Three Agent Classes

Agentronics models agents by how they interact with the page:

Class	Interaction path	Detection confidence
webmcp	Structured tools through navigator.modelContext	Stable, exact signal when present
dom	Browser automation over DOM/click/type APIs	Beta, heuristic confidence score
screenshot	Pixel-level mouse and keyboard control	Not reliably detectable client-side

const identity = await client.detect()
 
if (identity?.class === 'webmcp') {
  // Structured tool client.
}

Screenshot agents should declare themselves with presentIdentity() or authenticate() if they need more trust than anonymous browsing.