• alwaysLoad MCP server config skips tool-search deferral entirely. Set "alwaysLoad": true on any server to keep all its tools loaded at startup instead of waiting for ToolSearch discovery (more below).

• PostToolUse hooks can now replace tool output for all tools, not just MCP. Use hookSpecificOutput.updatedToolOutput in any PostToolUse hook to transform output from built-in tools like Bash, Read, and Write (more below).

• claude ultrareview [target] runs code review non-interactively from CI. Prints findings to stdout (--json for structured output), exits 0 on success or 1 on failure.

• OAuth 401 retry loop fixed when CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 is set. If you had this env var and auth was looping on 401s, upgrade to 2.1.123.

• Three memory leaks fixed: multi-GB RSS from image-heavy sessions, ~2GB leak in /usage, and unbounded growth from long-running tool progress events. If you've been restarting sessions to recover memory, 2.1.121 has the fixes.

New in 2.1.120, 2.1.121, 2.1.122, 2.1.123

2.1.123 (April 29, 2026)

• Fixed OAuth authentication failing with a 401 retry loop when CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 is set

2.1.122 (April 29, 2026)

• Added ANTHROPIC_BEDROCK_SERVICE_TIER environment variable to select a Bedrock service tier (default, flex, or priority), sent as the X-Amzn-Bedrock-Service-Tier header
• Pasting a PR URL into the /resume search box now finds the session that created that PR (GitHub, GitHub Enterprise, GitLab, and Bitbucket)
• /mcp now shows claude.ai connectors hidden by a manually-added server with the same URL, with a hint to remove the duplicate
• Clarified the /mcp message shown when an MCP server is still unauthorized after the browser sign-in flow
• OpenTelemetry: numeric attributes on api_request/api_error log events are now emitted as numbers, not strings
• OpenTelemetry: added claude_code.at_mention log event for @-mention resolution
• Fixed /branch producing forks that fail with "tool_use ids were found without tool_result blocks" when the source session contained entries from rewound timelines
• Fixed /model not showing the Effort option for Bedrock application inference profile ARNs, and those ARNs not receiving output_config.effort
• Fixed Vertex AI / Bedrock returning invalid_request_error: output_config: Extra inputs are not permitted on session-title generation and other structured-output queries
• Fixed Vertex AI count_tokens endpoint returning 400 errors for users behind proxy gateways
• Fixed spinnerTipsOverride.excludeDefault not suppressing the time-based spinner tips
• Fixed ToolSearch missing MCP tools that connected after session start in nonblocking mode
• Fixed !exit / !quit in bash mode terminating the CLI instead of running as a shell command
• Fixed images sent to newer models being resized to 2576px per side instead of the correct 2000px maximum
• Fixed remote control session idle status redrawing twice per second, which could flood tmux -CC control pipes and pause the terminal
• Fixed assistant messages appearing blank in some sessions due to a stale view preference
• Fixed a malformed hooks entry in settings.json no longer invalidating the entire file
• Voice mode: keybindings bound to Caps Lock now show an error since terminals don't deliver Caps Lock as a key event

2.1.121 (April 29, 2026)

• Added alwaysLoad option to MCP server config, when true, all tools from that server skip tool-search deferral and are always available
• Added claude plugin prune to remove orphaned auto-installed plugin dependencies; plugin uninstall --prune cascades
• Added a type-to-filter search box to /skills so you can find a skill in long lists without scrolling
• PostToolUse hooks can now replace tool output for all tools via hookSpecificOutput.updatedToolOutput (previously MCP-only)
• Fullscreen mode: typing into the prompt no longer jumps scroll back to the bottom after you've scrolled up to read earlier output
• Dialogs that overflow the terminal are now scrollable with arrow keys, PgUp/PgDn, home/end, and mouse wheel in both fullscreen and non-fullscreen modes
• Clicking any line of a long URL that wraps across rows in fullscreen mode now opens the full URL
• SDK and claude -p: CLAUDE_CODE_FORK_SUBAGENT=1 now works in non-interactive sessions
• --dangerously-skip-permissions no longer prompts for writes to .claude/skills/, .claude/agents/, and .claude/commands/
• /terminal-setup now enables iTerm2's "Applications in terminal may access clipboard" setting so /copy works, including from tmux
• MCP servers that hit a transient error during startup now auto-retry up to 3 times instead of staying disconnected
• The terminal tab session title is now generated in your configured language setting
• Claude.ai connectors with the same upstream URL are now deduplicated instead of appearing as duplicates
• Vertex AI: support X.509 certificate-based Workload Identity Federation (mTLS ADC)
• Faster startup after upgrading: removed the Recent Activity panel from the release-notes splash
• LSP diagnostic summaries now expand on click/ctrl+o and show the expand hint
• SDK: mcp_authenticate now supports redirectUri for custom scheme completion and claude.ai connectors
• OpenTelemetry: added stop_reason, gen_ai.response.finish_reasons, and user_system_prompt (gated behind OTEL_LOG_USER_PROMPTS) to LLM request spans
• [VSCode] Voice dictation now respects the accessibility.voice.speechLanguage setting when no Claude Code language is configured
• [VSCode] /context now opens a native token usage dialog
• Fixed unbounded memory growth (multi-GB RSS) when processing many images in a session
• Fixed /usage leaking up to ~2GB of memory on machines with large transcript histories
• Fixed memory leak when long-running tools fail to emit a clear progress event
• Fixed Bash tool becoming permanently unusable when the directory Claude was started in is deleted or moved mid-session
• Fixed --resume crashing on startup in external builds
• Fixed --resume failing on large sessions when a transcript line was corrupted by an unclean shutdown, the corrupt line is now skipped
• Fixed thinking.type.enabled is not supported error when using Bedrock application inference profile ARNs
• Fixed Microsoft 365 MCP OAuth failing with duplicate or unsupported prompt parameter
• Fixed scrollback duplication when pressing Ctrl+L or triggering a redraw in non-fullscreen mode on tmux, GNOME Terminal, Windows Terminal, and Konsole
• Fixed claude.ai MCP connectors silently disappearing when the connector-list fetch hits a transient auth error at startup
• Fixed "Always allow" rules for built-in tools in remote sessions not surviving worker restarts
• Fixed NO_PROXY not being respected for all HTTP clients when set via managed-settings.json under the native build
• Fixed managed settings approval prompt exiting the session even when accepted, now applies settings and continues
• Fixed /usage returning "rate limited" after a stale OAuth token, now refreshes automatically
• Fixed invalid legacy enum values in settings.json invalidating the entire settings file
• Fixed /usage dialog content being clipped when no-flicker mode is off
• Fixed /focus showing "Unknown command" when the fullscreen renderer is off, now explains how to enable it
• Fixed embedded grep/find/rg shell wrappers failing when the running binary is deleted mid-session, now falls back to installed tools
• Reduced peak file descriptor usage during find in the Bash tool on large directory trees

2.1.120 (April 29, 2026)

• Windows: Git for Windows (Git Bash) is no longer required, when absent, Claude Code uses PowerShell as the shell tool
• Added claude ultrareview [target] subcommand to run /ultrareview non-interactively from CI or scripts, prints findings to stdout (--json for raw output) and exits 0 on completion or 1 on failure
• Skills can now reference the current effort level with ${CLAUDE_EFFORT} in their content
• Set AI_AGENT environment variable for subprocesses so gh can attribute traffic to Claude Code
• Spinner tips that recommend installing the desktop app or creating skills/agents are now hidden when you already have them
• Show a "use PgUp/PgDn to scroll" hint when the terminal sends arrow keys instead of scroll events
• Faster session start when you have many claude.ai connectors configured but not authorized
• The auto mode denial message now links to the configuration docs
• claude plugin validate now accepts $schema, version, and description at the top level of marketplace.json and $schema in plugin.json
• Auto-compact in auto mode now displays auto (lowercase, no token count) instead of a misleading token value
• Fixed pressing Esc during a stdio MCP tool call closing the entire server connection (regression in 2.1.105)
• Fixed /rewind and other interactive overlays not responding to keyboard input after launching with claude --resume
• Fixed terminal scrollback duplication in non-fullscreen mode (resize, dialog dismiss, long sessions)
• Fixed DISABLE_TELEMETRY / CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC not suppressing usage metrics telemetry for API and enterprise users
• Fixed false-positive "Dangerous rm operation" permission prompts in auto mode for multi-line bash commands containing both a pipe and a redirect
• Fixed long selection menus clipping below the terminal in fullscreen mode, the focused option now stays on screen as you scroll
• Fixed Write tool output collapsing instead of expanding when clicking "+N lines" in fullscreen
• Fixed slash command picker jumping while typing, and improved highlight to only match contiguous substrings in blue
• Fixed /plugin marketplace failing to load when one entry uses an unrecognized source format, that entry is shown but installing it prompts you to update
• [VSCode] /usage now opens the native Account & Usage dialog instead of returning plain-text session cost
• [VSCode] Voice dictation now respects the language setting in ~/.claude/settings.json
• Fixed find in the Bash tool exhausting open file descriptors on large directory trees, causing host-wide crashes (macOS/Linux native builds)

Notes