Conciseness

Four lean sentences, every one a directive, with zero padding and no explanations of concepts Claude already knows. The body adds behavior the description alone doesn't fully specify (one-at-a-time, recommendation per question, codebase-first), so every token earns its place — anchor 5, not 4, since nothing could be trimmed.

Actionability

'Ask the questions one at a time', 'For each question, provide your recommended answer', and 'If a question can be answered by exploring the codebase, explore the codebase instead' are concrete, unambiguous directives. Minor gaps keep it below anchor 5: no example question illustrating the desired depth, and no stated end-of-interview deliverable (e.g., summarize the resolved decisions).

Workflow Clarity

A single-purpose skill under 50 lines with an unambiguous loop — one question at a time, recommendation each round, resolve each branch — and an explicit termination condition ('until we reach a shared understanding'). No destructive or batch operations, so no validation cap applies; the simple-skill exception makes this a clear anchor 5.

Progressive Disclosure

Under 50 lines with no need for external references — no bundle files exist and none are referenced, correctly. At four sentences the content is trivially well-organized; per the under-50-lines guideline this is anchor 5, not 4, since there is nothing that should be split out.

Specificity

Lists several concrete actions — 'Interview the user relentlessly', 'resolving each branch of the decision tree', 'until reaching shared understanding' — with only minor coverage gaps (the recommend-an-answer-per-question behavior is absent). It goes beyond the 1–2 bare actions of anchor 3 but not to the comprehensive coverage of anchor 5.

Completeness

Explicitly answers both what ('Interview the user relentlessly about a plan or design... resolving each branch of the decision tree') and when with concrete trigger phrases ('Use when user wants to stress-test a plan, get grilled on their design, or mentions "grill me"'), matching the anchor 5 example structure exactly. The when-clause is already explicit and specific, so anchor 4's 'could be more explicit' does not apply.

Trigger Term Quality

'stress-test a plan', 'get grilled on their design', and the literal 'grill me' are phrases a user would naturally say. A few natural synonyms are missing ('poke holes in my plan', 'pressure-test', 'interview me about my design'), so it falls short of anchor 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

'grill me' / 'get grilled' are distinctive triggers creating a clear niche, but 'stress-test a plan' has real overlap risk with general plan-review and architecture-critique skills. Mostly distinct with minor overlap risk — anchor 4; not 5 because a plausible wrong-skill trigger exists.