import type { JsonValue } from "../../core/types.js";
import type { OrderedProjectedValue } from "../../core/ordered-projected-value.js";
import type { LiveMapCommit, LiveMapDisposer, LiveMapFeedListener, LivePath } from "../../types/livemap.types.js";
import type { LiveMapProjectedFeedEvent } from "./livemap.projected-propagation.js";
/**
 * Reads the current projected JSON value at a LiveMap path.
 *
 * Feed does not own graph traversal. Instead, Core passes a snap function into
 * `emit()`, so Feed can report the current value at the subscribed path without
 * importing or knowing about the editor.
 */
export type LiveMapSnapFn = (path: LivePath) => JsonValue | undefined;
/**
 * Create an in-memory feed registry for one LiveMap core instance.
 *
 * The hub stores path/listener pairs, accepts normalized commits from Core, and
 * emits listener events for any subscription whose path overlaps a commit op.
 * It is deliberately graph-agnostic: it never mutates nodes and never resolves
 * Hson wrappers directly.
 */
export declare function make_livemap_feed_hub(): LiveMapFeedHub;
/**
 * Runtime feed registry used by LiveMap Core.
 *
 * `add()` subscribes a listener at a data path.
 * `emit()` fans a normalized commit out to matching listeners.
 */
export type LiveMapFeedHub = Readonly<{
    add: (path: LivePath, listener: LiveMapFeedListener) => LiveMapDisposer;
    addProjected: (path: LivePath, listener: (event: LiveMapProjectedFeedEvent) => void) => LiveMapDisposer;
    emit: (commit: LiveMapCommit, snap: LiveMapSnapFn) => void;
    emitProjected: (commit: LiveMapCommit, read: (path: LivePath) => OrderedProjectedValue | undefined) => void;
}>;
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