/**
 * The abort-signal RACING vocabulary the park lane's synchronous-wait seats stand on — the per-call signal
 * composition, the value-mapping race and the tagged three-state race — moved whole out of the orchestrator so
 * the ask-lane phase (adjudicate / resolveAsk), the suspend-saga phase (the paused-VM compensation) and the
 * park-ask phase (the content-ask delivery race, the projection re-adjudication, the fence) reach DOWN for the
 * same three helpers instead of each carrying a copy. Pure: no engine state, no clock.
 */
/**
 * The per-call signal composition all three synchronous-wait seats share
 * (adjudicate / resolveAsk / resolveContentAsk): `AbortSignal.any([run, call])` when the gate
 * threaded a per-call signal, the bare run signal otherwise (host-driven gates and unthreaded emits
 * keep the historical binding byte for byte). The run signal is ALSO composed into the loop's turn
 * controller, so the double source is a belt, not a dependency — this layer must not assume the
 * loop's internal wiring. The composed product lives exactly as long as the one wait it bounds
 * (both sources outlive it), so nothing here retains across calls.
 */
export declare function composeCallSignal(runSignal: AbortSignal, callSignal: AbortSignal | undefined): AbortSignal;
/** How a raced await ended. The generalized sibling of the ask-side
 *  `raceAskWaitAgainstSignal` (tool-policy.ts): same three-state form over any value domain.
 *  `aborted` means the SIGNAL settled the race — the promise may still be pending and stays the
 *  caller's to detach. `threw` reports the rejection AS a rejection, never folded into the abort
 *  arm: the value-mapping `raceAbort` below resolves `onAbort()` for a rejection too, which at a
 *  DECISION seat would disguise a real failure as a concession (and feed the concession value into
 *  whatever door consumes the raced result) — a decision seat must race with THIS form. */
export type RacedSettlement<T> = {
    tag: "value";
    value: T;
} | {
    tag: "threw";
    error: unknown;
} | {
    tag: "aborted";
};
/** Settle a raced await the moment `signal` aborts, WITHOUT waiting for the
 *  promise to notice. Pre-aborted entry answers at once; the listener is removed on settle
 *  whichever side wins (the `raceAbort` hygiene: `{once}` alone leaks a closure on the signal when
 *  the promise settles first). The mapped promise attaches BOTH handlers up front, so an abort-arm
 *  return never leaves an unhandled rejection behind. */
export declare function raceSettlementAgainstSignal<T>(p: Promise<T>, signal: AbortSignal): Promise<RacedSettlement<T>>;
/** Race a promise against an abort signal; on abort, resolve with `onAbort()`. Cleans up its listener. */
export declare function raceAbort<T>(p: Promise<T>, signal: AbortSignal, onAbort: () => T): Promise<T>;