What is email-skills CLAUDE.md?

Repository instructions for a collection of AI-agent skills for email marketing. They explain the folder layout, required SKILL.md format, categories, and how the skills refer to one another.

Use them when creating or editing email-marketing skills in this repository. They cover tasks such as deliverability, compliance, campaigns, content, growth, analytics, and email-platform operations.

They give contributors a shared structure for adding or maintaining skills without guessing where files belong or what metadata they need. They also explain the difference between SendX, an email marketing platform, and SendPost, an email infrastructure API.

How sendx/email-skills configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to sendx/email-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/sendx/email-skills/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/sendx/email-skills

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/sendx/email-skills/claude-md/github.svg)](https://agentmods.dev/instructions/sendx/email-skills/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/sendx/email-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/sendx/email-skills/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/sendx/email-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/sendx/email-skills/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 555 This file is loaded in full into every session.

When invoked 555 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00555	$0.00555
Opus 5.5	$0.00222	$0.00222
Sonnet 5.5	$0.00111	$0.00111
Haiku 4.5	$0.00056	$0.00056

Measured 2mo ago against content hash 8906e1d47431, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

email-skills CLAUDE.md 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 2mo 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.

CLAUDE.md · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Email Marketing Skills

A collection of AI agent skills for email marketing, built by SendX and SendPost.

Repo structure

skills/<skill-name>/SKILL.md — each skill is a standalone markdown file
All skills are flat: skills/<skill-name>/SKILL.md
Categories are organizational labels in the README, not filesystem directories

Skill format

Every SKILL.md has YAML frontmatter:

---
name: skill-name
description: "One sentence description"
category: deliverability | compliance | campaign | content | growth | analytics | esp-ops
---

Followed by the skill instructions in markdown.

How skills work

Each skill gives the agent specialized knowledge for one email marketing task. Skills reference each other by name (e.g., "see the smart-segmentation skill when targeting needs work").

The email-deliverability-expert-skill includes a references/ folder with supplementary docs: provider-specific tactics, shared pool management, and a warmup playbook.

Key context

SendX = email marketing platform (campaigns, automation, segmentation, analytics)
SendPost = email infrastructure API (IP management, bounce processing, deliverability monitoring)
Target audience for skills = non-technical email marketers
Skills should use plain language, avoid jargon, include real benchmarks and thresholds
Every claim should be actionable: "your bounce rate is above 2%" beats "your bounce rate is high"

Available skills

ab-testing — Email A/B testing
api-campaign-builder — SendX API campaign management
campaign-strategy — Campaign type selection
compliance-navigator — Email privacy law compliance
email-analytics — Metric interpretation and actions
email-copywriting — Subject lines, preview text, body copy
email-deliverability-expert-skill — Deliverability audit, diagnosis, and fixes (has references/)
esp-hardbounce-unlock — Hard bounce unlock evaluation
esp-malicious-behavior — Malicious sender investigation
industry-playbooks — Vertical-specific email strategies
list-growth-engine — List building with popups, forms, lead magnets
smart-segmentation — List segmentation and targeting
workflow-automation — Automated email sequences

Read the full file on GitHub · 60 lines

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.

2mo ago First seen · 60 lines · 555 tokens per session scan A 8906e1d47431

Subscribe to this mod's changes

email-skills CLAUDE.md is an instructions file published in the GitHub repository sendx/email-skills (9 stars, last pushed 3mo ago), licensed MIT. It adds 555 tokens to every session, about $0.0022 per session on Opus 5.5. 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.

agent-skills ai-skill claude compliance deliverability email-automation

email-skills CLAUDE.md next to 6 instructions from other repositories
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email-skills: Instructions file for Claude Code