export interface InstallConfig {
    apiKey: string;
    installationId: string;
    endpointUrl: string;
    tools: string[];
    /** Control plane URL (the SaaS dashboard). The data plane polls this for
     * config, sends telemetry uplink, and syncs spend. Copied from the
     * installation/generate screen in the dashboard. */
    controlPlaneUrl?: string;
    /** 'systray' (default, full-featured) | 'endpoint' (headless proxy, no system tray) */
    mode?: string;
    /** When true, enables Anthropic passthrough (forward client's own Anthropic
     * credential to api.anthropic.com instead of using a keystore key). */
    anthropicPassthrough?: boolean;
}
/**
 * The Monk Router app directory: ~/.monk-router/ on all platforms.
 */
export declare function appDir(homeDir?: string): string;
/**
 * Path to config.json inside the app directory.
 */
export declare function configPath(homeDir?: string): string;
/**
 * Path to the bin directory where the downloaded binary is extracted.
 */
export declare function binDir(homeDir?: string): string;
/**
 * Path to the embedding model directory. The Go router expects the Jina
 * ONNX model + tokenizer files here. The installer downloads the model
 * archive from the GitHub release and extracts it to this path.
 */
export declare function modelDir(homeDir?: string): string;
/**
 * Write config.json with the installer-provided fields. The installer
 * manages only its own fields (router_api_key, installation_id,
 * endpoint_url, control_plane_url, tools, mode, anthropic_passthrough);
 * all other fields (port, paths, routing params, presets, etc.) are
 * filled in by the Go binary on first launch and may be changed at
 * runtime via the tray UI.
 *
 * If a config.json already exists, it is **merged** — the installer updates
 * its own fields but preserves any runtime-set fields (e.g.
 * anthropic_passthrough toggled via the tray, mode, preset, alpha). This
 * prevents re-running the installer from silently wiping user preferences.
 */
export declare function writeConfig(cfg: InstallConfig, homeDir?: string): string;
/**
 * Read config.json if it exists, returning the parsed installer fields.
 * Returns null if the file does not exist (first install).
 */
export declare function readConfig(homeDir?: string): InstallConfig | null;