import type { Runner } from "./runner/runtask.js";
import type { TaskResult, TaskSpec } from "./types.js";
/**
 * design/114 P0 — a convenience for the RECOMMENDED safe warm-resume of a (failed / timed-out) run: FORK the
 * session, then run a continuation on the fork. Fork-first is the safe path (design/114 §3.2):
 *  - **idempotent** — each call branches a FRESH session, so resuming twice can't corrupt the source's linear
 *    history (vs `runTask({sessionId})` reuse, which appends two divergent continuations onto one history);
 *  - **orphan-safe** — the fork drops an in-flight tool call (`settledForkOptions`), so a continuation of an agent
 *    that died mid-tool-call gets a clean point rather than inheriting an `[INTERRUPTED]` orphan;
 *  - **fail-loud** — a missing source returns `null`; it NEVER silently starts a fresh EMPTY run the way
 *    `runTask({sessionId})` would via create-on-miss (the "looks warm, actually fresh" trap). Cross-restart /
 *    cross-replica warm-resume therefore requires a DURABLE `SessionRepo` — an in-memory fork is lost on restart.
 *
 * Returns `null` when the store can't fork OR the source session is gone — the caller decides what to do (surface
 * an error, fall back, etc.), never a silent fresh run. `sessionId` typically comes from a failed
 * `WorkflowAgentRun.sessionId` (design/114) or a prior `TaskResult.sessionId`. The continuation's `objective` is
 * the directive for picking up the work; pass the model (and any other spec fields) via `opts` — a continuation
 * still needs a model like any task.
 */
export declare function warmResume(runner: Runner, sessionId: string, objective: string, opts?: Omit<Partial<TaskSpec>, "objective" | "sessionId"> & {
    owner?: string | null;
}): Promise<TaskResult | null>;
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