Conciseness

The body is lean: each rule states what to check and what counts as a finding in minimal form ("Report a finding only when the change breaks one of these rules"), with no concept explanations and a "Stay quiet on" section that prevents wasted effort. Every token earns its place, matching anchor 5 rather than anchor 4's minor over-explanation.

Actionability

Guidance is fully concrete: exact paths (src/games/<game-id>/game.ts, src/games/index.ts, src/carnival/theme.ts), an exact call signature (recordScore(game.id, score)), finding criteria precise down to rgb(/hsl( and '16px sans-serif', and an explicit report format ("Quote the line, name the rule, and say what the fix is"). For an instruction-only skill this matches anchor 5's fully executable standard; anchor 4 would require minor gaps that are not present.

Workflow Clarity

The single task is unambiguous and sequenced: scope ("Review only the files this pull request changes under src/games/"), check (report only when a rule is broken), and an explicit output format. This is a simple, single-purpose review skill, so the simple-skill exception applies and no validation checkpoints are required; it is not the missing-validation case of anchor 4.

Progressive Disclosure

The skill is under 50 lines with no bundle files (no references/, scripts/, or assets/ exist) and no need for external references; the rules are appropriately inlined and organized under "Rules" and "Stay quiet on" headings. Per the rubric's simple-skill guidance this matches anchor 5, with no buried or nested references as in lower anchors.

Specificity

The description names the domain and one concrete, well-scoped action ("Review changes to carnival games against the house rules in AGENTS.md") with precise paths, but lists only a single composite action rather than several, matching the anchor for domain plus 1-2 concrete actions that are not comprehensive. It falls short of anchor 4, which requires several specific actions, and is well above anchor 2, whose actions are generic.

Completeness

Both parts are explicit: the what is "Review changes to carnival games against the house rules in AGENTS.md" and the when is the concrete trigger phrase "Use on pull requests that add or change a game under src/games/". This matches anchor 5 (clear and explicit what AND when with concrete triggers) and exceeds anchor 4, whose when-clause is less specific.

Trigger Term Quality

"pull requests", "add or change a game", and "src/games/" are natural phrases a user would say when they need this skill, giving good keyword coverage. It stops short of anchor 5 because common synonyms and variations (e.g. "PR", "new game", "game folder") are absent.

Distinctiveness Conflict Risk

The description carves out a clear niche (carnival games, house rules in AGENTS.md, pull requests touching src/games/) with distinct triggers, so it is unlikely to fire for unrelated skills. It matches anchor 5; there is no meaningful overlap risk with closely related skills as in anchor 4.