chore(main): release 1.0.0

[a2a-bot]

🤖 I have created a release beep boop

1.0.0 (2026-01-08)

⚠ BREAKING CHANGES

• spec: Remove deprecated fields from a2a.proto for v1.0 release (#1301)
• spec: Rename supportsAuthenticatedExtendedCard to supportsExtendedAgentCard (#1222)
• 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: Natively Support Multi-tenancy on gRPC through an additional scope field on the request. (#1195) (cfbce32), closes #1148
• spec: Remove v1s from a2a url http bindings. (#1269) (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
• 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)
• Revert "chore(gRPC): Update a2a.proto to include metadata on GetTaskRequest" (#1000) (e6b8c65)
• spec: Clarify contextId behavior when message is sent with taskId but without contextId (#1309) (a336a5a)
• 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: Suggest Unique Identifier fields to be UUID (#966) (00cf76e)
• Update the Java tutorials and descriptions (#1181) (202aa06)

Code Refactoring

• spec: Large refactor of specification to separate application protocol definition from mapping to transports (b078419)

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