Conciseness

The body is lean and directive throughout — 'Do not reveal candidate text, scores, or private reasoning across generators. Assign an opaque identifier to every generated candidate.' — with zero explanations of concepts Claude already knows and no padded passages. Every line instructs or constrains, matching the 'every token earns its place' anchor.

Actionability

Concrete, executable guidance dominates: exact return values ('return needs_contract', 'PASS, FAIL, or UNKNOWN'), a copy-paste BEST-OF-N RESULT output template, and specific mechanics like isolated worktrees 'from the same base revision' and capturing 'commands, output location, exit status, artifact hash or revision'. Not 5 because the full method and the proof-log template are delegated to external files outside the skill bundle, so a reader must chase those to fully execute.

Workflow Clarity

The eight-step procedure is clearly sequenced with explicit validation checkpoints and feedback loops: contract freezing before generation, the needs_contract early exit, executable checks with recorded exit status, reviewer escalation 'If executable verification cannot decide the requirement', and UNKNOWN blocking verified claims. An input checklist and a guardrails section round out a full error-recovery loop.

Progressive Disclosure

The ~50-line body is well organized into focused sections and appropriately delegates detail through clearly signaled one-level-deep links: 'Read the full method at [Best-of-N: Generate, Select, and Verify]', the TESTING.md proof-log template, and a Connections section of related guides. There is no inlined content that belongs in a separate file.

Specificity

The description lists three concrete third-person actions — 'Generate bounded independent candidates, score them against a frozen rubric, and verify the selected result with a proof log' — matching the several-specific-actions anchor. It is not 5 because coverage is not comprehensive: the selection step is only implied by 'the selected result', and no candidate-count or batching capability is named.

Completeness

The 'what' is clearly stated (generate, score, verify), but there is no 'Use when...' clause or equivalent trigger guidance, which caps completeness at 3 per the judging guidelines. It is not 4 because nothing in the description states when to use the skill.

Trigger Term Quality

Keywords like 'candidates', 'score', 'rubric', 'verify', and 'proof log' are relevant but jargon-leaning, and the natural phrases a user would say ('best-of-N', 'multiple options', 'try several approaches', 'pick the best') are absent. Not 4 because the common variations and synonyms are missing entirely, not just a few.

Distinctiveness Conflict Risk

The bounded-candidate generation plus frozen-rubric scoring plus proof-log verification niche is mostly distinct, with only minor overlap risk against general evaluation or code-review skills. Not 5 because the description lacks explicit distinct trigger phrases that would fully separate it from those related skills.