Conciseness

The body is dense and project-specific throughout (exact key names, exclusion regexes, gotchas) and assumes Claude's competence, but a few spots could be trimmed, and time-sensitive details like 'currently 6 horizon + 1 rising' and the old '1.1' default are not isolated in an old-patterns/deprecated section. Not 5 for those minor over-explanations; well above 3 since nothing explains concepts Claude already knows.

Actionability

Guidance is fully executable: copy-paste JS for relative panel positions and legacy-read compatibility, exact commands ('node tools/check.js', 'node tools/smoke-static.js'), exact keys, regexes, file paths, and function names covering the common cases. Not 4: there is no pseudocode and no missing key detail for the workflows it describes.

Workflow Clarity

The defaults pipeline is a numbered 5-step dev-to-users sequence, and the Validation section is an explicit 4-step checklist with commands and both clean-localStorage and existing-localStorage outcomes — a real feedback checkpoint for a write-and-ship operation. Not 4: validation steps are explicit rather than implicit, satisfying the destructive/batch cap concern.

Progressive Disclosure

The body has good section headers but is ~280 lines with everything inline and no bundle files; clearly separable material (audio system details, Tinyverse feature flags, cloud sync) sits in one file rather than one-level-deep references. Not 2 because structure is far from minimal and navigation via headers is easy; not 4 because content that should be split out is not, and the skill exceeds the simple-skill exception (under 50 lines).

Specificity

The description lists multiple concrete coverage areas ('settings defaults, audio, camera/orbit, panel positions, feature flags') plus a specific pipeline ('snapshots localStorage into tinyworld-defaults.json'), matching the comprehensive anchor. However, the first-person aside 'has burned us twice' violates the third-person voice guideline, reducing specificity by 1.

Completeness

It explicitly answers both: what it covers ('persisted user state — settings defaults, audio, camera/orbit, panel positions, feature flags, and the in-app "Save Defaults" pipeline') and when to use it ('Use when adding or changing persisted user state') with concrete trigger phrases. Not 4, because the 'when' clause is explicit and specific rather than merely present.

Trigger Term Quality

Natural trigger terms a user would actually say are comprehensively covered — 'settings defaults', 'audio', 'camera/orbit', 'panel positions', 'feature flags', 'Save Defaults', 'localStorage', 'tinyworld-defaults.json' — including synonyms and a concrete file name. Not below 5: no common variation for this domain is missing; not applicable above 5.

Distinctiveness Conflict Risk

It occupies a clear niche (tinyworld persisted runtime state) anchored by project-specific artifacts ('tinyworld-defaults.json', 'Save Defaults pipeline'), so it is unlikely to trigger for the wrong skill. Not 4: no meaningful overlap with adjacent skills is left open.