- Replace walrus operator (:=) with traditional assignment in config.py - Replace datetime.fromisoformat() with strptime() for Python 3.6 - Replace subprocess capture_output and text params with PIPE and universal_newlines - All tests now pass on Python 3.6.9 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>