kerbelp/metatron

Overview

Metatron is a self-hosted system that captures a codebase's real implementation decisions as structured priors. It serves these priors to coding agents over MCP (Model Context Protocol). The goal is to make an agent write code like a senior engineer who already knows the codebase.

Best for

Best for
Teams with established codebases who want to encode institutional knowledge for AI coding agents

Use cases

• Capturing preferred patterns and conventions from a codebase
• Providing coding agents with context on past design decisions
• Documenting rejected approaches and edge cases for future reference

How to use

Install

curl -sSf https://getmetatron.com/install.sh | sh

Tools exposed

• git
• python

Tested with

Claude Opus 4.8, Fable 5 (1M)

Notes

Metatron is a self-hosted system that captures a codebase’s real implementation decisions as structured priors. It serves these priors to coding agents over MCP (Model Context Protocol). The goal is to make an agent write code like a senior engineer who already knows the codebase.

13 stars on GitHub. Last updated 2026-06-07. Licensed MIT.

Use cases

• Capturing preferred patterns and conventions from a codebase
• Providing coding agents with context on past design decisions
• Documenting rejected approaches and edge cases for future reference

Pros

• Self-hosted ensures codebase data stays private and under your control
• Captures nuanced decisions including edge cases and rejected approaches
• Integrates with MCP to give agents context-aware guidance

Cons

• Very early stage project with limited adoption and documentation
• Requires self-hosting and manual setup of prior capture
• The tool itself is written in Python, which may limit extensibility for non-Python environments

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.