Conciseness

Formatting is efficient (tables, checklists, terse bullets), but sections like 'Referral vs. Affiliate' characteristics ('Referrer is an existing customer,' 'Higher trust, lower volume') and 'High-intent moments' re-explain basic marketing concepts Claude already knows. Fits 'mostly efficient but includes some unnecessary explanation or could be tightened' — above 2 (not heavily padded) but below 4 (the conceptual comparison section is clearly trimmable).

Actionability

For an instruction-only skill the guidance is concrete: share mechanisms ranked by effectiveness, specific incentive structures, named A/B test variables, a problem→fix table, email templates with placeholders, and benchmark figures ('16-25% higher LTV'). Not a 5 because some directives remain directional ('Ask at better moments,' 'Improve landing experience') without the specificity of the copy-paste-ready 5 anchor.

Workflow Clarity

Clear end-to-end sequence: context gathering → program-type decision → design (Steps 1-3) → optimization → measurement → phased launch checklists, with checkpoint items ('Test complete referral flow,' post-launch 'Review conversion funnel,' 'Fix friction points'). Below 5 because validation is checklist-based rather than explicit validate→fix→retry feedback loops; above 3 because checkpoints are present and sequenced.

Progressive Disclosure

Clean overview structure with well-signaled, one-level-deep references that exist in the bundle: 'See [references/program-examples.md](references/program-examples.md)' and 'See [references/affiliate-programs.md](references/affiliate-programs.md)' — both real files with no nested references. Content split is appropriate (examples and affiliate detail out of the main file), matching the 5 anchor.

Specificity

Names three concrete actions ('create, optimize, or analyze') across the referral/affiliate domain, matching the 'several specific actions; minor gaps' anchor. Not a 5 because coverage is slightly thin — actions like 'design' or 'launch' are absent (launch is delegated to another skill), unlike the comprehensive multi-action 5 anchor.

Completeness

Explicitly answers both questions: what ('create, optimize, or analyze a referral program, affiliate program, or word-of-mouth strategy') and when ('Also use when the user mentions... or... Use this whenever someone wants existing users or partners to bring in new customers') with concrete trigger phrases. Matches the 5 anchor exactly; the 4 anchor's 'when could be more explicit' criticism does not apply.

Trigger Term Quality

Comprehensive natural-language triggers: 'referral,' 'affiliate,' 'ambassador,' 'word of mouth,' 'viral loop,' 'refer a friend,' 'partner program,' 'referral incentive,' 'how to get referrals,' 'customers referring customers,' 'affiliate payout' — these are exactly the phrases a user would naturally say, with synonym coverage. Re-reading the 4 anchor ('a few natural terms missing') confirms nothing significant is missing.

Distinctiveness Conflict Risk

Clear niche (user/partner-driven acquisition) with distinct trigger vocabulary and an explicit de-confliction boundary ('For launch-specific virality, see launch'). Minor overlap potential with partner-management skills via 'partner program' is not enough to drop below the 'clear niche with distinct triggers; minimal conflict risk' anchor.