Measure GTM with the metrics that matter (net developer retention, DREAM funnel) instead of vanity numbers. Use when the user has dashboards full of stars and pageviews but can't tell if go-to-market is working, or is optimizing acquisition over a leaky bucket.
Install
npx skills add AIDevGTM/gtm-cofounder --skill know-if-its-workingnpx skills add AIDevGTM/gtm-cofounder --skill know-if-its-working -a claude-code -gnpx skills add AIDevGTM/gtm-cofounder --skill know-if-its-working -a codex -ggemini skills install https://github.com/AIDevGTM/gtm-cofounder.git --path skills/15-know-if-its-workinggh skill install AIDevGTM/gtm-cofounder know-if-its-workinggit clone --depth 1 https://github.com/AIDevGTM/gtm-cofounder /tmp/AIDevGTM__gtm-cofounder
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/AIDevGTM__gtm-cofounder/skills/15-know-if-its-working ~/.claude/skills/know-if-its-working # Claude Code
cp -R /tmp/AIDevGTM__gtm-cofounder/skills/15-know-if-its-working ~/.agents/skills/know-if-its-working # Codex, Cursor, Gemini CLI, Copilot, OpenCode