Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add LeadMagic/gtm-skills --skill deliverability-monitoringgit clone --depth 1 https://github.com/LeadMagic/gtm-skillsWrote 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.
[](https://agentmods.dev/skills/leadmagic/gtm-skills/deliverability-monitoring)<a href="https://agentmods.dev/skills/leadmagic/gtm-skills/deliverability-monitoring"><img src="https://agentmods.dev/badge/skills/leadmagic/gtm-skills/deliverability-monitoring/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.
<a href="https://agentmods.dev/skills/leadmagic/gtm-skills/deliverability-monitoring"><img src="https://agentmods.dev/badge/skills/leadmagic/gtm-skills/deliverability-monitoring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00067 | $0.05686 |
| Opus 5 | $0.00034 | $0.02843 |
| Sonnet 5 | $0.00013 | $0.01137 |
| Haiku 4.5 | $0.00007 | $0.00569 |
Grade A, and why
deliverability-monitoring 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 391 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Deliverability Monitoring
Overview
Deliverability Monitoring provides continuous surveillance of email infrastructure health — the foundation on which all outbound GTM rests. The core principle is that deliverability problems compound silently: by the time you notice lower reply rates, reputation damage may already be weeks deep and require months to repair. This skill prevents the catastrophic mistake of discovering deliverability issues through pipeline decline rather than proactive monitoring.
The non-obvious rule: deliverability is not binary (delivered vs bounced). It exists on a spectrum — inbox vs spam folder vs promotions tab vs graymail vs blocked. A "delivered" email that lands in the spam folder is effectively undelivered. This skill measures inbox placement, not just delivery status.
This skill produces a Domain Health Dashboard with: real-time bounce tracking across all sending domains, spam placement rates by mailbox provider, blacklist status across 50+ blacklists, DMARC aggregate report analysis with forwarding source identification, authentication health scores (SPF/DKIM/DMARC), and predictive reputation trend alerts.
When to Use
- User says "check my deliverability" or "domain health check" → activate this skill
- User mentions "bounce rate is high" or "emails going to spam" → use this skill for diagnosis
- User asks "is my domain blacklisted" or "blacklist check" → activate monitoring module
- User says "DMARC reports" or "who is sending as my domain" → run DMARC analysis
- User mentions "spam placement" or "inbox rate" → track placement by provider
- User asks "domain reputation" or "sender score" → check reputation scores
- Trigger phrases: email deliverability, bounce tracking, spam folder, sender reputation, email authentication, DKIM SPF, domain warming, inbox placement test
Do NOT use for:
- Setting up DNS authentication initially → use domain-infrastructure
- Writing relevant, permission-aware email content → use cold-email-copywriting
- Campaign performance analysis (opens, replies, meetings) → use campaign-analytics
- Choosing or configuring sending platforms → use sending-platforms
- Sequence design or cadence → use cold-email-strategy
What ships with it
3 files 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.
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.
- 4d ago Changed 320d046dab79
- 8d ago Changed ee2abfa2e769
- 12d ago First seen · 391 lines · 67 tokens per session scan A 509ef58787d6
deliverability-monitoring is a skill published in the GitHub repository LeadMagic/gtm-skills (50 stars, last pushed 5d ago), licensed MIT. It adds 67 tokens to every session and 5,686 once invoked, about $0.0003 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.
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