acestep

acestep is a skill for Claude Code, Codex from digitalsamba/claude-code-video-toolkit. It costs 84 tokens per session (3,500 once invoked), scanned A, original, MIT.

A tool for creating music and audio tracks from text instructions, including background music, vocals, covers, separated instrument parts, edits, and continuations. It uses ACE-Step 1.5 through cloud services or optional self-hosted setups.

In plain words
What is it for?
It helps make video soundtracks, background music, jingles, vocal tracks, and audio stems. It can also extend existing music or repaint parts of a track.
Why use it?
It removes the need to compose or edit every audio part by hand. You can create drafts or variations without running a graphics processor locally when using the default cloud service.

Skill for Claude CodeCodex

About the project

Claude Code Video Toolkit is a workspace that lets Claude Code create videos by producing scripts, voiceovers, music, visuals, and rendered MP4 files. It is for developers using AI-assisted, programmatic video production with tools such as Remotion and open-source media models. The catalogue entries provide commands, skills, instructions, and settings for this workflow.

digitalsamba/claude-code-video-toolkit · 2,041 stars · on GitHub

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/digitalsamba/claude-code-video-toolkit/acestep
Any agent
npx skills add digitalsamba/claude-code-video-toolkit --skill acestep
Clone the repo
git clone --depth 1 https://github.com/digitalsamba/claude-code-video-toolkit

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for acestep

README.md
[![agentmods](https://agentmods.dev/badge/skills/digitalsamba/claude-code-video-toolkit/acestep.svg)](https://agentmods.dev/skills/digitalsamba/claude-code-video-toolkit/acestep)
Your own site
<a href="https://agentmods.dev/skills/digitalsamba/claude-code-video-toolkit/acestep"><img src="https://agentmods.dev/badge/skills/digitalsamba/claude-code-video-toolkit/acestep.svg" alt="Measured on agentmods" height="20"></a>
Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,500 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00084 $0.03500
Opus 5 $0.00042 $0.01750
Sonnet 5 $0.00017 $0.00700
Haiku 4.5 $0.00008 $0.00350

Measured 5d ago against content hash b71068ec3978, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

acestep scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/acestep/SKILL.md · 346 lines

How it starts

The opening of the file, as written. The whole thing — 346 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ACE-Step 1.5 Music Generation

Open-source music generation via tools/music_gen.py.

Cloud providers:

  • acemusic (default) — Official ACE-Step cloud API with XL Turbo (4B) model + 5Hz LM thinking mode. Free API key from acemusic.ai/api-key. No GPU required.
  • modal — Self-hosted ACE-Step 2B Turbo on Modal. Requires MODAL_MUSIC_GEN_ENDPOINT_URL.
  • runpod — Self-hosted ACE-Step 2B Turbo on RunPod. Requires RUNPOD_ACESTEP_ENDPOINT_ID.

Setup

# acemusic (recommended — free, best quality, no GPU)
echo "ACEMUSIC_API_KEY=your_key" >> .env
# Get key at https://acemusic.ai/api-key

# Self-hosted (optional fallback)
uv run tools/music_gen.py --setup             # RunPod
uv run modal deploy docker/modal-music-gen/app.py    # Modal

Quick Reference

# Basic generation (uses acemusic XL Turbo by default)
uv run tools/music_gen.py --prompt "Upbeat tech corporate" --duration 60 --output bg.mp3

# Generate 4 variations, pick the best
uv run tools/music_gen.py --prompt "Calm ambient piano" --duration 30 --variations 4 --output ambient.mp3

# Fast mode (disable thinking)
uv run tools/music_gen.py --no-thinking --prompt "Quick draft" --duration 30 --output draft.mp3

# With musical control
uv run tools/music_gen.py --prompt "Calm ambient piano" --duration 30 --bpm 72 --key "D Major" --output ambient.mp3

# Scene presets (video production)
uv run tools/music_gen.py --preset corporate-bg --duration 60 --output bg.mp3
uv run tools/music_gen.py --preset tension --duration 20 --output problem.mp3
uv run tools/music_gen.py --preset cta --brand digital-samba --duration 15 --output cta.mp3

# Vocals with lyrics
uv run tools/music_gen.py --prompt "Indie pop jingle" --lyrics "[verse]\nBuild it better\nShip it faster" --duration 30 --output jingle.mp3

# Cover / style transfer
uv run tools/music_gen.py --cover --reference theme.mp3 --prompt "Jazz piano version" --duration 60 --output jazz_cover.mp3

# Repaint a weak section
uv run tools/music_gen.py --repaint --input track.mp3 --repaint-start 15 --repaint-end 25 --prompt "Guitar solo" --output fixed.mp3

# Continue from existing audio
uv run tools/music_gen.py --continuation --input track.mp3 --prompt "Continue with jazz piano" --output extended.mp3

# Stem extraction
uv run tools/music_gen.py --extract vocals --input mixed.mp3 --output vocals.mp3

# Fall back to self-hosted
uv run tools/music_gen.py --cloud modal --prompt "Background music" --duration 60 --output bg.mp3

Read the full file on GitHub · 346 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 346 lines · 84 tokens per session scan A b71068ec3978

Subscribe to this mod's changes

acestep is a skill published in the GitHub repository digitalsamba/claude-code-video-toolkit (2,041 stars, last pushed 4d ago), licensed MIT. It adds 84 tokens to every session and 3,500 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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