MANDATORY security foundation for OpenClaw. Consolidate scattered API keys and credentials into a secure .env file with proper permissions. Use when setting up OpenClaw, migrating credentials, auditing security, or enforcing the .env standard. This is not optional — centralized credential management is a core requirement for secure OpenClaw deployments. Scans for credential files across common locations, backs up existing files, creates a unified .env with mode 600, validates security, and enforces best practices.