export interface SiteAuthVerifier {
    provider: string;
    destinationUrl: string;
    isAuthenticated: (snapshotText: string, url: string) => boolean;
    isLoginOrChallenge: (snapshotText: string, url: string) => boolean;
}
export interface AuthCheckPage {
    url: string;
    snapshotText: string;
}
export type AuthCheckResult = {
    status: 'authenticated';
} | {
    status: 'auth-required';
    provider: string;
    url: string;
} | {
    status: 'unknown';
};
export declare function checkSiteAuth(verifier: SiteAuthVerifier, page: AuthCheckPage): AuthCheckResult;
export declare const gmailVerifier: SiteAuthVerifier;
export declare const githubVerifier: SiteAuthVerifier;
export declare const BUILTIN_VERIFIERS: Record<string, SiteAuthVerifier>;
export interface AuthBrowser {
    openPage(url: string): Promise<{
        url: string;
        snapshotText: string;
    }>;
}
export declare function ensureSiteAuthenticated(browser: AuthBrowser, verifier: SiteAuthVerifier): Promise<AuthCheckResult>;
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