Conciseness

The body is efficient and assumes Claude's competence — no explanations of what GSAP/Lottie/Three.js are, and the routing table and runtime picker are dense signal. The one trimmable spot: the Critical Constraints section says "Don't restate the full contract here" and then immediately summarizes ~8 core rules in a parenthetical ("single paused timeline, `data-duration` governs length, no `Math.random` / `Date.now` / `performance.now`, no `repeat: -1`..."). Minor over-explanation that could be trimmed (4 anchor), but the rest is lean enough that it is not the noticeably-verbose 3.

Actionability

Mostly executable guidance: a copy-paste-ready bash command for the audit script, precise do/don't constraints ("never derive positions from `getBoundingClientRect()` at tween time"; "never `width` / `height` / `top` / `left` for layout changes"; "Spatial motion uses GSAP transform aliases only"), and a concrete default workflow ("Pick 2-4 rules from `rules-index.md`, glue them together with a single paused GSAP timeline, done"). The minor gap: no inline minimal example of the default compose-rules-into-a-timeline step — the "glue them together" step is left entirely to `hyperframes-core` and the rule files, so the most common case has no worked snippet (4 anchor, not 5).

Workflow Clarity

Clear decision structure: an explicit default path (compose atomic rules), explicit deviation criteria ("Load a blueprint when — The scene matches an existing pre-designed multi-phase template..."), a routing table keyed by intent, and an explicit post-authoring validation step ("Use it to audit choreography (dead zones, stagger consistency, lifecycle warnings) after authoring"). Not 5 because there is no error-recovery feedback loop — what to do when the audit or `hyperframes lint/check` flags issues (fix and re-audit) is left implicit, and lint/check integration appears only in See Also; not 3 because checkpoints are present and the sequence is unambiguous.

Progressive Disclosure

The SKILL.md itself is a model router — a well-signaled routing table, "Do not read it speculatively; load it when you've already decided", and bulk detail correctly kept out of the overview. However, scored against the actual bundle: of the ~20 referenced destinations (`rules-index.md`, `rules/<name>.md`, `blueprints-index.md`, `blueprints/<id>.md`, `transitions/overview.md`, `transitions/catalog.md`, `techniques.md`, and ~11 `adapters/*.md` files), only `references/motion-blur.md` (verified substantive, 133 lines, one level deep, no nested references) and `scripts/animation-map.mjs` actually exist. Most routes dead-end in the provided bundle, which is more than the "minor organization gaps" of the 4 anchor; the strong in-file structure keeps it above 3's "references not clearly signaled" framing only because the signaling itself is excellent — the delivery is not.

Specificity

The description enumerates concrete capabilities — "atomic motion rules, multi-phase scene blueprints, scene transitions, broader motion-design techniques", "the seven runtime adapters (GSAP default, plus Lottie, Three.js, Anime.js, CSS keyframes, Web Animations API, TypeGPU)", "pick 2-4 rules and compose, or load a blueprint, or look up runtime-specific API", and "auditing an existing composition's choreography (animation map) and 24 named text-animation effects" — comprehensive coverage matching the 5 anchor ("multiple specific concrete actions; comprehensive coverage"), with no vague filler.

Completeness

Both questions are answered explicitly: the what ("All animation knowledge for HyperFrames — atomic motion rules, multi-phase scene blueprints, scene transitions... AND the seven runtime adapters") and the when ("Use for any motion or animation task: pick 2-4 rules and compose, or load a blueprint, or look up runtime-specific API (e.g. GSAP eases / Lottie player / Three.js mixer)") with concrete trigger phrases, exactly matching the 5 anchor.

Trigger Term Quality

Natural user terms are comprehensively covered with synonyms — "any motion or animation task" (motion/animation), "choreography", "text-animation" — plus the exact runtime names users would mention ("GSAP eases / Lottie player / Three.js mixer", Anime.js, CSS keyframes, Web Animations API, TypeGPU). This matches the 5 anchor's synonym-level coverage; file extensions are not applicable in this domain.

Distinctiveness Conflict Risk

The description is well-scoped ("All animation knowledge for HyperFrames", "HyperFrames-native: single paused timeline, seek-safe, deterministic") with distinct triggers (runtime adapters, animation map, choreography audit), but "broader motion-design techniques" can overlap sibling creative-direction skills without any explicit boundary in the description itself — mostly distinct with minor overlap risk (4 anchor), not a fully clear niche since no delineation from sibling skills is stated (not 5).