heartmula

heartmula is a skill for Claude Code, Codex from graniet/kheish. It costs 31 tokens per session (1,885 once invoked), scanned A, a copy of heartmula, Apache-2.0.

An open-source group of music-generation models that creates songs from lyrics and style tags.

In plain words
What is it for?
Use it to generate multilingual music, reconstruct audio, transcribe lyrics, or align audio with text.
Why use it?
It lets developers run an open-source alternative to hosted music generators for creating complete songs from text input.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to generate multilingual music, reconstruct audio, transcribe lyrics, or align audio with text.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/graniet/kheish/heartmula
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.

Any agent
npx skills add graniet/kheish --skill heartmula
Clone the repo
git clone --depth 1 https://github.com/graniet/kheish

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 heartmula

README.md
[![agentmods](https://agentmods.dev/badge/skills/graniet/kheish/heartmula/github.svg)](https://agentmods.dev/skills/graniet/kheish/heartmula)
Your own site
<a href="https://agentmods.dev/skills/graniet/kheish/heartmula"><img src="https://agentmods.dev/badge/skills/graniet/kheish/heartmula/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for heartmula

Your own site · 80×15
<a href="https://agentmods.dev/skills/graniet/kheish/heartmula"><img src="https://agentmods.dev/badge/skills/graniet/kheish/heartmula.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,885 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 80% copy Near-identical to another mod 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 5.1 $0.00031 $0.01885
Opus 5 $0.00015 $0.00942
Sonnet 5 $0.00006 $0.00377
Haiku 4.5 $0.00003 $0.00188

Measured 9d ago against content hash 9245d88ae2cb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

heartmula 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 9d 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.

Origin

This is a copy

80% identical to heartmula — 37 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/media/heartmula/SKILL.md · 193 lines

How it starts

The opening of the file, as written. The whole thing — 193 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Kheish Compatibility

This skill is repo-local and stays inactive until explicitly activated.

When the original instructions refer to legacy tool names, use these Kheish mappings:

  • terminal => bash
  • web_extract => web_fetch, plus web_search when discovery is needed
  • search_files => grep_search and glob_search
  • browser_* tools require a browser-capable surfaced tool or MCP; if none is available, use the closest available surface and say so explicitly

When the instructions mention local helper files, resolve them from ${KHEISH_SKILL_DIR}.

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. 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

Hardware Requirements

  • Minimum: 8GB VRAM with --lazy_load true (loads/unloads models sequentially)
  • Recommended: 16GB+ VRAM for comfortable single-GPU usage
  • Multi-GPU: Use --mula_device cuda:0 --codec_device cuda:1 to split across GPUs
  • 3B model with lazy_load peaks at ~6.2GB VRAM

Installation Steps

1. Clone Repository

cd ~/  # or desired directory
git clone https://github.com/HeartMuLa/heartlib.git
cd heartlib

2. Create Virtual Environment (Python 3.10 required)

uv venv --python 3.10 .venv
. .venv/bin/activate
uv pip install -e .

3. Fix Dependency Compatibility Issues

IMPORTANT: As of Feb 2026, the pinned dependencies have conflicts with newer packages. Apply these fixes:

Read the full file on GitHub · 193 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. 9d ago First seen · 193 lines · 31 tokens per session scan A 9245d88ae2cb

Subscribe to this mod's changes

heartmula is a skill published in the GitHub repository graniet/kheish (227 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 31 tokens to every session and 1,885 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 80% identical to heartmula, differing in 37 lines, and is treated as a copy.

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