You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
PerformanceArea: what it touches
ImprovementsKind: in v2.1.299,
ImprovementsSection of the release
What
Standard error, or stderr, is the channel programs use for error and status messages. If messages written there back up for more than 10 seconds and more than 1 MiB, Claude Code now drops them and writes a notice in their place saying messages were dropped. The debug log gets a similar note.
For background sessions, advice about command-line flags now says to run /stop, then claude --resume from your shell.
Why
A program that stops reading Claude Code's error output can no longer make Claude Code hang. Some of those messages may be lost, and the notice tells you so.
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeFixed bare mode notices in background sessions telling you to restart without --bare, which keeps the mode; they now name /stop and claude…
