E2B 2.62.0 adds streaming file writes and optional output retention

E2B’s JavaScript and Python SDK releases share two substantive changes. They are covered together, with the code-interpreter Python dependency update, rather than as separate launches.

Stream files and command output

File writes accept iterable byte chunks. JavaScript supports async iterables and readable streams; Python supports the iterable form appropriate to its synchronous or asynchronous client.

Command run and connect operations gain retainOutput or retain_output. It defaults to true. Setting it to false stops buffering standard output and error while output callbacks continue receiving data. This is useful for applications that already consume or store the stream elsewhere; the notes do not provide a memory benchmark.

Check compatibility before upgrading

Streaming uploads require an octet-stream content type and envd 0.5.7 or newer. Unsupported JavaScript browser streaming requests now raise an argument error rather than silently buffering; a Blob is the alternative described in the notes. Invalid gzip-plus-multipart combinations also raise errors. Installing an SDK does not include free hosted sandbox capacity.

See the e2b hub.