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list-hygiene-monitor

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Use when the user asks to "watch my list health over time", "flag decaying / unengaged subscribers on a schedule", "why is my open rate drifting down / bounces creeping up", or "build me a re-permission and prune worklist"; runs the scheduled SEND list-decay + suppression-drift watch — an engagement-recency cohort read (30/90/180/365-day), hard-bounce and spam-complaint trend vs benchmark, suppression-list growth/leakage check, and a segmented re-permission / sunset / prune worklist tied to SEND S (list hygiene) and E (engagement-decay) sub-items. Not for the one-time pre-send authentication pre-flight — use deliverability-qa; not for the consent/suppression record itself — use consent-registry; not for computing the EQS or enforcing vetoes — use email-quality-auditor. 邮件列表健康度监控/退订漂移/沉睡用户清理

email/setup/list-hygiene-monitor/SKILL.md

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Nov 10, 2026
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Apache-2.0

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# 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](../deliverability-qa/SKILL.md)), own the consent / suppression record ([consent-registry](../../../protocol/consent-registry/SKILL.md)), or compute the profile-weighted EQS / enforce the `S1`/`S2`/`N1`/`D1` vetoes ([email-quality-auditor](../../deliver/email-quality-auditor/SKILL.md)).** 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].
```
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