> ## Documentation Index
> Fetch the complete documentation index at: https://docs.useharmonia.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# UI platform

> How Harmonia presents deterministic workflow truth and bounded agent-generated surfaces.

## How Harmonia uses it

Next.js serves the dashboard, chat, settings, and authenticated API routes. React renders persisted job state, while Google A2UI lets Maya propose bounded presentation structures that server code hydrates from trusted data.

<CardGroup cols={2}>
  <Card title="Next.js and React" href="/platform/ui/nextjs">Application and API surface.</Card>
  <Card title="Google A2UI" href="/platform/ui/a2ui">Bounded generative UI protocol.</Card>
</CardGroup>

## Evidence status

Application tests and production builds verify local behavior. A local render does not prove a deployed Cloud Run revision or authenticated operator session.