type Env = Record<string, string | undefined>;
/** Returns the detected harness name, or null when none match. */
export declare function detectHarness(env?: Env): string | null;
export type RuntimeEnv = 'container' | 'desktop';
interface FsApi {
    existsSync: (path: string) => boolean;
    readFileSync: (path: string, encoding: 'utf8') => string;
}
/** Fails open to desktop: a probe error must never break telemetry. */
export declare function detectRuntimeEnv(env?: Env, fsApi?: FsApi): RuntimeEnv;
interface HumanInitiatedStreams {
    stdin: {
        isTTY?: boolean;
    };
    stdout: {
        isTTY?: boolean;
    };
}
/**
 * True only when both ends are a real terminal — a human at a prompt. Agents
 * shell out without a TTY, so this reads false for every harness above and is
 * the free agent-vs-human signal behind `X-TF-Human-Initiated`.
 */
export declare function detectHumanInitiated(streams?: HumanInitiatedStreams): boolean;
export {};