# ai-music

The skill picks the right RunComfy music model for your intent and builds the runcomfy run call, from cheap background tracks to premium vocal cuts.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 368500 installs · ★ 60
- Author: prime-skills
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/prime-skills/runcomfy-agent-skills/tree/HEAD/ai-music/SKILL.md
- Updated: 2026-05-15
- HTML: https://affpapa.org/en/nevibecode/skills/ai-music

## What it does

The skill reads your request and routes it. Premium vocal work goes to ElevenLabs AI Music Generation: 44.1 kHz stereo, 5 s to 5 min, $0.0083/s. Background music, jingles and drafts go to ACE Step or ACE Step 1.5 from StepFun-AI, open-weights at $0.0002–0.0003/s — roughly 27× cheaper. The 1.5 variant adds vocal support in 50+ languages.

Editing an existing track is ACE Step only, since ElevenLabs has no edit endpoints. `audio-inpaint` regenerates a time range inside a track using `start_time` and `end_time`, which is how you fix a bad chorus or swap a bridge. `audio-outpaint` extends a track before or after via `extend_before_duration` and `extend_after_duration`; going past 4 minutes total in one call does not work, so you chain calls instead.

Under the hood it is plain CLI calls: `runcomfy run <vendor>/<model>/<endpoint>` with JSON in `--input` and a folder in `--output-dir`. Style and lyrics split differently per model. ElevenLabs reads a single `prompt` with section markers, while ACE Step wants style in `tags` and words in `lyrics`. You need `runcomfy login` before the first run, or the `RUNCOMFY_TOKEN` env var in CI and containers. The CLI installs globally with `npm i -g @runcomfy/cli`, or runs without installing through `npx -y @runcomfy/cli`.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add prime-skills/runcomfy-agent-skills --skill ai-music -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/ai-music/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/ai-music/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add prime-skills/runcomfy-agent-skills --skill ai-music -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/ai-music/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add prime-skills/runcomfy-agent-skills --skill ai-music -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/ai-music/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install prime-skills/runcomfy-agent-skills ai-music
```

2. **Manually: put the files in place**
- File: `.github/skills/ai-music/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add prime-skills/runcomfy-agent-skills --skill ai-music -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/prime-skills/runcomfy-agent-skills --path ai-music
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/ai-music/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add prime-skills/runcomfy-agent-skills --skill ai-music -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/prime-skills/runcomfy-agent-skills/tree/HEAD/ai-music/SKILL.md

## When to use it
- generate a vocal track for an ad spot
- build a background music library on a small budget
- write a song with lyrics in several languages
- regenerate a bad chorus inside an existing track
- stretch a 30 s draft into a 2 min cut

## Example prompts
- Generate a premium vocal track for an ad spot with ElevenLabs
- Make cheap 60-second background music for a game, instrumental only
- Inpaint the chorus from 20 s to 40 s in `song.mp3`

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: e94bec31dbfb92ea.

BEGIN THIRD-PARTY FILE e94bec31dbfb92ea
````text
---
name: ai-music
displayName: "AI Music"
allowed-tools: Bash(runcomfy *)
description: >
  Generate AI music on RunComfy via the `runcomfy` CLI — a smart router
  across the music-model catalog. Routes to ElevenLabs AI Music
  Generation (premium 44.1 kHz stereo vocal tracks, 5 s–5 min, $0.0083/s)
  and ACE Step / ACE Step 1.5 (StepFun-AI open-weights, tag-driven
  composition, multilingual lyrics, $0.0002–0.0003/s, ~27× cheaper),
  plus ACE Step audio-inpaint (regenerate a time range inside an
  existing track) and ACE Step audio-outpaint (extend a track before
  or after). Picks the right model for the user's actual intent —
  premium vocal hook, cheap background music library, multilingual
  pop song, repair a bad chorus, lengthen a 30 s draft into a 2 min
  cut — and ships each model's documented prompting patterns plus the
  minimal `runcomfy run` invoke. Triggers on "generate music",
  "make a song", "AI music", "background music", "instrumental track",
  "soundtrack", "jingle", "theme music", "royalty-free music",
  "compose", "music with lyrics", "extend music", "fix this song",
  "inpaint music", or any explicit ask to generate or edit music.
homepage: https://www.runcomfy.com
license: MIT
---

# AI Music

Generate AI music on RunComfy through one CLI — vocal songs, instrumentals, jingles, game loops, multilingual covers. This skill picks the right model from the RunComfy catalog based on the user's actual intent and ships the documented prompting patterns + the exact `runcomfy run` invoke for each.

[runcomfy.com](https://www.runcomfy.com/?utm_source=skills.sh&utm_medium=skill&utm_campaign=ai-music) · [Audio models](https://www.runcomfy.com/models?utm_source=skills.sh&utm_medium=skill&utm_campaign=ai-music) · [CLI docs](https://docs.runcomfy.com/cli/introduction?utm_source=skills.sh&utm_medium=skill&utm_campaign=ai-music)

## Install this skill

```bash
npx skills add agentspace-so/runcomfy-agent-skills --skill ai-music -g
```

## Powered by the RunComfy CLI

**Step 1 — install** (one of, see the `runcomfy-cli` skill for details):

```bash
npm i -g @runcomfy/cli         # global install
npx -y @runcomfy/cli --version # zero-install
```

**Step 2 — sign in** (or set `RUNCOMFY_TOKEN` env var in CI / containers):

```bash
runcomfy login
```

**Step 3 — generate music**:

```bash
runcomfy run <vendor>/<model>/<endpoint> \
  --input '{"prompt": "...", ...}' \
  --output-dir ./out
```
````
END THIRD-PARTY FILE e94bec31dbfb92ea

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First 2454 of 14660 bytes. © prime-skills · MIT · https://github.com/prime-skills/runcomfy-agent-skills/tree/HEAD/ai-music/SKILL.md

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---
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