import { type FabricWorkflowItemStatusV1 } from "../protocol.js";
import { isWorkflowItemId, WORKFLOW_ITEM_ID_MAX_CHARS } from "./store.js";
export { isWorkflowItemId, WORKFLOW_ITEM_ID_MAX_CHARS };
export declare const WORKFLOW_ITEM_META_MAX_BYTES: number;
export interface WorkflowItemTransitionInput {
    id: string;
    status: FabricWorkflowItemStatusV1;
    meta?: Record<string, unknown>;
}
/**
 * Fail-closed validation for the stable-identity fields of one
 * `workflow.item` call. The guest input is never mutated: the durable trace
 * keeps projecting the original arguments, so `meta` never reaches it.
 */
export declare const validateWorkflowItemInput: (args: Record<string, unknown>, defaultId: () => string) => WorkflowItemTransitionInput;
type EmitEvent = (channel: string, data: unknown) => void;
/**
 * Per-invocation item status ledger. Emits one host event per status
 * transition; listeners observe and can never block or fail the program.
 */
export declare class FabricWorkflowItemTransitions {
    #private;
    readonly invocationId: string;
    readonly emit: EmitEvent | undefined;
    readonly sessionId?: string | undefined;
    constructor(invocationId: string, emit: EmitEvent | undefined, sessionId?: string | undefined);
    /** Matches the activity store's historical `item-<n>` fallback. */
    nextDefaultId(): string;
    record(input: WorkflowItemTransitionInput, label: unknown): void;
    /** Mirrors the activity store: only running items settle with the run. */
    finish(success: boolean): void;
}
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