Cold Email Writer: Install, Source and Security | FunnelSlayer
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Cold Email Writer

Published by onstartups in builder-plugins

Review recommended2 installs

What this skill does

Writes a concise, personalized cold outreach email with subject-line options from a prospect and an offer, using light research for a relevant opener. Use when the user asks to "write a cold email", "draft outreach to this prospect", "cold email for [company]", "first-touch email".

Add Cold Email Writer to your agent

Review the source and files first. When you are ready, copy the prompt instruction or use the CLI command supported by your environment.

Install with a prompt

Paste this into a compatible coding agent:

add this skill "cold-email-writer" from https://github.com/onstartups/builder-plugins

Install with the CLI

Run this command in a controlled environment after reviewing the repository:

npx skills add https://github.com/onstartups/builder-plugins --skill cold-email-writer

Skill instructions

Cold Email Writer

What it does

Produces a short, specific cold email that earns a reply — personalized opener, one clear value point, one ask — plus subject-line options to test.

When to use

  • "Write a cold email to [prospect]", "draft first-touch outreach", "cold email for this list".

Inputs

Prospect (name/role/company) and the offer or reason for reaching out. Optional: tone, desired CTA, sender details.

Workflow

  1. Find a hook. One relevant, specific detail about the prospect or company (role, recent news, a likely pain) from HubSpot context or quick web research.
  2. Frame the value in one sentence tied to that hook — their outcome, not your features.
  3. Write the email: under ~90 words, conversational, one ask, easy yes.
  4. Add 2-3 subject lines of different styles (curiosity, direct, value).
  5. Output the email + subjects, paste-ready.

Output

**Subject options:** [A] / [B] / [C]

[Opener with the specific hook]
[One value sentence]
[One clear, low-friction ask]
[Sign-off]

Notes

  • No verifiable hook? Use a credible role-based pain and keep the personalization honest — never fabricate a "saw your post" claim.
  • One email, one ask. Sequences belong in follow-up-email-sequence-writer.

Files included

  • SKILL.md

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