T3 Code Decoded
A source-grounded, end-to-end field guide to T3 Code's control plane, provider adapters, clients, remote access, and distribution system.

Follow the control plane all the way down.
From a tap on a phone to a provider subprocess, persisted event, hidden Git checkpoint, and streamed UI update—every layer is explained against one pinned source revision.
What this book is trying to make obvious
T3 Code is easy to mistake for an agent. It is more useful—and more technically interesting—to see it as a control surface and execution boundary around several independent agent runtimes. Providers own their model loops and native context. T3 owns durable orchestration history and query projections, coordinates workspace operations, and gives clients shared semantics with deliberate platform-specific capabilities. Some delivery and side-effect machinery remains intentionally ephemeral; the book marks those seams instead of calling all server state durable.
That division of ownership is the spine of the book. Every later module connects back to it.