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weeklyfoo #162 is here: your weekly digest of all webdev news you need to know! This time you'll find 38 valuable links in 5 categories! Enjoy!

🚀 Read it!

Why and how to port your entire codebase to Rust : Microsoft Distinguished Engineer Stephen Toub on rewriting the 400,000-line GitHub Copilot runtime in Rust with agents, rollout strategy and catching regressions by Ryan Peterman / rust , ai , rewrites / 65 min read

📰 Good to know

Frontier quality at 1% of the cost : Airbnb fine-tuned a 2B-parameter model to match frontier models on a production policy classifier at 35 ms median latency by Airbnb Engineering / ai , llm , performance / 9 min read

Inside GitHub's new Git storage architecture : Rubicon separates immutable Git objects in blob storage from a replicated reference log so compute and storage scale independently by GitHub Blog / git , architecture , ai / 29 min read

Design systems should be fast by default :…