/**
 * Application constants
 *
 * Why: Centralized constants improve readability and maintainability.
 * Magic numbers scattered through code are harder to understand and change.
 */
/**
 * Time conversion constants
 */
export declare const TIME: {
    readonly MS_PER_SECOND: 1000;
    readonly MS_PER_MINUTE: 60000;
    readonly MS_PER_HOUR: 3600000;
    readonly SECONDS_PER_MINUTE: 60;
    readonly MINUTES_PER_HOUR: 60;
};
/**
 * HTTP status codes
 *
 * Why: Named constants more readable than numeric literals.
 * Makes intent clear (STATUS_TOO_MANY_REQUESTS vs 429).
 */
export declare const HTTP_STATUS: {
    readonly OK: 200;
    readonly CREATED: 201;
    readonly ACCEPTED: 202;
    readonly NOT_MODIFIED: 304;
    readonly FOUND: 302;
    readonly MULTIPLE_CHOICES: 300;
    readonly BAD_REQUEST: 400;
    readonly UNAUTHORIZED: 401;
    readonly FORBIDDEN: 403;
    readonly NOT_FOUND: 404;
    readonly METHOD_NOT_ALLOWED: 405;
    readonly NOT_ACCEPTABLE: 406;
    readonly TOO_MANY_REQUESTS: 429;
    readonly INTERNAL_SERVER_ERROR: 500;
    readonly BAD_GATEWAY: 502;
    readonly SERVICE_UNAVAILABLE: 503;
    readonly GATEWAY_TIMEOUT: 504;
};
/**
 * MIME type constants
 *
 * Why: Prevents typos in content-type headers and ensures consistency.
 */
export declare const MIME_TYPES: {
    readonly JSON: "application/json";
    readonly EVENT_STREAM: "text/event-stream";
    readonly FORM_URLENCODED: "application/x-www-form-urlencoded";
};
/**
 * OAuth and Well-Known URL paths
 *
 * Why: Centralized OAuth-related paths for consistency and easy updates.
 */
export declare const OAUTH_PATHS: {
    readonly AUTHORIZE: "/oauth/authorize";
    readonly TOKEN: "/oauth/token";
    readonly CALLBACK: "/oauth/callback";
    readonly REGISTER: "/oauth/register";
    readonly WELL_KNOWN_AUTHORIZATION_SERVER: "/.well-known/oauth-authorization-server";
    readonly WELL_KNOWN_OPENID_CONFIGURATION: "/.well-known/openid-configuration";
    readonly WELL_KNOWN_PROTECTED_RESOURCE: "/.well-known/oauth-protected-resource/mcp";
};
/**
 * Default timeout and interval values (in milliseconds)
 *
 * Why: Centralized timing configuration for sessions, heartbeats, and cleanup.
 */
export declare const TIMEOUTS: {
    readonly SESSION_TIMEOUT_MS: number;
    readonly HEARTBEAT_INTERVAL_MS: number;
    readonly RATE_LIMIT_WINDOW_MS: 60000;
    readonly CLEANUP_INTERVAL_MS: 60000;
    readonly HTTP_REQUEST_TIMEOUT_MS: number;
};
/**
 * OAuth rate limiting defaults
 *
 * Why: Centralized OAuth rate limiting configuration to prevent duplication
 * and ensure consistency across mcp-server.ts and http-transport.ts
 */
export declare const OAUTH_RATE_LIMIT: {
    readonly MAX_REQUESTS: 10;
    readonly WINDOW_MS: 60000;
};
/**
 * OAuth state/code cleanup defaults
 *
 * Why: Keep OAuth state lifetime independent from request rate limiting.
 */
export declare const OAUTH_CLEANUP: {
    readonly STATE_TIMEOUT_MS: number;
};
/**
 * Proxy Credentials for local proxy mode (VS Code compatibility)
 *
 * Why: Centralized credentials allow overrides via environment variables
 * and prevent hardcoded secrets in the codebase.
 */
export declare const PROXY_CREDENTIALS: {
    readonly CLIENT_ID: string;
    readonly CLIENT_SECRET: string;
};
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