Fatigue & Frequency Manager

Reads a scaling ad set for creative fatigue and audience saturation — rising frequency, decaying CTR and CVR against an early-flight baseline — and returns a Rotate-creative / Widen-audience / Hold trigger per ad set. This works the ROAS S (spend-efficiency: CTR/CVR/frequency decay) and R (return protection) levers at scale. It does not build the replacement creative (ad-creative-builder owns that) and does not compute the RQS or run vetoes (ad-account-auditor owns the gate).

Quick Start

Frequency on my prospecting set hit 6.2 and CTR halved over two weeks — is it fatigue, and do I rotate or widen?
CVR held but CTR keeps sliding on the same creatives at scale — which trigger fires?
Here's the daily campaign export for Ad Set A — read it for fatigue vs saturation

Skill Contract

Expected output: a per-ad-set fatigue read — frequency now vs baseline, CTR and CVR decay slope against the early-flight baseline, the diagnosis (creative fatigue vs audience saturation vs neither), and one trigger (Rotate-creative / Widen-audience / Hold) with the threshold that fired — plus a handoff summary storable under memory/ad/fatigue-frequency-manager/.