/**
 * OAuth Provider Configuration
 */
export interface OAuthProvider {
    /** Provider name (e.g., 'notion', 'linear') */
    name: string;
    /** Human-readable display name */
    displayName: string;
    /** OAuth authorization endpoint */
    authorizationUrl: string;
    /** OAuth token exchange endpoint */
    tokenUrl: string;
    /** Required OAuth scopes */
    scopes: string[];
    /** Client ID for the OAuth app (ralph-starter's registered app) */
    clientId: string;
    /** Client secret for the OAuth app (set via env var for security) */
    clientSecret?: string;
    /** Additional authorization URL parameters */
    authParams?: Record<string, string>;
    /** Whether this provider supports PKCE (no client secret needed) */
    supportsPKCE: boolean;
    /** Build the full authorization URL */
    buildAuthUrl(redirectUri: string, state: string, codeChallenge?: string): string;
    /** Exchange authorization code for access token */
    exchangeCode(code: string, redirectUri: string, codeVerifier?: string): Promise<OAuthTokens>;
}
export interface OAuthTokens {
    accessToken: string;
    refreshToken?: string;
    expiresIn?: number;
    tokenType: string;
    scope?: string;
}
/**
 * Base class for OAuth providers
 */
export declare abstract class BaseOAuthProvider implements OAuthProvider {
    abstract name: string;
    abstract displayName: string;
    abstract authorizationUrl: string;
    abstract tokenUrl: string;
    abstract scopes: string[];
    abstract clientId: string;
    clientSecret?: string;
    authParams?: Record<string, string>;
    /** Override in subclass to enable PKCE flow */
    supportsPKCE: boolean;
    buildAuthUrl(redirectUri: string, state: string, codeChallenge?: string): string;
    exchangeCode(code: string, redirectUri: string, codeVerifier?: string): Promise<OAuthTokens>;
}
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