/**
 * Minimal .env file parser shared across Lobu CLIs.
 *
 * Skips blank lines and comments, supports `KEY=VALUE` pairs, strips a single
 * pair of surrounding double or single quotes, and validates the key against
 * the POSIX-style shell identifier pattern. Later occurrences of the same key
 * overwrite earlier ones (matching `dotenv` semantics).
 */
export declare function parseEnvContent(content: string): Record<string, string>;
/**
 * Read the project `.env` in `cwd`, falling back to {} when the file is
 * absent. Shell environment always wins — callers check `process.env` first
 * and use this only as the project-local fallback.
 */
export declare function readProjectEnvFile(cwd: string): Promise<Record<string, string>>;
/** Read one variable from the project `.env` in `cwd` ("" when absent). */
export declare function readProjectEnvValue(cwd: string, key: string): Promise<string>;
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