Conciseness

The body is lean and assumes Claude's competence — no basic-concept explanations — with every section (principles, anti-patterns, schema, workflow, constraints) earning its place. Minor trimmable redundancy keeps it below level 5: the "3-5 words" label guidance appears both in the schema comments and the Scaling section, and toolbar/inspector chrome rules repeat across Principles and Design Constraints.

Actionability

Fully executable guidance: complete copy-paste-ready data schemas with required/optional field annotations for both diagram types, exact edit markers ("Replace the DATA section (between // === DATA === and // === END DATA ===)" — both markers verified present in assets/sequence.html and assets/flowchart.html), concrete node shapes with dimensions, and a workflow pointing at real bundle files. Specific examples cover the common cases.

Workflow Clarity

The four-step workflow (determine type, read the template, replace the DATA section, write to target path) is a clear, unambiguous sequence with no gaps in ordering. It lacks any validation checkpoint (e.g., opening or sanity-checking the rendered artifact), matching the clear-sequence-with-minor-validation-gaps anchor rather than the explicit-feedback-loops anchor.

Progressive Disclosure

Well-organized overview with the bulk of the implementation correctly offloaded to one-level-deep bundle templates (assets/sequence.html, assets/flowchart.html) that exist and are clearly signaled in Workflow step 2. The only organization gap is that exact filenames are implicit ("the corresponding template from assets/") rather than named, leaving it just short of the fully clear-reference anchor.

Specificity

"Creates interactive HTML teaching materials with clickable state diagrams" names the domain and one concrete artifact but lists only a single action; it does not mention sequence/flowchart diagrams, detail panels, or the inspector interaction. This matches the anchor for domain plus 1-2 concrete actions without comprehensive coverage, and falls short of the several-specific-actions anchor above.

Completeness

Both "what" (creates interactive HTML teaching materials with clickable state diagrams) and "when" ("Use when the user asks to produce an explorable tutorial artifact, not to answer a question") are explicit, with a helpful negative discriminator. The "what" is a single action and the trigger phrase "explorable tutorial artifact" is somewhat abstract, so it sits at the both-present-but-could-be-more-specific anchor rather than the fully concrete one.

Trigger Term Quality

Includes natural phrases users would say — "interactive", "teaching materials", "tutorial", "explorable", "state diagrams" — giving good keyword coverage. It is not level 5 because common variations like "interactive diagram", "clickable flowchart", or "explainer" are missing.

Distinctiveness Conflict Risk

The description carves a clear niche (interactive, clickable, explorable) with minimal conflict risk, but "state diagrams" could still capture plain static-diagram requests that a Mermaid-style skill should serve; the boundary is only stated in the body, not the description. Mostly distinct with minor overlap risk against closely related diagram skills.