Agent-to-Agent

1.0.1 (2026-05-26) Bug Fixes spec: prefer application/a2a+json in HTTP binding ( #1753 ) ( 7ff1004 ) spec: recent transcoding-related error changes ( #1627 ) ( 757f0ec ) TaskStatus values in the specification ( #1801 ) ( e997516 )

1.0.0 (2026-03-12) ⚠ BREAKING CHANGES spec: Combine TaskPushNotificationConfig and PushNotificationConfig ( #1500 ) spec: remove duplicated ID from the create task push config request ( #1487 ) spec: pluralize configs in ListTaskPushNotificationConfigs ( #1486 ) spec: Add LF prefix to the package. ( #1474 ) 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: M...

fix(spec): Added clarification on timestamps in HTTP query params ( #1 …

0.3.0 (2025-07-30) ⚠ BREAKING CHANGES Add mTLS to SecuritySchemes, add oauth2 metadata url field, allow Skills to specify Security ( #901 ) Change Well-Known URI for Agent Card hosting from agent.json to agent-card.json ( #841 ) Add method for fetching extended card ( #929 ) Features Add signatures to the AgentCard ( #917 ) ( ef4a305 ) Add method for fetching extended card ( #929 ) ( 2cd7d98 ) Add mTLS to SecuritySchemes, add oauth2 metadata url field, allow Skills to specify Security ( #901 ) ( e162c0c ) Bug Fixes spec: Add SendMessageRequest.request json_name mapping to message ( #904 ) ( 2e...

0.2.6 (2025-07-17) Bug Fixes Type fix and doc clarification ( #877 ) ( 6f1d17b ) Update json names of gRPC objects for proper transcoding ( #847 ) ( 6ba72f0 )

0.2.5 (2025-06-30) ⚠ BREAKING CHANGES spec: Add a required protocol version to the agent card. ( #802 ) Support for multiple pushNotification config per task ( #738 ) ( f355d3e ) Features spec: Add a required protocol version to the agent card. ( #802 ) ( 90fa642 ) spec: Support for multiple pushNotification config per task ( #738 ) ( f355d3e ) Documentation update spec & doc topic with non-restartable tasks ( #770 ) ( ebc4157 )

Full Changelog : v0.2.3...v0.2.4 feat: Add support for multiple transport announcement in AgentCard

0.2.3 (2025-06-12) Bug Fixes Address some typos in gRPC annotations ( #747 ) ( f506881 )

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0.2.2 (2025-06-09) ⚠ BREAKING CHANGES Resolve spec inconsistencies with JSON-RPC 2.0 Features Add gRPC and REST definitions to A2A protocol specifications ( #695 ) ( 89bb5b8 ) Add protocol support for extensions ( #716 ) ( 70f1e2b ) spec: Add an optional iconUrl field to the AgentCard ( #687 ) ( 9f3bb51 ) Bug Fixes Protocol should released as 0.2.2 ( 22e7541 ) Resolve spec inconsistencies with JSON-RPC 2.0 ( 628380e )

0.2.1 (2025-05-27) Features Add a new boolean for supporting authenticated extended cards ( #618 ) ( e0a3070 ) Add optional referenceTaskIds for task followups ( #608 ) ( 5368e77 )