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 cmj-hub/claude-cold-email --skill cold-emailgit clone --depth 1 https://github.com/cmj-hub/claude-cold-emailWrote 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/cmj-hub/claude-cold-email/cold-email)<a href="https://agentmods.dev/skills/cmj-hub/claude-cold-email/cold-email"><img src="https://agentmods.dev/badge/skills/cmj-hub/claude-cold-email/cold-email/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/cmj-hub/claude-cold-email/cold-email"><img src="https://agentmods.dev/badge/skills/cmj-hub/claude-cold-email/cold-email.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00217 | $0.01339 |
| Opus 5 | $0.00109 | $0.00669 |
| Sonnet 5 | $0.00043 | $0.00268 |
| Haiku 4.5 | $0.00022 | $0.00134 |
Grade A, and why
cold-email 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 2d 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 — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cold Email — JMC Outreach Craft Skill
Comprehensive cold email orchestrator for B2B operators. Anchors every output on a Pain Signal Profile (not demographics) and forces the output into a shape you can ship.
Quick Reference
| Slash | What it does |
|---|---|
/cold-email |
Interactive mode — detect intent, route to a sub-skill |
/cold-email write |
Draft a single signal-anchored cold email (<90 words, binary CTA) |
/cold-email sequence |
Design a 3-touch or 5-touch follow-up sequence |
/cold-email audit |
30-point outbound program audit (infra / targeting / messaging / ops) |
/cold-email nurture |
5-email nurture stream with route-to-sales trigger |
/cold-email deliverability |
15-point pre-campaign domain health check |
/cold-email subject |
Subject-line patterns by framework (pain / curiosity / proof / direct) |
Core principles (the JMC stance)
- A cold email is a hire — not a search query. Every prompt anchors on a Pain Signal Profile, names the constraint, and forces the output into a shape you can ship.
- No demographics in the opener. "VP of Marketing at Series B SaaS" isn't a signal. "Just posted a job for a Demand Gen Lead" is.
- Binary CTAs only. "Worth 15 minutes Thursday?" not "Let me know if you'd like to learn more."
- <90 words for the first touch. Anything longer signals desperation.
- One specific ask per email. Stack-ranked asks confuse buyers.
- No "Hope you're well" / "Just bumping this". Banned openers.
Workflow router
When invoked, detect the user's intent and route to a sub-skill:
| User says | Route to |
|---|---|
| "Write a cold email to..." | skills/cold-email-craft |
| "Build a 3-touch / follow-up sequence" | skills/cold-email-craft (sequence mode) |
| "Audit my outbound program" | skills/cold-email-audit |
| "Design a nurture stream" | skills/cold-email-nurture |
| "Is my domain ready to send?" | skills/cold-email-deliverability |
| "Suggest subject lines" | skills/cold-email-subject-lines |
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.
- 2d ago Changed · -14 lines 21abf6e3cf41
- 10d ago First seen · 127 lines · 217 tokens per session scan A 81af959b5de1
cold-email is a skill published in the GitHub repository cmj-hub/claude-cold-email (2 stars, last pushed 2d ago), licensed MIT. It adds 217 tokens to every session and 1,339 once invoked, about $0.0011 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 2026-08-31.
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