The body is dense and prescriptive with no padding or explanation of concepts Claude already knows (no definition of Three.js, rigs, or LOD), so every token earns its place per the 'lean and efficient' anchor; it is not level 2 because there is no unnecessary explanation to trim.

Guidance is concrete and specific — enumerated fields ('stable ID, AI tags, eligibility range/angle/line-of-sight, weight'), explicit rules ('Reject duplicate IDs, missing references, invalid ranges') — but no worked example of an actual enemy definition or move data structure is shown, leaving key details missing per the 'some concrete guidance but incomplete' anchor.

The 'Add a new enemy' section is a clearly sequenced 5-step process with decision branches and an explicit validation step ('Validate references, timing, contact, cooldown, recovery, interrupts, and feedback hooks'), and 'Prove the system' provides a testing checklist, matching the 'clear sequence with explicit validation steps' anchor.

No bundle files exist and the content is a compact, well-sectioned single file with clear ## headers and no nested references, so per the simple-skill scoring note well-organized sections earn the top score; it is not level 2 because nothing that should be split out is inlined.

Lists many concrete actions and artifacts — 'Build or refactor reusable, data-driven enemy archetype and moveset systems', 'content schemas, model and rig conventions, combat move timing and contact contracts' — matching the 'lists multiple specific concrete actions' anchor rather than the partial level 2.

Explicitly answers what ('Build or refactor reusable, data-driven enemy archetype and moveset systems') and when ('Use for enemy content schemas... production playthrough validation'), satisfying the explicit-trigger anchor; it is not level 2 because the 'Use for' trigger clause is present.

Relevant keywords exist ('Three.js action games', 'enemy archetype', 'moveset', 'combat move timing') but several triggers are internal jargon ('contact contracts', 'runtime state boundaries', 'deterministic fixtures') and common user variations like 'enemy AI', 'NPC', or 'boss' are absent, matching 'some relevant keywords but missing common variations'.

The niche is sharply bounded — enemy systems for Three.js action games — with domain-specific triggers unlikely to fire for unrelated skills, matching the 'clear niche with distinct triggers' anchor.