inbox-placement-monitor

inbox-placement-monitor is a skill for Claude Code from aaron-he-zhu/aaron-marketing-skills. It costs 166 tokens per session (3,427 once invoked), scanned A, original, Apache-2.0.

A post-send email deliverability tracker that shows whether messages reached inboxes, spam folders, or promotions tabs at different mail providers. It also follows sending-domain and IP reputation using Gmail Postmaster Tools and Microsoft SNDS.

In plain words
What is it for?
Use it to compare seed-list placement results between sends, review provider-by-provider inbox and spam rates, and track changes in domain or IP reputation.
Why use it?
It helps identify where email delivery worsened after a campaign and separates measured results from estimates or user-provided information.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: mentions Claude Code; built for openclaw.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is Emit the standard shape from [skill-contract.md §Handoff Summary Format](../../../references/skill-contract.md). This is a non-auditor skill: it does **not** em.

Part of the aaron-marketing plugin — 120 skills shipped together , and of aaron-marketing

Good fit Use it to compare seed-list placement results between sends, review provider-by-provider inbox and spam rates, and track changes in domain or IP reputation.

Compare 6 skills from other repositories ↓
About the project

aaron-marketing-skills is a collection of 120 AI-agent skills covering marketing work such as brand narrative, search optimization, social media, email, advertising, influencer campaigns, and launches. Marketers and agent users can install it as a plugin, use its portable skills, or run its described bot team. The catalogue entries are components of this marketing workflow.

aaron-he-zhu/aaron-marketing-skills · 2,767 stars · on GitHub · aaronmarketing.ai

Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/aaron-he-zhu/aaron-marketing-skills
agentmods
npx agentmods add skills/aaron-he-zhu/aaron-marketing-skills/inbox-placement-monitor

Made for: Claude Code.

Or install aaron-marketing, the plugin that ships this one along with the rest of its 120 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for inbox-placement-monitor

README.md
[![agentmods](https://agentmods.dev/badge/skills/aaron-he-zhu/aaron-marketing-skills/inbox-placement-monitor/github.svg)](https://agentmods.dev/skills/aaron-he-zhu/aaron-marketing-skills/inbox-placement-monitor)
Your own site
<a href="https://agentmods.dev/skills/aaron-he-zhu/aaron-marketing-skills/inbox-placement-monitor"><img src="https://agentmods.dev/badge/skills/aaron-he-zhu/aaron-marketing-skills/inbox-placement-monitor/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for inbox-placement-monitor

Your own site · 80×15
<a href="https://agentmods.dev/skills/aaron-he-zhu/aaron-marketing-skills/inbox-placement-monitor"><img src="https://agentmods.dev/badge/skills/aaron-he-zhu/aaron-marketing-skills/inbox-placement-monitor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 166 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,427 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Socket pass 2 Sept 2026
  • Snyk warn 2 Sept 2026
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 71
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00166 $0.03427
Opus 5 $0.00083 $0.01714
Sonnet 5 $0.00033 $0.00685
Haiku 4.5 $0.00017 $0.00343

Measured 10d ago against content hash b800ed91bee0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

inbox-placement-monitor scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

email/deliver/inbox-placement-monitor/SKILL.md · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Inbox Placement Monitor

Post-send placement telemetry: where mail actually landed per mailbox provider (inbox vs spam vs promotions from a seed-list test), the domain/IP reputation trend from Gmail Postmaster Tools and Microsoft SNDS, and the send-over-send delta with named regressions — delivered as a per-provider placement read plus a reusable SEND S (Sender-integrity / Deliverability) placement snapshot, with each number labeled Measured / User-provided / Estimated. This is the after half of SEND-S: deliverability-qa verifies the signal before a send (auth pre-flight, static reputation, one placement test); this skill tracks what happened after it and how reputation moves across sends. Scope guard: this skill tracks post-send placement + reputation trend and hands off a SEND-S placement snapshot; it does NOT run the S1 SPF/DKIM/DMARC auth pre-flight (that is deliverability-qa) and does NOT compute the profile-weighted EQS or enforce the S1/S2/N1/D1 vetoes (that is email-quality-auditor). Build/trend the telemetry here; let the gate render the verdict.

Quick Start

Track inbox placement for [sending domain] after my last send. Here is my seed-list test (inbox/spam/promotions per provider) and my Gmail Postmaster + Microsoft SNDS export: [paste/path].
Trend my sender reputation over the last [N] sends and flag any placement regression. Profile: [promotional / retention / cold-outbound / newsletter]. Prior baseline: [paste/path].
Did placement drop after my last campaign? Compare this seed test against the prior one and tell me which provider regressed and by how much.

Skill Contract

Expected output: a per-provider placement read (inbox / spam / promotions %, per Gmail, Outlook/Microsoft, Yahoo, Apple) from the seed-list test; a domain/IP reputation trend from Gmail Postmaster Tools and Microsoft SNDS (high/medium/low/bad, complaint-rate curve, IP status); a send-over-send delta naming each regression with its number; the SEND-S placement sub-item read (inbox-placement ≥ threshold, spam-complaint < 0.1%) with the typed profile named; and the standard handoff summary. Every metric is labeled Measured / User-provided / Estimated — never invent a placement number; if a provider's export is missing, mark that provider NEEDS_INPUT.

Read the full file on GitHub · 90 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago Changed · +2 lines b800ed91bee0
  2. 13d ago First seen · 88 lines · 166 tokens per session scan A f95935743643

Subscribe to this mod's changes

inbox-placement-monitor is a skill published in the GitHub repository aaron-he-zhu/aaron-marketing-skills (2,767 stars, last pushed today), licensed Apache-2.0. It adds 166 tokens to every session and 3,427 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.