Git Worktrees + Headless AI Sessions: A Pattern...

The serial bottleneck You have a plan with six batches of AI-driven work: build the auth module, write its tests, scaffold the dashboard, add the API routes, wire up the middleware, write the integration tests. Batches 1–3 have nothing to do with batches 4–6. No shared files, no dependency chain, no ordering constraint. But they run one at a time. Twenty minutes of wall-clock time for work that could finish in ten. This is the embarrassingly parallel problem. A single Claude Code session is inhe