Claude Code changelog

claude-code v2.1.260

Thu, 03 Sep 2026 23:48:12 +0000

What's changed 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 , /advisor off ) for the desktop app, Remote Control, and other headless ( -p /Agent SDK) sessions Added…

claude-code v2.1.259

Wed, 02 Sep 2026 22:33:51 +0000

What's changed Added managedMcpServers managed setting: organizations can provide HTTP/SSE MCP servers to every user (same entry shape as .mcp.json ); entries that name a command to run are skipped Added --permission-prompts none for unattended headless hosts: anything that would prompt is denied automatically while the active permission mode (including auto mode) keeps deciding Added recognition of glab mr create/merge/close/reopen/note/update so GitLab merge requests show as MR !N in the collapsed tool summary and refresh the footer MR badge Added --json to claude plugin validate for a…

claude-code v2.1.258

Tue, 01 Sep 2026 22:33:20 +0000

What's changed Fixed Claude Code failing to launch on macOS 12 (Monterey), a regression introduced in 2.1.255 Fixed remote and scheduled sessions failing with "user messages must have non-empty content" after a re-sent permission approval could not be applied

claude-code v2.1.257

Tue, 01 Sep 2026 17:53:52 +0000

What's changed Added Claude Fable 5.1 ( claude-fable-5-1 ), now the default Fable model — 1M context, $10/$50 per Mtok with $0.25/Mtok cache reads Added "Time format" ( timeFormat ) and timeZone settings: 12-hour, 24-hour, 24-hour UTC, or a strftime pattern for the turn-end clock and transcript-view timestamps Added a Containment Escape rule to auto mode so cloud metadata-credential fetches, egress evasion, and cross-tenant reach are no longer auto-approved unless your environment marks them expected Added CLAUDE_CODE_SUBAGENT_MODEL_FORCE to apply CLAUDE_CODE_SUBAGENT_MODEL (or the main…

claude-code v2.1.252

Mon, 31 Aug 2026 19:46:55 +0000

What's changed Fixed Bash commands failing with "task output swap refused (tasks dir moved or linked)" on some Macs Fixed "always allow" not saving in a project that has no .claude/settings.local.json yet Fixed Remote Control sessions hosted by Claude Desktop or VS Code stalling for minutes after a tool finished when the connection to claude.ai was degraded Fixed background task notifications with very large failure output (for example git errors on a full disk) making the conversation exceed the API request size limit

claude-code v2.1.251

Fri, 28 Aug 2026 18:19:32 +0000

What's changed Added PreModelSwitch and PostModelSwitch hook events (block, confirm, or annotate a model switch); SessionStart resume hooks now receive session staleness and the estimated re-cache cost Added live streaming of a foreground subagent's tool calls and results to Remote Control clients (background subagents, the default, still show status only) Added a Spend limit bar to /usage and a rate_limits.spend_limit status line field for developers behind a Claude apps gateway with spend limits Added a per-session prompt-cache line to /cost (hit ratio, misses, tokens re-cached, warm/cold)…

claude-code v2.1.250

Fri, 28 Aug 2026 00:49:16 +0000

What's changed Bug fixes and reliability improvements

claude-code v2.1.248

Thu, 27 Aug 2026 22:12:20 +0000

What's changed Added --restricted (or CLAUDE_CODE_RESTRICTED=1 ): removes the built-in tools that run commands or code and WebFetch (unless named in --tools ), keeps file tools inside the working directory, refuses bypassPermissions , and ignores user, project and local settings files Added experimental.cacheTtl ( "5m" or "1h" ) to agent frontmatter: a per-agent prompt cache TTL used when no subagent TTL setting is configured Added claude self-hosted-runner --client-label (or SELF_HOSTED_RUNNER_CLIENT_LABEL ) to override the label the runner registers with (default: hostname) Added…

claude-code v2.1.247

Wed, 26 Aug 2026 23:06:39 +0000

What's changed Added the SendFeedback tool: when something goes wrong in a session, Claude can draft a feedback report for you to review and send from /feedback (turn off with the feedbackDrafts setting) Added {id, text, cooldownSessions, priority} entries, tipsFile , and label to spinnerTipsOverride , so organizations can rotate their own tips alongside the built-in ones Added a tip on Bash permission prompts pointing to auto mode, with a one-keystroke "Yes, and switch to auto mode" option Added /claude-api cost-optimize to profile an existing project's Claude API spend and work through cost…

claude-code v2.1.246

Tue, 25 Aug 2026 22:31:52 +0000

What's changed Added a startup warning for Bash allow rules with a wildcard before the subcommand (e.g. Bash(git * main) ), since they also match options inserted before the subcommand Added an Auto mode tab to /permissions for viewing and editing auto mode classifier rules Added the turn's completion time to the end-of-turn duration line, e.g. ✻ Sautéed for 23s · done 6:05 PM Fixed fullscreen mode showing a blank transcript after resizing the terminal and jumping to the bottom until the next keypress Fixed a severe transcript slowdown when a diff contained a very long single line (e.g. a…