This repository contains custom Ollama model configurations optimized for various tasks, particularly git commit message generation and general AI assistance.

Available Models

1. commit-msg-ernie - ERNIE-4.5 Commit Message Generator

Base Model: ERNIE-4.5-0.3B (Q4_K_M quantization)
Purpose: Generates conventional commit messages from git diffs
Context Window: 4096 tokens
Optimizations: Temperature 0.4, Top-P 0.9 for consistent output

2. commit-msg-gemma3 - Gemma 3 Commit Message Generator

Base Model: Gemma 3 1B
Purpose: Alternative commit message generator using Google's Gemma 3
Context Window: 4096 tokens
Optimizations: Similar parameters to ERNIE variant for consistency

3. ernie-fixed - ERNIE-4.5 General Purpose

Base Model: ERNIE-4.5-21B (IQ4_XS quantization)
Purpose: General-purpose conversational AI with improved chat template
Features: Uses ChatML-style template with proper token handling

Prerequisites

Before installing these models, ensure you have:

Ollama installed on your system
Sufficient disk space (models range from 1-15GB depending on quantization)
Internet connection for downloading base models

Install Ollama

Linux/macOS:

curl -fsSL https://ollama.ai/install.sh | sh

Windows: Download from ollama.ai

Installation Instructions

Method 1: Direct Installation from Repository

Clone the repository:

git clone https://gitea.puchstein.bayern/mpuchstein/Ollama-Modelfiles.git
cd Ollama-Modelfiles

Install individual models:

For commit message generation with ERNIE:

cd commit-msg-ernie
ollama create commit-msg-ernie -f Modelfile

For commit message generation with Gemma 3:

cd commit-msg-gemma3
ollama create commit-msg-gemma3 -f Modelfile

For general purpose ERNIE chat:

cd ernie-fixed
ollama create ernie-fixed -f Modelfile

Verify installation:

ollama list

Method 2: Individual Model Installation

You can install specific models without cloning the entire repository:

Download specific Modelfile:

# Example for commit-msg-ernie
wget https://gitea.puchstein.bayern/mpuchstein/Ollama-Modelfiles/raw/branch/main/commit-msg-ernie/Modelfile
ollama create commit-msg-ernie -f Modelfile

Usage Examples

Commit Message Generation

Using ERNIE variant:

# Generate commit message from git diff
git diff --cached | ollama run commit-msg-ernie

Using Gemma 3 variant:

# Alternative commit message generator
git diff --cached | ollama run commit-msg-gemma3

General Chat (ERNIE-Fixed)

# Start interactive chat session
ollama run ernie-fixed

# Or single query
echo "Explain quantum computing" | ollama run ernie-fixed

Integration with Git Workflow

Automated Commit Messages

Create a git alias for automated commit message generation:

# Add to your ~/.gitconfig
git config --global alias.aicommit '!f() { git add .; msg=$(git diff --cached | ollama run commit-msg-ernie); git commit -m "$msg"; }; f'

Usage:

# Stage changes and generate commit automatically
git aicommit

Git Hook Integration

Create a prepare-commit-msg hook:

#!/bin/sh
# .git/hooks/prepare-commit-msg

if [ "$2" = "" ]; then
    # Only generate for manual commits (not merges, etc.)
    COMMIT_MSG=$(git diff --cached | ollama run commit-msg-ernie)
    if [ -n "$COMMIT_MSG" ]; then
        echo "$COMMIT_MSG" > "$1"
    fi
fi

Make it executable:

chmod +x .git/hooks/prepare-commit-msg

Model Specifications

Model	Base Model	Size	Context	Temperature	Use Case
commit-msg-ernie	ERNIE-4.5-0.3B	~300MB	4096	0.4	Git commits
commit-msg-gemma3	Gemma 3 1B	~1GB	4096	0.4	Git commits
ernie-fixed	ERNIE-4.5-21B	~15GB	Default	Default	General chat

Customization

Modifying System Prompts

To customize the behavior, edit the SYSTEM section in any Modelfile:

SYSTEM """
Your custom system prompt here...
"""

Then recreate the model:

ollama create your-model-name -f Modelfile

Parameter Tuning

Adjust model parameters for different behaviors:

Temperature: Lower (0.1-0.4) for consistency, higher (0.7-1.0) for creativity
Top-P: Controls nucleus sampling (0.9 recommended)
Context Length: Increase for larger diffs/inputs

Troubleshooting

Common Issues

Model download fails:

Check internet connection
Verify Hugging Face model availability
Try downloading base model separately: ollama pull gemma3:1b

Out of memory errors:

Use smaller quantizations (Q4_K_M instead of F16)
Reduce context window
Close other applications

Poor commit message quality:

Ensure git diff has meaningful changes
Check that changes are staged (git add)
Consider adjusting temperature parameter

Performance Tips

GPU Acceleration: Ollama automatically uses GPU if available
Model Caching: Models stay loaded in memory for faster subsequent calls
Batch Processing: Process multiple diffs efficiently by keeping model loaded

Contributing

To contribute improvements:

Fork the repository
Create feature branch
Test your changes
Submit pull request with conventional commit messages

License

This repository contains model configurations and prompts. Refer to individual base model licenses for usage restrictions.

Ollama - Local LLM runtime
Conventional Commits - Commit message specification
ERNIE Models - Baidu's ERNIE model family

README.md

Ollama Model Files Collection