export type InputTurnState = 'inflight' | 'committed';
/**
 * Worker-local idempotency fence for daemon retries.
 *
 * A retry can arrive while the first IPC handler is still committing the same
 * turn. Keep that distinct from a committed duplicate: inflight duplicates are
 * ignored and wait for the original ACK, while committed duplicates re-ACK
 * without entering the CLI input queue again.
 */
export declare class InputTurnDeduper {
    private readonly maxCommitted;
    private readonly states;
    constructor(maxCommitted?: number);
    begin(turnId: string): 'new' | InputTurnState;
    commit(turnId: string): void;
    release(turnId: string): void;
    state(turnId: string): InputTurnState | undefined;
    private pruneCommitted;
}
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