Skills list-hygiene-monitor
πŸ“¦

list-hygiene-monitor

v19.0.0 Content revision r2 Safe πŸ“ Filesystem accessβš™οΈ External commands🌐 Network access

Monitor email list health

Email lists can lose engagement and develop deliverability problems between campaigns. This skill turns your ESP data into clear cohorts, trend checks, and an action worklist.

Supports: Claude Codex Code(CC)
πŸ₯‰ 77 Bronze

Install with my Agent

Copy this request to your Agent. It includes the canonical Skill page and manifest.

Agent request
Review the Skillstore skill "list-hygiene-monitor" from https://skillstore.io/skills/aaron-he-zhu-list-hygiene-monitor.md and its manifest at https://skillstore.io/api/skills/aaron-he-zhu-list-hygiene-monitor/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.

Your Agent should still show its plan and request any confirmation required by the security policy.

Test it

Using "list-hygiene-monitor". Analyze a list with 21,000 subscribers and 3,100 never-engaged subscribers.

Expected outcome:

  • Cohort finding: 3,100 subscribers are never engaged, or 15 percent of the active list.
  • Action: sunset this cohort from regular sends and review clean addresses for one re-permission attempt.
  • Evidence: measured cohort count; trend needs a prior baseline.

Using "list-hygiene-monitor". Compare a 0.12 percent complaint rate with a prior 0.06 percent rate.

Expected outcome:

  • Trend: complaint rate increased by 0.06 percentage points and exceeds the 0.1 percent watch line.
  • Action: pause expansion of active sending and route the hygiene read to the email-quality auditor.
  • Next step: investigate recent sources, suppression handling, and affected cohorts.

Security Audit

Safe
v9 β€’ 7/27/2026 Open versioned report

Most static findings are false positives caused by Markdown links and code formatting. One instruction runs local ESP connector and ledger commands; it is legitimate functionality but should execute only with user confirmation and validated values.

2
Files scanned
166
Lines analyzed
1
Review items
0
False positives ignored
Capability review items (1)

These are real local capabilities that may be expected for this skill, so they require review but are not counted as confirmed malicious behavior.

Medium
Ruby/shell backtick execution
**Zero-dependency ESP read + measurement loop (when Resend is the ESP)**: `python3 "${CLAUDE_PLUGIN_
The skill instructs the agent to run local Python connector and ledger commands against ESP data. The commands are intended functionality, but execution should require user confirmation and validated arguments.
Audited by: claude View Audit History β†’
Share & cite this report

Share the versioned assessment report, neutral badge, embed card, and citations. Skillstore reports evidence without deciding whether this Skill is safe.

Open versioned report
Security Assessment

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https://skillstore.io/skills/aaron-he-zhu-list-hygiene-monitor/audits/9?utm_source=security_passport&utm_medium=share&utm_campaign=versioned_report

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Academic citations (APA Β· BibTeX Β· CFF)

APA citation

aaron-he-zhu. (2026). list-hygiene-monitor security audit report (audit version 9) [Author version 19.0.0]. Skillstore. https://skillstore.io/skills/aaron-he-zhu-list-hygiene-monitor/audits/9

BibTeX citation

@techreport{aaron-he-zhu-aaron-he-zhu-list-hygiene-monitor-2026, author = {aaron-he-zhu}, title = {list-hygiene-monitor security audit report (audit version 9)}, institution = {Skillstore}, year = {2026}, number = {9}, url = {https://skillstore.io/skills/aaron-he-zhu-list-hygiene-monitor/audits/9}, note = {Author version 19.0.0} }

CITATION.cff

cff-version: 1.2.0 message: "If you use this Skill, cite its author and this versioned security audit report." title: "list-hygiene-monitor security audit report (audit version 9)" version: "19.0.0" type: report authors: - name: "aaron-he-zhu" date-released: "2026-07-27" url: "https://skillstore.io/skills/aaron-he-zhu-list-hygiene-monitor/audits/9" identifiers: - type: other value: "skillstore:aaron-he-zhu-list-hygiene-monitor:audit:9" description: "Skillstore immutable audit report identifier"

Skillstore Score

Why this score Evidence Confidence: Medium
41
Architecture
100
Maintainability
87
Content
67
Community
91
Spec Compliance

What You Can Build

Review a growing newsletter list

Identify dormant subscribers and prepare a measured sunset plan before deliverability declines.

Investigate declining campaign engagement

Compare current bounce and complaint signals with an earlier export and prioritize follow-up actions.

Maintain a recurring hygiene process

Create a monthly or quarterly worklist with documented baselines for a marketing operations team.

Try These Prompts

Start a basic list review
Review my email list health. I will provide an ESP engagement export and bounce report. Create cohorts and a simple action worklist.
Compare with a baseline
Compare this month's engagement, hard-bounce, and complaint data with last quarter's baseline. Show the numeric changes and recommended actions.
Check suppression drift
Review these active-list and suppression exports for growth, leakage, and subscribers who need re-permission, sunset, or pruning.
Run a scheduled hygiene watch
Run a quarterly hygiene review for our newsletter profile. Use these exports and baseline, label evidence quality, produce SEND S and E reads, and state the next comparison date.

Best Practices

  • Provide a dated ESP export and a prior baseline for every scheduled review.
  • Keep opt-out and suppression records authoritative in the consent system.
  • Confirm worklist changes before removing or suppressing subscribers.

Avoid

  • Do not treat a point-in-time rate as a trend without a baseline.
  • Do not re-mail complained or hard-bounced addresses through a re-permission campaign.
  • Do not mark incomplete data as a passing hygiene result.

Frequently Asked Questions

What data do I need?
Provide engagement data, bounce and complaint data, and preferably a dated prior baseline.
Can it work with cohort totals?
Yes. It can use cohort totals, but it labels derived rates as estimated.
Does it delete subscribers?
No. It produces a worklist and asks for confirmation before saved results or downstream actions.
Does it check SPF or DKIM?
No. Use the separate deliverability pre-flight skill for authentication checks.
What is suppression leakage?
It is an opt-out or suppressed address that remains eligible for active sending.
Can I use it every month?
Yes. Each completed review can become the baseline for the next scheduled comparison.

Developer Details

License

Apache-2.0

Author version

v19.0.0

Skillstore revision

r2

Ref

0715a6e09ea875c8e28cb705ce87cc83045e69c1

Maintenance freshness

7/28/2026

Usage

3 downloads Β· 1 views

File structure

πŸ“ references/

πŸ“„ hygiene-checklist.md

πŸ“„ SKILL.md

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