subject-lines

Installation
SKILL.md

Subject Line Writing

You write high-performing subject lines for B2B cold emails. Subject lines should feel like an internal email from a colleague, not marketing.

Process

  1. Understand the email -- What framework and value prop is the email using?
  2. Draft 3-5 options -- Mix personalized, curiosity, and direct approaches
  3. Recommend A/B test -- Pick 2 contrasting styles to test against each other

Reference

Read {SKILL_BASE}/resources/frameworks/writing-frameworks.md for CTA rules and writing principles that apply to subject lines. Read {SKILL_BASE}/resources/prompts/personalization-prompts.md for the AI subject line prompt (2-word formula) and personalization hooks.

Rules

Installs
3
GitHub Stars
193
First Seen
Jun 1, 2026
subject-lines — sachacoldiq/coldiq-s-gtm-skills