Source
When the agent reaches for it
The agent keeps every installed skill's description in view and loads the full instructions when a request matches. This is the description it reads:
Write B2B cold emails and follow-up sequences that get replies. Use when the user wants to write cold outreach emails, prospecting emails, cold email campaigns, sales development emails, or SDR emails. Also use when the user mentions "cold outreach," "prospecting email," "outbound email," "email to leads," "reach out to prospects," "sales email," "follow-up email sequence," "nobody's replying to my emails," or "how do I write a cold email." Covers subject lines, opening lines, body copy, CTAs, personalization, and multi-touch follow-up sequences. For warm/lifecycle email sequences, see emails. For sales collateral beyond emails, see sales-enablement.
What the instructions cover
The sections of its SKILL.md, in order.
- Before Writing
- Writing Principles
- Voice & Tone
- Structure
- Subject Lines
- Follow-Up Sequences
- Quality Check
- What to Avoid
- Data & Benchmarks
- Related Skills
What ships with it
Besides SKILL.md, the folder carries these. The agent opens them only when a step in the instructions calls for one.
-
evals/ -
references/
Install the cold email skill
For Claude Code, run this in a terminal. It comes from the publisher's own instructions.
npx skills add coreyhaines31/marketingskills --skill cold-email -a claude-codeLicense: MIT.
In Longwave, add Marketing Skills from the marketplace. It installs all 50 of its skills, and your Claude Code, Codex and OpenCode threads can use them.