import type { WorkflowRepository } from "./repository.js";
import type { WorkflowCallInput } from "./service.js";
/**
 * Which Workflow invocation a new run is being started on behalf of, and whether
 * that invocation may reach the target at all. A Workflow Call names its caller
 * outright; a run started from an attempt session has to be traced back to one.
 */
type CallerRepository = Pick<WorkflowRepository, "getRun" | "findAttemptBySessionId" | "listRecoverableRuns">;
type WorkflowCaller = WorkflowCallInput["caller"];
/** The invocation a session speaks for, or null when the session is not one —
 *  an operator, a cron run, or an attempt that has already settled. */
export declare function callerForSession(repository: CallerRepository, sessionId: string | undefined): WorkflowCaller | null;
/** Refuse a caller that is not a live invocation, or whose ancestry re-enters the
 *  target, loops, unwinds into a run already being cancelled, or nests deeper than
 *  a Workflow tree has any reason to go. */
export declare function assertCallableCaller(repository: CallerRepository, targetWorkflowId: string, caller: WorkflowCaller): void;
export {};
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