> ## 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.

# S3 assets

> Quarantine, immutable assets, and digest verification.

## How Harmonia uses it

Uploads enter tenant-scoped quarantine, pass authenticated malware scanning, then promote to sealed source objects. Generated media, exports, and large records use immutable keys. Verification reads the stored bytes and recomputes SHA-256. Retained external GCS libraries are source connectors, not internal storage.

## Implementation

`src/lib/storage.ts`

## Evidence status

This AWS edition has no authenticated deployment or provider rehearsal yet. Paid validation remains disabled. Local checks are reported separately from live proof.