What's wrong with this entry?
When the auto-compact threshold is set by a server experiment (not user config), a notification now shows the threshold and how to override it: compacted at N · override with CLAUDE_CODE_AUTO_COMPACT_WINDOW=1000000.
Auto-compact notification (search for "override with CLAUDE_CODE_AUTO_COMPACT_WINDOW")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.