Creates and fixes Unity 2D physics in both systems, 2D Physics Core and the legacy Rigidbody 2D system, for any 2D physics question even if neither is named. Not for 3D physics.
Install
npx skills add Unity-Technologies/unity-agent-plugin --skill create-2d-physicsnpx skills add Unity-Technologies/unity-agent-plugin --skill create-2d-physics -a claude-code -gnpx skills add Unity-Technologies/unity-agent-plugin --skill create-2d-physics -a codex -ggemini skills install https://github.com/Unity-Technologies/unity-agent-plugin.git --path skills/create-2d-physicsgh skill install Unity-Technologies/unity-agent-plugin create-2d-physicsgit clone --depth 1 https://github.com/Unity-Technologies/unity-agent-plugin /tmp/Unity-Technologies__unity-agent-plugin
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/Unity-Technologies__unity-agent-plugin/skills/create-2d-physics ~/.claude/skills/create-2d-physics # Claude Code
cp -R /tmp/Unity-Technologies__unity-agent-plugin/skills/create-2d-physics ~/.agents/skills/create-2d-physics # Codex, Cursor, Gemini CLI, Copilot, OpenCode