The body is dense and mostly efficient, but ~600 lines long with redundancy — e.g., the rationalization-excuses table appears twice (the "跳过测试的常见合理化借口" table and the "构建合理化借口表" example) and the "铁律" is stated in its own section then restated in the summary — matching 'mostly efficient but includes some unnecessary explanation or could be tightened'. Not level 1 because it frames TDD for a novel application rather than restating known concepts, and not level 3 due to the repetition and length.

It provides concrete, copy-paste-ready guidance: the TDD-mapping table, before/after YAML description examples, the "技能创建清单" with explicit checkboxes, and runnable commands like "./render-graphs.js ../some-skill --combine" and "wc -w skills/path/SKILL.md". This matches 'fully executable code/commands; specific examples; copy-paste ready'.

The red-green-refactor process is clearly sequenced with explicit validation checkpoints — "用技能运行场景 - 验证智能体现在遵守" and "重新测试直到无懈可击" form a validate→fix→retry feedback loop, and the checklist breaks it into red→green→refactor phases. This matches 'clear sequence with explicit validation steps; feedback loops for error recovery; checklists'.

References are one-level-deep and clearly signaled (e.g., "参见 persuasion-principles.md 了解研究基础", "参见 @testing-skills-with-subagents.md"), but the body is a ~600-line monolithic document with content (CSO details, rationalization tables) that could be split, and the referenced bundle files (anthropic-best-practices.md, graphviz-conventions.dot, render-graphs.js, testing-skills-with-subagents.md, persuasion-principles.md) do not exist in any references/scripts/assets directory, breaking navigation. Not level 1 because references are not nested 2+ levels and sections are headed, and not level 3 because of the monolithic length and broken external links.

Names the domain and three actions — "创建新技能、编辑现有技能…验证技能是否有效" (create, edit, verify) — but these are generic verbs rather than concrete technical mechanisms, matching the anchor 'names domain and some actions, but not comprehensive'. It is not level 3 because no multiple specific concrete actions (like 'extract text, fill forms, merge') are listed, and not level 1 because real actions are named.

It has an explicit "当…时使用" (Use when) trigger clause answering 'when', but 'what' is only implied through those trigger contexts, so what and when collapse rather than being clearly distinct. Not level 3 because it lacks a distinct statement of what the skill does alongside the trigger, and not level 1 because an explicit trigger clause is present.

Contains natural trigger terms a user would say — "创建新技能", "编辑现有技能", "验证", "部署前" — but the vocabulary is thin with no synonyms or variations, matching 'some relevant keywords but missing common variations'. Not level 3 because coverage is not rich, and not level 1 because the terms are natural rather than jargon.

It is scoped to a clear niche — skill authoring/deployment ("技能…部署前验证") — with distinct triggers unlikely to fire for unrelated skills. Not level 2 because the repeated "技能" framing makes it more distinct than 'works with document files', and level 1 would require generic phrasing like 'helps with code and documents'.