The UAI-1 message model makes cross-boundary state, delivery, trust, provenance, and integrity reviewable instead of implicit.
| Section | What it tells the receiver |
|---|---|
| Profile | Which published profile or validation rule family applies. |
| Conversation state | How this exchange relates to a larger workflow or turn sequence. |
| Delivery | Sync or async behavior, priority, expiry, and acknowledgment expectations. |
| Trust | Principal, credential, authentication, or signature references. |
| Provenance | Trace and source context that make the exchange reviewable later. |
| Integrity | Checksums or reproducible anchors showing the payload has not changed. |