v2.0.1

2.0.1 (2026-10-22)

Bug Fixes

• http: Isolate session stream conflicts from shared transport (#303) (ad220c7)

v2.0.0

2.0.0 (2026-10-19)

⚠ BREAKING CHANGES

• AgentSideConnection, ClientSideConnection, Agent, Client, LegacyAgentFactory, createLegacyAgent, and their extension aliases and connector helper have been removed. Use agent()/client() apps and peer-context request()/notify() calls. Compiled tests, fixtures, and examples are no longer published. See MIGRATION_STABLE_UNSTABLE.md for migration instructions.
• Default v1 and experimental v2 imports now expose only stable-feature schemas. Unstable v1 features require @agentclientprotocol/sdk/unstable; unstable v2 features require @agentclientprotocol/sdk/experimental/v2/unstable. Both v2 entrypoints remain experimental. SDK 2.0 does not switch the default protocol from ACP v1. The unversioned JSON schema export is removed; use the versioned schema/v1 or schema/v2 exports. All legacy v1 integrations must migrate to agent()/client() apps regardless of feature profile; opting into /unstable does not restore the removed connection classes or connector helper. See https://github.com/agentclientprotocol/typescript-sdk/blob/main/MIGRATION_STABLE_UNSTABLE.md for migration instructions.

Features

• make stable protocol bindings the default (6caf469)
• retire legacy connection APIs and publish production-only builds (#294) (52edc15)

Bug Fixes

• enforce supported Zod floor and patch generator YAML parser (#296) (f0cab19)
• import zod as a namespace so bundlers can tree-shake it (#291) (60619a4)

v1.9.0

1.9.0 (2026-10-16)

Features

• isolate NES behind an experimental entrypoint (#284) (e3678c2)
• update schemas to v1.26.0 and v2.0.0-alpha.9 (#285) (93599f3)

Bug Fixes

• accept omitted and null params for optional requests (#282) (a2fbbb9)
• examples: report v2 turn failures on idle (#279) (28b1291)
• preserve outgoing v2 initialize payloads (#283) (b98857b)
• v2: align protocol version negotiation (#286) (4197b89)
• v2: decouple session updates from prompt completion (#280) (0154528)

v1.8.0

1.8.0 (2026-10-09)

Features

• schema: update to v1.25.0 and v2.0.0-alpha.8 (#273) (c979649)

v1.7.0

1.7.0 (2026-10-02)

Features

• v2: check the extensible-union values you build (#268) (8a60383)

v1.6.1

1.6.1 (2026-10-02)

Bug Fixes

• type the routed connection's closed promise as always present (#265) (9d9fa3d)

v1.6.0

1.6.0 (2026-10-01)

Features

• update schemas to v1.24.1 and v2.0.0-alpha.7 (#263) (a1a80ff)

v1.5.1

1.5.1 (2026-09-28)

Bug Fixes

• bound incoming transport message sizes (#259) (69fda37)
• bound per-connection memory in AcpServer (#261) (4356253)

v1.5.0

1.5.0 (2026-09-21)

Features

• update schemas to v1.22.0 and v2.0.0-alpha.4 (#253) (a9f08bd)
• update schemas to v1.23.0 and v2.0.0-alpha.5 (#255) (f7941e7)

v1.4.0

1.4.0 (2026-08-20)

Features

• Stabilize elicitation APIs (#242) (dc3b0e4)

Bug Fixes

• jsonrpc: report malformed input (#230) (0819dbe)
• server: preserve routed outbound messages (#231) (5f58a95)
• v2: enforce initialization lifecycle (#235) (b7d6e81)
• v2: enforce method contracts (#229) (0101014)