Conciseness

The ~35-line body has no padding or general-concept explanation: the short intro carries non-inferable project facts ("Agents read these docs before they work", "the factory ships the fixes"), and the "What to check" / "What to file" sections are entirely task-specific. Every token earns its place, matching the lean-and-efficient anchor rather than the minor-over-explanation 4 anchor.

Actionability

Guidance is fully concrete and copy-paste ready: the title template "Docs: <file> is out of date", a line-pointer example "src/games/water-cannon/game.ts:12", per-doc-type check lists with specifics ("shot counts, speeds, points", "URL parameters, keys"), and a concrete "Done when" tied to "npm run check". As an instruction-only skill this matches the fully-executable top anchor; there is no pseudocode or vague direction.

Workflow Clarity

A clear two-phase sequence (audit each doc's claims, then file) with explicit validation checkpoints for a batch operation: duplicate guard ("Before filing, check the open issues and skip any doc that already has one"), command verification ("Run commands like npm run check if you need to confirm one works"), and the edge case "Nothing found is a fine result. Say so, and file nothing." The batch-operation cap does not apply because verification steps are present, so this matches the top anchor rather than the minor-validation-gaps 4 anchor.

Progressive Disclosure

The skill is under 50 lines with no external references needed and no bundle files present; the two well-organized sections ("What to check", "What to file") plus a brief purpose intro satisfy the simple-skill criterion for the top score. The paths it cites (README.md, AGENTS.md, src/games/<game-id>/README.md, SKILL.md) are audit targets in the repo, not skill bundle references, so there are no dangling or buried references.

Specificity

Concrete actions are explicit: "Find docs and agent instructions in the carnival that no longer match the code", "file one GitHub issue per stale doc", plus the boundary "Files issues only; never changes code or docs" and the named target set (README, AGENTS.md, game READMEs, skills). This matches the anchor for multiple specific concrete actions with comprehensive coverage; it is not the 4 anchor because there are no minor gaps — actions, granularity, and boundaries are all stated.

Completeness

Explicitly answers both what ("Find docs... that no longer match the code, and file one GitHub issue per stale doc. Files issues only; never changes code or docs") and when ("Use when running the doc gardening maintenance loop, or when asked to check whether the README, AGENTS.md, a game's README or a skill is out of date") with concrete trigger phrases — a direct match to the top anchor.

Trigger Term Quality

Natural user phrases are all present: "out of date", "stale doc", "doc gardening maintenance loop", and concrete targets "README", "AGENTS.md", "a game's README or a skill". Synonyms (stale / out of date) and file names are both covered, matching the comprehensive-synonyms anchor rather than the "a few natural terms missing" 4 anchor.

Distinctiveness Conflict Risk

"Files issues only; never changes code or docs" cleanly separates it from doc-fixing, doc-writing, and code-review skills, and the triggers ("doc gardening maintenance loop", "check whether the README... is out of date") are niche-specific with minimal conflict risk, matching the clear-niche anchor.