release: 0.49.1

[stainless-app]

Automated Release PR

0.49.1 (2026-04-11)

Full Changelog: v0.49.0...v0.49.1

Bug Fixes

• ensure file data are only sent as 1 parameter (e566aa5)

---

This pull request is managed by Stainless's GitHub App.

The semver version number is based on included commit messages. Alternatively, you can manually set the version number in the title of this pull request.

For a better experience, it is recommended to use either rebase-merge or squash-merge when merging this pull request.

🔗 Stainless website
📚 Read the docs
🙋 Reach out for help or questions

---

Note

Medium Risk
Touches extract_files multipart serialization logic, which can affect how file uploads are encoded and whether request bodies match the API’s expectations.

Overview
Bumps the SDK release to 0.49.1 and updates release metadata (CHANGELOG.md, version files, OpenAPI spec pointer).

Fixes file extraction/multipart preparation so that when a configured file path ends with only "<array>" markers (e.g., a top-level files: [..]), the field is popped once and emitted as repeated files[] entries rather than being left behind or treated as multiple parameters. Adds a regression test covering top-level file arrays.

^{Reviewed by Cursor Bugbot for commit a98485f. Bugbot is set up for automated code reviews on this repo. Configure here.}

[firetiger-agent]

Firetiger deploy monitoring skipped

This PR didn't match the auto-monitor filter configured on your GitHub connection:

Any PR that changes the kernel API. Monitor changes to API endpoints (packages/api/cmd/api/) and Temporal workflows (packages/api/lib/temporal) in the kernel repo

Reason: This is an automated release PR for the Python SDK, not a change to kernel API endpoints or Temporal workflows in the kernel repo.

To monitor this PR anyway, reply with @firetiger monitor this.

[stainless-app]

🧪 Testing

To try out this version of the SDK:

pip install 'https://pkg.stainless.com/s/kernel-python/e566aa50a9022d5b284c6334b3704df2a96643cc/kernel-0.49.0-py3-none-any.whl'

Expires at: Mon, 11 May 2026 05:26:25 GMT
Updated at: Sat, 11 Apr 2026 05:26:25 GMT