/**
 * Weavetab — cdp/extension.ts
 * Extension detection and health-check layer.
 * All extension-dependent tools should call requireExtension() before proceeding.
 * Weavetab by fy2ne
 */
import CDP from "chrome-remote-interface";
/**
 * Check whether the Weavetab extension is loaded in the current page.
 * Uses DOM markers instead of JS globals because content scripts run in
 * an ISOLATED world (MV3) — window.__Weavetab is invisible from MAIN world.
 */
export declare function isExtensionLoaded(session: CDP.Client): Promise<boolean>;
/**
 * Throws a clear, actionable error if the extension is not loaded.
 */
export declare function requireExtension(session: CDP.Client): Promise<void>;
/**
 * Full health check — which extension features are available.
 */
export declare function extensionHealth(session: CDP.Client): Promise<{
    loaded: boolean;
    version?: string;
    features: string[];
}>;
/**
 * Suppress all visual overlays/borders the extension draws on interactive elements.
 * Call this before taking screenshots or when clean rendering is needed.
 * Default behavior for browser_map — overlays should only appear via browser_highlight.
 */
export declare function suppressOverlays(session: CDP.Client): Promise<void>;
/**
 * Re-enable visual overlays for debugging purposes.
 * Only call this if user explicitly passes show_overlays: true to browser_map.
 */
export declare function restoreOverlays(session: CDP.Client): Promise<void>;