/**
 * Load CARGO_* variables (plus any name in `also`) from `.env` files walking up
 * from `cwd` (default `process.cwd()`) to the filesystem root. Nearest
 * assignment wins for each key; files holding none of the wanted keys are
 * skipped so they cannot shadow a parent project's token. Never overrides
 * variables already set in the environment. Idempotent per starting directory
 * AND key set, so `getConfig()` can call it unconditionally and a later call
 * that knows more names still re-reads.
 */
export declare function loadProjectEnv(cwd?: string, also?: readonly string[]): void;
/** Test hook: forget the idempotence latch so the next call re-reads. */
export declare function resetProjectEnvForTests(): void;
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