The ~400-line body is mostly efficient domain content, but the Purpose section duplicates the frontmatter intent verbatim and the Biases to Avoid section overlaps with Common Pitfalls; some explanation (e.g., what confirmation bias / leading questions are) is knowledge Claude already has. It is not a 3 because the redundancy and padded explanation mean not every token earns its place; it is not a 1 because the bulk is genuinely specific, actionable domain material rather than abstract filler.

Concrete enumerated options per question, copy-paste phrasing for each methodology ("Tell me about the last time you..."), specific Avoid directives, a full markdown output template, and numeric recruiting guidance ("Reach out to 20-30 people to get 5-10 interviews") make this copy-ready. It is not a 2 because guidance is complete and executable rather than pseudocode or abstract description.

A clearly numbered sequence (Step 0 → Q1 → Q2 → Q3 → Q4 → Output) with explicit adaptation tips and context-gathering before questions. It is not a 2 because the steps and their order are explicit and well-sequenced; this is not a destructive/batch operation, so the validation-checkpoint cap does not apply.

Headers organize the file and external-skill references are clearly signaled, but no bundle files exist and the long output template plus full question bank are kept inline in one monolithic ~400-line file. It is not a 3 because content that could be split (the interview-plan template, the methodology question bank) is not separated into one-level-deep reference files; it is not a 1 because there is real section structure and no deep reference nesting.

"Plan customer discovery interviews with the right goal, segment, constraints, and method" lists multiple concrete actions (goal, segment, constraints, method), matching the score-3 anchor for multiple specific concrete actions. It is not a level below because it goes beyond naming only a domain and a single action.

It answers "what" (plan interviews with goal/segment/constraints/method) and "when" with an explicit "Use when preparing interviews for..." clause. It is not a level below because the trigger guidance is explicit rather than merely implied.

"customer discovery interviews", "problem validation", "churn research", and "new product ideas" are natural phrases a PM would actually say, giving good coverage. It is not a level below because it covers multiple common variations rather than a single generic term.

"customer discovery interviews" plus the three named triggers carve a clear niche unlikely to fire for adjacent skills (surveys, usability testing). It is not a level below because the triggers are specific rather than generic enough to overlap many skills.