Conciseness

The body is dense and functional — tables of commands, config fields with defaults, and hard-error lists — and assumes competence (never explains what FFmpeg or keying is). It is not level 5 because of minor fat: the opening paragraph largely restates the frontmatter description, and the right-to-left direction is emphasized four times (intro, config table, craft rules, output). It is clearly above level 3, which requires 'some unnecessary explanation'.

Actionability

Fully executable throughout: exact invocations ('python3 $S/build_hand_swipe_listicle.py config.json --stills cards/'), curl commands with concrete URLs for the bundled clip and per-style TTFs, a copy-paste JSON payload written via heredoc, a config field table with defaults and aliases, a worked example (scripts/config.example.json — verified to exist), and enumerated hard errors. Matches the level-5 'copy-paste ready, covers the common cases' anchor.

Workflow Clarity

Clear sequence (gather inputs → choices → config → render --stills → full render → review) with explicit validation checkpoints and feedback loops: 'Render --stills first: it is instant and shows the title, colors and cutouts before the full render', hard-error and warning semantics, tuning guidance ('Raise green_margin if skin goes see-through; lower it if green fringe remains'), and a final review checklist with concrete pass criteria (hand opaque, finger up, title fits, labels crisp, slide direction, music to the end). Matches the level-5 anchor.

Progressive Disclosure

Good structure with well-organized sections and real, clearly referenced bundle files (scripts/config.example.json and scripts/build_hand_swipe_listicle.py, both present). It is not level 5 because everything instructional lives inline in this ~165-line SKILL.md: the 'Making the hand clip' and 'Making the music bed' sections are workflows belonging to other capabilities, and the long config/craft-rule reference could sit in a separate file, leaving the overview leaner. It is well above level 3, which requires references that are not clearly signaled or content badly misplaced.

Specificity

The description lists multiple specific concrete actions with comprehensive coverage: cutouts 'float on a flat flavor-matched color field', cards 'slide RIGHT-TO-LEFT', the hand clip is 'trimmed to its clean finger-up window, looped once per flavor, keyed with a green-dominance alpha key, scaled down and anchored at the bottom', plus 'optional end card and … instrumental music bed' and 'deterministic PIL plus FFmpeg assembly'. This matches the anchor 'Lists multiple specific concrete actions; comprehensive coverage' — it does not fit the level-4 anchor since no capability gaps remain for this niche.

Completeness

Both 'what' and 'when' are explicitly present: the 'what' is fully detailed, and the closing 'Use for the hand-swipe-flavor-listicle format' is an explicit trigger clause. It is not level 5 because that trigger is a single narrow phrase naming only the exact format — no broader or alternative trigger conditions ('when the user asks for a flavor listicle video / vertical product ad') as in the level-5 anchor; it is clearly above level 3 since the 'when' is not merely implied.

Trigger Term Quality

Good keyword coverage: 'hand-swipe flavor listicle', 'video', 'product cutouts', 'title', 'end card', 'music bed', 'green-screen hand'. It falls short of the level-5 anchor because natural synonyms and variations users might say are missing (e.g., 'vertical video', 'ad', 'promo', 'flavor showcase', '.mp4'), but it is well above level 3 ('some relevant keywords') since most domain terms a user would mention are present.

Distinctiveness Conflict Risk

A clear niche with distinct triggers: the uniquely named 'hand-swipe flavor listicle' format is unlike any generic skill, and the paid capabilities it mentions (create-video-fal, create-music-elevenlabs) are explicitly framed as input sources rather than as this skill's function. Minimal conflict risk — fits the level-5 anchor; it is far more distinct than the level-4 'minor overlap risk' example.