Conciseness

The body is dense with proprietary domain knowledge Claude cannot know (customFootprint ranges, tower count profiles, token-to-kind mappings, exact npm commands), so most tokens earn their place. However, several entries in the random-island section read as changelog narration ('Resource placement now starts with...', 'is now versioned in...') and could be tightened, matching anchor 4's 'minor instances of over-explanation that could be trimmed'.

Actionability

Guidance is highly concrete for an instruction-only skill: exact mappings ('watchtower/castle -> kind:"house" with buildingType:"tower"'), parameter ranges ('customFootprint around 1.1-1.3... reserve 1.5-1.8'), runnable commands ('npm run stats:random-island -- --samples=10000'), and worked decompositions (skate park, market, playground, quarry). It stops short of anchor 5 because it demands 'strictly machine-parseable JSON matching the schema' without ever showing an example cell or the schema itself.

Workflow Clarity

The body is organized as parallel principle lists rather than a sequenced workflow; ordering is only implicit except in fragments ('Put rivers or lakes down first, carve/extend path roads next, then place water-bridge only when...'). Validation is mentioned ('final validation repairs any displaced floors') but there are no explicit checkpoints or feedback loops for the generation/save pipeline, matching anchor 3's 'sequence present but checkpoints missing or implicit'.

Progressive Disclosure

Section headers exist (Prompt principles, Primitive assembly, Voxel stamp, Auto suggestions, Offline random island generation) giving some structure, but the ~90-line offline-generation section is design-note detail that clearly belongs in a separate reference file, and the one external pointer ('docs/random-island-generation-assets.md') is buried mid-paragraph rather than clearly signaled. This matches anchor 3: 'some structure but... content that should be separate is inline'.

Specificity

The description names a concrete domain and several specific target surfaces ("editing Tiny World Builder prompts, model-generated worlds, Auto suggestions"), but the only action verb is "editing" — it does not list multiple concrete actions like anchor 4 or 5 require. It sits above anchor 2 ('Processes PDF files'-level genericness) because the target surfaces are specific, but below anchor 4 because coverage of actions is thin.

Completeness

The 'when' is explicit and rich ("Use when editing... or any model behavior that should create coherent low-poly 3D board scenes"), but the 'what' is only implied through the trigger list — the skill's actual purpose (authoring/guiding prompts that produce coherent low-poly scenes) is never stated as a capability. It cannot reach anchor 4 (both what and when present), but the trigger clause conveys more substance than anchor 2's 'only when, without what' vagueness.

Trigger Term Quality

Natural terms a user of this app would say are well covered: "Tiny World Builder", "Auto suggestions", "low-poly 3D board scenes", "model-generated worlds". It falls short of anchor 5's comprehensive synonym/extension coverage (e.g., no 'world generation', 'diororama', or Generate-dialog phrasing), but is clearly above anchor 3's partial coverage.

Distinctiveness Conflict Risk

Triggers are highly product-specific ("Tiny World Builder", "Auto suggestions", "low-poly 3D board scenes"), giving this skill a clear niche with minimal overlap risk against generic skills. It matches anchor 5's 'clear niche with distinct triggers'.