1.0.0-alpha.0 (2026-05-11)

See the v0.3 -> v1.0-alpha.0 migration guide.

Note: Enabling backward compatibility with v0.3 is tracked in #452.

⚠ BREAKING CHANGES

• Drop support for node 18 (#368)
• Make ServerCallContext parameter mandatory across all places (#405)
• Remove JSON-RPC client (#353)
• Remove transport-specific exports (#404)
• Update codebase to use A2A 1.0.0 data model (#375)
• Remove A2AExpressApp (#363)

Features

• Add A2A Version Header (#422) (b5f3db7)
• Add cache-headers logic to the agent card handler (#435) (955b52b)
• Add resource scoping (#450) (c527086)
• Add support for custom authentication scheme and credentials in auth-headers (#430) (5a4389b)
• AgentCardSignature support (#448) (4a41a8c)
• Enforce events ordering (#437) (157cf48)
• Enriched Error Model (#427) (c130778)
• Implement listTasks method (#383) (7d4c472)
• Send current task as the first event after subscribing to it (#418) (4bfcf5f)
• Support multi-tenancy (#419) (1877877)

Code Refactoring

• remove A2AExpressApp (#363) (0b84728)

0.3.13 (2026-03-16)

Bug Fixes

• properly parse ProtoJSON body for POST pushNotificationConfigs (#352) (57696a8), closes #336

0.3.12 (2026-03-10)

Bug Fixes

• Fixing missing push configuration after normalization for rest transport (#346) (54ac8c4)

0.3.11 (2026-03-10)

Bug Fixes

• support proto-based AgentCard in AgentCardResolver (#344) (e71221c)
• throw on JSON-RPC response id mismatch (#318) (5ea1c94)

0.3.10 (2026-01-27)

Bug Fixes

• do not use ReadableStream async iterator in SSE stream parsing (#311) (5359fa8)
• preserve typed error as cause in SSE errors (#315) (d39544e)

0.3.9 (2026-01-21)

Features

• implement gRPC client (#299) (dbdb96e)
• implement gRPC server (#279) (bd4caa2)

Bug Fixes

• use proto default values in generated a2a_types.ts (#303) (0215d42)

0.3.8 (2026-01-15)

⚠ BREAKING CHANGES

• use ProtoJSON for REST transport (#292)

Features

• use case-insensitive transport protocol name comparison in ClientFactory (5246067)

Bug Fixes

• add typesVersions to support legacy module resolution (#288) (6499e29)
• use ProtoJSON for REST transport (#292) (d2efc4c)

0.3.7 (2025-12-17)

Features

• add rest client (#258) (96be3a1)
• remove EventEmitter dependency to support Edge Runtime (#219) (6c76fef), closes #218

Bug Fixes

• export transport agnostic errors from client (#272) (23cd42e)
• pass ServerCallContext to getAuthenticatedExtendedAgentCard for REST (#274) (89b141b), closes #137

0.3.6 (2025-12-10)

Features

• add support for extendedAgentCard on client side (#234) (3073376)
• Add support for extension headers on client side (#227) (8c57002)
• implement client interceptors (#223) (5694c22)
• Implement extended card support on server side (#197) (45014ac)
• implement server http+json (#142) (f20e662)
• introduce AgentCardResolver (#225) (ddaf7de)
• introduce transport agnostic client (#198) (94a9848)
• server side support for extensions (5ef7396)
• support authentication on server side (#195) (9872d93)

Bug Fixes

• handle errors occurred in non-blocking sendMessage (#187) (e55c0f4)

Miscellaneous Chores

• set version to 0.3.6 (#191) (3f8cea0)

0.3.5 (2025-11-05)

Bug Fixes

• cancel/task now returns the expected 'cancelled' task status (#158) (3eec0bd)
• correct the default value in the agentCardPath comment (#130) (3279c7b)
• enable follow up task issue on non blocking request (#160) (352dc05)
• ensure push notifications order (#141) (22360e6)
• ensure user messages are added to existing tasks (#138) (00fb916)
• validate JSON-RPC params (#155) (5b39f4d)
• validate JSON-RPC request id according to the spec (#152) (9558c36)