ag-ui-protocol/ag-ui release/2026-09-17

Release 2026-09-17

on GitHub

Packages Published

TypeScript (npm) - published at 03:13:24 UTC

@ag-ui/claude-agent-sdk@0.0.4

• Publish the declared MIT license and license file in the npm package.

@ag-ui/spring-ai@0.0.3

• Publish the declared Apache-2.0 license and license file in the npm package.

@ag-ui/watsonx@0.0.2

• Publish the declared MIT license and license file in the npm package.

@ag-ui/a2a-middleware@0.0.3

• Publish the declared MIT license and license file in the npm package.

create-ag-ui-app@0.0.59

• Publish the declared MIT license and license file in the npm package.

TypeScript (npm) - published at 18:31:33 UTC

@ag-ui/client@1.0.0

• Adds the 1.0 enforcement pipeline that runs after middleware: strip against the schema and validate.
• Adds protobuf wire support and compatibility middleware.
• Snapshot metadata now lets a producer declare only its authoritative activity types, so projectors like A2UI middleware don't delete activity other producers own.
• MESSAGES_SNAPSHOT now applies in snapshot order instead of appending unseen messages at the end, repairing re-keyed message ordering.
• Fixes scoped activity deletion without reordering history and preserves full activity snapshot authority.
• Bounds the replay buffer and caps SSE and protobuf framing buffers to avoid retaining entire responses.
• Stops upstream reads and cancels the HTTP reader on stream failure, not only on completion.
• Reasoning events no longer overwrite an activity message sharing the same id.
• Each run now gets its own set of blocked tool-call IDs, so a stalled run's filtered events are no longer leaked.
• FilterToolCallsMiddleware clears blocked tool-call IDs on run boundaries.
• Guards JSON.parse and surfaces stream errors in legacy convert and a2a middleware.

Breaking changes

• The wire protocol version is now the generated PROTOCOL_VERSION ("1.0").
• Enforcement pipeline now runs after middleware and strips/validates against the schema, changing which events pass through.
• MESSAGES_SNAPSHOT ordering and activity-ownership semantics changed; re-verify snapshot handling.
• Framing buffers are now capped; oversized unbounded streams will error instead of growing.

@ag-ui/core@1.0.0

• Rebuilt on generated types; the main entry is now zod-free with validators moved to @ag-ui/core/schemas, making zod an optional peer.
• 0.x names remain as deprecated aliases of the same types (see DEPRECATIONS.md); content parts are named by what they are rather than by direction.
• PROTOCOL_VERSION now reads "1.0"
• Ships the AG-UI 1.0 specification, JSON Schema, and the generators SDKs are produced from.

Breaking changes

• PROTOCOL_VERSION changed to "1.0".
• Validators moved to @ag-ui/core/schemas; zod is now an optional peer, so imports relying on zod from the main entry must update.
• Several 0.x type names are now deprecated aliases; re-verify against DEPRECATIONS.md.

@ag-ui/encoder@1.0.0

• Updated for the 1.0 release, including generated models, the enforcement pipeline, protobuf wire, and compatibility middleware.

Breaking changes

None.

@ag-ui/proto@1.0.0

• Updated for the 1.0 release with generated models and protobuf wire support.
• Protocol version emitted is now "1.0", naming the 1.0 schema address.

Breaking changes

• Protocol version changed to "1.0"; the schema $id address moved to /spec/1.0/schema.json.

Python (PyPI) - published at 18:31:34 UTC

ag-ui-protocol@1.0.0

• Froze the draft schema as 1.0; PROTOCOL_VERSION now reads "1.0", and the schema $id moved to /spec/1.0/schema.json.
• ag_ui.core re-exports generated 1.0 models, with 0.x names kept as aliases.
• Added generated models for content parts, tool result parts, capabilities, run outcomes, token usage with cache writes, and file source.
• Optional null fields are now omitted on serialization; payload nulls are preserved.
• The single wire protocol version is now the generated PROTOCOL_VERSION.
• Added stable Changelog project URLs to published package metadata on PyPI.

Breaking changes

• The wire protocol version changed to "1.0"; consumers comparing versions must re-verify.
• Model names changed to 1.0 names (0.x names remain as aliases); verify imports.
• The redundant MetadataMixin export was removed.
• Serialization now omits optional nulls, changing emitted payloads.

.NET (NuGet) - published at 18:54:29 UTC

AGUI.Abstractions@1.0.0

• Models are now generated from the frozen AG-UI 1.0 JSON Schema, covering content parts, tool result parts, capabilities, run outcomes, token usage with cache writes, and file source.
• PROTOCOL_VERSION now reads "1.0"; generated headers name the 1.0 schema address.
• Generator emits the AGUIProtocol type.

Breaking changes

• Models renamed to their 1.0 names; verify usages against the generated types.
• Optional nulls are omitted on serialization while payload nulls are preserved.
• Protocol version constant value changed to "1.0".

AGUI.Formatting@1.0.0

• Updated to the generated 1.0 models, aligning content parts, tool result parts, capabilities, run outcomes, and token usage.

Breaking changes

• Model names and serialization follow the 1.0 schema; re-verify formatting against renamed types and null-omission behavior.

AGUI.Protobuf@1.0.0

• Regenerated against the frozen AG-UI 1.0 schema; protocol version and generated headers now reference the 1.0 address.

Breaking changes

• Models track the 1.0 schema names; re-verify types and serialization after upgrade.

AGUI.Client@1.0.0

• Client now declares the protocol version it speaks: every RunAgentInput carries "1.0", read from the generated AGUIProtocol.Version.
• Client validates the producer's protocol version, mirroring the TypeScript client handshake.
• Moved onto the generated 1.0 models.

Breaking changes

• The protocol version is the generated AGUI.Abstractions.AGUIProtocol.Version; there is no hand-written constant beside it.
• Wire protocol version now sent as "1.0"; model names and null handling follow the 1.0 schema.

AGUI.Server@1.0.0

• Moved onto the generated 1.0 models.
• Added typed access to AG-UI client state.

Breaking changes

• Models track the 1.0 schema names; re-verify types and serialization behavior after upgrade.