BlitzReels Caption Themes

Create a reusable theme only when the user wants a look that should outlive one project. Use a built-in caption look when it already satisfies the request.

Workflow

1. List built-in caption looks and custom themes.
2. If the user references an existing look, read its current settings before changing anything.
3. Load the caption-theme and preview schemas from OpenAPI. Do not carry forward settings from an old recipe unless the current schema accepts them.
4. Translate the request into a small set of design decisions: typography, contrast, active-word treatment, reveal behavior, line limits, and placement.
5. Render a preview from raw settings before creating or updating the reusable theme.
6. Check readability, safe-area placement, and contrast in the returned image.
7. Create, patch, duplicate, or set the default only as requested.
8. Read the theme again and, when relevant, apply it to a test project for a rendered-frame check.

Design rules