Conciseness

The body is dense and assumes competence (e.g., 'Bold weight and icon-centered-on-pill-middle are load-bearing', 're-encode crf23/maxrate12M'), with no explanation of concepts Claude already knows. It is not a 5 because the opening paragraph restates the frontmatter description almost verbatim and the 'Music coverage' section overlaps references/music.md, so a few tokens could be trimmed.

Actionability

The Run section gives exact commands with flags and paths ('fetch_icons.py --run-dir <run> ; build_overlays.py --config config.json --out-dir <run>/generated/overlays ; compose_master.py --config config.json --run-dir <run>') and the Contract pins concrete details (1080x1920, crf23/maxrate12M, Pillow + ffmpeg). It is not a 5 because the regression instruction 'Run the free regressions with python -m unittest discover -s tests -p test_*.py -v' points at a tests/ directory that does not exist in the bundle.

Workflow Clarity

The three-step pipeline (fetch icons -> build overlays -> compose master) is sequenced with the critical 'Always re-run build_overlays.py before compose_master.py' warning, and failure behavior plus remedies are documented ('composer... stops if copy does not fit; wrap the text or reduce its font size', 'build_overlays.py exits with a clear message if any of it is empty', music checks 'stops for missing, short or prematurely silent music'). It is not a 5 because validation is delegated to tool behavior and there is no explicit verification of the final master output.

Progressive Disclosure

The body is a well-organized overview with a clearly signaled, one-level-deep reference ('Read the [music preparation instructions](references/music.md)') that exists in the bundle, and each script gets a one-line role description. Content is appropriately split between SKILL.md, the reference, and the scripts, so navigation is easy.

Specificity

The description lists multiple concrete actions covering the whole pipeline: 'Build the deterministic PIL pill overlays', 'composite them onto a base clip in a diagonal L->R->L->R cascade', 'mux the music bed into master-final.mp4', plus config, resolution (1080x1920 9:16), and cost (FREE, no paid calls). Coverage is comprehensive, matching the anchor-5 example's breadth rather than the minor-gaps anchor 4.

Completeness

Both parts are explicitly answered: the 'what' is fully concrete (build overlays, composite, mux into master-final.mp4) and the 'when' is an explicit clause ('Use for the overlay-proof-points format; the base clip + music come from separate paid capabilities'). It is not a 5 because the when rests on a single narrow trigger phrase without user-side variations ('or when the user mentions...'), which the anchor-5 example includes; it is well above the vague-or-missing-when anchors.

Trigger Term Quality

Good natural keywords are present ('UGC video ad', 'proof pills', 'score header', 'music bed', 'overlay'), and the trigger 'Use for the overlay-proof-points format' names the invocation phrase. It is not a 5 because there are no synonyms or variations (e.g., 'text overlay', 'score badge', 'compositing') and much of the phrasing is internal jargon ('deterministic PIL', 'mux', 'L->R->L->R cascade'); it is clearly above anchor 3's partial coverage.

Distinctiveness Conflict Risk

It carves out a clear niche ('overlay-proof-points format') and explicitly draws the boundary against sibling capabilities ('the base clip + music come from separate paid capabilities'), so it is unlikely to trigger for the wrong skill. This matches anchor 5's 'clear niche with distinct triggers; minimal conflict risk' rather than anchor 4's residual overlap with closely related skills.