cmarteepants opened a new pull request, #64552:
URL: https://github.com/apache/airflow/pull/64552
Follow-up to #64232.
Makes the `tokens` field optional on the `Theme` model, so users can supply
any combination of top-level theme fields, or an empty `{}` to restore OSS
defaults. Previously, `tokens` was required, meaning a `globalCss`-only or
icon-only config would fail validation.
**Use case:** A user may want to apply custom CSS or a custom icon without
specifying any colour tokens, or set `AIRFLOW__API__THEME='{}'` to explicitly
fall back to the default theme without removing the config key entirely.
**Screenshot** (icon-only theme, `tokens` omitted entirely):
<img width="1780" height="1122" alt="Screenshot 2026-03-31 at 3 57 48 PM"
src="https://github.com/user-attachments/assets/35171230-8284-419a-aaa1-f4e6e22f6d1b";
/>
closes: #64232 (follow-up)
---
##### Was generative AI tooling used to co-author this PR?
- [X] Yes — Claude Code (claude-opus-4-6)
Generated-by: Claude Code (claude-opus-4-6) following [the
guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#gen-ai-assisted-contributions)
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