Adds `sendStdin`/`send_stdin` and `closeStdin`/`close_stdin` directly on
the command handle (JS, Python sync, and Python async) so background
commands can be fed stdin and signalled EOF without reaching back to
`sandbox.commands` with the PID. The handle delegates to the existing
`Commands` methods via closures, mirroring how `kill` is wired, and also
adds the previously-missing `close_stdin`/`aclose_stdin` to the Python
`Commands` class (version-gated on `ENVD_ENVD_CLOSE`, matching JS).
PTY-created handles don't support these and raise a clear error, and the
existing PID-based `Commands.sendStdin` methods are untouched, so the
change is fully backward-compatible. Includes handle-based tests across
all three SDKs and a changeset bumping `e2b` and `@e2b/python-sdk` at
patch.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Mish Ushakov