Structured idea generation + multi-LLM debate for the product-owner stage. Diverge (generate genuinely different bets), debate (a 4-persona panel on 4 models argues over 2 rounds), converge (synthesize a recommendation). Used by product-owner before architect; available to architect for design-space exploration.
Install
npx skills add avelikiy/great_cto --skill brainstormingnpx skills add avelikiy/great_cto --skill brainstorming -a claude-code -gnpx skills add avelikiy/great_cto --skill brainstorming -a codex -ggemini skills install https://github.com/avelikiy/great_cto.git --path skills/brainstorminggh skill install avelikiy/great_cto brainstorminggit clone --depth 1 https://github.com/avelikiy/great_cto /tmp/avelikiy__great_cto
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/avelikiy__great_cto/skills/brainstorming ~/.claude/skills/brainstorming # Claude Code
cp -R /tmp/avelikiy__great_cto/skills/brainstorming ~/.agents/skills/brainstorming # Codex, Cursor, Gemini CLI, Copilot, OpenCode