Skip to content

claude-code

v2.1.201 Breaking

This release includes 1 breaking change for platform teams planning a safe upgrade.

Published 23d Developer Productivity
✓ No known CVEs patched
Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Summary

AI summary

Claude Sonnet 5 sessions no longer use the mid‑conversation system role for harness reminders.

Full changelog

What's changed

  • Claude Sonnet 5 sessions no longer use the mid-conversation system role for harness reminders

Breaking Changes

  • Removed use of the mid‑conversation system role for harness reminders in Claude Sonnet 5 sessions
View diff on GitHub

Weekly OSS security release digest.

The CVE patches and breaking changes that affected production tools this week. One email, every Sunday.

No spam, unsubscribe anytime.

Share this release

Share on X Share on Bluesky

Track claude-code

Get notified when new releases ship.

Sign up free

About claude-code

All releases →

Related context

Earlier breaking changes

  • v2.1.215 Claude no longer automatically runs /verify and /code-review skills
  • v2.1.160 Renames dynamic‑workflow trigger keyword from `workflow` to `ultracode`; `workflow` no longer triggers a run
  • v2.1.160 Deprecates and removes the `CLAUDE_CODE_OPUS_4_6_FAST_MODE_OVERRIDE` environment variable; it is now a no‑op
  • v2.1.147 Renames /simplify to /code-review; removes cleanup-and-fix behavior.

Beta — feedback welcome: [email protected]