/**
 * @license
 * Copyright 2023 Nuraly, Laabidi Aymen
 * SPDX-License-Identifier: MIT
 */
import type { ChatbotArtifact } from '../chatbot.types.js';
import { ChatPluginBase } from './chat-plugin.js';
/**
 * JSON Graph Renderer Plugin — renders JSON artifacts as a visual node graph
 * in the artifact panel, while non-JSON artifacts fall back to default rendering.
 *
 * Demonstrates the `renderArtifactContent` plugin hook: when registered, the
 * chatbot component picks up the renderer automatically — no extra property
 * wiring needed.
 *
 * @example
 * ```typescript
 * const controller = new ChatbotCoreController({
 *   plugins: [
 *     new MarkdownPlugin(),
 *     new ArtifactPlugin(),
 *     new JsonGraphRendererPlugin()
 *   ]
 * });
 * ```
 */
export declare class JsonGraphRendererPlugin extends ChatPluginBase {
    readonly id = "json-graph-renderer";
    readonly name = "JSON Graph Renderer";
    readonly version = "1.0.0";
    /**
     * Custom artifact content renderer.
     * Returns an HTML string for JSON artifacts; returns empty string for
     * anything else so the default renderer takes over.
     */
    renderArtifactContent(artifact: ChatbotArtifact): string;
    /** Recursively render a key/value pair as a tree node */
    private renderNode;
    private typeColor;
    private typeBg;
    private formatValue;
}
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