Conciseness

The procedural core (7-step process, 心内判据 checklist, diagram specs, output format) is efficient, but extended philosophical exposition — the water/cup metaphor ("没有约束的东西没有形状..."), the camel/desert evolutionary metaphor, the "人不能飞" aside — pads the token budget with framing Claude largely does not need. It is mostly efficient but could be tightened, matching the score-2 anchor rather than the lean score-3 anchor.

Actionability

For an instruction-only skill the guidance is concrete and executable: a numbered 7-step process with specific probing questions, a 7-item verification checklist, three ASCII diagram templates with exact allowed/disallowed character lists, and an output section with exact commands (date +%Y%m%dT%H%M%S) and file path pattern. This matches the score-3 anchor of concrete, copy-ready guidance.

Workflow Clarity

A clearly sequenced 7-step process is paired with explicit validation checkpoints and a feedback loop: the 心内判据 section states "过不了一条，回工序接着走" and the diagram spec says "右边对不上左边，就是约束没找准，回去接着挖". This matches the score-3 anchor of a clear sequence with explicit validation and error-recovery loops.

Progressive Disclosure

The single reference (references/template.org) is one-level deep and clearly signaled ("frontmatter 见 references/template.org"), and the body is well-organized with section headers. But the SKILL.md is a ~240-line monolithic file where substantial conceptual sections and the diagram-template library are inline rather than split into reference files, fitting the score-2 anchor of content that could be better separated more than the score-3 anchor of content appropriately split across files.

Specificity

Lists multiple concrete actions — "找出真正框住它的几条约束", "判明它们属于世界/规则/解释（硬/软/自设）", "框出解空间并解释实际行为", "区分目标相同但约束不同导致的方案分歧", "识别被误当硬事实的旧解释" — matching the anchor for listing several specific concrete actions.

Completeness

Explicitly answers both what (找出约束、判明硬度、框解空间、解释行为) and when (an explicit "USE WHEN" trigger clause plus a "NOT FOR" exclusion clause), matching the anchor for clearly answering both what AND when with explicit triggers.

Trigger Term Quality

The USE WHEN clause packs natural phrases a Chinese user would actually say — '约束', '找约束', '这个领域的约束是什么', '本质约束', '边界在哪', '这行为什么这么做', 'constraint', '/ljg-constraint' — giving good coverage of natural terms rather than jargon.

Distinctiveness Conflict Risk

Carves a clear niche (constraint/solution-space analysis) and the "NOT FOR" clause explicitly distinguishes it from sibling skills (ljg-rank, ljg-think, ljg-book, ljg-learn) with reasons, making it unlikely to trigger for the wrong skill.