/**
 * Lightweight chat server for nostr-station chat.
 * Reads AI provider config from ~/.claude_env + keychain,
 * injects NOSTR_STATION.md as system context on every request,
 * and streams responses via SSE.
 * Supports both Anthropic native API and OpenAI-compatible endpoints.
 */
export declare function contextExists(): boolean;
export declare function startChatServer(port: number): Promise<void>;