Compare slides

Compare two or more alternatives with selectable content.

Source

---
@type: compare

## Build choices

### Local
Fast iteration with the current checkout.

### CI
Repeatable checks in the configured workflow.

Rendering and interaction

Third-level headings identify alternatives. The parser can infer comparison from repeated headings, but use an explicit type to distinguish it from tabs or timeline. Test option buttons and Up/Down cycling; Left/Right continues ordinary navigation. Use matching criteria across alternatives.

Add speaker notes and run source validation before building. Test the slide in the generated deck; the HTML structure and CSS classes are implementation details, not a substitute for checking behavior.

See directives, speaker notes, and keyboard controls.