Conciseness

The ~24-line body is lean and efficient with zero padding: every section ("When to use", "Non-goals", "Workflow", "Output shape") adds guidance Claude would not infer, such as "Do not treat 'run all tests' as debugging by default". It matches the anchor-5 profile of assuming Claude's competence with every token earning its place; there is no verbosity to knock it to 4.

Actionability

For an instruction-only skill the guidance is concrete and directive — "Localize to component/file/line", "Fix only when authorized; otherwise hand back a diagnosis with evidence", plus a concrete five-field output template. It is not a 5 because no concrete localization or minimization techniques or a worked example are given, leaving minor gaps in executable detail; it is clearly above 3 since the steps are specific and deliverable-shaped rather than vague direction.

Workflow Clarity

The five-step workflow is a clearly sequenced reproduce → minimize → localize → root-cause → fix chain with decision gates ("Do not jump to a fix before reproduction/localization"; "Fix only when authorized") serving as checkpoints. It is not a 5 because there is no verify-the-fix step or explicit feedback loop after a fix is applied — a minor validation gap; it is not a 3 because checkpoints are explicit rather than implicit and the skill involves no destructive or batch operations that would trigger the cap.

Progressive Disclosure

The skill is under 50 lines with no need for external references (no references/, scripts/, or assets/ bundles exist), and the content is organized into clearly labeled sections. Per the rubric's simple-skill guideline, well-organized sections alone justify a 5 here; there is no monolithic content or buried-reference problem that would lower it.

Specificity

"Reproduce, minimize, localize, identify root cause, and distinguish diagnosis from an authorized fix" lists multiple specific concrete actions that comprehensively cover the debugging workflow (reproduce → minimize → localize → root cause → fix decision), matching the anchor-5 example of comprehensive concrete actions. It is not a 4 because coverage of the debugging process is complete rather than having minor gaps; not below 5 since every listed action is concrete rather than generic.

Completeness

The 'what' is clear and multi-action, but there is no 'Use when...' clause or equivalent explicit trigger guidance in the description; per the judging guidelines a missing 'when' clause caps completeness at 3. It is not a 4 because the 'when' is not even weakly stated here (the trigger terms live only in the body's 'When to use' section), and not a 2 because the 'what' half is explicit and detailed.

Trigger Term Quality

"root cause" and "reproduce" are genuinely natural phrases users say when debugging, but common variations and synonyms a user would actually utter — "bug", "error", "crash", "flaky test", "regression" — are absent (they appear only in the body, not the description). This matches the anchor-3 profile of some relevant keywords with missing common variations; it is not a 4 because the highest-frequency user terms for this domain are missing, and not a 2 because more than one relevant natural keyword is present.

Distinctiveness Conflict Risk

The process framing "distinguish diagnosis from an authorized fix" and "Prefer root-cause over symptom patches" carves out a distinct debugging niche that would not fire for PDF or document skills, giving mostly-distinct triggers with only minor overlap risk against closely related skills like testing/verification or code review. It is not a 5 because the description's verbs ("minimize", "localize") are domain-generic without the debugging vocabulary that would fully disambiguate it from generic troubleshooting or analysis skills.