open protocol · S-077
AG-UI
Stream agent state, events, and interaction between backends and user interfaces.
Markdown · JSON · Canonical source
- Revision
- living
- Maturity
- open protocol
- Authority
- AG-UI community
- Structure
- Event-based bidirectional agent and user interaction
- Roles
- agent-backend, application
AG-UI focuses on interaction between an agent backend and an application. MCP can supply tools and context, while A2A can exchange work between agents; those layers can coexist with AG-UI.
Compatibility records should identify protocol revision, event families, transport, state synchronization behavior, and application/backend role.
Catalog mapping
Atomic capability rows
Absence here means the feature tree has not yet been published, not that the specification lacks the capability.
Conformance boundary
Proposed tests
Definitions only. No fixture has been executed against a harness.