The Run and Contract sections are tight and earn their tokens, but the opening paragraph restates the frontmatter description verbatim, adding redundant context. Not a 3 because that duplicated paragraph means not every token earns its place; not a 1 because the rest is lean and free of concept explanations.

Provides a concrete, executable command with real flags — 'gen_music.py --prompt '...' --duration 10 --out music.m4a' — that matches the bundled script's actual argparse interface. Not a 2 because it is copy-paste ready with specific flags rather than pseudocode or vague direction.

This is a single-action skill and the one action (run gen_music.py) is unambiguous, which the rubric's simple-skill note allows to score 3. Not a 2 because there is no multi-step sequence to underspecify, and the operation is non-destructive so no validation checkpoint is required.

Under 50 lines with well-organized sections (Run, Contract) and one-level-deep references to real bundled files ('bundled media_proxy.py', gen_music.py), both verified present in ./scripts/. Not a 2 because references are clearly signaled and content is appropriately split rather than inlined.

Lists multiple concrete actions in third person — 'Generate an instrumental music bed', 'Trims any sparse intro, loudnorm, fades the tail' — matching the top anchor. Not a 2 because it enumerates several specific operations rather than naming only a domain and a couple of actions.

Explicitly answers both 'what' (generate, trim, loudnorm, fade) and 'when' via 'Use for the music layer of any video-ad format.' Not a 2 because the 'Use for...' trigger clause is present and explicit rather than merely implied.

Has relevant natural terms like 'instrumental music bed', 'music layer', and 'video-ad format', but is weighed down by technical jargon ('elevenlabs-proxy', 'loudnorm', 'bills the Ads agent') and lacks common user variations like 'background music'. Not a 3 because the jargon density crowds out the natural phrasing a user would actually say.

Occupies a clear niche — ElevenLabs music bed for video-ad formats — with distinct triggers unlikely to fire for unrelated skills. Not a 2 because the format-specific 'video-ad' scope and proxy routing make it clearly distinguishable.