export interface PostHogConfig {
    apiKey: string;
    host: string;
    timeoutMs: number;
}
/**
 * Resolve PostHog config from environment variables, falling back to built-in defaults.
 * An empty `apiKey` means telemetry is not configured and callers should not send.
 */
export declare function resolvePostHogConfig(env?: NodeJS.ProcessEnv): PostHogConfig;
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