> ## Documentation Index
> Fetch the complete documentation index at: https://docs.app.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 Vercel AI SDK 7 carries 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="Vercel AI SDK 7" href="/platform/ui/ai-sdk">Typed generative UI messages.</Card>
</CardGroup>

## Evidence status

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