← Claude Code changelog

Claude Code 2.1.260

This release introduces a new diff panel, displaying uncommitted changes live as edits are made; this can be toggled in fullscreen mode with /diff. The /cost command now provides insights into prompt-cache misses, helping users understand and optimize model interactions. Extensive fixes address critical issues across permissions, ensuring the sandbox behaves as expected, and resolve various model-specific behaviors, particularly for Fable models. Additionally, improvements in UI responsiveness, enterprise integrations, and agent performance provide a more stable and powerful experience for all users.

Added

  • Added a diff panel that opens beside the conversation in fullscreen mode and shows your uncommitted changes as Claude edits; toggle it with `/diff`
  • Added a likely cause for prompt-cache misses (e.g. tool definitions or system prompt changed, idle past the TTL) to `/cost` and the status line's `prompt_cache` field
  • Added `/reload-plugins` to headless sessions, so it appears in the Claude Code Desktop and SDK command lists
  • Added a text form of `/advisor` (`/advisor`, `/advisor <model>`, `/advisor off`) for the desktop app, Remote Control, and other headless (`-p`/Agent SDK) sessions
  • Added `oidc.scope_on_refresh` to the Claude apps gateway for IdPs that return an id_token on refresh only when asked for `openid` again
  • Added Claude apps gateway support for newer Claude Desktop keys in `desktop` policy blocks, including `userPluginMarketplacesEnabled` and `userPluginUploadsEnabled`
  • Added the selected effort level to the footer model pill, fixed a stale effort level after switching models, and returned the footer pills to their earlier compact size
  • Added Open and Closed to the session list's status filter menu

Improved

  • Improved structured output: Workflow `agent({schema})` rejects a JSON Schema that can never be satisfied up front, and retry-cap errors now include the last validation failure
  • Improved deleting a background session whose worktree has unpushed commits: the message now names the branch and commit count, and deleting again discards the worktree
  • Improved the Claude apps gateway's refresh-failure log to name the step that failed
  • Improved idle CPU usage of non-interactive (`-p` / SDK) sessions
  • Improved the Claude apps gateway on Amazon Bedrock: input tokens for an aborted request are now counted with AWS's free CountTokens API (grant `bedrock:CountTokens`) instead of a one-token request
  • Improved the settings error for rules such as `Edit(C:\dir\(name)\**)`, where `\(` is read as an escaped parenthesis rather than a path separator, to suggest an unambiguous spelling
  • Improved auto-compact for 1M-context models: Opus and Fable sessions now compact shortly before the 1M-token limit, and recovery compaction on very large contexts no longer times out at 10 minutes
  • Improved `/ultrareview` and `claude ultrareview` to wait up to 45 minutes (previously 30) for long-running cloud reviews
  • Improved `/effort` on Claude Fable 5.1 so changing effort mid-session no longer invalidates the prompt cache

Changed

  • Reverted the 2.1.259 change applying `Read()` deny rules to Bash arguments; it denied `npm run build` under a `Read(./**/build/**)` rule in every mode and made `cd … && grep` prompt even in auto mode
  • Updated the bundled `claude-api` skill so its Go, Java, and C# samples use current-generation model IDs, and clarified that cheaper worker or sub-agent models should be current-generation too
  • Changed `ctrl+l` / `cmd+k` in fullscreen mode to clear the transcript view like a terminal `clear`; scroll up to see earlier messages
  • Changed permission rules with text after the closing parenthesis (e.g. `Bash(ls) x`), which never matched anything, to be reported as invalid settings instead of being silently ignored
  • Changed server-managed settings so a managed CLAUDE.md (`claudeMd`) no longer triggers the security approval dialog; hooks, shell-command, sandbox, and unsafe `env` settings still require approval
  • Changed Claude in Chrome to follow your organization's Claude in Chrome admin setting; when an admin turns it off, `--chrome`, `/chrome` and the browser tools are unavailable
  • Changed Claude apps gateway to send `orgPluginSettings` in the list form read by Claude Desktop 1.15200.0 and later; older desktops ignore it
  • Changed Claude apps gateway to also refuse to start, naming the field, when a `desktop` policy misspells a field in a nested object of a `managedMcpServers` or `orgPluginSettings` entry
  • Changed commands typed at the `!` bash-mode prompt to run outside the sandbox even when strict sandbox mode (`sandbox.allowUnsandboxedCommands: false`) is on, like typing into your own terminal
  • Changed self-hosted runner `--kill-session-after-min` to release a session that is only waiting on its user (paused, resumable on the next message) instead of killing it and reporting a failure

Fixed

  • Fixed `Edit`/`Write`/`Read` permission rules whose path contains parentheses being dropped as invalid or ignored by the Bash sandbox, which left "read-only" folders writable
  • Fixed one file permission rule with an uncompilable pattern (e.g. an unclosed `[`) making every file edit fail with `Invalid regular expression`; such a deny rule now guards the literal path it spells
  • Fixed Bash permission checks auto-approving zsh commands that hide a command substitution in a REPORTTIME, REPORTMEMORY or DIRSTACKSIZE assignment; these now prompt for approval
  • Fixed Bedrock model discovery, token counting and AWS SSO/STS credential calls failing with "unable to get local issuer certificate" when the corporate root CA is only in the OS certificate store
  • Fixed `permissions.blockReadsOutsideWorkingDirectories` on macOS hiding the user's git config from sandboxed git and hiding a worktree-isolated sub-agent's own checkout
  • Fixed managed settings not loading for claude.ai Enterprise/Team users who also had a leftover API key from an earlier `/login`
  • Fixed `/status` listing a signed-in claude.ai account and a configured API key as if both were in effect; the credential not in use is now marked
  • Fixed managed `skillOverrides` entries keyed on a bundled skill's alias (e.g. `checkup` for `/doctor`) not applying, and `Skill(name)` deny rules not covering a nested skill listed as `<dir>:name`
  • Fixed `model: fable` agents ignoring the `[1m]` tag on an `ANTHROPIC_DEFAULT_FABLE_MODEL` pin and silently running with a 200K context window
  • Fixed the `/model` picker not showing Fable 5.1 for organizations that can use it, which was only accepted when typed as `/model claude-fable-5-1`
  • Fixed prompt caching on Claude Fable 5.1 not covering the context attached after tool results, so it was re-sent as uncached input on every tool-call turn
  • Fixed model switching staying blocked for the rest of the session after a plugin hook load failure; each switch now re-checks and the refusal names the cause
  • Fixed model switching being blocked for the session when an organization-managed plugin's marketplace could not be loaded
  • Fixed SDK-provided MCP servers (e.g. Desktop connectors) sometimes missing from the first turn and only appearing on the next one
  • Fixed Claude in Chrome tools failing with "Not connected" mid-task in cloud-hosted claude.ai sessions when a connector was added or removed
  • Fixed flags, joined emoji and accented letters splitting across wrapped lines, and stale text staying on screen when a flag or joined emoji falls in the terminal's last two columns (now shown as `…`)
  • Fixed Remote Control accepting a model pick that is not a valid model name; it is now refused with an error instead of failing on the next message
  • Fixed `/rewind` and `--rewind-files` reporting success when checkpoint backup files were missing and nothing was actually restored
  • Fixed `/rewind` leaving stale file-read tracking from the rewound-away turns, which caused "File unchanged since last read" stubs and full-file re-injection after external edits
  • Fixed `-p --resume`/`--continue` (as used by the desktop app) failing on every retry once a session's worktree directory lost its git metadata; it now fails once, then resumes without the worktree
  • Fixed a subagent that resumed another agent via SendMessage never being woken by that agent's completion (the notification went to the main conversation instead)
  • Fixed agent teams: an in-process teammate's transcript losing messages, or going blank, during long API retry waits (e.g. under `CLAUDE_CODE_RETRY_WATCHDOG`) as retry notices evicted real messages
  • Fixed a session that moved to the background appearing twice in ListAgents (once as a phantom "interactive" twin with the same name) and receiving SendMessage deliveries in the viewer
  • Fixed intermittent "task output swap refused" errors when many sessions share a project directory
  • Fixed Ctrl+Z in fullscreen leaving the shell on the alternate screen, drawn over the paused interface
  • Fixed Workflow tool subagents being restarted as stalled while a long context compaction was still in progress
  • Fixed plugins from a URL marketplace failing to install with "marketplace entry path does not stay inside the marketplace directory" when a host app (e.g. Claude Desktop) stores it as a directory
  • Fixed an extra browser tab opening when an artifact is published in a session you're driving from claude.ai, the desktop app, or mobile (Remote Control)
  • Fixed the Artifact tool's first call failing with an "Invalid tool parameters" validation error in some Cowork sessions
  • Fixed IDE line selections being dropped when running a skill or slash command (the "N lines selected" context now reaches Claude)
  • Fixed repository detection for GitLab projects in nested subgroups (e.g. `gitlab.com/group/subgroup/project`)
  • Fixed `owner/repo#123` issue references in rendered output linking to github.com when working in a GitLab repository; they now link to the gitlab.com issue
  • Glob/Grep: Fixed the search path being probed on disk before the permission check; a missing path is now reported after permission is decided, as Read does
  • Fixed the welcome screen disappearing in a new session when Remote Control turns on automatically
  • Fixed the session history picker loading a session a second time when it is already open in another tab; it now switches to that tab
  • Fixed the session tab's Rename command silently doing nothing while the tab's view was reloading; it now always applies
  • Fixed a half-finished message, an empty tool card or an extra "Thought for" line staying on screen after Claude Code retried a dropped response
  • Fixed "Enable Remote Control for all sessions" not applying to a session tab that was still starting when the toggle was flipped

Removed

  • Removed the one-hour time limit on background commands started by subagents; they now run until they exit or are stopped, matching the main session
Claude Code 2.1.260 — Release Notes