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docs Teach the agent Step reference

Runs onWrit CloudDesktopSelf-hosted

Interaction step

Check

The check step sets a checkbox or radio button to checked. It is idempotent: if the control is already checked, nothing changes and the run continues.

In a workflow, this is a step object with "type": "check". Steps run in order, and each step can read the outputs of the steps before it. See the full workflows reference for the 30+ step types.

Writ runs on your own accounts, with your own credentials and data, on sites you are authorized to use.

Fields

FieldTypeDescription
selector required selector The checkbox or radio input.

Example

A single check step as it appears in a workflow's steps array:

{
  "type": "check",
  "config": { "selector": "#agree-to-terms" }
}

How it behaves

  • Idempotent: safe to run even if the box is already checked.
  • uncheck is the mirror step for clearing a checkbox.

Where it runs

The check step executes wherever the run executes. On your local or BYO agent there is no compute charge and the agent can reach intranet-only systems; on Writ cloud the run is metered by running time (~$0.12 per browser-hour, from your plan’s included usage wallet.

What next

  • Workflows - the full step vocabulary and the workflow object.
  • Recorder - capture steps by clicking through a site.
  • Managed endpoints - turn the workflow into a REST endpoint, or an MCP tool.