Ruby Weekly issue #809 covers Matz's RubyConf keynote on AI-assisted development ('Extreme Vibe Coding'), releases of Ruby 4.0.6 and 3.3.12 with security fixes, and the milestone release of Simplecov 1.0 after 15+ years. Also highlighted: Insta, a new snapshot testing library for Ruby supporting Minitest and RSpec; minitest-strict for stricter assertions; detecting SQLite full table scans in Rails; Rails 8.1 deprecated associations; and a guide to Git worktrees.
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