Release notes
Anthropic's official release notes. Claude apps: the website, desktop and phone apps. Claude Code: Claude's coding assistant. Claude API: what developers use to build Claude into their own products.
Claude Code·
Internal fixes.
Claude Code·May 9, 2026
[VSCode] Fixed extension failing to activate on Windows.
Claude Code·May 8, 2026
Added CLAUDE_CODE_ENABLE_FEEDBACK_SURVEY_FOR_OTEL to re-enable the session quality survey for enterprises capturing responses through OpenTelemetry. Added settings.autoMode.hard_deny for auto mode classifier rules that block unconditionally regardless of user intent or allow exceptions.
Claude Code·May 7, 2026
Added worktree.baseRef setting (fresh | head) to choose whether --worktree, EnterWorktree, and agent-isolation worktrees branch from origin/ or local HEAD. Note: the default fresh changes EnterWorktree's base back to origin/ (it has been local HEAD since 2.1.128) — set worktree.baseRef: "head" to keep unpushed commits in new worktrees. Added sandbox.bwrapPath and sandbox.socatPath managed settings (Linux/WSL) to specify custom bubblewrap and socat binary locations.
Claude Code·May 6, 2026
Added CLAUDE_CODE_SESSION_ID environment variable to the Bash tool subprocess environment, matching the session_id passed to hooks. Added CLAUDE_CODE_DISABLE_ALTERNATE_SCREEN=1 env var to opt out of the fullscreen alternate-screen renderer and keep the conversation in the terminal's native scrollback.
Fixed VS Code extension failing to activate on Windows due to a hardcoded build path in the bundled SDK (createRequire polyfill bug). Fixed Mantle endpoint authentication failing with missing x-api-key header.
Added --plugin-url flag to fetch a plugin .zip archive from a URL for the current session. Added CLAUDE_CODE_FORCE_SYNC_OUTPUT=1 env var to force-enable synchronized output on terminals that auto-detection misses (e.g. Emacs eat).
Claude Code·May 4, 2026
Bare /color (no args) now picks a random session color. /mcp now shows the tool count for connected servers and flags servers that connected with 0 tools.
Claude Code·May 1, 2026
The /model picker now lists models from your gateway's /v1/models endpoint when ANTHROPIC_BASE_URL points at an Anthropic-compatible gateway. - Added claude project purge [path] to delete all Claude Code state for a project (transcripts, tasks, file history, config entry) — supports --dry-run, -y/--yes, -i/--interactive, and --all.
Claude Code·Apr 29, 2026
Fixed OAuth authentication failing with a 401 retry loop when CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 is set.
Claude Code·Apr 28, 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. OpenTelemetry: added claude_code.at_mention log event for @-mention resolution.
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.
Claude Code·Apr 23, 2026
Added prUrlTemplate setting to point the footer PR badge at a custom code-review URL instead of github.com. Added CLAUDE_CODE_HIDE_CWD environment variable to hide the working directory in the startup logo.
Added vim visual mode (v) and visual-line mode (V) with selection, operators, and visual feedback. Added DISABLE_UPDATES env var to completely block all update paths including manual claude update — stricter than DISABLE_AUTOUPDATER.
Claude Code·Apr 22, 2026
Forked subagents can now be enabled on external builds by setting CLAUDE_CODE_FORK_SUBAGENT=1. Agent frontmatter mcpServers are now loaded for main-thread agent sessions via --agent.
Claude Code·Apr 20, 2026
/resume on large sessions is significantly faster (up to 67% on 40MB+ sessions) and handles sessions with many dead-fork entries more efficiently. Faster MCP startup when multiple stdio servers are configured; resources/templates/list is now deferred to first @-mention.
Claude Code·Apr 18, 2026
Fixed a crash in the permission dialog when an agent teams teammate requested tool permission.
Claude Code·Apr 17, 2026
Added sandbox.network.deniedDomains setting to block specific domains even when a broader allowedDomains wildcard would otherwise permit them.
Claude Code·Apr 16, 2026
Fixed "claude-opus-4-7 is temporarily unavailable" for auto mode.
Added xhigh effort level for Opus 4.7, sitting between high and max. Available via /effort, --effort, and the model picker; other models fall back to high. Added "Auto (match terminal)" theme option that matches your terminal's dark/light mode — select it from /theme.
Claude Code·Apr 15, 2026
Added /tui command and tui setting — run /tui fullscreen to switch to flicker-free rendering in the same conversation. Added push notification tool — Claude can send mobile push notifications when Remote Control and "Push when Claude decides" config are enabled.
Improved the extended-thinking indicator with a rotating progress hint.
Claude Code·Apr 14, 2026
Added ENABLE_PROMPT_CACHING_1H env var to opt into 1-hour prompt cache TTL on API key, Bedrock, Vertex, and Foundry (ENABLE_PROMPT_CACHING_1H_BEDROCK is deprecated but still honored), and FORCE_PROMPT_CACHING_5M to force 5-minute TTL. Added recap feature to provide context when returning to a session, configurable in /config and manually invocable with /recap; force with CLAUDE_CODE_ENABLE_AWAY_SUMMARY if telemetry disabled.
Show thinking hints sooner during long operations.
Claude Code·Apr 13, 2026
Added path parameter to the EnterWorktree tool to switch into an existing worktree of the current repository. Added PreCompact hook support: hooks can now block compaction by exiting with code 2 or returning {"decision":"block"}.
Claude Code·Apr 10, 2026
Added /team-onboarding command to generate a teammate ramp-up guide from your local Claude Code usage. Added OS CA certificate store trust by default, so enterprise TLS proxies work without extra setup (set CLAUDE_CODE_CERT_STORE=bundled to use only bundled CAs).
Claude Code·Apr 9, 2026
Added interactive Google Vertex AI setup wizard accessible from the login screen when selecting "3rd-party platform", guiding you through GCP authentication, project and region configuration, credential verification, and model pinning. Added CLAUDE_CODE_PERFORCE_MODE env var: when set, Edit/Write/NotebookEdit fail on read-only files with a p4 edit hint instead of silently overwriting them.
Claude Code·Apr 8, 2026
Added focus view toggle (Ctrl+O) in NO_FLICKER mode showing prompt, one-line tool summary with edit diffstats, and final response. Added refreshInterval status line setting to re-run the status line command every N seconds.