Five dated news digests and five engineering Q&A entries. Each item cites primary documentation or release artifacts (not generic placeholders).
ruby-lang.org announces Ruby 3.4.0 with Prism replacing parse.y by default, Happy Eyeballs v2 in sockets, and YJIT memory/inline improvements.
Expect gem native extensions to require rebuilds.
The official NEWS document lists every C API tweak and stdlib behavior change—essential when maintaining forks.
Diff NEWS between patch releases before upgrading production.
Source tarball consumers should verify checksums published alongside the tag when mirroring internally.
Automate checksum verification in supply-chain jobs.
Use docs.ruby-lang.org version selectors when linking teams to stdlib APIs that changed in 3.4.
Update bookmarklets for support engineers.
Operational news complements language releases—monitor it during incident response when bundle install fails globally.
Maintain private gem mirrors for DR.
The release announcement explains it as a readable alias for simple one-argument blocks; migrate style guides gradually.
Ensure RuboCop cops align with team preferences.
The announcement notes --parser=parse.y compatibility switch; long-term support may shrink—plan to stay on Prism.
Measure boot time differences in large Rails apps.
NEWS documents unified --yjit-mem-size; capture RSS metrics before/after adjusting defaults in container limits.
Pair with jemalloc only when profiling shows benefit.
RFC 8305 defines the algorithm; Ruby’s announcement ties Socket.tcp changes to the standard—read both when debugging slow connects.
Log address family attempts separately.
Ruby 3.4 introduces modular GC hooks; container images must include any alternate GC shared objects you enable.
Validate licensing for third-party GC libraries.