Conciseness

The body is dense and assumes competence ("Missing columns become NEEDS_INPUT flags, not guesses"), but the scope boundary is stated three times — in the intro ("this skill does not build campaigns"), the description, and the Scope guard paragraph — and campaign-architect is linked in three separate sections, so minor trimming is possible. This fits the 4 anchor ("efficient; minor instances of over-explanation") rather than the every-token-earns-its-place bar at 5.

Actionability

The seven numbered steps give concrete, executable direction with specifics — segment name examples (`repeat-buyers-90d`, `pricing-page-visitors`), a suppression window ("14–30 days"), ROAS A weights (0.15/0.30/0.10), and an exact save path template — which for an instruction-only skill meets the mostly-executable 4 anchor. It falls short of 5 because the actual output artifact (handoff summary / segment plan format) is delegated to an external skill-contract.md reference rather than shown, leaving a minor gap in copy-paste-ready coverage.

Workflow Clarity

The workflow is a clearly sequenced 7-step process with explicit error-recovery loops ("Missing columns become NEEDS_INPUT flags, not guesses"; "mark the affected bucket NEEDS_INPUT rather than fabricating it") and a validation checklist in the contract ("Done when: each audience is named and grounded in an exported column..."), plus a user-confirmation checkpoint before saving. This matches the 5 anchor's explicit validation steps and feedback loops rather than the 4 anchor, whose "minor validation gaps" are not present.

Progressive Disclosure

The body is a well-organized ~65-line overview with clearly labeled sections and a Reference Materials list that signals each file's purpose, and no detail is nested more than one level. It stops at 4 because the referenced paths (../../../references/skill-contract.md, ../../../CONNECTORS.md, ../campaign-architect/SKILL.md) escape the skill directory and no bundle files (references/, scripts/, assets/) actually exist alongside this SKILL.md, so navigation depends on an external repo layout — an organization gap versus the clean one-level-deep structure at 5.

Specificity

The description lists four concrete, distinct outputs — "seed audiences", "value-based lookalike SEED lists", "exclusion/suppression segments", and a "cross-platform funnel-stage targeting map" — plus the input it operates on ("the user's OWN customer/CRM/GA4 export"), matching the comprehensive-coverage anchor rather than the several-actions-with-gaps anchor at 4.

Completeness

It explicitly answers both questions: what it does ("turns the user's OWN customer/CRM/GA4 export into seed audiences...") and when to use it ("Use when the user asks to...") with concrete quoted trigger phrases, exactly matching the 5 anchor; the 4 anchor's "when could be more explicit" clearly does not apply.

Trigger Term Quality

It quotes natural user phrasings verbatim ("build audience segments from my customer list", "make value-based / lookalike seed lists", "set up exclusion / suppression segments") and includes synonyms (exclusion/suppression, seed/lookalike, funnel stages) plus a bilingual Chinese trigger summary, giving comprehensive natural-term coverage; a 4 would require missing common variations, which is not the case.

Distinctiveness Conflict Risk

It carves out a clear niche (paid-audience WHO-targeting from own exports) and adds explicit negative routing — "Not for building account structure or match types — use campaign-architect; not for organic SERP intent — use keyword-research" — minimizing conflict risk with sibling skills; this is stronger than the 4 anchor's "minor overlap risk with closely related skills".