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Grit: Rewriting Git in Rust with Agents

blog.gitbutler.com

June 9, 2026

18 min read

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56/100

Summary

Grit is a project aimed at rewriting Git in Rust, focusing on creating a library-based architecture. The initiative draws inspiration from Anthropic's experiment with agents generating a functioning C compiler.

Key Takeaways

Grit is a new implementation of Git, rewritten from scratch in Rust, designed as a library that passes over 99% of the Git test suite.
The project utilizes a swarm of agents to develop the software, inspired by Anthropic's approach to creating a C compiler.
Grit is not yet fully tested for real-world use and may produce incorrect results, but it aims to address limitations of the original C implementation of Git.
The goal of Grit is to create a modular, reentrant, and linkable core library that can interact with Git repositories more effectively than the traditional Git architecture.

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Community Sentiment

Mixed

Positives

The decision to use MIT licensing instead of GPL could encourage broader community contributions, which is essential for the project's growth and sustainability.
The architectural changes aimed at making the implementation memory safe demonstrate a commitment to improving software reliability, which is crucial for user trust.

Concerns

Concerns about the project's long-term viability are evident, with speculation that it could fall into maintenance mode if adoption is low.
The existence of other Git-in-Rust projects like Gitoxide raises doubts about Grit's uniqueness and potential for success in a competitive landscape.