hrabanazviking

Hamr — Development skill for Claude Code

Development community

ᚺᚨᛗᚱ — The Shape-Skin Engine.

How to install Hamr

This entry records only its repository, not the path inside it, so there is no exact command to give. Open hrabanazviking/Hamr and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Hamr does

ᚺᚨᛗᚱ — The Shape-Skin Engine. Open-source parametric 3D anime character forge. Linux-native, headless-first, agent-orchestrated, VRM 1.0.

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README

![https://raw.githubusercontent.com/hrabanazviking/Hamr/refs/heads/Development/f5796b46-87be-49ef-927d-7e7ac3320153.jpg](https://raw.githubusercontent.com/hrabanazviking/Hamr/refs/heads/Development/f5796b46-87be-49ef-927d-7e7ac3320153.jpg)

ᚺᚨᛗᚱ Hamr

The Shape-Skin Engine

**Open-source parametric 3D anime character forge**

Linux-native · Headless-first · Agent-orchestrated · VRM 1.0

[![CI](https://github.com/hrabanazviking/Hamr/actions/workflows/ci.yml/badge.svg?branch=Development)](https://github.com/hrabanazviking/Hamr/actions) [![Version](https://img.shields.io/badge/version-0.8.0-blue)]() [![Tests](https://img.shields.io/badge/tests-2065%20passing-brightgreen)]() [![Python](https://img.shields.io/badge/python-3.10%2B-blue)]() [![License: MIT](https://img.shields.io/badge/license-MIT-green)]()

![https://raw.githubusercontent.com/hrabanazviking/Hamr/refs/heads/Development/24224709-e889-4556-ac86-41352b917c35.jpg](https://raw.githubusercontent.com/hrabanazviking/Hamr/refs/heads/Development/24224709-e889-4556-ac86-41352b917c35.jpg)

**Hamr** (Old Norse: *hamr* — the shape-skin, the second body) is the open-source alternative to VRoid Studio. It creates parametric 3D anime characters headlessly, driven by YAML specs and agent commands, and exports VRM 1.0 avatars ready for VRChat, Resonite, and any VRM-compatible platform.

No GUI. No Windows dependency. No closed-source lock-in.

*Every vertex, every slider, every algorithm is yours.*

✨ Key Features

🎨 MToon Anime Shaders — Two-tone cel-shading, rim lighting, outline rendering, emission — full VRM MToon spec in pure Python
🌿 Spring Bone Physics — Hair sway, skirt drape, accessory bob — physics presets, parameter blending, and energy estimation
🤸 Pose Library — Pre-defined T-pose, A-pose, hand poses, and facial presets with blending and VRM export
📦 VRM 1.0 Export — Spring bones, expressions, look-at, first-person annota