enable http2 for js sdk envd rpc/api traffic

[matthewlouisbrockman]

Enables HTTP/2 for JS SDK sandbox envd traffic in Node by routing envd RPC/API requests through undici with an HTTP/2-enabled dispatcher.

Non-Node runtimes continue to use global fetch. Management API and volume clients are unchanged.

Requires bumping node from >=20 to >= 20.18.1 for undici

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🦋 Changeset detected

Latest commit: 3f793cd

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
e2b	Patch

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PR Summary

Medium Risk
Moderate risk because it changes the transport layer for all sandbox envd RPC/API calls in Node and adds a new HTTP client dependency; regressions would show up as request/streaming failures or connection leaks under load.

Overview
This PR switches JS SDK sandbox envd RPC and REST calls (in Node only) to use undici with an HTTP/2-enabled dispatcher, while non-Node runtimes keep using global fetch.

It also raises the minimum supported Node version to >=20.18.1, adds tests for the new fetch wrapper behavior, and introduces a potential lifecycle concern since the created Agent dispatchers are cached and never explicitly closed.

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Package Artifacts

Built from 4b07ba5. Download artifacts from this workflow run.

JS SDK (e2b@2.19.5-js-http2.0):

npm install ./e2b-2.19.5-js-http2.0.tgz

CLI (@e2b/cli@2.10.2-js-http2.0):

npm install ./e2b-cli-2.10.2-js-http2.0.tgz

Python SDK (e2b==2.20.3+js-http2):

pip install ./e2b-2.20.3+js.http2-py3-none-any.whl

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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