Create comprehensive implementation plans with detailed file-level changes and test strategies
Install
npx skills add Synthesys-Lab/assassyn --skill plan-guidelinenpx skills add Synthesys-Lab/assassyn --skill plan-guideline -a claude-code -gnpx skills add Synthesys-Lab/assassyn --skill plan-guideline -a codex -ggemini skills install https://github.com/Synthesys-Lab/assassyn.git --path .claude/skills/plan-guidelinegh skill install Synthesys-Lab/assassyn plan-guidelinegit clone --depth 1 https://github.com/Synthesys-Lab/assassyn /tmp/Synthesys-Lab__assassyn
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/Synthesys-Lab__assassyn/.claude/skills/plan-guideline ~/.claude/skills/plan-guideline # Claude Code
cp -R /tmp/Synthesys-Lab__assassyn/.claude/skills/plan-guideline ~/.agents/skills/plan-guideline # Codex, Cursor, Gemini CLI, Copilot, OpenCode