Conciseness

Dense and opinionated with no padding of concepts Claude already knows; quantified rules and good/bad narration examples earn their place. A few rhetorical framing lines ("Density is a feature here: a lecture page that says one thing is a wasted page") could be trimmed, so it is efficient rather than maximally lean.

Actionability

Gives concrete API calls (generate_scene, set_roster, create_stage), named fields (brief, materialFacts, voiceDesign.delivery), and quantified thresholds (4–6 keyPoints, 3–5 pages per arc, ≤1 interactive page, one quiz per 4–5 pages) plus copy-ready example briefs. It is instruction-only so there is no executable code, and a complete worked generate_scene call is not shown, keeping it at 4 rather than 5.

Workflow Clarity

A clear generation sequence is present — plan in conversation, then create_stage, then one generate_scene per page with an explicit brief, with page content and narration written by separate calls. Validation checkpoints are implicit, but this is a design skill rather than a destructive/batch operation, so the missing-feedback-loop cap does not apply.

Progressive Disclosure

No bundle files exist; the single SKILL.md is well-organized with clear section headers (The shape, Page density, Narration, The roster, Carrying the style into the generators, Scene naming) and no inlined content that belongs in a separate file. Because it exceeds 50 lines, the simple-skill 5-exception does not strictly apply, so it sits at 4.

Specificity

Lists several concrete output characteristics — "one continuous explanation carried by slides", "dense pages", "long narration that builds an argument across several real cases", "checkpoints that are rare and deliberate" — but these are descriptive qualities of the deliverable rather than a comprehensive action-verb list, so it sits at 4 rather than 5.

Completeness

Explicitly answers both what ("Masterclass lecturing — one continuous explanation carried by slides…") and when ("Use when the ask is a lecture, a masterclass… or any topic whose payoff is understanding rather than practice") with concrete trigger phrases and negative boundary guidance.

Trigger Term Quality

Good natural-term coverage with English synonyms ("lecture", "masterclass", "systematic walkthrough") and Chinese variants (「大师课」「系统讲解」「讲透」) plus a "names this style" catch-all; a few natural phrasings could still be missing, so not a 5.

Distinctiveness Conflict Risk

Occupies a clear niche (masterclass lecture design) and explicitly disambiguates from sibling skills — "Not for hands-on training (that is `workshop-style`) and not for a course whose point is manipulating a mechanism (that is `deep-interactive`)", minimizing conflict risk.