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Claude Code von Anthropic

Version 2.1.173: Fable-5-Namen und Sandbox-Warnung

Fable-5-Modellnamen mit [1m]-Suffix werden automatisch bereinigt, und eine fälschliche Warnung zu fehlenden Sandbox-Abhängigkeiten unter Windows entfällt.

  • Fixed Fable 5 model names with a [1m] suffix not being normalized — Fable 5 includes 1M context by default, so the suffix is now stripped automatically
  • Fixed a spurious "sandbox dependencies missing" startup warning on Windows when sandbox was enabled in settings

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Version 2.1.172: Verschachtelte Sub-Agents und Bedrock-Region

Sub-Agents können nun bis zu fünf Ebenen tief eigene Sub-Agents starten, Bedrock liest die AWS-Region aus ~/.aws, /plugin bietet eine Suche, und es wurden mehrere Fehler bei 1M-Kontext, Bildern und Hintergrund-Agents behoben.

  • Sub-agents can now spawn their own sub-agents (up to 5 levels deep)
  • Amazon Bedrock now reads the AWS region from ~/.aws config files when AWS_REGION isn't set, matching AWS SDK precedence; /status shows where the region came from
  • Added a search bar when browsing a marketplace's plugins in /plugin
  • Added model attribute to the claude_code.lines_of_code.count OTEL metric
  • Fixed sessions using 1M context without usage credits getting permanently stuck — the session now automatically compacts back under the standard context limit
  • Fixed a repeating "an image in the conversation could not be processed and was removed" error when the conversation contained multiple images
  • Fixed the agents view keeping a session under Working with a busy spinner for up to 30 seconds after the worker replied
  • Fixed background agents potentially reading another directory's project settings (.mcp.json approvals, trust) when dispatched onto a pre-warmed worker
  • Fixed background-session attach failing with EAUTH for sessions started on an older version after the daemon auto-updated
  • Fixed a background sub-agent staying stuck as "active" in the agent panel after a nested agent it spawned was stopped
  • Fixed /model suggestions in the claude agents dispatch input rendering with a misleading slash prefix and showing models disabled for your org …

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Version 2.1.170: Claude Fable 5 eingeführt

Claude Fable 5, ein für den allgemeinen Gebrauch abgesichertes Modell der Mythos-Klasse, ist mit Update auf 2.1.170 verfügbar, und das Speichern von Transcripts aus dem VS-Code-Terminal wurde repariert.

  • Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use. Fable’s capabilities exceed those of any model we’ve ever made generally available. Update to version 2.1.170 for access. https://www.anthropic.com/news/claude-fable-5-mythos-5
  • Fixed sessions not saving transcripts (and not appearing in --resume) when launched from the VS Code integrated terminal or any shell that inherited Claude Code environment variables.

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Version 2.1.169: --safe-mode, /cd und Bundled-Skills-Option

Neu sind --safe-mode, der Befehl /cd und die Option disableBundledSkills, außerdem wurden unter anderem die Verlaufsnavigation, die Durchsetzung von MCP-Richtlinien, Remote Control und Windows-Probleme korrigiert.

  • Added --safe-mode flag (and CLAUDE_CODE_SAFE_MODE) to start Claude Code with all customizations (CLAUDE.md, plugins, skills, hooks, MCP servers) disabled for troubleshooting
  • Added /cd command to move a session to a new working directory without breaking the prompt cache mid-session
  • Added a disableBundledSkills setting and CLAUDE_CODE_DISABLE_BUNDLED_SKILLS environment variable to hide bundled skills, workflows, and built-in slash commands from the model
  • Fixed Up/Down arrows jumping to command history past the wrapped rows of a long input line — they now move through each visual row first, and history recall enters at the near edge
  • Fixed enterprise managed MCP policies (allowedMcpServers/deniedMcpServers) not being enforced on reconnect, IDE-typed configs, --mcp-config servers during the first session after install, or before remote settings loaded; also fixed slow cold starts for orgs without remote settings
  • Fixed a ~30-50ms UI stall at the start of each turn for macOS users logged in with claude.ai credentials
  • Fixed claude -p being slow or appearing to hang on Windows while waiting for the slash-command/skill scan (regression in 2.1.161)
  • Fixed Remote Control getting stuck on "reconnecting" after resuming a session when an OAuth token refresh happened at the same time
  • Fixed Git Credential Manager's "Connect to GitHub" popup appearing on Windows at startup when background git commands ran without cached credentials …

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Claude Code 2.1.166: Fallback-Modelle und strengere Cross-Session-Sicherheit

Neu ist die Einstellung fallbackModel mit bis zu drei Ersatzmodellen, außerdem Glob-Muster in Deny-Regeln, abgesicherte Nachrichten zwischen Sessions per SendMessage, ein konsistenteres Abschalten von Thinking sowie mehrere Fehlerbehebungen.

  • Added fallbackModel setting to configure up to three fallback models tried in order when the primary model is overloaded or unavailable; --fallback-model now also applies to interactive sessions
  • Added glob pattern support in deny rule tool-name position ("*" denies all tools); allow rules reject non-MCP globs, and unknown tool names in deny rules warn at startup
  • Hardened cross-session messaging: messages relayed via SendMessage from other Claude sessions no longer carry user authority — receivers refuse relayed permission requests, and auto mode blocks them
  • MAX_THINKING_TOKENS=0, --thinking disabled, and the per-model thinking toggle now disable thinking on models that think by default via the Claude API (3P providers unchanged)
  • Claude Code now retries a turn once on the fallback model when the API rejects an unexpected non-retryable error; auth, rate-limit, request-size, and transport errors still surface immediately
  • claude update now announces the target version before downloading instead of going silent
  • claude agents: typing a URL into the list now filters to the session whose first prompt contained it
  • Fixed a recurring "image could not be processed" error and extra token usage when an unprocessable image was sent in a session
  • Fixed remote sessions becoming permanently stuck when a brief backend disruption occurred during worker registration at startup …

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Claude Code 2.1.163: Versionsvorgaben, /plugin list und Hook-Erweiterungen

Neu sind die Managed Settings requiredMinimumVersion und requiredMaximumVersion, der Befehl /plugin list, ein Kopier-Shortcut in /btw und additionalContext für Stop-Hooks, dazu mehrere Fehlerbehebungen bei claude -p, Bash und Windows.

  • Added requiredMinimumVersion and requiredMaximumVersion managed settings — Claude Code refuses to start if its version is outside the allowed range and directs the user to an approved version
  • Added /plugin list command to list installed plugins, with --enabled/--disabled filters
  • Added a "c to copy" shortcut to /btw that copies the raw markdown answer to the clipboard, preserving formatting when pasted elsewhere
  • Hooks: Stop and SubagentStop hooks can now return hookSpecificOutput.additionalContext to give Claude feedback and keep the turn going without being labeled a hook error
  • Skills: added \$ escape syntax to include a literal $ before a digit in command bodies
  • stdio MCP servers now receive the same CLAUDE_CODE_SESSION_ID as hooks/Bash on --resume
  • Fixed claude -p hanging forever after its final result when a backgrounded command never exits — background shells are now stopped ~5s after the result once stdin closes
  • Fixed claude -p failing with "ANTHROPIC_API_KEY required" on Bedrock/Vertex/Foundry when CI=true and no Anthropic API key is set
  • Fixed bash commands failing under bazel and EDR-protected Go workflows: $TMPDIR was overridden to /tmp/claude-{uid} for all commands instead of only sandboxed ones (regression in 2.1.154)
  • Fixed Bash commands failing on Windows with "EEXIST: file already exists" on the session-env directory when it has the read-only attribute or is inside OneDrive …

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Claude Code 2.1.162: Neuerungen bei agents, /effort und Berechtigungsregeln

Version 2.1.162 ergänzt waitingFor in claude agents --json, bestätigt Einstellungen bei /effort, zeigt Remote Control als Footer-Pill, benennt Windsurf in Devin Desktop um und behebt Fehler bei Start, WebFetch- und Windows-Berechtigungsregeln sowie Interrupts.

  • claude agents --json now includes waitingFor showing what a waiting session is blocked on (e.g. permission prompt)
  • --tools: explicitly listing Grep/Glob now provides the dedicated search tools on native builds with embedded search (previously these names were silently ignored)
  • /effort now confirms when your chosen level will persist as the default for new sessions
  • Clicking a slash command in the autocomplete menu now fills it into your prompt instead of running it immediately; press Enter to run
  • Remote Control now shows as a persistent footer pill (with a link to the session) instead of a startup message
  • Renamed Windsurf to Devin Desktop in the /ide menu, /terminal-setup, and /scroll-speed, following the editor's rebrand
  • Fixed a silent startup hang when the config directory is read-only or unwritable — Claude Code now starts with in-memory config and surfaces startup errors instead of showing a blank screen
  • Fixed WebFetch permission rules not being applied to built-in preapproved domains; explicit WebFetch(domain:...) deny/ask/allow rules now take precedence over the preapproved-host auto-allow
  • Fixed Windows permission rules never matching when spelled with backslashes (~\, \\server\share) or case-variant paths, and Read deny rules not hiding files from Glob/Grep results
  • Fixed an interrupt (Esc) sent at the very start of a turn being silently dropped in stream-json/SDK sessions, leaving the turn running with no "Interrupted" feedback …

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Claude Code 2.1.161: OTEL-Labels, /mcp-Ansicht und Fixes

Version 2.1.161 übernimmt OTEL_RESOURCE_ATTRIBUTES als Labels in Metriken, blendet in /mcp ungenutzte claude.ai-Connectors ein, lässt parallele Tool-Calls bei fehlgeschlagenem Bash-Befehl weiterlaufen und behebt mehrere Fehler.

  • OTEL_RESOURCE_ATTRIBUTES values are now included as labels on metric datapoints, so you can slice usage metrics by custom dimensions like team or repo
  • claude agents rows now show done/total before the detail when work is fanned out; peek shows the longest-running item
  • /mcp now collapses claude.ai connectors you've never signed in to behind a "Show unused connectors" row
  • Parallel tool calls: a failed Bash command no longer cancels other calls in the same batch — each tool returns its own result independently
  • Fullscreen mode: clipboard now uses wl-copy/xclip/xsel on Linux when available, copies to both the clipboard and PRIMARY selection for middle-click paste, and the "hold {key} for native selection" hint now shows the correct key per terminal
  • Fixed the /effort dialog, workflow animations, and prompt keyword shimmer not honoring the "Reduce motion" setting
  • Fixed forceLoginOrgUUID/forceLoginMethod managed-settings policies blocking third-party provider sessions (Bedrock, Vertex, Foundry, Mantle) alongside the org pin (regression in 2.1.146)
  • Fixed background subagent output corrupting claude -p stdout when using --output-format text or json
  • Fixed /usage-credits starting a re-login for Team and Enterprise admins instead of pointing to the organization's usage settings page
  • Fixed /autofix-pr reporting "cannot run on the default branch" when the session is inside a git worktree or another repository …

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Claude Code 2.1.160: Mehr Rückfragen bei sensiblen Dateien, Fixes

Claude Code fragt nun vor dem Schreiben in Shell-Startdateien und ~/.config/git/ sowie im acceptEdits-Modus vor Build-Tool-Konfigurationsdateien nach, grep erfüllt die Read-vor-Edit-Prüfung, und mehrere Fehler bei Hintergrundsessions und WSL wurden behoben.

  • Added a prompt before writing to shell startup files (.zshenv, .zlogin, .bash_login) and ~/.config/git/, which could otherwise lead to unintended command execution
  • acceptEdits mode now prompts before writing build-tool config files that grant code execution (.npmrc, .yarnrc*, bunfig.toml, .bazelrc, .pre-commit-config.yaml, .devcontainer/, etc.)
  • Edit no longer requires a separate Read after viewing a file with grep: single-file grep/egrep/fgrep commands now satisfy the read-before-edit check
  • Fixed copy-on-select not writing to the Windows clipboard on WSL — now uses PowerShell interop instead of OSC 52, which terminals like MobaXterm don't support
  • Fixed restoring a completed session from claude agents dropping chat history and re-running the original prompt
  • Fixed background sessions re-attached after overnight retire losing their conversation and re-running the original prompt
  • Fixed claude --bg occasionally failing with "socket missing" when the background daemon was cold-starting on a loaded machine
  • Fixed an issue on Windows where the directory a background session was started in could not be deleted after claude rm until the background daemon exited
  • Fixed background agents that resumed work being shown under Completed in the agents list
  • Fixed claude agents freezing for several seconds when returning to the session list due to the auto-updater re-checking on every exit …

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Claude Code Version 2.1.159

Version 2.1.159 enthält nur interne Infrastrukturverbesserungen ohne für Nutzer sichtbare Änderungen.

  • Internal infrastructure improvements (no user-facing changes)

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Claude Code 2.1.158: Auto mode auf Bedrock, Vertex und Foundry

Auto mode ist auf Bedrock, Vertex und Foundry für Opus 4.7 und Opus 4.8 verfügbar und wird mit CLAUDE_CODE_ENABLE_AUTO_MODE=1 aktiviert.

  • Auto mode is now available on Bedrock, Vertex, and Foundry for Opus 4.7 and Opus 4.8. Opt in by setting CLAUDE_CODE_ENABLE_AUTO_MODE=1

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Claude Code 2.1.157: Plugins in .claude/skills und neue Plugin-Befehle

Plugins in .claude/skills werden automatisch geladen, claude plugin init <name> erstellt ein Plugin-Grundgerüst, /plugin bekommt Autovervollständigung, und es gibt weitere Verbesserungen bei claude agents, Worktrees und Telemetrie sowie mehrere Fehlerbehebungen.

  • Plugins in .claude/skills directories are now automatically loaded, no marketplace required
  • Added claude plugin init <name> to scaffold a new plugin in .claude/skills
  • Added autocomplete for /plugin arguments: subcommands, installed plugin names, and plugins from known marketplaces
  • claude agents: the agent field in settings.json is now honored for dispatched sessions, with --agent <name> to override it
  • EnterWorktree can now switch between Claude-managed worktrees mid-session
  • tool_decision telemetry events now include tool_parameters (bash commands, MCP/skill names) when OTEL_LOG_TOOL_DETAILS=1
  • Worktrees managed by Claude are now left unlocked when the agent finishes, so git worktree remove/prune can clean them up
  • Fixed unprocessable images (zero-byte, corrupt) attached via paste, MCP, or dialog crashing the request instead of becoming a text placeholder
  • Fixed sandbox network permission prompts appearing in auto and bypass-permissions mode when using the desktop app, IDE extensions, or SDK
  • Fixed claude agents completed sessions not retiring when an idle subagent was still parked or had leaked a backgrounded shell
  • Fixed claude agents pressing Esc not cancelling a slow "opening…", leaving the list unresponsive
  • Fixed background agent worktrees under .claude/worktrees/ being orphaned after the 30-day job retention sweep
  • Fixed background sessions re-attached after a sleep/wake not telling the model the correct date …

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Claude Code 2.1.156: Fix für Thinking-Blöcke bei Opus 4.8

Behoben wurde ein Problem bei Opus 4.8, bei dem veränderte Thinking-Blöcke zu API-Fehlern führten.

  • Fixed an issue when using Opus 4.8 where thinking blocks were modified, leading to API errors.

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Claude Code 2.1.154: Opus 4.8 und dynamische Workflows

Opus 4.8 ist verfügbar und nutzt standardmäßig hohen Effort, dazu kommen dynamische Workflows über /workflows, günstigerer Fast mode, ein schlanker System-Prompt als Standard für die meisten Modelle und mehrere Änderungen an /simplify, /effort und claude agents.

  • Opus 4.8 is here! Now defaults to high effort · /effort xhigh for your hardest tasks
  • Introducing dynamic workflows: ask Claude to create a workflow and it orchestrates work across tens to hundreds of agents in the background, so you can take on larger, more complex tasks. Run /workflows to view your runs
  • Fast mode on Opus 4.8 is now available at a fraction of its previous cost: 2x the standard rate for 2.5x the speed
  • The lean system prompt is now the default for all models except Haiku, Sonnet, and Opus 4.7 and earlier
  • Claude now reserves the multiple-choice question prompt for decisions it genuinely cannot make itself, instead of asking when it already has enough context to proceed
  • /simplify now runs a cleanup-only review (reuse, simplification, efficiency, altitude) and applies the fixes, instead of running the full /code-review --fix bug-hunting review
  • Renamed the /effort slider labels from "Speed"/"Intelligence" to "Faster"/"Smarter" for clarity
  • claude agents: type ! <command> to run a shell command as a background session you can attach to and detach from. Also available as claude --bg --exec '<command>'
  • claude agents: /logout now signs you out instead of being sent to a background session
  • ←← to open the agents view now works on Bedrock, Vertex, Foundry, and with telemetry disabled …

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Claude Code 2.1.153: skipLfs, Update-Hinweise und Fixes

Neu sind die Option skipLfs für Plugin-Marketplace-Quellen, ein Hinweis bei nicht aktualisierbaren npm-Installationen, COLUMNS und LINES für Status-Line-Befehle sowie Verbesserungen bei claude agents und mehrere Fehlerbehebungen bei MCP und Credentials.

  • Added skipLfs option to github/git plugin marketplace sources to skip Git LFS downloads during clone and update
  • Claude Code now shows a one-time notice when your npm global install can't auto-update; /doctor lists the fixes
  • Status line commands now receive COLUMNS and LINES environment variables so scripts can size output to the terminal width
  • claude agents: autocomplete in the dispatch input now suggests native slash commands and bundled skills, not just project skills
  • claude agents: PR column now shows PR #N for a single PR or N PRs for multiple
  • claude doctor now shows the result of your last update attempt
  • Combined the separate "needs authentication" startup notifications for MCP servers and connectors into a single message
  • macOS: background agents now appear as "Claude Code" in Privacy & Security and keep their permission grants across upgrades
  • Fixed stateful MCP servers without the optional GET SSE stream reconnect-looping on tools/list (regression in v2.1.147)
  • Fixed a regression where a custom API gateway could receive the user's Anthropic OAuth credential instead of the gateway's own token
  • Fixed subagent (Agent tool) frontmatter MCP servers ignoring --strict-mcp-config, --bare, remote mode, enterprise managed MCP config, and managed-settings MCP server allow/deny policies …

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Claude Code 2.1.152: /code-review --fix, /reload-skills und neue Hooks

/code-review --fix wendet Review-Funde auf den Working Tree an, /reload-skills liest Skill-Verzeichnisse neu ein, Skills können disallowed-tools setzen, es gibt neue Hook-Funktionen und ein MessageDisplay-Hook-Event, und Auto mode benötigt keine Zustimmung mehr.

  • /code-review --fix now applies review findings to your working tree after the review, surfacing reuse, simplification, and efficiency suggestions; /simplify now invokes /code-review --fix
  • Skills and slash commands can now set disallowed-tools in frontmatter to remove tools from the model while the skill is active
  • Added /reload-skills command to re-scan skill directories without restarting the session
  • SessionStart hooks can now return reloadSkills: true to re-scan skill directories, making skills installed by the hook available in the same session
  • SessionStart hooks can now set the session title via hookSpecificOutput.sessionTitle on startup and resume
  • Added a MessageDisplay hook event that lets hooks transform or hide assistant message text as it is displayed
  • Added pluginSuggestionMarketplaces managed setting: admins can allowlist org marketplaces whose plugins may be suggested via context-aware tips
  • claude plugin marketplace remove now accepts --scope user|project|local for symmetry with marketplace add, install, and uninstall
  • Claude Code now switches to your configured --fallback-model for the rest of the session when the primary model is not found, instead of failing every request
  • Auto mode no longer requires opt-in consent
  • Vim mode: / in NORMAL mode now opens reverse history search (like Ctrl+R), matching bash/zsh vi-mode …

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Claude Code Version 2.1.150

Version 2.1.150 enthält nur interne Infrastrukturverbesserungen ohne für Nutzer sichtbare Änderungen.

  • Internal infrastructure improvements (no user-facing changes)

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