import { OrderingTokenSource } from "./ordering.js";
/**
 * A modality-filtered candidate, resolved to a concrete v4 model. `fullIndex` is
 * the candidate's position in the original (unfiltered) entries array — used to
 * drive cooldown stickiness.
 */
export declare const FRAMING_PARTS: ReadonlySet<string>;
export declare function streamSignalAborted(signal: AbortSignal | undefined): boolean;
export declare function streamAbortReason(signal: AbortSignal | undefined): unknown;
export declare function streamCancelReason(reason: unknown): unknown;
export declare const MAX_PRELUDE_PARTS = 1024;
export declare const MAX_PRELUDE_TEXT_CHARS = 1048576;
export declare const MAX_PRELUDE_METADATA_NODES = 10000;
export declare const MAX_STREAM_WARNINGS = 1024;
export declare const MAX_STREAM_WARNING_CHARS = 1048576;
export declare const MAX_STREAM_WARNING_FIELD_LENGTH = 65536;
export declare const MAX_STREAM_JSON_CONTAINERS = 50000;
export declare const MAX_STREAM_JSON_CHARACTERS = 4194304;
export declare const MAX_STREAM_METADATA_CHARACTERS = 4194304;
export declare const MAX_STREAM_METADATA_FIELD_LENGTH = 65536;
export declare const MAX_STRICT_TRACKED_IDS = 1024;
export declare const MAX_STREAM_CANDIDATES = 10000;
export declare const MAX_STREAM_DURATION_MS = 86400000;
export declare const fallbackOrderingTokens: OrderingTokenSource;
export declare const ORDERING_TOKEN_RE: RegExp;
export declare const FINISH_REASONS: Set<string>;
export declare const PROVIDER_METADATA_PARTS: Set<string>;
export declare const STREAM_PART_FIELDS: Readonly<Record<string, readonly string[]>>;
export declare class AsyncStreamFieldError extends Error {
}
export declare function streamField(value: object, key: string | number): unknown;
export declare function streamDiscriminant(value: object, key: string, siblingKeys: readonly string[]): unknown;
export declare function captureStreamSiblings(tasks: readonly (() => void)[]): void;
export declare const ASYNC_STREAM_FIELD: unique symbol;
export declare function captureStreamSiblingValue(task: () => unknown, failure: {
    error?: AsyncStreamFieldError;
}): unknown | typeof ASYNC_STREAM_FIELD;
export declare function snapshotRecordFields(value: object, type: unknown, fields: readonly string[], failure?: {
    error?: AsyncStreamFieldError;
}): Record<string, unknown>;
export declare function snapshotStreamFinishReason(value: unknown): unknown;