/** The steps that may report. A closed set: an open one turns this into a log. */
export type InstallStep = 'cli_login_probe' | 'cli_login_device' | 'cli_mcp_config' | 'cli_first_sync' | 'cli_node_version';
export interface InstallFailure {
    step: InstallStep;
    /** The classification, not the prose: 'dns', 'tls', 'timeout', 'HTTP 502'. */
    reason?: string | null;
    /** One line, already free of paths. Truncated again server-side. */
    message?: string | null;
}
/**
 * Post one failure. Resolves whether or not it was sent.
 *
 * `serverUrl` decides WHERE to report and is never part of the payload. When the
 * user has opted out, or the server has not said telemetry is allowed, this does
 * nothing at all.
 */
export declare function reportInstallFailure(serverUrl: string, failure: InstallFailure, opts?: {
    fetchImpl?: typeof fetch;
    timeoutMs?: number;
}): Promise<boolean>;
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