feat: introduce transport agnostic client #198
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This reverts commit 72916c3.
guglielmo-san
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Nov 26, 2025
yarolegovich
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Nov 27, 2025
ishymko
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# Description Propagate `RequestOptions` down to `Transport`. Re #198, was missing in the original PR - wasn't release yet, so no impact.
This was referenced Dec 10, 2025
ishymko
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# Description 1. Update README.md, sample agents and sample CLI to use new APIs introduced in #162 (extract middlewares from `A2AExpressApp`) and #198 (transport-agnostic client). 2. Mark `A2AExpressApp` and `A2AClient` as deprecated. 3. Ensure samples and TCK import via index files only to "test" that all required types are exported. 4. Consolidate all `@example` tags to use ` ```ts `.
ishymko
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🤖 I have created a release *beep* *boop* --- ## [0.3.6](v0.3.5...v0.3.6) (2025-12-10) ### Features * add support for extendedAgentCard on client side ([#234](#234)) ([3073376](3073376)) * Add support for extension headers on client side ([#227](#227)) ([8c57002](8c57002)) * implement client interceptors ([#223](#223)) ([5694c22](5694c22)) * Implement extended card support on server side ([#197](#197)) ([45014ac](45014ac)) * implement server http+json ([#142](#142)) ([f20e662](f20e662)) * introduce AgentCardResolver ([#225](#225)) ([ddaf7de](ddaf7de)) * introduce transport agnostic client ([#198](#198)) ([94a9848](94a9848)) * server side support for extensions ([5ef7396](5ef7396)) * support authentication on server side ([#195](#195)) ([9872d93](9872d93)) ### Bug Fixes * handle errors occurred in non-blocking sendMessage ([#187](#187)) ([e55c0f4](e55c0f4)) ### Miscellaneous Chores * set version to 0.3.6 ([#191](#191)) ([3f8cea0](3f8cea0)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: Ivan Shymko <ishymko@google.com>
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Description
As a next step after #169, define a transport agnostic client.
Changes
Main
Clientbuilt around core types, not JSON-RPC wrappers.ClientFactoryto dynamically select transport among available based on agent card and factory level preferences.Misc
A2ATransporttoTransport(this type is not yet exported viaindex.ts).AbortSignaltoTransportand new client for cancellation.sendMessageandsendMessageStreamusing server SDK wired up with real expressjs app and invoked via newly created client.getTaskPushNotificationConfigtypes in transport.TODOs
Re #137, #142
Release-As: 0.3.6