notebooklm-mcp-cli-path-env-controls-auth-location

The NOTEBOOKLM_MCP_CLI_PATH environment variable controls where the upstream notebooklm-mcp-cli loads and writes auth profiles. Set it to a bind-mounted host directory (e.g., /config inside container → /opt/shared/notebooklm-config/ on host) to persist auth across container rebuilds. Without this, auth is lost on every container recreation.