import { RAGServer } from './server/index.js';
import type { GroupingMode } from './vectordb/index.js';
/** Result of parsing an environment variable */
export interface ParseResult<T> {
    value: T | undefined;
    warning?: string;
}
/**
 * Parse grouping mode from environment variable
 */
export declare function parseGroupingMode(value: string | undefined): ParseResult<GroupingMode>;
/**
 * Parse max distance from environment variable
 */
export declare function parseMaxDistance(value: string | undefined): ParseResult<number>;
/**
 * Parse max files from environment variable
 */
export declare function parseMaxFiles(value: string | undefined): ParseResult<number>;
/**
 * Parse hybrid weight from environment variable
 */
export declare function parseHybridWeight(value: string | undefined): ParseResult<number>;
/**
 * Parse chunk minimum length from environment variable
 */
export declare function parseChunkMinLength(value: string | undefined): ParseResult<number>;
/**
 * Resolve the full RAGServer configuration from environment variables.
 *
 * Pure (no process.exit, no transport): `env` and `cwd` are passed in so the
 * entry-point wiring can be exercised directly in tests instead of via a copy.
 * Single source of truth for BASE_DIRS / BASE_DIR / cwd precedence, the
 * sensitive-path policy on both raw and realpath-normalized roots, and the
 * never-fall-back-to-cwd-on-error rule.
 */
export declare function resolveServerConfig(env: NodeJS.ProcessEnv, cwd: string): Promise<ConstructorParameters<typeof RAGServer>[0]>;
/**
 * Start the RAG MCP Server
 * Configuration is read from environment variables only (no CLI flags).
 * This ensures the bare `mcp-local-rag` launch is suitable for MCP clients.
 */
export declare function startServer(): Promise<void>;
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