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Claude Code Updates & Release Notes

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Claude Code von Anthropic

Claude Code 2.1.245

Behebt einen Absturz beim Start unter Linux-Distributionen mit glibc 2.44, etwa Arch Linux, CachyOS und Fedora Rawhide.

  • Fixed a crash on startup on Linux distributions that ship glibc 2.44 (for example Arch Linux, CachyOS and Fedora Rawhide)

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Claude Code von Anthropic

Claude Code 2.1.239

Kostenschätzungen berücksichtigen den 1,1×-Aufschlag für US-only-Inferenz bei Data-Residency-Workspaces, der Fullscreen-Renderer wird auch für Bedrock, Vertex und Foundry angeboten, /claude-api upgrade migriert Python-Projekte von anthropic 0.x auf 1.x und mehrere Fehler bei Bedrock, Proxys und Alpine/musl wurden behoben.

  • Cost estimates (/cost, status line, --max-budget-usd) now include the 1.1× US-only-inference premium for data-residency workspaces
  • Added the one-time fullscreen renderer offer on Bedrock, Vertex, Foundry and other previously excluded setups; new installs there now start in fullscreen
  • Added /claude-api upgrade to migrate Python projects from anthropic 0.x to 1.x, and updated the skill's Python reference for 1.x (timeouts use anthropic.Timeout, not httpx.Timeout)
  • Cloud sessions: plugins synced from claude.ai now show as name@synced, work with claude plugin enable/disable <name>@synced, and never override a same-named plugin you installed
  • Alpine/musl builds: native image paste, clipboard, and audio-capture add-ons now load (musl-built binaries instead of glibc ones refused by the runtime)
  • The usage-limit message shown when your monthly spend limit is already used up now also says when your session or weekly limit resets
  • Fixed Bedrock streaming behind proxies that strip the response Content-Type header, which silently doubled billed API calls by re-running every turn non-streaming
  • Fixed Claude Code hanging at startup behind an HTTPS proxy when using Bedrock with an SSO profile and awsAuthRefresh — the credential pre-check now honors HTTPS_PROXY
  • Fixed a raw crash dump when starting Claude Code from a directory that no longer exists; it now prints a clear message …

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Claude Code von Anthropic

Claude Code 2.1.238

Neue Einstellung keybindingFlavor für Readline-artiges Ctrl+W, headersHelper für Plugin-Marketplaces und neue Optionen für claude self-hosted-runner, dazu Korrekturen bei Speicherwachstum, Output-Styles und Prompt-Vorschlägen.

  • Added a keybindingFlavor setting: set it to "readline" to make Ctrl+W in the prompt delete back to the previous whitespace, as in Bash; the default ("classic") is unchanged
  • Plugin marketplaces: headersHelper on a url marketplace or a catalog entry runs a command that mints HTTP headers (e.g. a short-lived token) for catalog and same-origin archive fetches
  • A catalog entry's headersHelper runs only when you install or update that plugin, after its command is shown; claude plugin install/update ask [y/N] (or pass -y)
  • Added claude self-hosted-runner --defer-shutdown-max-min <minutes>: on SIGTERM, keep serving attached sessions, park what is left after that many minutes, then exit
  • Added claude self-hosted-runner --proxy-authorization-command / --proxy-authorization-file for egress proxies that require a freshly issued Proxy-Authorization header on every connection
  • Fixed unbounded memory growth in long interactive sessions: subagent tool results are now released once they leave the recent display window
  • Fixed custom, project, and plugin output styles drifting back to the default voice mid-session
  • Fixed CLAUDE_CODE_ENABLE_PROMPT_SUGGESTION=true not keeping prompt suggestions on when your account is near, but not over, its usage limit
  • Fixed worktree-isolation Bash refusals telling you to remove a redirect when the command had none …

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Claude Code von Anthropic

Claude Code 2.1.237

Das Prompt-Caching bei LLM-Gateways oder eigener Base-URL wurde repariert, und es gibt den neuen integrierten Output-Style „Concise“, der unter Output style in /config auswählbar ist.

  • Fixed prompt caching for sessions using an LLM gateway or custom base URL
  • Added a built-in "Concise" output style: Claude leads with results and skips preamble and narration, while doing the work just as thoroughly. Select it under Output style in /config.

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Claude Code von Anthropic

Claude Code 2.1.236

Neue Umgebungsvariable ANTHROPIC_DEFAULT_MODEL, notify_when_idle für sessionübergreifendes SendMessage und strengere Sandbox-Leseverbote auf macOS, außerdem mehrere Fehlerbehebungen bei Renderer, /model-Auswahl und Subprozessen.

  • Added ANTHROPIC_DEFAULT_MODEL environment variable: sets the model new sessions start on, while a /model pick still overrides it and persists across restarts (unlike ANTHROPIC_MODEL)
  • Added notify_when_idle to cross-session SendMessage: ask another Claude Code session on this machine to send one notice when it next goes idle — opt-in, one-shot, no polling (macOS and Linux)
  • Sandbox: on macOS, wildcard read-deny rules (e.g. **/.env) now take precedence inside allowed read regions, cover matched directories' contents, and can't be bypassed by renaming the denied file
  • Fixed clipboard copy, background housekeeping, background sessions, and local MCP logs breaking after the directory a session had switched into was removed (since 2.1.229)
  • Fixed the fullscreen renderer failing permanently after a single failed start: it now falls back to the classic renderer instead of exiting on every subsequent launch
  • Fixed the /model picker rendering taller than the terminal: it now shows only as many models as fit the window, with the rest reachable by scrolling
  • Fixed SendMessage calls being rejected when a malformed closing tag left the message text inside the summary field
  • Fixed unhandled promise rejections when a subprocess fails to start, for example powershell.exe on WSL with Windows interop disabled (regression in 2.1.234)
  • Fixed fullscreen mode sometimes not showing a newly sent message until the next update after the terminal was resized …

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Claude Code von Anthropic

Claude Code 2.1.235

Eine optionale spellcheck-Einstellung unterstreicht falsch geschriebene Wörter im Prompt, zudem wurden Fehler bei Prompt-Cache, Markdown-Listen, Hervorhebungen und Berechtigungsdialogen behoben.

  • Added an optional spellcheck setting that underlines misspelled words in the prompt input as you type, using your installed aspell, hunspell, or ispell
  • Fixed whole-prompt-cache invalidation when a language server disconnected or reconnected mid-session
  • Fixed nested markdown list items misaligning at depth 3+ and added a hanging indent to wrapped list items in the terminal UI
  • Fixed prompt input highlights (slash commands, keywords, mentions) appearing shifted by one or more characters in some multi-line prompts
  • Fixed Shift+Tab inside the permission prompt's comment field approving the edit and granting session-wide edit permission instead of closing the field
  • Fixed the Agent tool advertising a general-purpose default in sessions where that agent is unavailable: an omitted subagent_type there now gets a clear error listing the available agents
  • Fixed notebook cell delete/replace approval dialogs silently omitting the existing cell content when the notebook or cell could not be read; the dialog now says why
  • Fixed slash commands run while Claude is responding showing HTML entities instead of the actual characters
  • Fixed the prompt footer not showing the "Update installed" restart notice after a background auto-update
  • Fixed the expanded task list (ctrl+t) always starting collapsed when resuming or relaunching into a session that still has open tasks …

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Claude Code von Anthropic

Claude Code 2.1.234

Neu sind CLAUDE_CODE_PROJECT_DIR_NAME, die Keybinding-Aktion selection:clear, ein GitLab-Merge-Request-Badge und automatisches Fortsetzen nach Zurücksetzen des Usage-Limits, dazu Sicherheitshärtung gegen Windows-NT-Namespace-Pfade und weitere Fixes.

  • Added the optional CLAUDE_CODE_PROJECT_DIR_NAME environment variable: hosts that give each session its own config directory can choose a short name for the per-project transcript directory
  • Added the selection:clear keybinding action, so a key can be bound to clear an in-app text selection; also works in the agents view
  • Added a GitLab merge request badge to the footer and statusline: repos with a GitLab remote and an authenticated glab CLI show MR !N with draft/pending/green states
  • Claude Code now continues your session automatically when a claude.ai usage limit resets; turn it off in /config ("Continue automatically at usage limit")
  • Claude is now told to use your account email only to identify you, and not to send it to unrelated services unless you ask
  • Security: remote file reads, session restore, CLAUDE.md includes, workflow scripts and file uploads now reject Windows NT-namespace (\??\) paths, hardening the remaining pre-approval file accesses against the NTLM credential-leak vector
  • Fixed auto mode in very long sessions repeatedly re-checking and denying sandboxed commands' network access after the conversation had been compacted
  • Fixed session-scoped permission answers (including denies) being dropped when answering background subagent tool permission prompts …

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Claude Code von Anthropic

Claude Code 2.1.233

Unterstützung für GitLab-Merge-Request-URLs bei --worktree und claude agents, neue Optionen wie forward_user_identity, CLAUDE_CODE_TOOL_MEMORY_LIMIT und CLAUDE_CODE_WEBFETCH_CACHE_TTL_MS sowie mehrere Fehlerbehebungen bei Cloud-Sessions, MCP, Hooks und Skills.

  • Added GitLab merge request URL support to the --worktree flag and the claude agents view (where MRs display as !N)
  • Added an opt-in forward_user_identity apps gateway setting on Anthropic upstreams that sends the signed-in user's identity as headers, so a proxy behind the gateway can attribute spend per user
  • Added opt-in memory cgroup support for Bash tool commands on Linux (CLAUDE_CODE_TOOL_MEMORY_LIMIT) so a runaway build can't stall the session
  • Added CLAUDE_CODE_WEBFETCH_CACHE_TTL_MS environment variable to configure the WebFetch session URL cache TTL (default unchanged: 15 minutes)
  • Fixed cloud sessions occasionally being marked as lost when the environment shut down while Claude was waiting on a permission prompt
  • Fixed MCP v2 connections endlessly reopening the subscriptions/listen stream against servers that terminate long-held streams on a fixed timeout (e.g. serverless hosts)
  • Fixed Notification hooks not firing for permission prompts when running under Claude Desktop or VS Code
  • Fixed idle sessions on Linux sometimes keeping one CPU core at 100% when sandboxing is enabled
  • Fixed bundled skill aliases like /checkup and /review reporting "Unknown command" in -p mode or with plugins/MCP loaded when a user or project skill shadows the bundled skill
  • Fixed skill/command argument substitution to prevent argument values from being re-expanded as template markers …

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Claude Code von Anthropic

Claude Code 2.1.232

Subagent-Forking ist standardmäßig aktiv, andere Claude-Sessions lassen sich per @ erwähnen, Sessionnamen sind pro Rechner eindeutig, und es gibt GitLab-Unterstützung für Plugin-Marketplaces sowie erweitertes Secret-Redaction.

  • Subagent forking is now on by default: a subagent_type: "fork" subagent inherits the full conversation and prompt cache, and non-teammate agent spawns in interactive sessions now run in the background by default
  • Type @ in the prompt to mention another Claude session by name; Claude then uses SendMessage to reach that session directly
  • SendMessage now delivers to a bare name that exactly matches one live session, instead of asking to confirm with a ref first
  • Interactive sessions on one machine now keep unique names: starting or renaming a session to a name another live session already uses gives it a name-word-word variant and tells you
  • Added /config rows for "Dialog expiry" and "Messages from your other sessions" (cross-session inbound accept/hold/refuse)
  • Added secret redaction for GitLab token families (glrt-, gloas-, glptt-, glagent-, glimt-, glsoat-, glcbt-, glft-, glffct-) and full redaction of routable glpat-/gldt- tokens; the glab CLI config store gets the same sandbox and credential-path protection as gh
  • Added GitLab support to plugin marketplaces: bare gitlab.com repo URLs (including nested subgroups) now clone like github.com URLs, and clone auth-failure hints name your actual git host
  • Settings: additionalMarketplaces and allowedMarketplaces are now accepted as friendlier aliases for extraKnownMarketplaces and strictKnownMarketplaces …

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Claude Code von Anthropic

Claude Code 2.1.231

Behoben wurde ein MCP-OAuth-Anmeldefehler mit Redirect-URI-Mismatch bei Servern mit vorregistriertem OAuth-Client wie Slack.

  • Fixed MCP OAuth sign-in failing with a redirect URI mismatch for servers that use a pre-registered OAuth client, such as Slack

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Claude Code von Anthropic

Claude Code 2.1.229

Neu sind SSE-Keepalive-Pings für Gateway-Streaming, Plugin-Marketplace-command-Quellen und Hook-Unterstützung für Self-hosted-Runner, zudem wurden mehrere Abstürze und Darstellungsfehler behoben.

  • Documented claude remote-control --continue for resuming the most recent Remote Control session
  • Added server-supplied Claude Code hook support for self-hosted runner sessions, matching managed-environment behavior
  • Added SSE keepalive pings to gateway streaming responses during long thinking pauses, preventing idle-timeout disconnects on Vertex and Bedrock upstreams
  • Added plugin marketplace command sources: a local command (e.g. an IDE) prints the plugin directory, which is re-resolved each session and applied without a restart; mode: "link" uses it in place
  • ListAgents now marks disconnected Remote Control sessions as offline and labels your cloud sessions as cloud
  • Fixed long responses partly disappearing while streaming and being printed twice in the terminal
  • Fixed a crash to the error screen (including on --resume of the affected session) when a tool call had a non-string glob, file_path, or command value
  • Fixed a RangeError crash when a progress bar or markdown table rendered in a very narrow terminal window (could also crash claude --continue/--resume at startup)
  • Fixed a crash on Windows when a tool call or message referenced a file by an extended-length (\\?\) or UNC path
  • Fixed auto mode failing on every tool call for users who disable the attribution header via CLAUDE_CODE_ATTRIBUTION_HEADER (direct Anthropic API connections) …

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Claude Code von Anthropic

Claude Code 2.1.228

Behoben wurden unter anderem ein Redraw-Stillstand, nicht gefundenes Git unter Windows, /tui mit falschem Modell sowie mehrere Fehler bei Self-hosted-Runnern, Session-Cleanup und Plugin-Cache.

  • Fixed interactive sessions that could stop redrawing entirely, while the process kept running, after a rare internal layout error
  • Fixed git / Git Bash not being found on Windows when Claude Code is launched from a parent folder of the git installation
  • Fixed /tui reverting the session to an earlier model when /model had been changed since the last response
  • Fixed cross-session messaging sometimes starting without an inbox in the first session after install or upgrade
  • Fixed Remote Control /resume while connected leaking the resumed conversation's title or history into the connected session
  • Fixed claude self-hosted-runner sessions failing on every fresh runner when the checkout hook fails for a repository the session doesn't push to; that repository is now skipped with a warning
  • Fixed self-hosted runners ending sessions in the gap between a background task finishing and the follow-up turn starting
  • Fixed session cleanup deleting contents inside a project's memory folder
  • Fixed background plugin-cache cleanup deleting a plugin's cache when its only version is a symlinked development checkout
  • Fixed a settings-merge issue where a marketplace entry redefined in a higher-precedence settings tier could inherit another tier's custom headers; marketplace entries now merge as whole entries
  • Fixed the deferred-tools reminder occasionally being sent to the model twice after a skill invocation …

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Claude Code von Anthropic

Claude Code 2.1.227

Fehlerbehebungen bei Feature-Flags mit abgelaufenem Login-Token, Bash unter claude-code-action und /tui, außerdem ein verbessertes Slash-Command-Menü und weniger Event-Loop-Blockaden.

  • Fixed feature flags being evaluated without the user's subscription tier when a session started with an expired login token, which could wrongly prompt Max plan users to enable usage credits for Fable
  • Fixed every Bash command failing under claude-code-action with allowed_non_write_users on GitHub-hosted runners
  • Fixed /tui bringing back a conversation that had been rewound to before its first message
  • Improved slash-command menu: blue now marks only the selected row, matched characters are bolded instead of recolored, and emoji or accented names keep their glyphs
  • Improved performance: fewer event-loop stalls on file-not-found suggestions and at-mention size checks

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Claude Code von Anthropic

Claude Code 2.1.225

Die Usage-Warnung unterstützt Gateway-Spend-Limits und claude agents zeigt eine Workspace-Trust-Abfrage, außerdem wurden Fehler bei OAuth-Tokens, MCP-OAuth auf macOS, Auto-Modus und Self-hosted-Runnern behoben.

  • Added gateway spend-limit support to Claude Code's usage warning; the limit-reached message now names the cap, its reset time, and the operator's message (requires the gateway on 2.1.225)
  • Added a workspace trust prompt to claude agents for untrusted directories, matching the behavior of claude
  • Fixed a transient 401 replacing a long-lived CLAUDE_CODE_OAUTH_TOKEN with a stored login's short-lived token, breaking headless sessions until restart
  • Fixed MCP OAuth servers on macOS intermittently failing with a burst of 401 errors, as if never authenticated, after a keychain read timed out
  • Fixed auto mode counting a safety-filter refusal of its own permission check toward the consecutive-block limit; the action is still denied, but the model is now told to move on rather than retry
  • Fixed cross-session messages staying parked without a notice or expiry in headless sessions and during startup
  • Fixed conversation history breaking on Remote Control session resume after very large conversations were compacted
  • Fixed hovering over a session in another project in the agents list changing the directory the next agent starts in
  • Fixed claude self-hosted-runner registering and then failing every session when --base-dir cannot be created or written; it now exits at startup with a clear error
  • Fixed Claude Code on the web sessions being misreported as stuck, re-sending a growing event backlog on every reconnect …

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Claude Code von Anthropic

Claude Code 2.1.224

Neu sind Self-hosted-Umgebungen über claude self-hosted-runner, archive-Plugin-Quellen, sessionübergreifendes SendMessage mit ListAgents, ANTHROPIC_BEDROCK_REGION_PREFIX und erweiterte Sandbox-Credential-Masking-Optionen.

  • Added self-hosted environments: claude self-hosted-runner turns your own machines or containers into a place Claude Code web, mobile, and desktop sessions can run, on Team and Enterprise plans
  • Added archive plugin source: install plugins from a zip over HTTPS without git or npm, with optional SHA-256 pinning
  • Added a cancel-and-confirm step when removing an unavailable paste changes a command's text
  • Added ANTHROPIC_BEDROCK_REGION_PREFIX env var for Bedrock to prefer a specific cross-region inference profile over the AWS_REGION-derived one
  • Added crossSessionInbound and dialogExpiry settings: cross-session messages sent to a session running with bypassed permissions are held for your approval, and messages to other sessions auto-deliver
  • Added sandbox credential-masking options: extract and onExtractNoMatch for structured env values, decode: "jwt" with maskClaims for JWT-aware masking, and awsPairs/sigv4 for AWS SigV4 re-signing; these need network.tlsTerminate and are honored only from user, managed, or --settings settings
  • Added cross-session SendMessage: Claude Code sessions can now message each other, on any of your machines, with ListAgents to discover them (macOS and Linux)
  • Fixed long (>200 char) project paths resolving to another project's session directory under a shared sanitized prefix; session list, rename, fork, delete and /resume no longer cross projects …

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Claude Code von Anthropic

Claude Code 2.1.223

Owner-Wildcards für Marketplace-Einstellungen, neue Warnungen bei eingeschränkten Subagent-Modellen und ein /teleport-Hinweis in Cloud-Sessions, dazu mehrere Sicherheitsfixes bei Bash-Berechtigungen und Workflow-Sandbox.

  • Added owner wildcard entries ("owner/*") to the strictKnownMarketplaces and blockedMarketplaces managed settings for allowing or blocking all marketplace repos under a GitHub org
  • Added a warning when workflow agents, forked skills, slash commands, or resumed background agents' requested subagent model is restricted and the parent model runs instead
  • Added a /teleport hint in cloud sessions showing how to continue locally with claude --teleport <session id>
  • Fixed a Bash permission bypass where a crafted command could hide parts of itself from permission checks
  • Fixed permission prompts so commands padded with tabs or invisible Unicode can no longer hide part of the command from the approval dialog
  • Fixed workflow scripts being able to use dynamic import() to run code outside the workflow sandbox
  • Fixed a permission gap where an agent definition's bypassPermissions mode ignored the org bypass-permissions disable policy
  • Fixed resuming a session after a mid-session /cd coming back empty
  • Fixed gateway model discovery hiding Claude models registered under provider-prefixed IDs such as vertex_ai/claude-* or bedrock/anthropic.claude-*
  • Fixed modelOverrides keys that aren't Anthropic model IDs being treated as the session's canonical model ID; unknown keys are now ignored as documented …

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Claude Code von Anthropic

Claude Code 2.1.222

Worktree-isolierte Sessions können keine destruktiven Git-Befehle mehr gegen den Haupt-Checkout ausführen, und zahlreiche weitere Fehler bei Hooks, /usage, Proxy-Konnektivität und Gateways wurden behoben.

  • Fixed worktree-isolated sessions and their subagents being able to run destructive git commands against the main checkout; isolation now applies to file edits and Bash in every session type
  • Fixed PreToolUse auto-allow hooks bypassing tool restrictions in background agent tasks (summaries, compaction, renames)
  • Fixed /usage-credits on Team and Enterprise showing "you've already sent a usage credit request" for members whose earlier request was dismissed, blocking them from sending a new one
  • Fixed the startup connectivity check hanging and then failing behind an HTTPS proxy; it now uses the same proxy-aware transport as API requests and times out with a clear message
  • Fixed "Connection closed mid-response" errors being reported on responses that had actually completed
  • Fixed /usage overattributing usage to MCP servers: a server's share now reflects only the requests that actually consumed its tool results, instead of every turn after any call to it
  • Fixed sessions not linking to pull requests created after the branch was pushed, including through the GitHub REST API
  • Fixed org-restricted model: opus-style subagent and teammate family aliases dropping to the parent model instead of stepping down to the newest org-allowed model in the family
  • Fixed stream idle timeout firing on custom ANTHROPIC_BASE_URL gateways despite server keep-alive pings arriving on the wire …

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