569 -> 211 across three libs. All seven heredocs sit inside functions,
so function boundaries were safe seams.
The script guards its entry with SETUP_DNS_BLOCKER_SKIP_MAIN, which made
a real function-set comparison possible on a script that would otherwise
reconfigure the machine when sourced: an identical 74 names against a
detached worktree at HEAD. The dns-blocklist-refresh unit still resolves
to it and it still parses.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011w2Pj4Ek3ZNMQVYcFHgXDY
