Conciseness

The body is lean and operational throughout: exact CLI invocations with JSON payloads, terse 'Assert:' lines, and no explanations of concepts Claude already knows. Sections like 'Known Issues & Workarounds' carry non-obvious, project-specific facts ('PhysicsManipulation is automatically removed after forces are applied in a single frame'), so every token earns its place. A 4 would require some over-explanation to trim, which is absent.

Actionability

Every instruction is a copy-paste-ready command such as `npx @iwsdk/cli ecs step --input-json '{"count":50}'`, with explicit assertions on the expected JSON output fields (e.g. 'state: "DYNAMIC"', '_engineBody: > 0'). Placeholders like <sphere> are defined in the setup step ('Save the entity named Dynamic Sphere as <sphere>'), and edge cases (SKIP for no static body) are handled. This matches the fully-executable anchor.

Workflow Clarity

A five-step sequence (install, dev server, connectivity check, suites, cleanup) with explicit validation checkpoints: connectivity failure branches to 'report FAIL for all suites and skip to Step 5', each test has 'Assert:' lines, and a Recovery section provides a validate-restart-retry feedback loop bounded by 'Only give up after one retry attempt per suite.' This matches the anchor with explicit validation steps and error-recovery feedback loops.

Progressive Disclosure

No bundle files (references/, scripts/, assets/) exist; the entire skill is a single ~300-line SKILL.md. It is well-sectioned with clear headers (per-suite '### Suite N' sections, Recovery, Known Issues), so navigation is easy and there are no nested or buried references — above the 'some structure' anchor of 3. It falls short of 5 only because content that could live in separate reference files (e.g., the detailed component-registration assertions in Suite 4 and the Known Issues section) is inlined in the main file.

Specificity

The description names concrete capabilities — 'Test Havok physics system (gravity, rigid bodies, static vs dynamic) against the physics example using the iwsdk CLI' — listing several specific test areas plus the tool used. It falls short of a 5 because it doesn't comprehensively state what testing involves (assertions, suites, reporting), and is above 3 because more than 1-2 concrete actions are explicitly named.

Completeness

The 'what' is clear (test the Havok physics system's gravity, rigid bodies, static vs dynamic behavior against the physics example), but there is no 'Use when...' clause or equivalent trigger guidance, which per the rubric caps completeness at 3. It is not a 4 because the 'when' is entirely absent rather than merely implicit.

Trigger Term Quality

Natural terms users would say are present: 'physics', 'gravity', 'rigid bodies', 'static vs dynamic', 'physics example'. Not a 5 because there are no synonyms or variations (e.g., 'physics testing', 'collision', 'Havok simulation') beyond the single phrasing; not a 3 because coverage of the domain's natural vocabulary is genuinely good rather than partial.

Distinctiveness Conflict Risk

The combination of 'Havok physics system', 'the physics example', and 'the iwsdk CLI' carves out a clear niche with minimal overlap risk against other skills. A 4 would require some minor overlap with closely related skills, which is not the case here.