Anthropic Release Notes

• Merged slash commands and skills, simplifying the mental model with no change in behavior
• Added release channel (stable or latest) toggle to /config
• Added detection and warnings for unreachable permission rules, with warnings in /doctor and after saving rules that include the source of each rule and actionable fix guidance
• Fixed plan files persisting across /clear commands, now ensuring a fresh plan file is used after clearing a conversation
• Fixed false skill duplicate detection on filesystems with large inodes (e.g., ExFAT) by using 64-bit precision for inode values
• Fixed mismatch between background task count in status bar and items shown in tasks dialog
• Fixed sub-agents using the wrong model during conversation compaction
• Fixed web search in sub-agents using incorrect model
• Fixed trust dialog acceptance when running from the home directory not enabling trust-requiring features like hooks during the session
• Improved terminal rendering stability by preventing uncontrolled writes from corrupting cursor state
• Improved slash command suggestion readability by truncating long descriptions to 2 lines
• Changed tool hook execution timeout from 60 seconds to 10 minutes
• [VSCode] Added clickable destination selector for permission requests, allowing you to choose where settings are saved (this project, all projects, shared with team, or session only)

• Added source path metadata to images dragged onto the terminal, helping Claude understand where images originated
• Added clickable hyperlinks for file paths in tool output in terminals that support OSC 8 (like iTerm)
• Added support for Windows Package Manager (winget) installations with automatic detection and update instructions
• Added Shift+Tab keyboard shortcut in plan mode to quickly select "auto-accept edits" option
• Added FORCE_AUTOUPDATE_PLUGINS environment variable to allow plugin autoupdate even when the main auto-updater is disabled
• Added agent_type to SessionStart hook input, populated if --agent is specified
• Fixed a command injection vulnerability in bash command processing where malformed input could execute arbitrary commands
• Fixed a memory leak where tree-sitter parse trees were not being freed, causing WASM memory to grow unbounded over long sessions
• Fixed binary files (images, PDFs, etc.) being accidentally included in memory when using @include directives in CLAUDE.md files
• Fixed updates incorrectly claiming another installation is in progress
• Fixed crash when socket files exist in watched directories (defense-in-depth for EOPNOTSUPP errors)
• Fixed remote session URL and teleport being broken when using /tasks command
• Fixed MCP tool names being exposed in analytics events by sanitizing user-specific server configurations …

• Added LSP (Language Server Protocol) tool for code intelligence features like go-to-definition, find references, and hover documentation
• Added /terminal-setup support for Kitty, Alacritty, Zed, and Warp terminals
• Added ctrl+t shortcut in /theme to toggle syntax highlighting on/off
• Added syntax highlighting info to theme picker
• Added guidance for macOS users when Alt shortcuts fail due to terminal configuration
• Fixed skill allowed-tools not being applied to tools invoked by the skill
• Fixed Opus 4.5 tip incorrectly showing when user was already using Opus
• Fixed a potential crash when syntax highlighting isn't initialized correctly
• Fixed visual bug in /plugins discover where list selection indicator showed while search box was focused
• Fixed macOS keyboard shortcuts to display 'opt' instead of 'alt'
• Improved /context command visualization with grouped skills and agents by source, slash commands, and sorted token count
• [Windows] Fixed issue with improper rendering
• [VSCode] Added gift tag pictogram for year-end promotion message

• Added clickable [Image #N] links that open attached images in the default viewer
• Added alt-y yank-pop to cycle through kill ring history after ctrl-y yank
• Added search filtering to the plugin discover screen (type to filter by name, description, or marketplace)
• Added support for custom session IDs when forking sessions with --session-id combined with --resume or --continue and --fork-session
• Fixed slow input history cycling and race condition that could overwrite text after message submission
• Improved /theme command to open theme picker directly
• Improved theme picker UI
• Improved search UX across resume session, permissions, and plugins screens with a unified SearchBox component
• [VSCode] Added tab icon badges showing pending permissions (blue) and unread completions (orange)

Skills for organizations, partners, and the ecosystem

In October, we introduced skills—a way to teach Claude repeatable workflows tailored to how you work. Skills are now easier to deploy, discover, and build with organization-wide management for Team and Enterprise plans, a directory of partner-built skills, and an open standard (Agent Skills) so skills work across AI platforms.

Claude in Chrome updates

Claude in Chrome is now available in beta to all paid plan subscribers, including Pro, Team, and Enterprise plans.

• Claude Code integration: Build in your terminal with Claude Code, then test and verify in the browser with the Chrome extension. Claude can read console errors, network requests, and DOM state to help debug issues directly.

• Control browser actions from Claude Desktop: Start a task in Claude Desktop and let it handle work in the browser without switching windows.

• Record a workflow: Teach Claude your workflow by recording the steps, and Claude learns to repeat them. Useful for repetitive browser tasks you want to delegate.

• Console logs: Claude can now read browser console output, helping developers identify and fix errors without switching contexts.

• Admin controls for Team and Enterprise: Admins can now manage Claude in Chrome at the organization level: …

• We've launched Claude Opus 4.5, our most intelligent model combining maximum capability with practical performance. Ideal for complex specialized tasks, professional software engineering, and advanced agents. Features step-change improvements in vision, coding, and computer use at a more accessible price point than previous Opus models. Learn more in Models overview.
• We've launched programmatic tool calling in public beta, allowing Claude to call tools from within code execution to reduce latency and token usage in multi-tool workflows.
• We've launched the tool search tool in public beta, enabling Claude to dynamically discover and load tools on-demand from large tool catalogs.
• We've launched the effort parameter in public beta for Claude Opus 4.5, allowing you to control token usage by trading off between response thoroughness and efficiency.
• We've added client-side compaction to our Python and TypeScript SDKs, automatically managing conversation context through summarization when using tool_runner.

Claude Opus 4.5 launch

We released our most powerful frontier model to date. Read our blog post for more information: Introducing Claude Opus 4.5.

Claude for Excel beta release

Claude for Excel is now available in beta to all Max, Team, and Enterprise users. We’ve added some additional capabilities, such as support for pivot tables, charts and file uploads, plus a shortcut to quickly open the full Claude app from Excel (ctrl+option+c). We've also made overall improvements to performance, speed, context management, and the general user experience. See Use Claude for Excel.

Context window compaction

We’ve changed our context window functionality to enable infinite-length conversations (with some exceptions) and significantly reduce length limit errors by summarizing earlier messages when a chat approaches its context limit. Read more here: Understanding Usage and Length Limits.

Claude in Chrome updates

Claude in Chrome is now available in beta to all Max plan subscribers. After months of testing, we're expanding access with the following updates:

• Scheduled tasks: Set recurring browser tasks to run automatically on your schedule. Set it once and Claude handles it from there. …

• We've launched Agent Skills (skills-2025-10-02 beta), a new way to extend Claude's capabilities. Skills are organized folders of instructions, scripts, and resources that Claude loads dynamically to perform specialized tasks. The initial release includes:

  • Anthropic-managed Skills: Pre-built Skills for working with PowerPoint (.pptx), Excel (.xlsx), Word (.docx), and PDF files
  • Custom Skills: Upload your own Skills through the Skills API (/v1/skills endpoints) to package domain expertise and organizational workflows
  • Skills require the code execution tool to be enabled
  • Learn more in Agent Skills and API reference