v2.1.310 Claude Code Release Notes

Oct 23, 2026

Claude's Analysisby Sonnet 5.5

Monitor tool and plugin monitors now reach Bedrock, Vertex, Foundry and telemetry-off setups; a stability pass fixes gateway failures, compaction loops and file deletion.

Changes

Total Changes (vs Average)

1.4×

Version Type

Patch

Release Focus

Bug Fixes

Day Since Prior Release

Release # This Month

#22 of 22

Bug Fix Ratio

54%

Post-Release Edits

—

Change Category

Ecosystem Impact

Cloud Sessions appeared in 8 of the last 10 releases, and Claude Tag and Code Review in 5 and 6. Sustained work on cloud and admin surfaces continues, with this release adding 8 Cloud Sessions changes.

Key Themes

1Monitor tool reaches more setups|8Core reliability and data safety fixes|11Cloud sessions admin polish|2VS Code plan review and branch switching|4Terminal and sandbox clarity

May Help If You've Noticed

Plan review in VS Code approved your plan when you meant to send feedback

Added3 changes

•Added the Monitor tool and plugin monitors on Bedrock, Vertex, and Foundry, and when telemetry or nonessential traffic is disabled; long foreground sleeps are now blocked there too
•[Cloud sessions] Added Claude Code cloud sessions and Remote Control permissions to Enterprise custom roles, so Owners can control access to each by role
•[Cloud sessions] Added a Choose file button to load a cloud environment's setup script from a file

Improved6 changes

•Improved auto mode's prompt before the first read outside the working directories: it now says when blocking those reads makes shell commands ask for permission
•Improved memory use of non-interactive sessions (-p, Agent SDK) during compaction when the transcript file is very large
•Improved a mod's Image to draw inside tmux with allow-passthrough and focus-events on, in kitty, Ghostty, and iTerm2 3.5+ with fullscreen rendering, where it showed only its alt text
•Linux: Improved /sandbox and the sandbox startup warning to name Ubuntu's AppArmor restriction on user namespaces, and how to lift it, when it keeps bubblewrap from starting the sandbox
•[Cloud sessions] Improved the session start checklist to show a cloud environment's setup script output in a scrolling box
•[Code Review] Improved the Code Review admin section to retry the first load and show one Try again banner when it still fails

Fixed14 changes

•Fixed requests failing behind some gateways and compatible servers that reject the effort-2025-11-24 beta value or mid-conversation system messages; Claude Code now retries without them
•Fixed background cleanup deleting some recent files, such as pasted images, when cleanupPeriodDays is set to a very large value
•Fixed compaction after a "Prompt is too long" error keeping too much of a conversation with dense text, such as base64 or SVG, so the next request could fail again
•Fixed file read permission prompts not showing where a symbolic link leads
•Fixed a question's auto-continue timeout firing the moment the external editor closed after a long edit
•Windows: Fixed PreToolUse and PermissionRequest hooks letting a tool call through when Git Bash is missing and the hook's command is only quoted strings, such as a quoted path
•[VSCode] Fixed pressing Enter on the plan review card's "Send feedback and keep planning" button approving the plan instead of sending your comments back
•[VSCode] Fixed the panel showing "Something went wrong" after "Switch branch & continue" on a cloud session opened from Session history's Web tab
•[Cloud sessions] Fixed failed saves and archives in the cloud environment edit dialog showing no error inside the dialog
•[Cloud sessions] Fixed failed routine API token actions showing only a toast; the error now appears in the routine edit dialog
•[Claude Tag] Fixed Claude Tag treating ! commands such as !restart and !help as ordinary messages when sent in bold, italic or strikethrough
•[Claude Tag] Fixed Claude Tag admin channel and workspace pages being replaced by a load error when a background refresh of the bundle list fails
•[Claude Tag] Fixed Claude Tag's spend limits page in admin settings reporting that no channels match a filter while channel names are still loading
•[Code Review] Fixed the Code Review admin section hiding its repositories and switches after a failed refresh of the repository list

Changed3 changes

•Changed the error for an MCP tool call that times out in a non-interactive session while the server's elicitation is unanswered: it now tells Claude that no answer came and not to repeat the call
•[Cloud sessions] Changed turning on Cloud sessions or Remote Control in admin settings to ask for confirmation and list the custom roles that have that permission
•[Cloud sessions] Changed the cloud environment dialog to open network access, setup script and environment variables from rows instead of listing every editor at once

Added3 changes

•Added the Monitor tool and plugin monitors on Bedrock, Vertex, and Foundry, and when telemetry or nonessential traffic is disabled; long foreground sleeps are now blocked there too

•[Cloud sessions] Added Claude Code cloud sessions and Remote Control permissions to Enterprise custom roles, so Owners can control access to each by role

•[Cloud sessions] Added a Choose file button to load a cloud environment's setup script from a file

Improved6 changes

•Improved auto mode's prompt before the first read outside the working directories: it now says when blocking those reads makes shell commands ask for permission

•Improved memory use of non-interactive sessions (-p, Agent SDK) during compaction when the transcript file is very large

•Improved a mod's Image to draw inside tmux with allow-passthrough and focus-events on, in kitty, Ghostty, and iTerm2 3.5+ with fullscreen rendering, where it showed only its alt text

•Linux: Improved /sandbox and the sandbox startup warning to name Ubuntu's AppArmor restriction on user namespaces, and how to lift it, when it keeps bubblewrap from starting the sandbox

•[Cloud sessions] Improved the session start checklist to show a cloud environment's setup script output in a scrolling box

•[Code Review] Improved the Code Review admin section to retry the first load and show one Try again banner when it still fails

Fixed14 changes

•Fixed requests failing behind some gateways and compatible servers that reject the effort-2025-11-24 beta value or mid-conversation system messages; Claude Code now retries without them

•Fixed background cleanup deleting some recent files, such as pasted images, when cleanupPeriodDays is set to a very large value

•Fixed compaction after a "Prompt is too long" error keeping too much of a conversation with dense text, such as base64 or SVG, so the next request could fail again

•Fixed file read permission prompts not showing where a symbolic link leads

•Fixed a question's auto-continue timeout firing the moment the external editor closed after a long edit

•Windows: Fixed PreToolUse and PermissionRequest hooks letting a tool call through when Git Bash is missing and the hook's command is only quoted strings, such as a quoted path

•[VSCode] Fixed pressing Enter on the plan review card's "Send feedback and keep planning" button approving the plan instead of sending your comments back

•[VSCode] Fixed the panel showing "Something went wrong" after "Switch branch & continue" on a cloud session opened from Session history's Web tab

•[Cloud sessions] Fixed failed saves and archives in the cloud environment edit dialog showing no error inside the dialog

•[Cloud sessions] Fixed failed routine API token actions showing only a toast; the error now appears in the routine edit dialog

•[Claude Tag] Fixed Claude Tag treating ! commands such as !restart and !help as ordinary messages when sent in bold, italic or strikethrough

•[Claude Tag] Fixed Claude Tag admin channel and workspace pages being replaced by a load error when a background refresh of the bundle list fails

•[Claude Tag] Fixed Claude Tag's spend limits page in admin settings reporting that no channels match a filter while channel names are still loading

•[Code Review] Fixed the Code Review admin section hiding its repositories and switches after a failed refresh of the repository list

Changed3 changes

•Changed the error for an MCP tool call that times out in a non-interactive session while the server's elicitation is unanswered: it now tells Claude that no answer came and not to repeat the call

•[Cloud sessions] Changed turning on Cloud sessions or Remote Control in admin settings to ask for confirmation and list the custom roles that have that permission

•[Cloud sessions] Changed the cloud environment dialog to open network access, setup script and environment variables from rows instead of listing every editor at once

v2.1.310 Claude Code Release Notes

Changes in Claude Code v2.1.310

Added3 changes

Improved6 changes

Fixed14 changes

Changed3 changes

v2.1.310 Claude Code Release Notes

Changes in Claude Code v2.1.310

Added3 changes

Improved6 changes

Fixed14 changes

Changed3 changes