How-to · Marketing & Growth · By Corey Haines (Marketing)

How to use Cold Email Writer in your AI agent

Install and use the Cold Email Writer skill in Claude Code, Cursor, Codex, Gemini CLI, OpenCode, and Windsurf — with sample prompts.

What you'll get

This skill helps you write cold outreach emails that sound human and get responses. Whether you're a founder reaching out to potential customers, a marketer running outbound campaigns, or anyone who needs to cold-email prospects, it guides you through personalization, value props, and follow-up sequences. The AI handles the copywriting craft while you focus on who you're reaching and what you're offering.

Step 1 — Get the skill source URL

The Cold Email Writer skill lives at:

Step 2 — Add it to your AI agent

Copy one of these prompts and paste it into your AI tool. The agent will fetch and install the skill for you.

Claude Code

Add the agent skill from https://github.com/coreyhaines31/marketingskills/tree/main/skills/cold-email to my project.

Cursor

Install this agent skill: https://github.com/coreyhaines31/marketingskills/tree/main/skills/cold-email

Codex

Add this skill to .codex/skills/: https://github.com/coreyhaines31/marketingskills/tree/main/skills/cold-email

Gemini CLI

Add the skill at https://github.com/coreyhaines31/marketingskills/tree/main/skills/cold-email to my .gemini/skills/ directory.

OpenCode

Install this agent skill from https://github.com/coreyhaines31/marketingskills/tree/main/skills/cold-email

Windsurf

Add this skill: https://github.com/coreyhaines31/marketingskills/tree/main/skills/cold-email

Step 3 — Try these prompts

Once the skill is installed, ask your AI things like:

  • Reaching out to potential customers or partners you've never spoken to
  • Write a prospecting email but don't know how to make it sound natural
  • Your cold emails aren't getting replies and you want to improve them
  • Setting up an outbound sales campaign and need a sequence of follow-ups

What this skill does

  • Writes cold emails that sound like they came from a real person, not a template
  • Creates multi-touch follow-up sequences with different angles for each email
  • Generates subject lines designed to get opened without sounding salesy
  • Personalizes emails based on research signals like funding, hiring, or company news
  • Optimizes for replies by keeping emails short, focused, and low-friction
Made byCorey Haines (Marketing)
CategoryMarketing & Growth