Conciseness

The 31-line body is lean and assumes competence: executable commands, no explanation of what TTS or ElevenLabs is, and every sentence carries non-obvious operational policy (proxy billing, phonetic-spelling rule, persistence re-read, dry run before spending). Not score 4 because there is no padded or over-explained passage to trim — apparent repetition (the captions-keep-written-name rule) is deliberate emphasis in two different contexts.

Actionability

The primary and pronunciation flows are fully executable — 'gen_vo.py --text "Meet Drinkag1." --voice <id> --out vo.mp3 --rules working/brand-rules.json' and '--say-as "Drinkag1=drink A G one"' (both verified against the bundled script) — but key details are missing elsewhere: the timestamp feature is described only as 'Use the timestamp option' without naming the actual flag (--with-timestamps) or giving an invocation, no command line is shown for the bundled read_pronunciations.py, and 'See the bundled timestamp tests for the request and output contract' points to a file that does not exist in the bundle. This lands at 'concrete guidance but incomplete / missing key details' rather than score 4's 'minor gaps'.

Workflow Clarity

The risky paid-call workflow is well sequenced with explicit checkpoints: read fresh brand facts at the start ('A previous video's notes or a cached rules file do not establish current pronunciation'), resolve before 'the paid voice step', 'Save the user's confirmed choice... then make a separate read and confirm it survived', a free dry run to review spoken text, and 'A missing alignment is an error; do not render captions from guessed timings'. Not score 5 because the sequence lives in prose sections rather than an explicit ordered flow with error-recovery loops; validation is present, so the missing-validation cap at 3 does not apply.

Progressive Disclosure

A sub-50-line skill with no external reference files needed, organized into three well-labeled sections, and the bundled scripts it names (gen_vo.py, read_pronunciations.py, media_proxy) all exist. It falls short of 5 because one reference is dangling: 'See the bundled timestamp tests' — no test file ships in scripts/ (only gen_vo.py, media_proxy.py, read_pronunciations.py), so that navigation target fails against the actual bundle structure.

Specificity

Names the domain and a concrete action — 'Generate a voiceover (VO) clip via ElevenLabs text-to-speech, ROUTED THROUGH THE elevenlabs-proxy' — plus the sourcing detail 'Voice id + script text come from the template recipe', but only 1-2 concrete actions are listed, not a comprehensive set (no mention of timestamped output, pronunciation handling, or dry runs). It is above score 2 because the action is specific and instrumented (proxy routing for Ads-agent billing), not generic, and below score 4 because it does not enumerate several specific capabilities.

Completeness

Explicitly answers both: what — 'Generate a voiceover (VO) clip via ElevenLabs text-to-speech' routed through the proxy — and when — 'Use for the spoken narration of VO-driven video-ad formats (cgi-app-sizzle, flat-vector-explainer, hypermotion)', a concrete 'Use for...' trigger clause. It also adds an explicit boundary ('Never call ElevenLabs directly'). This matches the score 5 anchor with concrete trigger phrases, not merely the weaker 'when' of score 4.

Trigger Term Quality

Good natural keyword coverage: 'voiceover', 'VO clip', 'ElevenLabs', 'text-to-speech', 'spoken narration', 'video-ad formats', plus named formats (cgi-app-sizzle, flat-vector-explainer, hypermotion). A few natural terms a user might say are missing, e.g. 'TTS', 'voice-over', 'narration audio', so it falls short of the comprehensive synonym/extension coverage of score 5.

Distinctiveness Conflict Risk

Clear niche — VO generation for specific video-ad formats, exclusively via the elevenlabs-proxy with required attribution — with distinct named triggers. The explicit 'Never call ElevenLabs directly' boundary further separates it from any generic TTS skill, giving minimal conflict risk per the score 5 anchor.