Persona 3.0: Token-Based Theming

Building on Persona 2.0’s open-source widget, Persona 3.0 moves widget theming onto a three-layer token system with palette, semantic, and component tokens. The new createTheme() API, built-in presets, and validation helpers make embedded chat UIs easier to customize without juggling flat theme props.

For teams embedding Persona, this means more consistent design systems, safer migrations, and finer control over panels, messages, launchers, buttons, and artifact panes.