import { type ExploreToolOptions, type PiToolDefinition } from "./tools/explore.js";
export declare const VERSION = "0.1.0";
export declare const PROMPT_GUIDELINES: string;
export declare const PROMPT_SNIPPET = "Use codegraph_explore for structural code understanding and symbol relationships.";
export interface PiExtensionHost {
    registerTool?: (tool: PiToolDefinition) => boolean | void;
    tools?: Map<string, any> | Record<string, any>;
    addPromptGuidelines?: (guidelines: string) => void;
    promptGuidelines?: string[];
    addPromptSnippet?: (snippet: string) => void;
}
/**
 * Registers the pi-codegraph extension in the Pi session context.
 * Idempotent: If `codegraph_explore` is already registered, duplicate registrations are skipped.
 */
export declare function registerPiExtension(pi: PiExtensionHost, options?: ExploreToolOptions): void;
export default registerPiExtension;
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