Original sourceAI Weekly
Summary
OpenAI revealed that its main storage service Habitat was rewritten from Python to Rust in the second quarter of 2026, heavily using Codex and GPT-5.5 for automation. The rewritten version handles about 95% of production traffic, serving ChatGPT, Codex, and other products; Habitat now stores over 5…
Key points
- Engineering teams evaluating large-scale rewrites or agent-assisted migrations can see the real-world performance and scope of AI collaboration.
- This is a rare public case of pushing agent-assisted rewriting into core infrastructure carrying the majority of traffic.
- Engineering leaders can use it to assess the feasibility of AI-agent-assisted language migration and the accompanying review and testing burden.
Editorial note
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