SKILL.md
List Hygiene Monitor
The ongoing hygiene watch, not the pre-flight — a scheduled read of list decay and suppression drift that turns the ESP export into a segmented re-permission / sunset / prune worklist. It cohorts the list by engagement recency (30/90/180/365-day last-open/click), trends hard-bounce and spam-complaint rates against benchmark and the prior baseline, and checks suppression-list growth and leakage — feeding the SEND S (Sender-integrity / Deliverability, list-hygiene sub-item) and E (Engagement, engagement-decay / sunset sub-item) signals. Scope guard: this skill produces the recurring hygiene worklist and the S-hygiene / E-decay reads only; it does NOT run the one-time authentication pre-flight (deliverability-qa), own the consent / suppression record (consent-registry), or compute the profile-weighted EQS / enforce the S1/S2/N1/D1 vetoes (email-quality-auditor). deliverability-qa answers "will this one send land?"; this skill answers "is the list rotting between sends, and who do I re-permission or prune?" — build the worklist here, let the gate render the EQS verdict.
Quick Start
Watch my list health for [program]. Here is my ESP engagement export (last-open/click per subscriber) and bounce/complaint report — give me the decay cohorts and a prune worklist.
My open rate is drifting down and bounces are creeping up. Trend it against last quarter's baseline and tell me who to sunset vs re-permission. ESP: [name]. Profile: [promotional / retention / cold-outbound / newsletter].
Run the scheduled hygiene check: engagement-recency cohorts, suppression-list growth, and a segmented re-permission / prune list I can action. Baseline: [paste/path].