Conciseness

The body is dense and assumes Claude's competence—no preamble explaining what lessons or memory are—with every section carrying actionable discipline; a few rule sentences in the lifecycle/写入纪律 sections could be tightened slightly.

Actionability

Concrete guidance throughout: a grep retrieval command, a copy-ready lesson frontmatter template, a slug convention, file paths, and a numbered routing procedure; some guidance is conditional/rule-based rather than literal copy-paste, keeping it just below 5.

Workflow Clarity

A clear sequence (开工与授权 → 落点判断 → 格式 → 生命周期 → 写入纪律 → 检索 → 完成) with explicit validation gates ('没有可追溯证据不写', '晋升前先验证新 owner 已写入'), dedup/budget checks, and retirement feedback; minor gaps in explicit error-recovery loops keep it at 4.

Progressive Disclosure

Self-contained with no bundle files and well-organized sections that cohere for a single-purpose memory skill; at ~80 lines it slightly exceeds the under-50-line simple-skill exception, so it sits at 4 rather than 5 despite clean structure.

Specificity

Names the domain ('项目事实、lesson 生命周期与 canonical 归宿') and a few concrete functions, but the only action verb '管理' is generic and coverage of what it actually does (record, route, retire) is implied rather than enumerated.

Completeness

It has both a clear 'what' and an explicit 'when' via the '触发' clause with concrete triggers; the 'what' is moderately concrete but the verb is generic, keeping it just below a 5.

Trigger Term Quality

The '触发' clause lists natural phrases users would say ('踩坑','教训','调研结论','纠偏','记住这个'), giving good keyword coverage; a few synonyms (e.g. '经验','复盘') are absent.

Distinctiveness Conflict Risk

The evidence-backed project-memory/lesson niche with triggers like '记住这个' and '踩坑' is mostly distinct from other skills, with only minor overlap risk against generic note-taking skills.