Conciseness

The body assumes competence (never explains what a lookalike or CPA is) and every line carries operationally specific content — thresholds ("CTR down 20%+ week over week"), tier multipliers ("~1.2-1.8x"), and match-rate data ("55-80% of records on Meta and Google") — with no padded or tutorial-style passages to trim.

Actionability

For an instruction-only skill the guidance is fully concrete: named tools (list_audiences, optimize_budget, the five pull_*_performance tools), a four-tier ladder with expected CPA ranges, hard decision rules ("~1,000 matched users", "50+ conversions/week on Meta", "under 30% is a data-quality problem"), and field-formatting specs (E.164, lowercase/trimmed emails, split name fields) covering the common cases.

Workflow Clarity

A clear six-step sequence (audit, ladder, seeds, layering, algorithmic handoff, monitor) with explicit checkpoints and feedback loops: kill rules for rungs exceeding CPA ceilings, preflight before enabling, weekly monitor-rebalance, and feeding winning converters back into the seed pool; validation is present for the budget/kill operations, so no destructive/batch cap applies.

Progressive Disclosure

No bundle files exist and the body is well organized with clear section headers and clearly signaled cross-skill references (bold names like **launch**, **campaign-preflight**), but ~55 lines of reference-style detail (tier tables, match-rate formatting, platform thresholds) sit entirely inline in a single file with no one-level-deep reference split available, leaving a minor organization gap.

Specificity

"lookalike ladders, seed quality, audience layering, and exclusion hygiene" names several concrete capability areas anchored by a concrete action ("Expand targeting without wrecking CPA"), but the list omits parts of the skill's scope (monitoring/rebalancing, algorithmic-targeting handoff), matching the 'several specific actions with minor gaps' anchor rather than comprehensive coverage.

Completeness

It explicitly answers both questions: a clear "what" ("lookalike ladders, seed quality, audience layering, and exclusion hygiene across platforms") and an explicit "Use when a user wants to..." clause listing four concrete trigger scenarios, matching the anchor for clearly and explicitly answering both what and when.

Trigger Term Quality

"scale beyond exhausted audiences", "build lookalikes", "fix audience fatigue", and "set up exclusion lists" are natural phrases a paid-media user would say, but common synonyms and variations (e.g., "prospecting", "new audiences", "broad targeting") are absent, so coverage is good rather than comprehensive.

Distinctiveness Conflict Risk

The paid-audience-expansion niche is clear and its triggers are specific to it, but it sits in a dense sibling-skill ecosystem (ad-copy-generation, creative-testing, kill-scale-rules) and "fix audience fatigue" could plausibly also fit a creative-rotation skill, giving minor overlap risk with closely related skills.