/**
 * Find the project root that contains the .env config.
 *
 * Resolution order:
 * 1. CORTEX_ROOT / CORTEX_ROOT env var (explicit override)
 * 2. Walk up from this file's location to find the monorepo package.json
 * 3. Walk up from cwd to find the monorepo package.json
 * 4. cwd fallback
 *
 * Validates by checking package.json name === "nexus-cortex-monorepo",
 * so it works in both monorepo dev and flattened npm installs.
 */
export declare function findProjectRoot(): string;
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