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* feat(ad-creative): Mode 4 creative strategy loop + hook system (2.6.0) The workflow layer for deciding which ads to make: three-signal synthesis, evidence-ranked concepts, account-state branching, capacity- checked roadmap with production tiers, monthly retro. Plus a complete hook system (component trio, generation pipeline, diagnostic funnel, on-ramp rule, fidelity ladder). customer-research gains the zero-review persona fallback (2.0.1); marketing-loops gains the monthly-creative- retro loop (1.2.0). Closes #434. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * chore: release bookkeeping for 2.8.7 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * fix(ad-creative): address codex review — soften algorithm claims, decouple evidence from production tier, fix CPC direction, remove non-repo skill reference, flexible scaling mix Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * fix: decouple T2 tier from evidence ranks; clean stale changelog wording Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com>