The data model and Meadowcap are final; the drop format and Willow'25 are proposals on their pages (the changelog calls drops a candidate); Confidential Sync, home of the private overlap detection, is paused; the Willow Transfer Protocol, dated October 2026, is the live proposal and sends requests and tickets in the clear.

Builders need to know which parts they can rely on today.

Which parts can you build on today? The site stamps every spec with a status.

The data model and Meadowcap are final. Meadowcap became final in twenty twenty five.

The drop format and Willow twenty five are still proposals.

Confidential sync, the private protocol of the earlier units, is paused. A simpler Willow transfer protocol is the live proposal, dated October twenty twenty six. It sends requests and tickets in the clear.

So the model and the tickets are settled. How peers talk, and how privately, is still being decided.

Check yourself. Which two specifications are final?