import type { LlmToolsConfiguration } from './LlmToolsConfiguration';
/**
 * Provides LLM tools configuration by reading environment variables.
 *
 * Note: `$` is used to indicate that this function is not a pure function - it uses filesystem to access `.env` file
 *
 * It looks for environment variables:
 * - `process.env.OPENAI_API_KEY`
 * - `process.env.ANTHROPIC_CLAUDE_API_KEY`
 * - ...
 *
 * @see Environment variables documentation or .env file for required variables.
 * @returns A promise that resolves to the LLM tools configuration, or null if configuration is incomplete or missing.
 *
 * @public exported from `@promptbook/node`
 */
export declare function $provideLlmToolsConfigurationFromEnv(): Promise<LlmToolsConfiguration>;