Generate, inpaint, and outpaint music with ACE Step on RunComfy via the `runcomfy` CLI. ACE Step is StepFun-AI's open-weights music foundation model — tag-driven composition (genre, mood, instruments), multilingual lyrics with section markers, 5 s to 4 min stereo output, $0.0002–0.0003 per second (≈ 27× cheaper than ElevenLabs Music).
Install
npx skills add prime-skills/runcomfy-agent-skills --skill ace-stepnpx skills add prime-skills/runcomfy-agent-skills --skill ace-step -a claude-code -gnpx skills add prime-skills/runcomfy-agent-skills --skill ace-step -a codex -ggemini skills install https://github.com/prime-skills/runcomfy-agent-skills.git --path ace-stepgh skill install prime-skills/runcomfy-agent-skills ace-stepgit clone --depth 1 https://github.com/prime-skills/runcomfy-agent-skills /tmp/prime-skills__runcomfy-agent-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/prime-skills__runcomfy-agent-skills/ace-step ~/.claude/skills/ace-step # Claude Code
cp -R /tmp/prime-skills__runcomfy-agent-skills/ace-step ~/.agents/skills/ace-step # Codex, Cursor, Gemini CLI, Copilot, OpenCode