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

# Asset identity

> Keep actions and source relationships attached to the exact output asset.

Every output receives a Keeps asset ID. You also supply one stable external ID
from your own database.

Use either exact reference later:

1. Keep the returned `result.assetIds[index]` or `result.asset_ids[index]`.
2. Or reuse the same external output ID supplied to `complete()`.

External IDs must be unique within a workspace.

Keeps never uses a URL, filename, timestamp, prompt, hash, or embedding to infer
asset identity. Those values can help with fetching or discovery, but they
cannot safely attribute a product action.

For an edit or remix, pass the input asset's Keeps ID or external ID in
`sourceAssets`/`source_assets` when starting the new generation.