GitHub rebuilds its Git storage to absorb 5,000 agents on a single repository

On November 5, 2026, GitHub detailed “Project Rubicon”, its new Git storage architecture capable of 7,200 pushes per second to one repository and 5,000 concurrent agents, built on a simple insight: only reference updates need coordination. Immutable Git objects go to Azure Blob Storage; the tiny mutable state goes to a replicated log.