# kosa8 model sign

Sign a model's weights digest, for an approved model list that requires a signer

## Usage

```
kosa8 sign NAME --key FILE --signer NAME
```

Writes a signature over the SHA-256 of the model's weights with an Ed25519
key (one line of base64, as `kosa8 policy keygen --out` writes). An entry in
the org policy's allowed_models that names this key as its signer then
accepts the model; changing one byte of the weights invalidates it.

## Flags

| Flag | Type | What it does | Default |
|---|---|---|---|
| `--key` | string | Ed25519 private key file |  |
| `--signer` | string | who is signing, for the record |  |

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Source: https://docs.kosa8.com/reference/model-sign/