> ## 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.

# Runtime and automation platform

> How ECS Fargate and EventBridge Scheduler host and wake Harmonia's durable workflow.

## How Harmonia uses it

ECS Fargate hosts the web application and worker. EventBridge Scheduler invokes authenticated maintenance and heartbeat endpoints; those ticks claim durable work rather than holding in-memory timers.

<CardGroup cols={2}>
  <Card title="ECS Fargate" href="/platform/runtime/fargate">Stateless web and worker services.</Card>
  <Card title="EventBridge Scheduler" href="/platform/runtime/eventbridge">Authenticated durable wakeups.</Card>
</CardGroup>

## Evidence status

Build and local process tests do not prove deployment. A deployed revision, service identity, scheduler invocation, and resulting durable state change need authenticated capture.