This comprehensive changelog tracks Claude Code’s rapid evolution since its preview launch in February 2025. Each version brings significant improvements based on user feedback and real-world usage patterns.
v2.0.67 - December 11, 2025
AI-Powered Prompt Suggestions
Prompt Suggestions : Claude now suggests prompts to speed up your workflow - press Tab to accept or Enter to submitThinking Mode Default : Thinking mode is now enabled by default for Opus 4.5Thinking Config : Thinking mode configuration has moved to /configPermissions Search : Added search functionality to /permissions command with / keyboard shortcutDiagnostics : Show reason why autoupdater is disabled in /doctorBug Fixes :
Fixed false “Another process is currently updating Claude” error
Fixed MCP servers from .mcp.json stuck in pending state in non-interactive mode
Fixed word deletion/navigation with non-Latin text (Cyrillic, Greek, Arabic, Hebrew, Thai, Chinese)
Windows : Fixed plugin MCP servers failing due to colons in log directory paths
v2.0.65 - December 9, 2025
Model Switching While Typing
Quick Model Switch : Switch models while writing a prompt using alt+p (Linux/Windows) or option+p (macOS)Status Line : Added context window information to status line inputFile Suggestions : Added fileSuggestion setting for custom @ file search commandsShell Override : Added CLAUDE_CODE_SHELL environment variable to override automatic shell detectionBug Fixes : Fixed prompt not being saved to history when aborting with Escape
v2.0.64 - December 7, 2025
Named Sessions & Rules Directory
Auto-Compacting : Made auto-compacting instantAsync Operations : Agents and bash commands can run asynchronously and send messages to wake up the main agentStats Command : /stats now provides interesting stats: favorite model, usage graph, usage streakNamed Sessions :
Use /rename to name sessions
Use /resume <name> in REPL or claude --resume <name> from terminal
Rules Directory : Added support for .claude/rules/ directory (see memory documentation )Image Metadata : Added image dimension metadata when images are resizedResume Screen : Improved /resume screen with grouped forked sessions and keyboard shortcuts (P for preview, R for rename)VS Code : Added copy-to-clipboard button on code blocks and bash tool inputsBedrock : Improved efficiency of token counting, added support for aws login credentials
v2.0.62 - December 5, 2025
Attribution Settings
Recommended Indicator : Added “(Recommended)” indicator for multiple-choice questionsAttribution Setting : Added attribution setting to customize commit and PR bylines (deprecates includeCoAuthoredBy)Bug Fixes : Fixed duplicate slash commands, skill files symlink issues, lock file stale issues
v2.0.60 - December 3, 2025
Background Agent Support
Background Agents : Agents now run in background while you workCLI Flag : Added --disable-slash-commands flagCommit Attribution : Added model name to “Co-Authored-By” commit messagesMCP Toggle : Enabled /mcp enable [server-name] or /mcp disable [server-name] to quickly toggle serversFetch Optimization : Updated Fetch to skip summarization for pre-approved websitesVS Code : Added support for multiple terminal clients connecting to IDE server simultaneously
v2.0.59 - November 28, 2025
Agent Configuration
Agent CLI Flag : Added --agent CLI flag to override agent setting for current sessionAgent Setting : Added agent setting to configure main thread with specific agent’s system prompt, tool restrictions, and modelVS Code Fix : Fixed .claude.json config file being read from incorrect location
v2.0.58 - November 26, 2025
Opus 4.5 for Pro Users
Pro Access : Pro users now have access to Opus 4.5 as part of their subscription!Timer Fix : Fixed timer duration showing “11m 60s” instead of “12m 0s”Windows : Managed settings now prefer C:\Program Files\ClaudeCode if it exists
v2.0.57 - November 24, 2025
Plan Feedback & Streaming
Plan Feedback : Added feedback input when rejecting plansVS Code : Added streaming message support for real-time response display
v2.0.56 - November 22, 2025
Terminal Progress & VS Code Sidebar
Progress Bar : Added setting to enable/disable terminal progress bar (OSC 9;4)VS Code : Added support for VS Code’s secondary sidebar (VS Code 1.97+)
v2.0.55 - November 20, 2025
Improved UX
Proxy Fix : Fixed proxy DNS resolution being forced on by default (now opt-in via CLAUDE_CODE_PROXY_RESOLVES_HOSTS=true)Auto-Submit : Improved AskUserQuestion tool to auto-submit single-select questions on the last questionFuzzy Matching : Improved fuzzy matching for @ file suggestions
v2.0.51 - November 14, 2025
Claude Opus 4.5 & Desktop App
Opus 4.5 : Added Claude Opus 4.5! (Announcement )Desktop App : Introducing Claude Code for Desktop (Download )Plan Mode : Plan Mode now builds more precise plans and executes more thoroughlyUsage Notifications : Usage limit notifications easier to understandUsage Display : Switched /usage back to ”% used”
v1.0.70 - August 6, 2025
Performance and Windows Fixes
Performance : Optimized message rendering for better performance with large contextsWindows : Fixed native file search, ripgrep, and subagent functionality@-mentions : Added support for @-mentions in slash command arguments
v1.0.69 - August 5, 2025
Model Upgrade
Opus 4.1 : Upgraded Opus to version 4.1 with enhanced capabilities
v1.0.68 - August 4, 2025
Multiple Improvements
Model Names : Fixed incorrect model names being used for commands like /pr-commentsWindows Enhancements :
Improved permissions checks for allow/deny tools and project trust
Better sub-process spawning to eliminate “No such file or directory” errors with pnpm
Diagnostics : Enhanced /doctor command with CLAUDE.md and MCP tool context for self-serve debuggingSDK : Added canUseTool callback support for tool confirmationSettings : Added disableAllHooks settingPerformance : Improved file suggestions performance in large repos
v1.0.65 - July 31, 2025
IDE and Windows Stability
IDE : Fixed connection stability issues and error handling for diagnosticsWindows : Fixed shell environment setup for users without .bashrc files
v1.0.64 - July 30, 2025
Agents and SDK Updates
Agents : Added model customization support - specify which model an agent should useAgents : Fixed unintended access to the recursive agent toolHooks : Added systemMessage field to hook JSON output for displaying warnings and contextSDK : Fixed user input tracking across multi-turn conversationsSearch : Added hidden files to file search and @-mention suggestions
v1.0.63 - July 28, 2025
Windows Functionality Fixes
Fixed file search, @agent mentions, and custom slash commands functionality on Windows
v1.0.62 - July 26, 2025
Agent Mentions and Hooks
Agent Support : Added @-mention support with typeahead for custom agents (@<your-custom-agent>)Hooks : Added SessionStart hook for new session initializationCommands : /add-dir command now supports typeahead for directory pathsNetwork : Improved network connectivity check reliability
v1.0.61 - July 24, 2025
Transcript Mode and Settings
Transcript Mode : Changed Esc to exit transcript mode rather than interrupt (Ctrl+R)Settings : Added --settings flag to load settings from a JSON file
v1.0.60 - July 23, 2025
Custom Subagents
Major Feature : Create custom subagents for specialized tasks! Run /agents to get started
v1.0.59 - July 22, 2025
SDK and Hooks Enhancements
SDK : Added tool confirmation support with canUseTool callbackSDK : Allow specifying env for spawned processHooks : Exposed PermissionDecision to hooks (including “ask”)Hooks : UserPromptSubmit now supports additionalContext in advanced JSON outputModel Fix : Fixed issue where some Max users specifying Opus would still see fallback to Sonnet
v1.0.58 - July 20, 2025
PDF Support and Improvements
PDF Reading : Added support for reading PDF filesMCP : Improved server health status display in ‘claude mcp list’Hooks : Added CLAUDE_PROJECT_DIR env var for hook commands
v1.0.57 - July 19, 2025
Model Selection and Permissions
Slash Commands : Added support for specifying a model in slash commandsPermissions : Improved permission messages to help Claude understand allowed toolsFix : Remove trailing newlines from bash output in terminal wrapping
v1.0.56 - July 18, 2025
Windows and WSL Improvements
Windows : Enabled Shift+Tab for mode switching on Node.js versions supporting terminal VT modeWSL : Fixes for WSL IDE detectionAWS : Fixed issue causing awsRefreshHelper changes to .aws directory not to be picked up
v1.0.55 - July 17, 2025
Model Clarifications and Fixes
Models : Clarified knowledge cutoff for Opus 4.5 and Sonnet 4.5 modelsWindows : Fixed Ctrl+Z crashSDK : Added ability to capture error loggingSystem Prompt : Added --system-prompt-file option to override system prompt in print mode
v1.0.54 - July 16, 2025
Major Improvements
Hooks Enhancement : Added UserPromptSubmit hook with current working directory in hook inputsSlash Commands : Support for argument-hint field in custom command frontmatterWindows Improvements :
OAuth flow now uses port 45454 with correct browser URL construction
Mode-switching shortcut changed to Alt + M (fixing Shift+Tab conflict)
Plan mode renders properly in Windows terminals
Shell Execution : In-memory shell snapshot prevents file-related errors
v1.0.53 - July 11, 2025
Game-Changing Update
Context Expansion : @-mention file content limit increased from 100 to 2000 lines AWS Integration : Helper scripts for credential refresh:
awsAuthRefresh for SSO login operationsawsCredentialExport for background STS operations
v1.0.52 - July 10, 2025
MCP Instructions : Support for Model Context Protocol server instructionsContinued MCP integration improvements
v1.0.51 - July 8, 2025
Native Windows Support Launch
Windows Native : Runs without WSL (Git for Windows required for Git features)Cloud Integration : Amazon Bedrock support via AWS_BEARER_TOKEN_BEDROCKDiagnostics : /doctor command identifies and fixes invalid configurationsInteractive Mode : --append-system-prompt flag now works in interactive modePerformance : Auto-compaction threshold increased from 60% to 80%Telemetry : Enhanced OpenTelemetry metadata (OS, architecture, WSL version)Bug Fixes :
Directory names with spaces handled correctly
Custom commands in subdirectories register with proper namespacing
Plan mode rejection edge case resolved
v1.0.48 - July 7, 2025
Stability and UX Improvements
Critical Fix : Resolved freeze-on-launch bug from v1.0.45Bash Tool UX : Real-time progress showing last 5 lines of outputMCP Config : Environment variable expansion in server configsShell Reliability : Snapshots moved to ~/.claude directoryNew Hook : PreCompact hook for pre-compaction actionsVim Mode : Extended keybindings (c, f/F, t/T motions)
v1.0.44-45 - July 3, 2025
Search and Export Features
v1.0.44 :
New /export command for conversation transcripts
MCP resource_link results display properly
Ctrl+Z now suspends (resume with fg)
Prompt undo remapped to Ctrl+U
v1.0.45 :
Search Tool Overhaul : Redesigned grep tool with new parametersJupyter notebook diff view disabled (prevents timeouts)
Atomic config writes prevent corruption
Hooks refinement: Stop vs SubagentStop events
Custom command namespacing restored
v1.0.38 - June 30, 2025
Hooks System Introduction
User-Defined Hooks : Inject custom behavior at lifecycle eventsEnables logging, approvals, and integrations
Community-driven feature based on GitHub feedback
Major extensibility expansion
v1.0.27 - June 18, 2025
Real-Time MCP Integration
SSE Support : Server-Sent Events for MCP serversHTTP Transport : Additional transport optionOAuth 2.0 : Authentication for remote MCP serversResource Syntax : @server:protocol://path for external dataLive connections to external tool servers
v1.0.24-25 - June 25, 2025
Reliability Improvements
v1.0.24 :
Enhanced /mcp command formatting
Fixed array merging in nested settings
v1.0.25 :
Fixed : Slash commands not appearing/executingCustom command discovery overhaul
Ghostty proxy compatibility
Web search reliability improvements
v1.0.23 - June 11, 2025
CLI Package Update
Official NPM Package :
CLI Tool: @anthropic-ai/claude-code (NPM)
Note: No official Python package currently available
Enhanced CLI integration features
Improved streaming output support
v1.0.17-18 - June 9, 2025
Multi-Directory Support
v1.0.17 :
Sub-task messages in non-interactive mode
parent_tool_use_id for task correlationVS Code diff tool crash fixes
Process title shows as claude
v1.0.18 :
--add-dir flag for additional directoriesStreaming stdin support
CLAUDE_BASH_MAINTAIN_PROJECT_WORKING_DIR environment variableSSE auto-reconnection for MCP servers
v1.0.10-11 - June 4, 2025
General Availability Features
Access Expansion : Available to Pro and Max plansv1.0.10 : Markdown table rendering supportv1.0.11 :
/upgrade command for plan switchingEnhanced authentication UI
Improved to-do list management
v1.0.0 - May 22, 2025
General Availability Launch
Status : Graduated from preview to supported productModels : Claude Opus 4.5 and Sonnet 4.5 integrationCoincided with Claude 3.7 “Sonnet” model launch
v1.0.1 :
DISABLE_INTERLEAVED_THINKING flag optionProvider-specific model names in UI
v0.2.125 - May 21, 2025
Final Beta - Breaking Changes
Bedrock ARN : Changed from %2F to literal /Logging : DEBUG=true replaced with ANTHROPIC_LOG=debugPreparation for GA release
v0.2.117 - May 20, 2025
JSON Output : Changed to nested message objects (breaking change)Settings : cleanupPeriodDays configuration addedDebug Mode : Global --debug flag introduced
v0.2.108 - May 18, 2025
Interactive Thinking
Real-Time Steering : Send messages while Claude is “thinking”Bash Timeouts : BASH_DEFAULT_TIMEOUT_MS and BASH_MAX_TIMEOUT_MSFixed thinking mode in non-interactive mode
MCP wizard deprecated for dedicated commands
v0.2.105 - May 16, 2025
Web Browsing Capability
Web Search : New fetch tool for URLsStatus Command : /status replaces welcome message infoVim Motions : Word-level navigation (w, b, e)Performance optimizations for startup and file operations
v0.2.102 - May 14, 2025
Thinking Mode : Improved reliability and triggers@-mentions : Better handling of images and directoriesInput : Multiple large text chunks can be pasted
v0.2.93 - May 1, 2025
Session Management
Continue Sessions : claude --continue for recent sessionResume by ID : claude --resume <ID> for specific sessionsTo-Do List : Internal task management for complex operations
v0.2.82 - April 25, 2025
Permissions : --disallowedTools flag and configTool Renaming : Clearer names (LSTool→LS, View→Read)
v0.2.75 - April 20, 2025
Major Interactivity Update
Concurrent Queries : Queue messages while Claude is busyImage Support : Drag-and-drop or paste images@-mentions : Reference files directly in promptsMCP One-off : --mcp-config <path> flagAutocomplete : Performance improvements for large projects
v0.2.70 - April 15, 2025
Network Tools : curl and similar commands unlockedParallel Search : Multiple web queries simultaneouslyInterrupt : ESC key immediately stops Claude in auto-accept mode
v0.2.54 - March 25, 2025
Memory : # prefix for persistent contextLong Output : Ctrl+R reveals full tool outputMCP SSE : Server-Sent Events transport support
v0.2.47 - March 15, 2025
Auto-Compaction & QoL
Autocomplete : Tab completion for filenamesAuto-Accept : Shift+Tab toggles file edit approvalsInfinite Sessions : Automatic conversation compactionConfigurable via /config interface
v0.2.44 - March 14, 2025
Thinking Mode Introduction
Deep Reasoning : Triggered by “think” in promptsStep-by-step planning before execution
“Think harder” and “ultrathink” variations
v0.2.34 - March 8, 2025
Vim Mode & Custom Commands
Vim Keybindings : Toggle with /vimCustom Commands : .claude/commands/ directory supportNormal and insert modes with hjkl navigation
v0.2.0 - February 24, 2025
Research Preview Launch
Initial Release : Agentic coding tool for terminalCore capabilities:
Codebase scanning and understanding
Intelligent code search
File editing with permissions
Test suite execution
Git operations (commit, push, branch)
Shell command execution
Permission system for user control
Internal testing: 45-minute tasks completed in one pass
Release Frequency
Preview Phase : Multiple releases per weekPost-GA : 2-3 releases per week averageHotfixes : Within 24-48 hours when needed Version Numbering
Major : Significant feature additionsMinor : New capabilities and improvementsPatch : Bug fixes and small enhancements Breaking Changes
Clearly marked in changelog
Migration guides provided
Rare after GA (v1.0.0)
February 2025 : Core CLI capabilities and permission systemMarch 2025 : Vim mode, custom commands, thinking mode, auto-compactionApril 2025 : Images, @-mentions, concurrent queries, network toolsMay 2025 : Web browsing, session management, GA launch with new modelsJune 2025 : SDKs, Hooks system, real-time MCP, multi-directory supportJuly 2025 : Native Windows, 2000-line context, enhanced AWS integration, custom subagentsAugust 2025 : Opus 4.1 upgrade, performance optimizations, enhanced diagnosticsNovember 2025 : Claude Opus 4.5, Claude Code for Desktop, Pro users get Opus 4.5December 2025 : Background agents, named sessions, .claude/rules/, prompt suggestions, model switching (alt+p)
