Class RunComputerUseParams

Domains the browser is allowed to visit. If set, all other domains are blocked. If empty/undefined, all domains are allowed (open navigation).

Free-form markdown context about the application being tested. Rendered into the controller's system prompt under an "## Application Context" heading so the LLM doesn't rediscover navigation landmarks, route conventions, etc. on every test. When the engine is driven by the TestingFramework, this is typically sourced from TestSuite.Configuration. applicationContext and optionally extended per-test.

Per-domain authentication configuration

Domains explicitly blocked. Evaluated AFTER AllowedDomains — blocked always wins.

Browser-specific configuration (viewport, user agent, timeouts)

Model selection for the controller LLM

Override for the controller system prompt

Natural-language goal for the agent to accomplish

Run browser in headless mode (default: true)

Judge evaluation frequency (default: EveryStep). Use EveryNSteps or OnStagnation to reduce LLM costs.

Model selection for the judge LLM

Override for the judge prompt

Optional callback for logging engine messages. If provided, all log messages will be sent to this callback in addition to (or instead of) console output. Useful for test drivers to capture logs for test run records.

Maximum number of controller loop steps before forced termination (default: 30)

Delay in milliseconds before each screenshot capture. Gives the page time to render after actions (clicks, navigation, typing) before the screenshot is taken for the next LLM reasoning step. Set to 0 to disable. (default: 500)

Number of recent screenshots to include in controller context. Acts as a ring buffer — older screenshots are dropped. Higher values give more context but increase token usage. (default: 20)

Starting URL to navigate to

Tools the LLM can invoke during execution