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

# act

> Let the AI agent accomplish a goal autonomously.

Hands a natural-language goal to the AI agent, which performs whatever taps,
types, and scrolls are needed to accomplish it. Reach for `act` when the exact
UI path is unknown or brittle; use a single `tap`/`type` when you already know
the step. The simplified form takes the goal as a single string.

## Parameters

| Parameter | Type      | Required | Description                                                 |
| --------- | --------- | -------- | ----------------------------------------------------------- |
| `goal`    | `string`  | Yes      | What the agent should accomplish.                           |
| `version` | `string`  | No       | AI action version to run with (e.g. `"2"`).                 |
| `saveAs`  | `string`  | No       | Variable to store this step's return value on `env.<name>`. |
| `retries` | `number`  | No       | Times to retry the step on failure before failing the test. |
| `skipped` | `boolean` | No       | Skip this step at execution time.                           |

## Shorthand

Goal as a single string.

```yaml theme={null}
- act: Complete the new-user signup flow using a fresh email
```

## Examples

```yaml theme={null}
- act:
    goal: Add the cheapest in-stock item to the cart
    version: "2" # pin this step to a specific AI action version
```

## Related

* [Test format](/core-concepts/test-format)
* [Agentic testing](/core-concepts/agentic-testing)