- Allow MIRRORS to contain plain URLs (one per line) in addition to legacy "NAME URL" - Treat strings as single URLs to avoid iterable pitfalls - Write PyPI URLs as metadata-only entries (never added to git config) - Keep MIRRORS as the single source of truth for mirror setup - Update integration test to assert URL-only MIRRORS output https://chatgpt.com/share/6941a9aa-b8b4-800f-963d-2486b34856b1