- Add normalize_url() helper function in commands.py - Automatically prefix URLs without scheme (e.g. github.com → https://github.com) - Applies to both -link flag and auto-detected URLs - Add 5 new tests for URL normalization - Fix existing tests to handle 5-value return from parse_args() Examples: /add Fix bug github.com/user/repo → stored as: https://github.com/user/repo