/** Bounded worker-local exactly-once gate for terminal IPC emission. */
export declare class TurnTerminalDeduper {
    private readonly maxEntries;
    private readonly emitted;
    constructor(maxEntries?: number);
    /**
     * Claim one `(session, logical turn, dispatch attempt)` terminal. The first
     * caller wins regardless of status; transcript-final, submit-failure and CLI
     * exit races therefore emit one IPC message, never contradictory duplicates.
     */
    claim(sessionId: string, turnId: string, dispatchAttempt?: number): boolean;
    size(): number;
}
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