GrowthEngineX (growthenginenowoslawski) · Cold email skills

Cold Outbound Skills

Cold Outbound Skills is an open-source collection of Claude Code skills for cold email infrastructure, lead sourcing, copywriting and campaign operations, built by GrowthEngineX from patterns across 1,000+ B2B campaigns. The README describes 31 skills in one place and 32 in another, organised in five tracks, plus 19 signal playbooks in a sixth. These cover strategy, domain and inbox setup, list building (Prospeo, Google Maps, lookalike discovery), copy and sending via Smartlead, and iteration. Playbooks ship as a Claude skill, a Clay table build and a Clay CLI workflow. The README warns that the Clay table and workflow files have not been run in a live Clay workspace and should be treated as specifications. Users clone the repo, add their own API keys and start with the `/cold-email-kickoff` skill, which produces a campaign plan. Uploads to Smartlead are always saved as drafts, so the user starts campaigns manually. It is MIT-licensed with 796 stars, was created on 10 March 2026 and last pushed on 5 October 2026. There are no tagged releases.