game trace (follow start, count recordScore calls per round-ending path, back-trace canvas values), then the Threshold's explicit report/don't-report checklist, then the Reporting format. It sits at the 4 anchor because the Threshold section supplies most checkpoints but no explicit validate-and-retry feedback loop steps exist, keeping it below 5.

Progressive Disclosure

The body is roughly 30 lines with well-organized sections (Scope, Method, Threshold, Reporting), no inlined content that belongs in separate files, and its one external pointer (AGENTS.md 'House rules' section) is clearly signaled; under the simple-skill guidance this matches the 5 anchor.

Specificity

The description names a concrete review action and enumerates the specific rule areas ('shared midway base, its registry, its score board and its theme'), matching the several-specific-actions anchor; it stops short of 5 because the individual review checks (e.g., default export, recordScore calls) are not themselves listed.

Completeness

It explicitly answers both questions: 'Review a change to a carnival game for the house rules...' states the what, and 'Use as one lens in a code review run on src/games' is an explicit, concrete when-clause, matching the 5 anchor rather than the vaguer 4 anchor.

Trigger Term Quality

Natural terms a user would say are present ('code review', 'carnival game', 'house rules', 'src/games'), giving good coverage; it falls short of the 5 anchor because common synonyms and variations (e.g., 'game review', 'review the games') are missing.

Distinctiveness Conflict Risk

The carnival/midway house-rules niche with AGENTS.md and src/games triggers is highly distinct with minimal overlap risk against any generic skill, matching the clear-niche 5 anchor.