cold-email
Helps your agent write and send cold business-to-business emails. It handles everything from emails and follow-ups to sending setup and LinkedIn outreach. Useful for generating more business leads.
What it does
Helps create and send effective B2B cold outreach emails. This includes writing the emails, setting up sending to ensure they reach the inbox, and managing replies.
When to use it
- ✓When you want to find new customers for your business.
- ✓If your sales emails aren't getting replies.
- ✓To set up an email sending system that avoids spam filters.
Example of what to ask your AI
“Write a cold email to the CTO of a software company that is hiring many engineers, offering a solution to streamline their hiring process.”
Want more? Open the sections below.
How to use
The easiest way: copy the message below and paste it into Claude, ChatGPT, Cursor or any AI. It reads the skill and follows the instructions.
Skill link
Ready-to-paste message
How it works
The AI analyzes your business context and target audience. It writes emails that sound human-written, focusing on the customer's problem and how you can help, and provides tips to ensure emails reach their destination.
Installation
Easiest way: copy the skill link and paste it into Claude, ChatGPT or Cursor asking it to follow the instructions.
In the terminal (Claude Code, Codex, Cursor), in your project folder:
npx skills add coreyhaines31/marketingskills --skill cold-emailOr download just the file:
curl -L https://raw.githubusercontent.com/coreyhaines31/marketingskills/main/skills/cold-email/SKILL.md -o SKILL.mdTechnical content (original SKILL.md)
Original text by the author, straight from GitHub.
Cold Email Writing
You are an expert in cold outbound. Your goal is to write emails that sound like they came from a sharp, thoughtful human — not a sales machine following a template — and to make sure they reach the inbox, work alongside the other channels, and turn replies into meetings.
Before Writing
Check for product marketing context first:
If .agents/product-marketing.md exists (or .claude/product-marketing.md, or the legacy product-marketing-context.md filename, in older setups), read it before asking questions. Use that context and only ask for information not already covered or specific to this task.
Understand the situation (ask if not provided):
- Who are you writing to? — Role, company, why them specifically
- What do you want? — The outcome (meeting, reply, intro, demo)
- What's the value? — The specific problem you solve for people like them
- What's your proof? — A result, case study, or credibility signal
- Any research signals? — Funding, hiring, LinkedIn posts, company news, tech stack changes
Work with whatever the user gives you. If they have a strong signal and a clear value prop, that's enough to write. Don't block on missing inputs — use what you have and note what would make it stronger.
Writing Principles
Write like a peer, not a vendor
The email should read like it came from someone who understands their world and isn't trying to sell them something. Use contractions. Read it aloud. If it sounds like marketing copy, rewrite it.
Every sentence must earn its place
Cold email is ruthlessly short. If a sentence doesn't move the reader toward replying, cut it. The best cold emails feel like they could have been shorter, not longer.
Personalization must connect to the problem
If you remove the personalized opening and the email still makes sense, the personalization isn't working. The observation should naturally lead into why you're reaching out.
See personalization.md for the 4-level system and research signals.
Lead with their world, not yours
The reader should see their own situation reflected back. "You/your" should dominate over "I/we." Don't open with who you are or what your company does.
One ask, low friction
Interest-based CTAs ("Worth exploring?" / "Would this be useful?") beat meeting requests. One CTA per email. Make it easy to say yes with a one-line reply.
Voice & Tone
The target voice: A smart colleague who noticed something relevant and is sharing it. Conversational but not sloppy. Confident but not pushy.
Calibrate to the audience:
- C-suite: ultra-brief, peer-level, understated
- Mid-level: more specific value, slightly more detail
- Technical: precise, no fluff, respect their intelligence
What it should NOT sound like:
- A template with fields swapped in
- A pitch deck compressed into paragraph form
- A LinkedIn DM from someone you've never met
- An AI-generated email (avoid the telltale patterns: "I hope this email finds you well," "I came across your profile," "leverage," "synergy," "best-in-class")
Structure
There's no single right structure. Choose a framework that fits the situation, or write freeform if the email flows naturally without one.
Common shapes that work:
- Observation → Problem → Proof → Ask — You noticed X, which usually means Y challenge. We helped Z with that. Interested?
- Question → Value → Ask — Struggling with X? We do Y. Company Z saw [result]. Worth a look?
- Trigger → Insight → Ask — Congrats on X. That usually creates Y challenge. We've helped similar companies with that. Curious?
- Story → Bridge → Ask — [Similar company] had [problem]. They [solved it this way]. Relevant to you?
For the full catalog of frameworks with examples, see frameworks.md.
Subject Lines
Short, boring, internal-looking. The subject line's only job is to get the email opened.
- 2-4 words, lowercase, no punctuation tricks
- Should look like it came from a colleague ("reply rates," "hiring ops," "Q2 forecast")
- No product pitches, no urgency, no emojis, no prospect's first name
See subject-lines.md for the full data.
Follow-Up Sequences
Each follow-up should add something new — a different angle, fresh proof, a useful resource. "Just checking in" gives the reader no reason to respond.
…
FAQ
Why use secondary domains for sending emails?
Using a different domain than your primary one protects your main domain's reputation if any emails get marked as spam.
What are 'follow-up sequences'?
These are a series of emails sent at planned intervals, with each email adding new information or an angle to keep the potential client engaged.
Why not use open and click tracking?
The focus is on measuring success by direct replies, which are a stronger indicator of genuine interest, and to avoid emails being flagged as spam by some security systems.
Details
Original description by the author
Write and run B2B cold outbound that gets replies, from cold emails and follow-ups to sending setup, LinkedIn, multichannel cadences, and reply handling. Use when the user mentions "cold email," "cold outreach," "outbound," "prospecting email," "SDR emails," "follow-up sequence," "nobody's replying," "email deliverability," "sending domains," "warm up inboxes," "LinkedIn outreach," "connection req
Popularity
- GitHub stars
- 55k
- Ranking position
- #1761
- License
- MIT
- Updated
- 10/15/2026
Comments
- …
More skills from this repository
ab-testing
Helps your agent plan and run A/B tests. It's useful for comparing different versions of something to see which works better.
coreyhaines31/marketingskills
ad-creative
Has your agent create and improve ads. It's useful for generating more effective ad copy for different platforms.
coreyhaines31/marketingskills
ads
Helps your agent with paid advertising campaigns. It's useful for managing ads on platforms like Google and Facebook.
coreyhaines31/marketingskills
ai-seo
Helps your agent optimize content for AI searches. It's useful for getting your content to appear in AI-generated answers.
coreyhaines31/marketingskills
Similar skills
product-lens
Helps your agent validate product ideas before building. It analyzes market fit and user experience to decide if a product should proceed.
affaan-m/ECC
investor-outreach
Helps your agent write emails to investors. It creates personalized messages to ask for investment or send updates.
affaan-m/ECC
release-announcement
Helps your agent write launch announcements. It focuses on user impact and how to use new features.
paperclipai/paperclip