- [new] Added the
MultiEditbuilt-in tool. - [removed] Removed the
--mcp-debugCLI flag. - [changed] Updated wording in several core system prompts, including plan mode restrictions, focus mode behavior, context summarization handling, and instructions for dealing with non-user messages and rejected tool uses.
- [changed] Refined prompt text around model ID handling to clarify that suffixed variants (e.g.
-fast) should be left unchanged and flagged rather than migrated.
Models & prompts
- Clarified instructions for
claude-opus-4-6-fastand similar suffixed model strings so the agent leaves the ID intact and adds a deprecation comment when appropriate. - Strengthened plan mode guidance to explicitly block edits, non-readonly tools, and config changes.
- Updated focus mode and context management sections to better describe what the user sees and how long-running conversations are summarized.
Under the hood
- Added six new environment variables:
CLAUDE_BG_POST_CLEAR_RESPAWN,CLAUDE_CODE_COORDINATOR_PROPAGATE_NESTED_MEMORY,CLAUDE_CODE_DISABLE_BG_SHELL_PRESSURE_REAP,CLAUDE_CODE_DISABLE_NOTIFICATION_PRESENCE_CHECK,CLAUDE_CODE_ENABLE_LAUNCH_COMPOSER, andCLAUDE_CODE_SHOJI_ENGINE. - Added one new network endpoint (
https://browser-intake-us5-datadoghq.com). - Added eight new Statsig feature gates and removed two existing ones.
Upgrade notes
No special upgrade steps required.