Conciseness

The workflow steps and sub-agent briefs are lean, but the 12-item smell baseline explains each Fowler smell ("what it is -> how to fix", e.g. "Feature Envy：method 访问另一个 object 的 data 多于自己的 data。-> 把 method 移到它羡慕的数据上") — definitions and fixes Claude already knows. Only the selection of which smells form the baseline is novel; the per-smell tutorials could be compressed to a one-line list. Not a 2 because the inlining is explicitly justified ("sub-agent 没有其他方式读取它") and the rest of the body earns its tokens; not a 4 because ~15 of 90 lines re-teach standard refactoring knowledge.

Actionability

Guidance is fully executable: exact commands (`git diff <fixed-point>...HEAD`, `git log <fixed-point>..HEAD --oneline`, `git rev-parse`), a prioritized spec-discovery procedure, verbatim sub-agent briefs with word limits, and a concrete output format (## Standards / ## Spec headings plus a one-line per-axis summary). Nothing is left as vague direction.

Workflow Clarity

A clearly sequenced 5-step process with an explicit validation checkpoint: the fixed point must resolve and the diff be non-empty "继续前" so failures happen "而不是进入两个并行 sub-agents 后才失败". The missing-spec branch is handled explicitly (skip and report 'no spec available'). Not a 4 because the one risky point (bad ref / empty diff) has explicit fail-early validation and the degenerate cases are all addressed; the operation is read-only, so no destructive/batch cap applies.

Progressive Disclosure

The body is well-sectioned (流程 steps, 为什么是两条轴线) with no nested references and no dead links, and the one cross-skill mention (`/setup-matt-pocock-skills`) is clearly signaled. It falls short of 5 because the ~15-line smell baseline — static reference material the parent passes into a sub-agent prompt — is inlined in SKILL.md rather than split into a one-level-deep reference file the parent reads on demand.

Specificity

The description names concrete inputs ("commit、branch、tag 或 merge-base") and specific actions: dual-axis review (Standards/Spec each with its own question), parallel sub-agents, and side-by-side reporting. It falls short of a 5 because the actions are framed around one review pass rather than enumerating multiple discrete capabilities.

Completeness

Both parts are explicit: 'what' is the two-axis diff review from a fixed point with parallel sub-agents, and 'when' is the concrete "适用于..." clause listing branch, PR, in-progress changes, and 'review since X'. Not a 4 because the trigger guidance is explicit with concrete phrases rather than merely serviceable.

Trigger Term Quality

Natural trigger phrases are present — "审查 branch、PR、进行中的变更，或要求 'review since X' 时" — covering what a user would actually say. A few natural terms are missing (e.g., 'diff', 'pull request' spelled out, 'coding standards check'), so it does not reach comprehensive synonym coverage.

Distinctiveness Conflict Risk

The fixed-point + dual-axis (Standards vs Spec) framing carves a clear niche that distinguishes it from generic review skills. Minor overlap risk remains because 'review a branch/PR' is a trigger any general code-review skill would also claim.