Conciseness

The ~24-line body is lean and efficient: 'A HyperFrames-ready HTML + CSS + GSAP motion composition, bundled under `source/`. It renders deterministically to MP4 / WEBM at 16:9, 9:16, 1:1, default 15s, 60fps.' packs dense, non-obvious facts with zero padding. Every section (what it is, best-for, workflow, attribution) earns its place and assumes Claude's competence; not below 5 because nothing explains concepts Claude already knows.

Actionability

Some steps are concrete ('Read `source/index.html` to understand the named layers and the animation timeline'; 'Replace the sample copy... keep the motion timing and visual signature intact'), but the critical final step 'Render to MP4 via the html-video / HyperFrames renderer' provides no command, API call, or example — the key detail for producing the deliverable is missing. Anchor 3 (some concrete guidance but incomplete, missing key details); not 4 because the render gap is not minor, not 2 because three of four steps do give specific direction.

Workflow Clarity

The 4-step sequence is clearly ordered and coherent, but there are no validation or preview checkpoints ('Render to MP4' is the last step with no verify-output or error-recovery guidance). Per the rubric's anchor 3: 'Steps listed but validation gaps; sequence present but checkpoints missing or implicit' — not 4 because no checkpoints exist at all.

Progressive Disclosure

The body is well-sectioned and points one level deep to `source/` for detail ('A HyperFrames-ready... composition, bundled under `source/`'), which is appropriate structure. However, scored against the actual bundle structure, no bundle files exist — the referenced paths `source/` and `source/index.html` are absent from the bundle, so the overview points to material that cannot be navigated to. Anchor 3 (structure present but organization against real references falls short); not 2 because the body itself is cleanly structured and not a wall of text.

Specificity

The description names the domain ("HyperFrames motion video") and gives concrete visual specifics ("a red rule draws across, a giant tilted figure drops in, a three-line headline rises line-by-line"), but it describes the artifact rather than listing capabilities or actions the skill performs (e.g., rendering formats, aspect ratios, copy replacement). It sits at anchor 3: domain plus 1-2 concrete elements, not comprehensive coverage; not 4 because several specific actions are not enumerated, and not 2 because it is far more concrete than 'names the domain but actions are minimal'.

Completeness

Both parts are present: 'what' is the described motion composition ("a red rule draws across... an italic serif standfirst fades") and 'when' is explicit ("Use this plugin when the user wants a 'Bold Poster Frame' HyperFrames motion video"). Not 5 because the 'when' clause is somewhat circular (it triggers on the template's own name rather than user-intent phrases) and the 'what' omits what the plugin actually does (creates an HTML/CSS/GSAP composition, renders to MP4/WEBM).

Trigger Term Quality

Natural terms like "Bold Poster Frame", "HyperFrames motion video", "1970s European editorial poster", and "poster" give good keyword coverage a user would plausibly say. Not 5 because common variations such as "poster-style video", "title card", "kinetic typography", or file extensions are missing; not 3 because the coverage goes beyond 'some relevant keywords'.

Distinctiveness Conflict Risk

The niche template name ("Bold Poster Frame") and surface ("HyperFrames") make it mostly distinct with minimal conflict risk. Not 5 because sibling video templates in the same library would share the generic "HyperFrames motion video" trigger phrasing, creating minor overlap risk with closely related skills.