Persona 2.0 — Open Source Chat SDK

Persona is now open source: a themeable, pluggable, zero-framework chat widget with Shadow DOM isolation, SSE streaming, agent loops, and voice input.

For the newer structured theming system (createTheme(), design tokens, and presets), see persona-chat.dev.

To aid migrations, this version will auto-migrate old config values to the new format. We'll be 3.0 soon that supports only the new format.