Conciseness

Mostly efficient — the per-attribute tables, pitfall callouts ("Newline Escaping"), and validation rules earn their tokens since the JSON Canvas spec is niche enough that Claude cannot be assumed to know it. But the four full "Complete Examples" (~300 lines of JSON) are repetitive padding beyond what the common cases need, matching anchor 3 (mostly efficient but could be tightened) rather than anchor 4's minor-trim level.

Actionability

Fully executable guidance: complete, copy-paste-ready JSON for every node type (text/file/link/group), edges, and colors, plus four whole-canvas examples spanning mind maps, Kanban boards, research canvases, and flowcharts. Validation Rules give 8 concrete checks. This matches anchor 5 (copy-paste ready, specific examples covering the common cases); nothing here is pseudocode or abstract.

Workflow Clarity

For a single-task reference skill (write spec-conformant .canvas JSON), the action is unambiguous, and the "Validation Rules" section supplies 8 explicit checkpoints. It sits at anchor 4 rather than 5 because there is no feedback loop (validate -> fix -> re-check) and no explicit generation sequence (e.g. plan layout -> assign unique IDs -> connect -> validate), only a rules list; not below 4 since the task is not destructive/batch and the steps that do exist are clear.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), so everything — including ~300 lines of full example canvases and the complete spec tables — is inlined in SKILL.md. Section headers keep it navigable (ruling out anchor 2's headerless inline blob), but the Complete Examples and exhaustive attribute tables clearly belong in separate reference files, matching anchor 3 (content that should be separate is inline). Not anchor 4: the split-out is not 'minor', it is the bulk of the file.

Specificity

The description names concrete actions — "自动生成标准.canvas文件" (auto-generate standard .canvas files) and "精准配置节点、连线与层级" (precisely configure nodes, edges, hierarchy) — but coverage stops at two actions, and the tail is pure marketing fluff ("一键生成完美排版，彻底告别手写JSON的繁琐与报错") that adds no capability. This matches anchor 3 (names domain and 1-2 concrete actions, not comprehensive) better than anchor 4, which expects several specific actions with only minor gaps.

Completeness

Both parts are present: an explicit 'when' clause ("当需要创建思维导图、流程图等可视化画布时" — when you need to create mind maps/flowcharts) and a 'what' (generate .canvas files, configure nodes/edges/hierarchy). It falls short of anchor 5 because the 'what' is diluted by over-claim padding ("一键生成完美排版，彻底告别…报错") rather than stating capabilities plainly; it is above anchor 3 since the 'when' is explicit, not weakly implied.

Trigger Term Quality

Good natural-keyword coverage: users would plausibly say "Obsidian知识库", "思维导图" (mind map), "流程图" (flowchart), "可视化画布" (visual canvas), and the file extension ".canvas" is included. A few common variations are missing (e.g. "白板"/whiteboard, "diagram", "节点图"), keeping it at anchor 4 rather than anchor 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

The niche is clear — Obsidian .canvas files — and "构建Obsidian知识库" anchors it firmly, but the generic trigger words "思维导图、流程图" (mind map, flowchart) create minor overlap risk with general diagramming skills (e.g. Mermaid/draw.io helpers). Anchor 4 (mostly distinct, minor overlap with closely related skills) fits better than anchor 5's minimal-conflict niche.