import type { BlockSpec, BlockPlacement } from "./types.js";
/**
 * In-memory block registry. Holds two lookups: by runtime `type` (render +
 * serialize side) and by MDX `tag` (parse side). The registry is a plain object
 * usable both inside React (via the context provider) and outside it (the
 * server MDX serializer/parser, agent schema export) — mirroring how the legacy
 * `BLOCK_COMPONENTS` set and `serializeBlock`/`parseBlock` are plain functions.
 */
export declare class BlockRegistry {
    private byType;
    private byTag;
    /**
     * Register (or re-register) a block spec. Last registration wins: re-registering
     * an existing block `type` (or MDX `tag`) OVERRIDES the previous spec rather than
     * throwing. This lets an app intentionally override a shared library block with
     * its own variant, and makes module-level registration idempotent under dev HMR
     * (which can re-run a registration module against a registry that survived the
     * reload). When a re-registered type changes its MDX tag, the stale tag mapping
     * is dropped so `getByTag` can't return an orphaned spec.
     */
    register(spec: BlockSpec<any>): void;
    get(type: string): BlockSpec<any> | undefined;
    getByTag(tag: string): BlockSpec<any> | undefined;
    has(type: string): boolean;
    hasTag(tag: string): boolean;
    /** All registered MDX tags — replaces the hardcoded `BLOCK_COMPONENTS` set. */
    tags(): Set<string>;
    /**
     * The set of registered block `type`s whose specs declare
     * `notionCompatible: true` — i.e. they round-trip to Notion-Flavored Markdown
     * and may sync to Notion. Apps use this as the registry-backed part of their
     * Notion gating allowlist; prose-only NFM analogs that are not registry atoms
     * (rich-text, callout) are NOT in here — apps union those in separately.
     */
    notionCompatibleTypes(): Set<string>;
    /** All registered specs, optionally filtered by placement. */
    list(placement?: BlockPlacement): BlockSpec<any>[];
}
/** Register a batch of specs in order. */
export declare function registerBlocks(registry: BlockRegistry, specs: BlockSpec<any>[]): void;
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