release: 1.20.0

[stainless-app]

Automated Release PR

1.20.0 (2026-01-30)

Full Changelog: v1.19.1...v1.20.0

Features

• client: add custom JSON encoder for extended type support (6d70ff1)

Chores

• ci: upgrade actions/github-script (78ec263)

---

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

[cursor]

PR Summary

Medium Risk
Changes how request JSON is serialized (and when content is set), which can affect API request formatting and edge-case payload types; coverage is added via new unit tests.

Overview
Adds a custom JSON encoder for request bodies. The client now serializes JSON payloads via openapi_dumps() (UTF-8 bytes) to support types like datetime and pydantic.BaseModel (dumped with exclude_unset=True and by_alias=True), and avoids setting content when sending multipart form data.

Compatibility + release housekeeping. _compat.model_dump() gains a by_alias option (including a Pydantic v1 fallback), CI upgrades actions/github-script v6 → v8, and version/changelog/manifest are bumped to 1.20.0 with new tests covering the JSON serialization behavior.

^{Written by Cursor Bugbot for commit 4167236. This will update automatically on new commits. Configure here.}

[stainless-app]

🧪 Testing

To try out this version of the SDK, run:

pip install 'https://pkg.stainless.com/s/luma_ai-python/6d70ff1931539ffe3e63becaef004cdbb3697e2a/lumaai-1.19.1-py3-none-any.whl'

Expires at: Sun, 01 Mar 2026 05:06:43 GMT
Updated at: Fri, 30 Jan 2026 05:06:43 GMT