Conciseness

The body is lean and efficient with no padding: it avoids explaining what TiDB or code review is and every section (Principle, Workflow, Question Patterns, Output Checklist) earns its place, matching 'Lean and efficient; assumes Claude's competence; every token earns its place'.

Actionability

The workflow gives concrete, executable guidance — decompose into intent/constraints/proposed method, mark items mandatory or negotiable, evaluate the requested approach plus an alternative, and produce a pre-coding self-analysis summary — with specific question-pattern templates, fully actionable without code, matching the instruction-skill 'fully executable; specific examples cover the common cases' anchor.

Workflow Clarity

A clearly numbered 7-step sequence with an explicit validation checkpoint ('Challenge gate before implementation') that gates coding on clarification, plus an Output Checklist for completion feedback, matching 'Clear sequence with explicit validation steps; feedback loops; checklists'.

Progressive Disclosure

Well-organized into clearly labeled sections (Trigger, Principle, Workflow, Question Patterns, Output Checklist) with no nested references and no inlined bulk content; under 50 lines with no need for external files, qualifying for the simple-skill exception at score 5.

Specificity

Names the domain (TiDB code-change criticism) and a few concrete actions ('validating', 'aligning', 'evaluating') but the actions are described abstractly; no concrete skill-level operations are listed, matching 'Names domain and 1-2 concrete actions, but not comprehensive'.

Completeness

Has both a 'what' ('validate and critique implementation instructions') and an explicit 'when' ('Use when implementing a user- or reviewer-prescribed code change...'), but the 'when' is a long qualifier-heavy clause rather than a crisp concrete trigger, so it sits at 'both what and when; when could be more explicit or specific' rather than 5.

Trigger Term Quality

Good natural-term coverage including 'review comments', 'suggested fixes', 'options', and 'implementation direction' that users would plausibly say, though it leans on phrasing like 'prescribed code change' rather than the most common user phrasings, leaving a few natural terms missing.

Distinctiveness Conflict Risk

The TiDB-specific correctness/compatibility framing gives it a clear niche distinct from generic code-review skills, with only minor overlap risk against general code-change skills; it does not reach 5 because the 'implementing a prescribed change' trigger could overlap with broader editing skills.