Generates implementation plans with code reuse analysis, architecture design, and complexity estimation during the /plan phase. Use when planning feature implementation, analyzing code reuse opportunities, or designing system architecture after specification phase completes. Integrates with 8 project documentation files for constraint extraction. (project)
Install
npx skills add marcusgoll/Spec-Flow --skill planning-phasenpx skills add marcusgoll/Spec-Flow --skill planning-phase -a claude-code -gnpx skills add marcusgoll/Spec-Flow --skill planning-phase -a codex -ggemini skills install https://github.com/marcusgoll/Spec-Flow.git --path .claude/skills/planning-phasegh skill install marcusgoll/Spec-Flow planning-phasegit clone --depth 1 https://github.com/marcusgoll/Spec-Flow /tmp/marcusgoll__Spec-Flow
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/marcusgoll__Spec-Flow/.claude/skills/planning-phase ~/.claude/skills/planning-phase # Claude Code
cp -R /tmp/marcusgoll__Spec-Flow/.claude/skills/planning-phase ~/.agents/skills/planning-phase # Codex, Cursor, Gemini CLI, Copilot, OpenCode