Claude Code

• Rewrote terminal renderer for improved UI smoothness
• Enable/disable MCP servers by @mentioning or in /mcp
• Added tab completion for shell commands in bash mode
• PreToolUse hooks can now modify tool inputs
• Press Ctrl-G to edit your prompt in your system's configured text editor
• Fixes for bash permission checks with environment variables in the command

• Reduced system prompt size by 1.4k tokens
• IDE: Fixed keyboard shortcuts and focus issues for smoother interaction
• Fixed Opus fallback rate limit errors appearing incorrectly
• Fixed /add-dir command selecting wrong default tab

• Fix regression where bash backgrounding stopped working

• IDE: Fix IME unintended message submission with Enter and Tab
• IDE: Add "Open in Terminal" link in login screen
• Fix unhandled OAuth expiration 401 API errors
• SDK: Added SDKUserMessageReplay.isReplay to prevent duplicate messages

• Update Bedrock default Sonnet model to global.anthropic.claude-sonnet-4-5-20250929-v1:0
• IDE: Add drag-and-drop support for files and folders in chat
• /context: Fix counting for thinking blocks
• Improve message rendering for users with light themes on dark terminals
• Remove deprecated .claude.json allowedTools, ignorePatterns, env, and todoFeatureEnabled config options (configure these in settings.json instead)

• Skip Sonnet 4.5 default model setting change for Bedrock and Vertex
• Various bug fixes and presentation improvements

New native VS Code extension with fresh design throughout. Key features include /rewind to undo code changes, /usage command for plan limits, Tab to toggle thinking (sticky across sessions), Ctrl-R for history search, improved hook handling to reduce errors, SDK migration to Claude Agent SDK, and dynamic subagent support with --agents flag.

• Enable /context command for Bedrock and Vertex
• Add mTLS support for HTTP-based OpenTelemetry exporters

• Set CLAUDE_BASH_NO_LOGIN environment variable to skip login shell for BashTool
• Fix Bedrock and Vertex environment variables evaluating all strings as truthy
• No longer inform Claude of the list of allowed tools when permission is denied
• Fixed security vulnerability in Bash tool permission checks
• Improved VSCode extension performance for large files

• Bash permission rules now support output redirections when matching (e.g., Bash(python:*) matches python script.py > output.txt)
• Fixed thinking mode triggering on negation phrases like "don't think"
• Fixed rendering performance degradation during token streaming
• Added SlashCommand tool enabling Claude to invoke your slash commands
• Enhanced BashTool environment snapshot logging
• Fixed resuming conversations in headless mode unnecessarily enabling thinking
• Migrated --debug logging to file for easy tailing and filtering

• Add Ctrl-R history search to recall previous commands like bash/zsh
• Fix input lag while typing, especially on Windows
• Add sed command to auto-allowed commands in acceptEdits mode
• Fix Windows PATH comparison to be case-insensitive for drive letters
• Add permissions management hint to /add-dir output

• Fix Windows issue where process visually freezes on entering interactive mode
• Support dynamic headers for MCP servers via headersHelper configuration
• Fix thinking mode not working in headless sessions
• Fix slash commands now properly update allowed tools instead of replacing them

• Fix input lag during typing, especially noticeable with large prompts
• Improved VSCode extension command registry and sessions dialog user experience
• Enhanced sessions dialog responsiveness and visual feedback
• Fixed IDE compatibility issue by removing worktree support check
• Fixed security vulnerability where Bash tool permission checks could be bypassed using prefix matching

• Improve thinking mode display with enhanced visual effects
• Type /t to temporarily disable thinking mode in your prompt
• Improve path validation for glob and grep tools
• Show condensed output for post-tool hooks to reduce visual clutter
• Fix visual feedback when loading state completes
• Improve UI consistency for permission request dialogs

• Deprecated piped input in interactive mode
• Move Ctrl+R keybinding for toggling transcript to Ctrl+O

• Transcript mode (Ctrl+R): Added the model used to generate each assistant message
• Addressed issue where some Claude Max users were incorrectly recognized as Claude Pro users
• Hooks: Added systemMessage support for SessionEnd hooks
• Added spinnerTipsEnabled setting to disable spinner tips
• IDE: Various improvements and bug fixes

• /terminal-setup command now supports WezTerm
• MCP: OAuth tokens now proactively refresh before expiration
• Fixed reliability issues with background Bash processes

• /model now validates provided model names
• Fixed Bash tool crashes caused by malformed shell syntax parsing

• SDK: Added partial message streaming support via --include-partial-messages CLI flag

• Windows: Fixed path permission matching to consistently use POSIX format (e.g., Read(//c/Users/...))