2026-27 cycle is live
The home for COD annual updates.
A single place to find every artifact produced across each COD cycle. Quiet, editorial, and built to last.
Cycles
Browse the directory of annual update cycles. Each cycle has its own set of canonical artifacts.
2026-27Active
Schema diffs, sample comparisons, Vol 6 changelog and explorer, and message class rules.
Open cycle
2025-26
Prior cycles will be archived here as they wrap.