Claude Code v2.1.201: Harness Reminder Change for Claude Sonnet 5 Sessions
Claude Code v2.1.201 is a focused update that changes how harness reminders are delivered in Claude Sonnet 5 sessions, no longer using the mid-conversation system role.
The Claude Code team has released version 2.1.201, a small, focused update with a single change to how the harness communicates with the model in Claude Sonnet 5 sessions. While this release is light on visible features, adjustments to prompt plumbing like this one can subtly influence how the model interprets internal reminders during a conversation.
What’s New
Harness Reminders in Claude Sonnet 5 Sessions
Claude Sonnet 5 sessions no longer use the mid-conversation system role for harness reminders. This changes the mechanism by which Claude Code delivers its internal reminder messages to the model partway through a conversation when running on Claude Sonnet 5.
That is the only change listed in this release — there are no other new features or bug fixes documented for v2.1.201.
How to Update
To update to Claude Code v2.1.201:
- Check your current version:
claude --version - Update using your preferred method:
- Package manager: Follow your distribution’s update process
- Direct download: Visit the release page for platform-specific binaries
- Restart any active sessions to ensure the new behavior takes effect