This now lives in a repo, PRs welcome: https://github.com/dominikmartn/black-october-check
As of 2026-10-23. For people who run AI coding agents (Claude Code, Codex, and similar) on their Mac with full shell access.
How to use it: paste this file into your agent and say: run the checks, report, then ask me before every fix.
Lines marked "What we saw" come from two Macs (macOS 26.6.2 and 27.0.1) on Oct 22 and 23. Everything else comes from the linked sources. Versions change daily, so check them against the sources.