Conciseness

The body is dense and assumes agent competence — it never explains what a retrospective or a linter is, and every category bullet encodes real judgment guidance rather than padding. A few long bullets (e.g., the Coding standards entry) could be tightened slightly, keeping it at 'efficient; minor instances of over-explanation' rather than fully lean.

Actionability

As an instruction-only skill it gives concrete, specific guidance: named files to inspect ('package.json/build-tool 中的 lint/check scripts 以及 CI workflow'), a concrete 1,000-line threshold for CODING_STANDARDS.md, and example improvements like tee-ing dev server logs. Minor gaps (e.g., no example of how to locate session logs) keep it below fully executable.

Workflow Clarity

A clear four-step sequence is present (load writing-for-agents guide → read primary sources, defaulting to the current session → scan seven defined categories → present candidates ordered by severity). No validation checkpoints exist, but the workflow is read-only analysis with no destructive or batch operations, so the cap does not apply; it still lacks the explicit checkpoints of a 5.

Progressive Disclosure

The skill is a single 45-line file with no bundle directories (no references/, scripts/, or assets/ exist), well-organized into '## Steps' and '## Reference' subsections, with a single one-level pointer to the external 'writing-for-agents' skill. Per the rubric's simple-skill guideline, under 50 lines with no need for external references, this earns full marks.

Specificity

The description only says "对一次 coding session 做 retrospective" — it names the domain (coding-session retrospective) but the single action phrase is generic. No concrete sub-actions (e.g., analyzing session logs, proposing environment improvements) are stated, matching the 'names the domain but actions are minimal or generic' anchor.

Completeness

There is only a vague 'what' ("做 retrospective") and no 'when' clause at all — the exact anchor-2 pattern. It cannot score 3 because the 'what' is itself vague, and the missing 'Use when...' guidance caps completeness regardless.

Trigger Term Quality

"retrospective" and "coding session" are natural phrases a user would actually say, but coverage stops there — common variations like "retro", "复盘", or "post-session review" are absent. This fits 'some relevant keywords but missing common variations or synonyms' rather than the good-coverage anchor.

Distinctiveness Conflict Risk

"retrospective" of a coding session is a niche trigger unlikely to fire for unrelated skills — mostly distinct with only minor overlap risk against general code-review skills. It is not 5 because the terse description establishes no explicit distinct trigger set.