Conciseness

The body defines well-known concepts Claude already knows ("Loss Aversion — People feel losses 2x more than gains", "Social Proof — People follow others") and maintains three overlapping model listings (Categories at a Glance, Most-Used Models, and the Quick Reference table all repeat Loss Aversion, Social Proof, Anchoring, etc.). It is mostly tight and table-driven, matching anchor 3 ("some unnecessary explanation or could be tightened") rather than 4 because the redundant listings span roughly 40 lines.

Actionability

Directives are concrete and executable: "Show higher price first, then your price", "Under $100: show % discount. Over $100: show $ discount", "Limit to 3 tiers", "Let people 'own' something before paying (free trial, saved progress)", and the Quick Reference table maps common situations to specific models. As an instruction-only skill the absence of code is not penalized since the guidance is specific and covers the common marketing cases.

Workflow Clarity

Three clearly defined entry modes (Diagnose/Apply/Reference), a five-question diagnostic sequence, and an output-artifacts table give a clear path, and the Communication section adds output verification tagging. It falls short of anchor 5 because there is no explicit end-to-end sequence or error-recovery/feedback loop; no destructive or batch operations exist, so the validation cap does not apply.

Progressive Disclosure

The body is an overview (category table plus most-used models) that delegates the full catalog to a well-signaled one-level-deep reference with explicit load-when guidance ("The full catalog lives in [references/mental-models-catalog.md]... Load it when you need to look up specific models"). The bundle was verified: a single real catalog file exists with no nested references.

Specificity

The description names the domain and a single action ("apply psychological principles, mental models, or behavioral science to marketing") and states what the skill contains ("provides 70+ mental models organized for marketing application"), matching anchor 3 (domain plus 1-2 concrete actions). It is below anchor 4 because it does not list several distinct concrete actions. Voice is appropriately third-person, so no penalty applies.

Completeness

Both parts are explicit: the 'what' ('This skill provides 70+ mental models organized for marketing application') and the 'when' with concrete trigger phrases ('When the user wants to apply...' and 'Also use when the user mentions...'). This matches anchor 5; the 'when' clause needs no further specificity, so it is not a 4.

Trigger Term Quality

Eight quoted natural trigger terms are given — 'psychology,' 'mental models,' 'cognitive bias,' 'persuasion,' 'behavioral science,' 'why people buy,' 'decision-making,' 'consumer behavior' — covering synonyms and genuine user phrasings like 'why people buy.' This comprehensively matches anchor 5; file extensions are not applicable to this domain.

Distinctiveness Conflict Risk

The description carves a clear niche (psychology applied to marketing) with domain-specific triggers, but the standalone terms 'decision-making' and 'psychology' could fire in non-marketing contexts, creating minor overlap risk with adjacent marketing skills. This fits anchor 4 (mostly distinct, minor overlap risk) rather than anchor 5's minimal conflict risk.