upstream-notebooklm-auth-needs-two-files-not-one
The upstream notebooklm-mcp-cli expects two auth files at $NOTEBOOKLM_MCP_CLI_PATH/profiles/default/: cookies.json (30 cookies with specific format including extracted_at timestamp) and metadata.json. The legacy notebooklm-py used a single storage_state.json in a different schema. CSRF token and session_id fields in cookies.json can be empty strings — the upstream auto-extracts them on first API call.