/**
 * Non-blocking credential state management for better-email-mcp.
 *
 * State machine: awaiting_setup -> setup_in_progress -> configured
 * Reset: configured -> awaiting_setup (via explicit reset)
 *
 * Setup flows:
 *  - stdio mode (default): credentials come from env vars
 *    (EMAIL_PROVIDER + EMAIL_USER + EMAIL_APP_PASSWORD), validated up-front in
 *    `init-server.ts`. No relay form spawn.
 *  - http mode (opt-in): credentials are entered into mcp-core's shared
 *    card-group credential form served by `transports/http.ts`. The HTTP
 *    transport runs `runLocalServer` directly — there is no separate
 *    "trigger relay setup" path anymore (deleted 2026-05-01 per spec
 *    2026-05-01-stdio-pure-http-multiuser.md §5.2.1).
 *
 * Key constraint: MCP `initialize` must respond within 1 second.
 * `resolveCredentialState()` is synchronous-fast (<10ms) -- it only reads env
 * vars and the encrypted config file on disk.
 */
export type CredentialState = 'awaiting_setup' | 'setup_in_progress' | 'configured';
export declare function setMarkSetupComplete(fn: ((key?: string) => void) | null): void;
export declare function getMarkSetupComplete(): ((key?: string) => void) | null;
export declare function getState(): CredentialState;
export declare function getSetupUrl(): string | null;
export declare function setSetupUrl(url: string | null): void;
/**
 * Fast credential check. Called during server startup.
 *
 * Resolution order:
 * 1. ENV VARS -- EMAIL_CREDENTIALS already set
 * 2. CONFIG FILE -- encrypted config from previous relay setup
 * 3. SAVED OAUTH TOKENS -- Outlook tokens from previous session
 * 4. NOTHING -- state = awaiting_setup (server starts; HTTP form serves /authorize)
 *
 * Returns new state. Takes <10ms (no network I/O).
 */
export declare function resolveCredentialState(): Promise<CredentialState>;
/** For testing and setup tool actions. */
export declare function setState(newState: CredentialState): void;
/** Reset to awaiting_setup (used by setup reset action). */
export declare function resetState(): Promise<void>;
//# sourceMappingURL=credential-state.d.ts.map