HeartMuLa

by NousResearch

HeartMuLa is an AI Engineering skill for Claude Code, published by NousResearch in hermes-agent.

229.7K stars45.3K forkson NousResearch/hermes-agentAdded 2026/08/13Repository updated 2026/08/13

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aiai-agentai-agentsanthropicchatgptclaudeclaude-codecodexhermeshermes-agentllmnous-researchopenai

Install in seconds

Install HeartMuLa

Copy HeartMuLa into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/NousResearch/hermes-agent/tree/main/optional-skills/creative/heartmula ~/.claude/skills/heartmula

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/NousResearch/hermes-agent.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: optional-skills/creative/heartmula/SKILL.md in NousResearch/hermes-agent
Installs to: ~/.claude/skills/heartmula
Collection: One of 24 skills cataloged from this repository
Category: AI Engineering — 2451 skills

What HeartMuLa does

HeartMuLa generates songs from lyrics and style tags using open-source music foundation models. Use it when you need a local or open-source alternative to commercial AI music services like Suno.

HeartMuLa is cataloged under AI Engineering on DirSkills. HeartMuLa comes from a repository tagged ai, ai-agent, ai-agents, anthropic and chatgpt.

Documentation

README

Excerpt

HeartMuLa - Open-Source Music Generation

Overview

HeartMuLa is a family of open-source music foundation models (Apache-2.0) that generates music conditioned on lyrics and tags, with multilingual support. Generates full songs from lyrics + tags. Comparable to Suno for open-source. Includes:

HeartMuLa - Music language model (3B/7B) for generation from lyrics + tags
HeartCodec - 12.5Hz music codec for high-fidelity audio reconstruction
HeartTranscriptor - Whisper-based lyrics transcription
HeartCLAP - Audio-text alignment model

When to Use

User wants to generate music/songs from text descriptions
User wants an open-source Suno alternative
User wants local/offline music generation
User asks about HeartMuLa, heartlib, or AI music generation

This is the opening of the README. Read the full README on GitHub.

Frequently asked about HeartMuLa

What else does NousResearch publish alongside HeartMuLa?
HeartMuLa is one of 24 skills that DirSkills catalogs from NousResearch/hermes-agent, the repository it ships in. Its siblings there include 1-3-1 Communication Rule, Antigravity CLI and Article Illustrator. Each one is a separate skill with its own page in this directory, installs the same way HeartMuLa does, and is maintained by NousResearch in that same repository. The rest of the collection is listed on the NousResearch/hermes-agent page.
How does HeartMuLa compare to other AI Engineering skills?
HeartMuLa ranks #14 by stars among the 2451 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of HeartMuLa against them. Open each page to compare what they document and how they install.