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Phase 2 refactoring of skills >500 lines and medium-sized skills: - paid-ads: 553 → 297 lines - Extract ad-copy-templates.md, audience-targeting.md, platform-setup-checklists.md - analytics-tracking: 541 → 292 lines - Extract ga4-implementation.md, gtm-implementation.md, event-library.md - ab-test-setup: 510 → 264 lines - Extract test-templates.md, sample-size-guide.md - copywriting: 458 → 248 lines - Extract copy-frameworks.md (headline formulas, section types) - page-cro: 336 → 180 lines - Extract experiments.md (experiment ideas by page type) - onboarding-cro: 435 → 218 lines - Extract experiments.md (onboarding experiment ideas) All skills now use progressive disclosure with references/ folders, keeping SKILL.md files focused on core workflow while detailed content is available when needed. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>