A new entry from Claude's official release notes. The original text is quoted below; check the source link for context.
What changed (original text)
- Added
CLAUDE_CODE_DISABLE_ULTRATHINK, which turns theultrathinkkeyword off - Added pooled group budgets to the Claude apps gateway: one monthly budget that a group's members share, on top of each member's own limit, set with
pooled_budgeton the spend limits admin API - Added
CLAUDE_CODE_DISABLE_LOOPED_CROSS_CERT_DROPto keep system cross-certificates that certify each other in a loop, for servers whose private CA needs one - Added
CLAUDE_CODE_SUBAGENT_EFFORTto set the effort level subagents run at when nothing else names one, instead of inheriting the session's - Added
managed.policy_mode: layeredto the Claude apps gateway: every policy that matches a developer applies, each merged over the ones listed below it, not only the first - Added
guardrail.input_taggingon Claude apps gateway Bedrock upstreams, which wraps prompts in the input tags that an Amazon Bedrock guardrail's prompt attacks filter needs;all_messages_and_systemalso tags the system prompt - Deprecated fast mode for Opus 4.8 as of October 30, 2026; it will be removed on November 30, 2026. After removal, fast mode requests on Opus 4.8 return an error and do not fall back to standard Opus 4.8. Migrate to Opus 5.5 to keep the speedup
- Fixed shell commands being left running on macOS and Linux when Claude Code exits by itself, for example when credentials are refused or a cloud session is archived
- Fixed bash aliases with line breaks in their value (except in Git Bash), and functions whose
Source: Claude Code changelog (view original)