Conciseness

The body is lean and imperative throughout — no explanation of what Three.js, ElevenLabs, or Web Audio is; every section (API key, Commands, Defaults, Recovery, Report) carries only operational guidance. Phrases like 'Keys never go in skill files, game code, or reports' and the compact Defaults list earn their tokens. It matches the 5 anchor (lean, assumes competence, every token earns its place); not 4 because there is no over-explanation to trim.

Actionability

Fully executable, copy-paste-ready commands are given for every subcommand (probe, sfx with --duration/--prompt-influence/--loop, music with --instrumental/--plan, tts, isolate, voice-change) with realistic prompts, output paths, and a concrete voice ID. Defaults quantify ranges ('mp3_44100_128', '0.5–2.5s', prompt influence '0.55–0.8'). This matches the 5 anchor (copy-paste ready, specific examples covering common cases); the only placeholder is <this-skill-dir>, which the file explicitly instructs how to resolve.

Workflow Clarity

Validation checkpoints are explicit — 'probe' printing 'ELEVENLABS_API_KEY=SET|MISSING', '--validate' calling 'GET /user', 'Listen to a representative effect or line before generating a batch', and 'Test it through its real game event' — and the Recovery section distinguishes credential, credit, and transient failure classes before retry. This fits the 4 anchor (clear sequence with most checkpoints) rather than 5 because the end-to-end order (probe → generate → integrate → QA → report) is implied by section order rather than laid out as an explicit sequence, leaving minor gaps for a first-time run.

Progressive Disclosure

The body is a genuine overview: commands, defaults, and coordination guidance inline, with details (prompt patterns, music/voice strategy, runtime failure modes) split into a single, clearly signaled reference — 'references/audio-workflows.md — the audio matrix, prompt patterns... Read it before planning a game's audio'. Verified against the bundle: that file exists and is one level deep (no nested references), and scripts/threejs_audio_asset.py backs the commands. This matches the 5 anchor (clear overview, well-signaled one-level-deep references, easy navigation).

Specificity

The description enumerates many concrete actions — 'Generate, convert, clean, and integrate audio', 'sound effects, looping ambience, music tracks and loops', 'announcer and dialogue TTS, voice conversion from a scratch performance, voice cleanup, audio manifests, and Web Audio integration' — comprehensively covering the skill's capability space. It matches the 5 anchor (multiple specific concrete actions, comprehensive coverage); minor redundancy ('boss stingers' appears under both music and creature audio) does not reduce coverage.

Completeness

The 'what' is clearly and comprehensively stated, but there is no 'Use when...' clause or equivalent explicit trigger guidance — per the judging guidelines this caps completeness at 3 ('when' is only weakly implied by 'for Three.js browser games'). Not 4 because the when-to-use context must be inferred from the domain framing, not read from an explicit trigger phrase.

Trigger Term Quality

Natural terms users would say are present: 'audio', 'sound effects', 'music tracks and loops', 'ambience', 'voice', 'TTS', 'cleanup', 'Web Audio', plus provider/domain names 'ElevenLabs' and 'Three.js'. This fits the 4 anchor (good coverage, a few natural terms missing) rather than 5 because common synonyms like 'SFX', 'background music', 'foley', and 'voice lines' are absent.

Distinctiveness Conflict Risk

'for Three.js browser games with ElevenLabs' pins a clear niche with distinct triggers, but the action list (TTS, voice cleanup, voice conversion) overlaps with a generic ElevenLabs/TTS or game-asset skill. This fits the 4 anchor (mostly distinct; minor overlap risk with closely related skills) better than 5, since generic audio/TTS requests could plausibly match multiple skills.