import type { NdjsonParallelMetadata, NdjsonWorkflowStackEntry } from './types.js';
/** Maximum size of a canonical identity written to a session record. */
export declare const MAX_NDJSON_PARALLEL_ID_LENGTH = 128;
export interface NdjsonParallelMetadataInput {
    readonly stack: readonly NdjsonWorkflowStackEntry[] | undefined;
    readonly stepName?: string;
    readonly stepKind?: NdjsonWorkflowStackEntry['kind'];
    /** True only when the event's step is the parallel parent itself. */
    readonly isParallelParent?: boolean;
}
/**
 * Derive the canonical parallel role from the runtime resume stack.
 *
 * Direct agent participants intentionally have no frame of their own in the
 * legacy stack (`[parallel]`).  Their event step is therefore part of the
 * identity, while direct workflow calls use the explicit call frame.  A
 * deeper child stack keeps the direct call identity, but is not itself a
 * participant.
 */
export declare function buildNdjsonParallelMetadata(input: NdjsonParallelMetadataInput): NdjsonParallelMetadata | undefined;
/** Parse optional metadata from an untrusted NDJSON/cache value. */
export declare function parseNdjsonParallelMetadata(value: unknown, path?: string): NdjsonParallelMetadata | undefined;
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