Conciseness

The body is mostly efficient conceptual guidance written for Claude, but sections like Philosophy and the fluency/storage-strength and retrieval/spacing/interleaving exposition re-explain learning science Claude already knows, and some lines ('想想 Tufte', 'Learners 的 working memory 非常小') add gentle padding. It is above 2 (not severely or noticeab ly padded) but below 4 because the conceptual exposition could be trimmed without losing actionability.

Actionability

Guidance is concrete and specific in places (file naming '0001-<dash-case-name>.html', '每个答案都应有完全相同的词数', '通过运行 CLI command 为用户打开 lesson file'), but much of it is descriptive rather than instructional and there is no executable code or command template. For an instruction-only skill this is partly acceptable, yet key actions remain high-level hints (e.g. how exactly to build a lesson, what a quiz widget looks like), so it sits at 3 with minor gaps rather than 4.

Workflow Clarity

The body sequences a clear teaching flow (ground in MISSION.md -> read learning-records -> judge zone of proximal development -> build lesson from ./assets -> cite primary source -> record learning), but it has no explicit validation checkpoints and the 'change mission 前先和用户确认' is the only feedback-loop guard. The destructive/batch cap (validation absent for batch/destructive ops) is not triggered, but checkpoints are mostly implicit, matching the score-3 anchor.

Progressive Disclosure

The SKILL.md is a well-sectioned overview that signals one-level-deep references to format files (MISSION-FORMAT.md, RESOURCES-FORMAT.md, LEARNING-RECORD-FORMAT.md) and asset/lesson/reference directories. However, none of those referenced bundle files actually exist in ./references, ./scripts, or ./assets, so the navigation points to missing files and the structure is partly notional. That gap keeps it at 3 rather than 4 (good structure but references not verifiably backed).

Specificity

The description '在这个工作区中教用户一个新技能或概念' names the domain (teaching a skill or concept) but offers only a single minimal action ('教'); no concrete capabilities are enumerated, so it sits at score 2 (names domain but actions minimal/generic). It is below 3 because there is no second concrete action, and above 1 because it does name a clear domain.

Completeness

There is a vague 'what' (teach a skill/concept in this workspace) and no 'when'/'Use when...' clause at all. The rubric caps completeness at 3 for a missing trigger clause, and since 'when' is entirely absent rather than weakly implied, score 2 ('vague what and no when') is the best fit.

Trigger Term Quality

Only the single generic keyword '教' and '技能或概念' appear; the natural phrases a user would say when needing this skill (e.g., '我想学', '学一下', 'tutorial', 'teach me') are absent. This matches the 'one or two generic keywords; missing the natural phrases users say' anchor.

Distinctiveness Conflict Risk

The phrase '在这个工作区中教用户一个新技能或概念' is somewhat specific to a teaching workspace and not entirely generic, but it could still overlap with general tutoring or explanatory skills and offers no distinct trigger. It fits the 'somewhat specific but could still overlap' anchor.