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# Deepset

Binary prompt-injection classifier.

Encoder sequence classifier that labels a text as `LEGIT` or `INJECTION`. Feed it the raw user prompt (or any untrusted text such as retrieved snippets); no model response or extra context is involved. `validate` accepts a single string or a `list[str]`, in which case the whole list runs as one true batched inference call and a list of outputs is returned in the same order.

Verdict mapping onto `GuardrailOutput`:

* `valid` is `True` when the predicted label is not `INJECTION`.
* `score` is the probability of the `INJECTION` class (canonical risk direction: higher = riskier), regardless of which label won the argmax.
* `categories` holds the full label distribution — one entry per class with its probability; the predicted class is marked `triggered=True`.

For more information, see:

* [deepset/deberta-v3-base-injection model card](https://huggingface.co/deepset/deberta-v3-base-injection).

## Supported Models

* `deepset/deberta-v3-base-injection`

## Constructor

| Parameter  | Type                                                 | Required | Default |
| ---------- | ---------------------------------------------------- | -------- | ------- |
| `model_id` | \`str                                                | None\`   | No      |
| `provider` | `Optional[Provider[dict[str, Any], dict[str, Any]]]` | No       | `None`  |

Initialize the Deepset guardrail.

## validate

Default validation pipeline: preprocess -> inference -> postprocess.

**Parameters**

| Parameter    | Type  | Required     | Default | Description |
| ------------ | ----- | ------------ | ------- | ----------- |
| `input_text` | \`str | list\[str]\` | Yes     | —           |

**Returns:** `GuardrailOutput | list[GuardrailOutput]`

## Benchmarks

### Prompt Injection

| Dataset (rev)              | Metric | Threshold    | Value    | Harness                 | Source                           | Contam. |
| -------------------------- | ------ | ------------ | -------- | ----------------------- | -------------------------------- | ------- |
| deepset\_pi (unspecified)  | f1     | native-valid | 0.991597 | guardrail-bench+ag0.7.4 | measured:guardrail-bench+ag0.7.4 | ⚠️      |
| notinject (unspecified)    | fpr    | native-valid | 0.705263 | guardrail-bench+ag0.7.4 | measured:guardrail-bench+ag0.7.4 |         |
| gandalf (unspecified)      | recall | native-valid | 0.883929 | guardrail-bench+ag0.7.4 | measured:guardrail-bench+ag0.7.4 |         |
| bipia\_email (unspecified) | f1     | native-valid | 0.7806   | bir\@fd86c16            | measured:bir\@fd86c16            |         |
| bipia\_table (unspecified) | f1     | native-valid | 0.876783 | bir\@fd86c16            | measured:bir\@fd86c16            |         |

## License

* **Vendor:** deepset
* **Default license:** `mit` (of the default model/service)


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