Conciseness

The body is almost entirely dense attribute tables, JSON snippets, and non-obvious pitfalls ("Use \n for line breaks in JSON strings. Do not use the literal \\n", "Preset color values are intentionally undefined -- applications use their own brand colors") with virtually no padded prose or explanation of concepts Claude already knows. This is niche spec knowledge Claude does not have, so every token earns its place.

Actionability

Every node and edge type has a complete, copy-paste-ready JSON example, and the attribute tables give exact types, defaults, and allowed values (e.g., "fromEnd | No | string | none | none or arrow"). ID generation is specified with concrete samples ("6f0ad84f44ce9c17"), covering the common cases fully.

Workflow Clarity

Four workflows are clearly sequenced, each ending with an explicit bolded **Validate** step, plus an 8-item Validation Checklist and error-recovery guidance ("If validation fails, check for duplicate IDs, dangling edge references, or malformed JSON strings"). This matches the anchor-5 feedback-loop pattern.

Progressive Disclosure

The body is well-sectioned and points to a real, one-level-deep reference ("See [references/EXAMPLES.md](references/EXAMPLES.md) for full canvas examples including mind maps, project boards, research canvases, and flowcharts") that exists and contains no nested references. However, nearly the entire attribute/spec reference is inlined in SKILL.md with only one external file, so bulk reference content could arguably be split out; this sits between anchors 4 and 5.

Specificity

"Create and edit JSON Canvas files (.canvas) with nodes, edges, groups, and connections" names the domain plus several concrete actions and the objects they apply to. It falls short of a 5 because only two verbs (create, edit) are given rather than comprehensive action coverage.

Completeness

It explicitly answers both questions: what ("Create and edit JSON Canvas files (.canvas) with nodes, edges, groups, and connections") and when ("Use when working with .canvas files... or when the user mentions Canvas files in Obsidian"). This matches the anchor-5 example structure almost exactly.

Trigger Term Quality

"Use when working with .canvas files, creating visual canvases, mind maps, flowcharts, or when the user mentions Canvas files in Obsidian" covers the file extension, synonyms (mind maps, flowcharts), the product name, and natural phrasings users would say.

Distinctiveness Conflict Risk

JSON Canvas/.canvas is a clear niche anchored by the Obsidian mention, giving minimal conflict risk. However, generic triggers like "mind maps" and "flowcharts" create minor overlap with general diagramming skills, so it sits between anchors 4 and 5, closer to 4.