chore(main): release 1.0.0

[a2a-bot]

🤖 I have created a release beep boop

1.0.0 (2026-02-06)

⚠ BREAKING CHANGES

• spec: Switch to non-complex IDs in requests (#1389)
• spec: Standardize spelling of "canceled" to use American Spelling throughout (#1283)
• spec: Align enum format with ADR-001 ProtoJSON specification (#1384)
• spec: Remove redundant final field from TaskStatusUpdateEvent (#1308)
• spec: Move extendedAgentCard field to AgentCapabilities (#1307)
• spec: Fixes for the last_updated_after field (#1358)
• spec: modernize oauth 2.0 flows - remove implicit/password, add device code / pkce (#1303)
• spec: Make "message" field name consistent between protocol bindings (#1302)
• spec: Remove deprecated fields from a2a.proto for v1.0 release (#1301)
• spec: Rename supportsAuthenticatedExtendedCard to supportsExtendedAgentCard (#1222)
• spec: Remove v1s from a2a url http bindings
• spec: Large refactor of specification to separate application protocol definition from mapping to transports

Features

• spec: Add tasks/list method with filtering and pagination to the specification (0a9f629)
• spec: modernize oauth 2.0 flows - remove implicit/password, add device code / pkce (#1303) (525ff38)
• spec: Natively Support Multi-tenancy on gRPC through an additional scope field on the request. (#1195) (cfbce32), closes #1148
• spec: Provide ability for SDKs to be backwards compatible. (#1401) (227e249)
• spec: Remove v1s from a2a url http bindings (1bd263f)

Bug Fixes

• Add missing metadata field to Part message in gRPC specification (#1019) (b3b266d), closes #1005
• Add name field to FilePart protobuf message (#983) (2b7cb6f), closes #984
• Clarify blocking calls return on interrupted states (#1403) (0655ff3)
• doc: Makes JSON-RPC SendMessage response clearer (#1241) (5792804)
• grpc: Fix inconsistent property name between gRPC and JSON-RPC in Message object (#1100) (2a1f819)
• grpc: missing field in gRPC spec - state_transition_history (#1138) (a2de798), closes #1139
• grpc: Update CreateTaskPushNotificationConfig endpoint to /v1/{parent=tasks/*/pushNotificationConfigs} (#979) (911f9b0)
• proto: Add icon_url to a2a.proto (#986) (17e7f62)
• proto: Adds metadata field to A2A DataPart proto (#1004) (a8b45dc)
• Remove unimplemented state_transition_history capability field (#1396) (c768a44), closes #1228
• Restore CreateTaskPushNotificationConfig method naming (#1402) (d14f410)
• Revert "chore(gRPC): Update a2a.proto to include metadata on GetTaskRequest" (#1000) (e6b8c65)
• Simplify Part message structure by flattening FilePart and DataPart (#1411) (bfae8f7)
• spec: Added clarification on timestamps in HTTP query params (#1425) (6292104)
• spec: Added clarifying text around messages and artifacts (#1424) (b03d141)
• spec: Clarify contextId behavior when message is sent with taskId but without contextId (#1309) (a336a5a)
• spec: Clarify versioning strategy and client responsibilities in protocol specification (#1259) (a4afeea)
• spec: Fix/1251 clarify authentication scheme (#1256) (3e6c7db)
• spec: Fixes for the last_updated_after field (#1358) (0e204bf)
• spec: Make "message" field name consistent between protocol bindings (#1302) (1e5f462), closes #1230
• spec: make history_length optional (#1071) (0572953)
• spec: Remove deprecated fields from a2a.proto for v1.0 release (#1301) (60f83c3), closes #1227
• spec: Remove metadata field from ListTasksRequest (#1235) (b6ef9ee)
• spec: Rename supportsAuthenticatedExtendedCard to supportsExtendedAgentCard (#1222) (c196824), closes #1215
• spec: Standardize spelling of "canceled" to use American Spelling throughout (#1283) (4dd980f)
• spec: Suggest Unique Identifier fields to be UUID (#966) (00cf76e)
• spec: Switch to non-complex IDs in requests (#1389) (2596c1c), closes #1390
• spec: Update security schemes example (#1364) (f9a8f5b)
• Update the Java tutorials and descriptions (#1181) (202aa06)

Documentation

• spec: Align enum format with ADR-001 ProtoJSON specification (#1384) (810eaa1), closes #1344

Code Refactoring

• spec: Large refactor of specification to separate application protocol definition from mapping to transports (b078419)
• spec: Move extendedAgentCard field to AgentCapabilities (#1307) (40d6286)
• spec: Remove redundant final field from TaskStatusUpdateEvent (#1308) (5b101cc)

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