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chore: add client-only entrypoint for browser usage#46

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swapydapy merged 4 commits intoa2aproject:mainfrom
kapetr:kapetr/client-only-entrypoint
Jul 11, 2025
Merged

chore: add client-only entrypoint for browser usage#46
swapydapy merged 4 commits intoa2aproject:mainfrom
kapetr:kapetr/client-only-entrypoint

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@kapetr kapetr commented Jul 9, 2025

Summary

This PR introduces a new client entrypoint to the A2A SDK to enable use in browser-based applications without bundling server-side code.

The existing main entrypoint (index.ts) is left untouched to avoid introducing any breaking changes. The new entrypoint includes only client-safe code (e.g. A2AClient) and avoids importing EventEmitter, fs, or other Node-specific APIs that would break browser builds.

This change allows users to safely do:

import { A2AClient } from '@a2a-js/sdk/client';

Future Suggestions (Not part of this PR)

  • Consider creating a dedicated server entrypoint (@a2a-js/sdk/server) for server-only components and possibly keep only safe exports (types, ...) in the main entrypoint to avoid confusion and provide clear working entrypoints.

BEGIN_COMMIT_OVERRIDE
feat!: separate entrypoints for client, server & common

Release-As: 0.2.3
END_COMMIT_OVERRIDE

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Summary of Changes

Hello @kapetr, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request adds a dedicated client entrypoint to the A2A SDK, making it easier to use in browser environments by preventing the inclusion of server-side code in browser bundles. The existing entrypoint remains unchanged to maintain backward compatibility.

Highlights

  • New Client Entrypoint: Introduced a new client entrypoint to the A2A SDK to enable usage in browser-based applications without bundling server-side code.
  • No Breaking Changes: The existing main entrypoint (index.ts) remains untouched to avoid introducing any breaking changes.
  • Client-Safe Code: The new entrypoint includes only client-safe code (e.g., A2AClient) and avoids importing Node-specific APIs that would break browser builds.
  • README Update: Updated the README.md to reflect the new client entrypoint and usage, including examples for basic and streaming usage.
  • package.json update: Updated the package.json to include the new client entrypoint in the exports.
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Code Review

This pull request introduces a new client-only entry point for browser usage. The changes involve updates to package.json and the addition of a dedicated client entry file. The documentation in README.md has also been updated to reflect these changes. The main feedback is a high-priority suggestion for package.json to include TypeScript type definitions in the exports map.

@swapydapy
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Thanks for the PR. We have recently added use of tsup to support commonJS modules as well. Could you please modify this PR according to tsup: https://tsup.egoist.dev/#multiple-entrypoints

@swapydapy
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Your suggestions makes sense. Could you please add them to the PR as well. Really appreciate your contribution!

kapetr added 4 commits July 10, 2025 08:31
Signed-off-by: Petr Kadlec <petr@puradesign.cz>
Signed-off-by: Petr Kadlec <petr@puradesign.cz>
Signed-off-by: Petr Kadlec <petr@puradesign.cz>
Signed-off-by: Petr Kadlec <petr@puradesign.cz>
@kapetr kapetr force-pushed the kapetr/client-only-entrypoint branch from 81b2b95 to 861575f Compare July 10, 2025 07:40
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kapetr commented Jul 10, 2025

@swapydapy Thanks, I've updated the PR accordingly and added the split into client and server entrypoint.

@swapydapy swapydapy merged commit e8dd025 into a2aproject:main Jul 11, 2025
1 check passed
ishymko added a commit that referenced this pull request Nov 27, 2025
…ser (#210)

# Description

Add an automated test for the issue solved previously in #46 to ensure
that client and root entry points build for browsers.

Example failure would look like:

```
✘ [ERROR] Could not resolve "events"

    dist/server/index.js:27:29:
      27 │ import { EventEmitter } from "events";
         ╵                              ~~~~~~~~

  The package "events" wasn't found on the file system but is built into node. Are you trying to
  bundle for node? You can use "--platform=node" to do that, which will remove this error.
```

(obtained by running `esbuild ./dist/server/index.js --bundle
--platform=browser --outdir=dist/tmp-checks --outbase=./dist`)

---------

Co-authored-by: Guglielmo Colombo <guglielmoc@google.com>
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3 participants