All New Claude Code Updates

Claude Code ships new versions almost every few days. This guide covers versions 2.1.309 to 2.1.319, released between October 22 and November 6, 2026, and picks the changes most users will notice. Run claude update and check the official changelog for every detail.

Small updates add up. A few of these can change how you work every day.

Fast mode for Opus 4.8 was deprecated on October 30, 2026, and will be removed on November 30, 2026. After that, fast-mode requests on Opus 4.8 return an error. Switch to Opus 5.5 to keep the speed boost.

In 2.1.319, when an MCP tool call runs as a long task, Claude Code moves it to the background and tells Claude when it finishes, so your session keeps going. You can turn this off with an environment variable if you prefer to wait.

denyInsteadOfPrompting

A call that would wait on a permission prompt is denied and the turn carries on, useful for unattended runs

blockWritesOutsideWorkingDirectories

Write and Edit tools refuse paths outside your project folders, in every permission mode

Safer bypass mode

In the Desktop app and VS Code, dangerous rm commands are denied immediately in bypass mode

• ultrathink now runs at xhigh effort on Opus 5.5, Sonnet 5.5, Haiku 5.5, and Fable 5.1
• CLAUDE_CODE_DISABLE_ULTRATHINK turns the keyword off
• CLAUDE_CODE_SUBAGENT_EFFORT sets a default effort for subagents
• Subagents on a different model use that model’s saved effort level

• Idle compaction in VS Code and the Desktop Code tab summarises big idle conversations
• Usage messages now say “5-hour limit” instead of “session limit”
• Background subagents move long shell commands to the background after 3 minutes

• claude auth status shows when your sign-in expires
• claude -p warns 10 days before a claude.ai sign-in ends

• /claude-api latency-optimize finds slow settings in Claude API code and tests faster ones
• /claude-api builds Managed Agents teams with dynamic workflows by default
• New agents get an auto permission policy by default unless you opt out

• A self-paced /loop now ends when a turn finishes without rescheduling
• /tasks shows finished subagents under “Earlier in this session”
• /schedule warns when a new cloud task gets connectors you did not ask for

• Team and Enterprise server-managed settings apply without an approval prompt
• Gateway admins get cost reports, pooled budgets, and more controls
• ultrareview now requires workspace trust

• Update Claude Code
• Move off Opus 4.8 fast mode before November 30
• Turn on blockWritesOutsideWorkingDirectories for extra safety
• Try ultrathink on your hardest task
• Skim the official changelog weekly