Microsoft details building Copilot Cowork: 9 engineers, 1,211 PRs in a day
luisdans · x · 2026-11-04
Microsoft's Command Line blog published a deep dive on building Copilot Cowork, an agentic execution layer that runs multi-step workflows on behalf of everyday knowledge workers.
- A team of just 9 engineers merged 1,211 pull requests in a single day at peak
- The product integrates Work IQ, Microsoft 365 security and governance, cloud execution, and Microsoft's multi-model architecture
- Includes a case study of migrating the runtime from Python to Rust while live
A worthwhile read for anyone interested in agent development at scale and team engineering practice.
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