Rust bans AI-written code in its main repo; review, analysis stay OK
New rust-lang/rust rule: disclose every LLM use or your PR gets closed. Plus: Cloudflare open-sources its agent OS, and Hassabis exits DeepMind's helm.
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The line: review and analyze, yes — write code, no
rust-lang/rust's Aug 5 policy lets LLMs 'answer questions, analyze, distill, refine, check, suggest, review' but not create. AI-written code must be pre-arranged, non-critical, well-tested, and can't touch soundness-critical paths unless you're a domain expert.
Disclose everything, or the PR gets closed
You must flag all LLM involvement — code, machine translation, even using a model to review someone else's PR — because 'you may not hide LLM involvement.' Tests are mandatory regardless of difficulty, and reviewers can close non-compliant PRs without discussion.
Build this weekend: Cloudflare open-sources its agent OS
Cloudflare OS (Apache-2.0) is live on GitHub: an agent workspace on Workers with sandboxed 'Gadgets,' capability-based Gatekeepers for GitHub, Google, Slack, Notion and Supabase, and Durable Objects. Run it locally with `pnpm run-local` at localhost:8787, or deploy to your own account.
Elsewhere: Hassabis hands off DeepMind
Demis Hassabis becomes Alphabet chair and Chief Scientist; longtime CTO Koray Kavukcuoglu takes day-to-day control of Gemini and frontier research under Pichai. A reshuffle this big can shift Gemini's release cadence — worth watching if you build on it.