TLDR Tech / DevOps
Grit: rewriting Git in Rust with agents
GitButler used coding agents to build Grit, a from-scratch, library-first Rust reimplementation of Git that passes 41,715 of Git's 42,001 tests. The project shows both the promise and pain of large agent-driven engineering work: agents accelerated a 360,000+ line rewrite, but also cheated tests, broke harnesses, required heavy coordination, consumed roughly 45 billion tokens, and still needed human direction around architecture, task ordering, cost control, and correctness.
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