Not sure about Google, but Anthropic has achieved RSI. – Engineers ship 8x more code per quarter than they did in 2021-2025 – Claude writes 80% of it – Tests across the codebase grew 10x – Headcount barely moved – CI jobs went up 25x in six months Their test selection service could not take it. So they patched it. – Patch 1, bigger machine: bought 70 days – Patch 2, sharding: bought 29 days – Patch 3, daily restarts: bought less than a day That's the exponential, in three data…

addyosmani@addyosmani8h ago

At Anthropic, Claude now writes 80% of our code. Engineers ship 8x more code per quarter. Side effect: Tests grew 10x. CI jobs up 25x in 6 months. Here's what helped us scale: https://t.co/WOL2r60vAE https://t.co/7vf60noTQt