export type ErrorCode = "CONNECTION_REFUSED" | "TAB_NOT_FOUND" | "AUTH_REQUIRED" | "API_KEY_REQUIRED" | "TIMEOUT" | "VALIDATION_ERROR" | "NOT_IMPLEMENTED" | "GEMINI_AUTH_FAILED" | "GEMINI_RATE_LIMITED" | "GEMINI_TEMPORARY_ERROR" | "NOT_AUTHENTICATED" | "TOKEN_EXTRACTION_FAILED" | "COOKIE_ROTATION_FAILED" | "SESSION_EXPIRED" | "CAMOFOX_UNAVAILABLE" | "RETRY_EXHAUSTED" | "INTERNAL_ERROR";
export declare const GEMINI_ERROR: {
    readonly NOT_AUTHENTICATED: "NOT_AUTHENTICATED";
    readonly TOKEN_EXTRACTION_FAILED: "TOKEN_EXTRACTION_FAILED";
    readonly COOKIE_ROTATION_FAILED: "COOKIE_ROTATION_FAILED";
    readonly SESSION_EXPIRED: "SESSION_EXPIRED";
    readonly CAMOFOX_UNAVAILABLE: "CAMOFOX_UNAVAILABLE";
};
export declare class AppError extends Error {
    readonly code: ErrorCode;
    readonly status?: number;
    constructor(code: ErrorCode, message: string, status?: number);
}
export declare class RetryExhaustedError extends AppError {
    constructor(attempts: number, lastError: Error);
}
export interface ToolResult {
    [key: string]: unknown;
    isError?: boolean;
    content: Array<{
        type: "text";
        text: string;
    } | {
        type: "image";
        data: string;
        mimeType: string;
    }>;
}
export declare function okResult(data: unknown): ToolResult;
export declare function toErrorResult(error: unknown): ToolResult;
export declare function normalizeError(error: unknown): AppError;
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