Claude Code v2.1.310 Adds Monitor Tool and Fixes Gateway Retry Logic

Claude Code v2.1.310 is out. The headline is the new Monitor tool: it now works on Bedrock, Vertex, and Foundry, in plugin monitors, and when telemetry or nonessential traffic is disabled. In those environments, long foreground sleeps are blocked as well.

Gateway and server compatibility fixes

• Requests that failed behind gateways or compatible servers rejecting the effort-2025-11-24 beta value or mid-conversation system messages now retry without those values instead of failing outright.
• If an MCP tool call times out in a non-interactive session while the server's elicitation is unanswered, the error now tells Claude that no answer came back and not to repeat the call.

Cleanup, compaction, and permission fixes

• Background cleanup no longer deletes recent files such as pasted images when cleanupPeriodDays is set to a very large value.
• Compaction after a "Prompt is too long" error no longer keeps dense text (base64, SVG) that could make the next request fail again.
• File read permission prompts now show where a symbolic link leads.
• The auto-continue timeout for a question no longer fires the moment an external editor closes after a long edit.
• Windows: PreToolUse and PermissionRequest hooks no longer let a tool call through when Git Bash is missing and the hook command is only quoted strings, such as a quoted path.

Improved behavior

• Auto mode's prompt before the first read outside the working directories now notes when blocking those reads will make shell commands ask for permission.
• Non-interactive sessions (-p, Agent SDK) use less memory during compaction when the transcript file is very large.
• Image rendering in tmux now works with allow-passthrough and focus-events on, plus kitty, Ghostty, and iTerm2 3.5+ fullscreen rendering, where only alt text showed before.
• Linux /sandbox and its startup warning now name Ubuntu's AppArmor restriction on user namespaces and how to lift it when bubblewrap can't start.

VSCode, Cloud sessions, Claude Tag, Code Review

• VSCode: Enter on "Send feedback and keep planning" now sends your comments instead of approving the plan. The panel no longer shows "Something went wrong" after "Switch branch & continue" on a cloud session from Session history's Web tab.
• Cloud sessions: Enterprise custom roles can now grant Claude Code cloud sessions and Remote Control permissions; admins get a confirmation prompt listing roles with those permissions. The environment dialog has a Choose file button for setup scripts, opens network access/setup script/env vars from rows, shows setup script output in a scrolling box, and surfaces save/archive and routine API token errors inside dialogs.
• Claude Tag: !restart and !help are no longer treated as ordinary messages when sent in bold, italic, or strikethrough. Admin pages survive failed bundle list refreshes, and spend limits no longer reports no channels while names load.
• Code Review: The admin section retries its first load and shows a single Try again banner instead of hiding repositories and switches after a failed refresh.

If you run Claude Code behind an incompatible gateway, in a non-interactive Agent SDK pipeline, or on Linux sandboxes, this release is worth pulling. The retry fix alone removes a class of hard failures.