import type { JsonValue } from "../state/json.js";
import type { WorkflowDefinitionSnapshot, WorkflowRunState, WorkflowStepRecord, WorkflowTraceEventDraft } from "./types.js";
/** Worker proposals carry one change, never a replacement run projection. */
export type WorkflowTransition = {
    event: WorkflowTraceEventDraft;
} & ({
    kind: "startAttempt";
    startedAt: string;
} | {
    kind: "finishAttempt";
    step: WorkflowStepRecord;
} | {
    kind: "setTimeout";
    timeoutMs: number | null;
} | {
    kind: "resume";
    attemptId?: string;
} | {
    kind: "pause";
} | {
    kind: "resumeInteraction";
} | {
    kind: "waitForInput";
    requestId: string;
    requestKind: "checkpoint" | "decision";
    contract: JsonValue;
} | {
    kind: "finish";
    status: "completed" | "failed" | "timed_out" | "cancelled";
    error?: string;
    finalOutput?: unknown;
} | {
    kind: "record";
});
/** Translate engine-local state into the narrow proposal for this event. */
export declare function executionTransition(state: WorkflowRunState, event: WorkflowTraceEventDraft): WorkflowTransition;
/** Apply a validated transition to a projection read by the durable owner. */
export declare function applyExecutionTransition(current: WorkflowRunState, definition: WorkflowDefinitionSnapshot, transition: WorkflowTransition, now: string): WorkflowRunState;