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Claude Code Changelog

Complete version history of Claude Code releases, from early beta versions to the latest stable release. Each version includes feature additions, improvements, bug fixes, and links to relevant documentation. Features are documented in their first release version to help track when specific functionality became available.

Relevant posts: Custom Agents|Hooks|Claude Code SDK

v1.0.69​

  • Upgraded Opus to version 4.1

05/08/2025|See Also: Claude 4.1 Opus

v1.0.68​

  • Fix incorrect model names being used for certain commands like /pr-comments
  • Windows: improve permissions checks for allow / deny tools and project trust. This may create a new project entry in .claude.json - manually merge the history field if desired.
  • Windows: improve sub-process spawning to eliminate "No such file or directory" when running commands like pnpm
  • Enhanced /doctor command with CLAUDE.md and MCP tool context for self-serve debugging
  • SDK: Added canUseTool callback support for tool confirmation
  • Added disableAllHooks setting
  • Improved file suggestions performance in large repos

05/08/2025|See Also: Windows Installation|Hooks|Claude Code SDK

v1.0.65​

  • IDE: Fixed connection stability issues and error handling for diagnostics
  • Windows: Fixed shell environment setup for users without .bashrc files

01/08/25|See Also: Windows Installation

v1.0.64​

  • Agents: Added model customization support - you can now specify which model an agent should use
  • Agents: Fixed unintended access to the recursive agent tool
  • Hooks: Added systemMessage field to hook JSON output for displaying warnings and context
  • SDK: Fixed user input tracking across multi-turn conversations
  • Added hidden files to file search and @-mention suggestions

July 30, 2025|See Also: Custom Agents|Hooks|Claude Code SDK

v1.0.63​

  • Windows: Fixed file search, @agent mentions, and custom slash commands functionality

July 29, 2025|See Also: Windows Installation|Custom Agents|Custom Slash Commands

v1.0.62​

  • Added @-mention support with typeahead for custom agents. @<your-custom-agent> to invoke it
  • Hooks: Added SessionStart hook for new session initialization
  • /add-dir command now supports typeahead for directory paths
  • Improved network connectivity check reliability

July 28, 2025|See Also: Custom Subagents|Hooks

v1.0.61​

  • Transcript mode (Ctrl+R): Changed Esc to exit transcript mode rather than interrupt
  • Settings: Added --settings flag to load settings from a JSON file
  • Settings: Fixed resolution of settings files paths that are symlinks
  • OTEL: Fixed reporting of wrong organization after authentication changes
  • Slash commands: Fixed permissions checking for allowed-tools with Bash
  • IDE: Added support for pasting images in VSCode MacOS using ⌘+V
  • IDE: Added CLAUDE_CODE_AUTO_CONNECT_IDE=false for disabling IDE auto-connection
  • Added CLAUDE_CODE_SHELL_PREFIX for wrapping Claude and user-provided shell commands run by Claude Code

July 25, 2025|See Also: Configuration|Custom Slash Commands

v1.0.60​

  • You can now create custom subagents for specialized tasks! Run /agents to get started

July 24, 2025|See Also: Task Agent Tools|Custom Subagents

v1.0.59​

  • SDK: Added tool confirmation support with canUseTool callback
  • SDK: Allow specifying env for spawned process
  • Hooks: Exposed PermissionDecision to hooks (including "ask")
  • Hooks: UserPromptSubmit now supports additionalContext in advanced JSON output
  • Fixed issue where some Max users that specified Opus would still see fallback to Sonnet

July 23, 2025|See Also: Claude Code SDK|Hooks

v1.0.58​

  • Added support for reading PDFs
  • MCP: Improved server health status display in 'claude mcp list'
  • Hooks: Added CLAUDE_PROJECT_DIR env var for hook commands

July 23, 2025|See Also: Hooks|MCPs

v1.0.57​

  • Added support for specifying a model in slash commands
  • Improved permission messages to help Claude understand allowed tools
  • Fix: Remove trailing newlines from bash output in terminal wrapping

July 23, 2025|See Also: Custom Slash Commands|Auto-Accept Permissions

v1.0.56​

  • Windows: Enabled shift+tab for mode switching on versions of Node.js that support terminal VT mode
  • Fixes for WSL IDE detection
  • Fix an issue causing awsRefreshHelper changes to .aws directory not to be picked up

July 23, 2025|See Also: Windows Installation|Configuration

v1.0.55​

  • Clarified knowledge cutoff for Opus 4 and Sonnet 4 models
  • Windows: fixed Ctrl+Z crash
  • SDK: Added ability to capture error logging
  • Add --system-prompt-file option to override system prompt in print mode

July 23, 2025|See Also: Model Comparison|Windows Installation|Claude Code SDK

v1.0.54​

  • Hooks: Added UserPromptSubmit hook and the current working directory to hook inputs
  • Custom slash commands: Added argument-hint to frontmatter
  • Windows: OAuth uses port 45454 and properly constructs browser URL
  • Windows: mode switching now uses alt + m, and plan mode renders properly
  • Shell: Switch to in-memory shell snapshot to file-related errors

July 19, 2025|See Also: Hooks|Custom Slash Commands|Windows Installation

v1.0.53​

  • Updated @-mention file truncation from 100 lines to 2000 lines
  • Add helper script settings for AWS token refresh: awsAuthRefresh (for foreground operations like aws sso login) and awsCredentialExport (for background operation with STS-like response).

July 18, 2025|See Also: Configuration

v1.0.52​

  • Added support for MCP server instructions

July 18, 2025|See Also: MCPs

v1.0.51​

  • Added support for native Windows (requires Git for Windows)
  • Added support for Bedrock API keys through environment variable AWS_BEARER_TOKEN_BEDROCK
  • Settings: /doctor can now help you identify and fix invalid setting files
  • --append-system-prompt can now be used in interactive mode, not just --print/-p.
  • Increased auto-compact warning threshold from 60% to 80%
  • Fixed an issue with handling user directories with spaces for shell snapshots
  • OTEL resource now includes os.type, os.version, host.arch, and wsl.version (if running on Windows Subsystem for Linux)
  • Custom slash commands: Fixed user-level commands in subdirectories
  • Plan mode: Fixed issue where rejected plan from sub-task would get discarded

July 11, 2025|See Also: Plan Mode|Windows Installation|Custom Slash Commands

v1.0.48​

  • Fixed a bug in v1.0.45 where the app would sometimes freeze on launch
  • Added progress messages to Bash tool based on the last 5 lines of command output
  • Added expanding variables support for MCP server configuration
  • Moved shell snapshots from /tmp to ~/.claude for more reliable Bash tool calls
  • Improved IDE extension path handling when Claude Code runs in WSL
  • Hooks: Added a PreCompact hook
  • Vim mode: Added c, f/F, t/T

July 10, 2025|See Also: Hooks

v1.0.45​

  • Redesigned Search (Grep) tool with new tool input parameters and features
  • Disabled IDE diffs for notebook files, fixing "Timeout waiting after 1000ms" error
  • Fixed config file corruption issue by enforcing atomic writes
  • Updated prompt input undo to Ctrl+_ to avoid breaking existing Ctrl+U behavior, matching zsh's undo shortcut
  • Stop Hooks: Fixed transcript path after /clear and fixed triggering when loop ends with tool call
  • Custom slash commands: Restored namespacing in command names based on subdirectories. For example, .claude/frontend/component.md is now /frontend:component, not /component.

July 9, 2025|See Also: Custom Slash Commands|Hooks

v1.0.44​

  • New /export command lets you quickly export a conversation for sharing
  • MCP: resource_link tool results are now supported
  • MCP: tool annotations and tool titles now display in /mcp view
  • Changed Ctrl+Z to suspend Claude Code. Resume by running fg. Prompt input undo is now Ctrl+U.

July 7, 2025|See Also: MCPs|Suspend/Resume

v1.0.43​

  • Fixed a bug where the theme selector was saving excessively
  • Hooks: Added EPIPE system error handling

July 3, 2025|See Also: Hooks

v1.0.42​

  • Added tilde (~) expansion support to /add-dir command

July 3, 2025|See Also: /add-dir FAQ

v1.0.41​

  • Hooks: Split Stop hook triggering into Stop and SubagentStop
  • Hooks: Enabled optional timeout configuration for each command
  • Hooks: Added "hook_event_name" to hook input
  • Fixed a bug where MCP tools would display twice in tool list
  • New tool parameters JSON for Bash tool in tool_decision event

See Also: Hooks

v1.0.40​

  • Fixed a bug causing API connection errors with UNABLE_TO_GET_ISSUER_CERT_LOCALLY if NODE_EXTRA_CA_CERTS was set

v1.0.39​

  • New Active Time metric in OpenTelemetry logging

July 2, 2025

v1.0.38​

July 2, 2025|See Also: Hooks

v1.0.37​

  • Remove ability to set Proxy-Authorization header via ANTHROPIC_AUTH_TOKEN or apiKeyHelper

July 2, 2025

v1.0.36​

  • Web search now takes today's date into context
  • Fixed a bug where stdio MCP servers were not terminating properly on exit

July 2, 2025|See Also: MCPs

v1.0.35​

  • Added support for MCP OAuth Authorization Server discovery

June 25, 2025|See Also: MCPs

v1.0.34​

  • Fixed a memory leak causing a MaxListenersExceededWarning message to appear

June 24, 2025

v1.0.33​

  • Improved logging functionality with session ID support
  • Added undo functionality (Ctrl+Z and vim 'u' command)
  • Improvements to plan mode

June 24, 2025|See Also: Plan Mode

v1.0.32​

  • Updated loopback config for litellm
  • Added forceLoginMethod setting to bypass login selection screen

June 24, 2025|See Also: Configuration

v1.0.31​

  • Fixed a bug where ~/.claude.json would get reset when file contained invalid JSON

June 24, 2025

v1.0.30​

  • Custom slash commands: Run bash output, @-mention files, enable thinking with thinking keywords
  • Improved file path autocomplete with filename matching
  • Added timestamps in Ctrl-r mode and fixed Ctrl-c handling
  • Enhanced jq regex support for complex filters with pipes and select

June 24, 2025|See Also: Slash Commands

v1.0.29​

  • Improved CJK character support in cursor navigation and rendering

June 24, 2025

v1.0.28​

  • Slash commands: Fix selector display during history navigation
  • Resizes images before upload to prevent API size limit errors
  • Added XDG_CONFIG_HOME support to configuration directory
  • Performance optimizations for memory usage
  • New attributes (terminal.type, language) in OpenTelemetry logging

June 24, 2025|See Also: Configuration

v1.0.27​

  • Streamable HTTP MCP servers are now supported
  • Remote MCP servers (SSE and HTTP) now support OAuth
  • MCP resources can now be @-mentioned

June 18, 2025|See Also: MCP Resources

v1.0.25​

  • Slash commands: moved "project" and "user" prefixes to descriptions
  • Slash commands: improved reliability for command discovery
  • Improved support for Ghostty
  • Improved web search reliability

June 16, 2025|See Also: Slash Commands

v1.0.24​

  • Improved /mcp output
  • Fixed a bug where settings arrays got overwritten instead of merged

June 16, 2025|See Also: MCPs

v1.0.23​

  • Released TypeScript SDK: import @anthropic-ai/claude-code to get started
  • Released Python SDK: pip install claude-code-sdk to get started

June 16, 2025|See Also: Claude Code SDK

v1.0.22​

  • SDK: Renamed total_cost to total_cost_usd

June 12, 2025|See Also: CC Usage

v1.0.21​

  • Improved editing of files with tab-based indentation
  • Fix for tool_use without matching tool_result errors
  • Fixed a bug where stdio MCP server processes would linger after quitting Claude Code

June 12, 2025

v1.0.18​

  • Added --add-dir CLI argument for specifying additional working directories
  • Added streaming input support without require -p flag
  • Improved startup performance and session storage performance
  • Added CLAUDE_BASH_MAINTAIN_PROJECT_WORKING_DIR environment variable to freeze working directory for bash commands
  • Added detailed MCP server tools display (/mcp)
  • MCP authentication and permission improvements
  • Added auto-reconnection for MCP SSE connections on disconnect
  • Fixed issue where pasted content was lost when dialogs appeared

June 10, 2025|See Also: Configuration|Additional Working Directories|MCPs

v1.0.17​

  • We now emit messages from sub-tasks in -p mode

June 10, 2025

v1.0.16​

  • Additional improvements and bug fixes (look for the parent_tool_use_id property)
  • Fixed crashes when the VS Code diff tool is invoked multiple times quickly
  • MCP server list UI improvements
  • Update Claude Code process title to display claude instead of node

June 6, 2025

v1.0.11​

  • Claude Code can now also be used with a Claude Pro subscription
  • Added /upgrade for smoother switching to Claude Max plans
  • Improved UI for authentication from API keys and Bedrock/Vertex/external auth tokens
  • Improved shell configuration error handling
  • Improved todo list handling during compaction

June 4, 2025|See Also: Pricing|Model Comparison|Installation

v1.0.10​

  • Added markdown table support
  • Improved streaming performance

June 3, 2025

v1.0.8​

  • Fixed Vertex AI region fallback when using CLOUD_ML_REGION
  • Increased default otel interval from 1s -> 5s
  • Fixed edge cases where MCP_TIMEOUT and MCP_TOOL_TIMEOUT weren't being respected
  • Fixed a regression where search tools unnecessarily asked for permissions
  • Added support for triggering thinking non-English languages
  • Improved compacting UI

June 2, 2025|See Also: Restarting Claude Code|Context Window Depletion

v1.0.7​

  • Renamed /allowed-tools -> /permissions
  • Migrated allowedTools and ignorePatterns from .claude.json -> settings.json
  • Deprecated claude config commands in favor of editing settings.json
  • Fixed a bug where --dangerously-skip-permissions sometimes didn't work in --print mode
  • Improved error handling for /install-github-app
  • Bugfixes, UI polish, and tool reliability improvements

June 2, 2025|See Also: Auto-Accept Permissions|Configuration

v1.0.6​

  • Improved edit reliability for tab-indented files
  • Respect CLAUDE_CONFIG_DIR everywhere
  • Reduced unnecessary tool permission prompts
  • Added support for symlinks in @file typeahead
  • Bugfixes, UI polish, and tool reliability improvements

June 2, 2025|See Also: Configuration

v1.0.4​

  • Fixed a bug where MCP tool errors weren't being parsed correctly

May 28, 2025

v1.0.1​

  • Added DISABLE_INTERLEAVED_THINKING to give users the option to opt out of interleaved thinking
  • Improved model references to show provider-specific names (Sonnet 3.7 for Bedrock, Sonnet 4 for Console)
  • Updated documentation links and OAuth process descriptions

May 22, 2025|See Also: Configuration

v1.0.0​

  • Claude Code is now generally available
  • Introducing Sonnet 4 and Opus 4 models

May 22, 2025|See Also: Model Comparison|Installation|Getting Started

v0.2.125​

  • Breaking change: Bedrock ARN passed to ANTHROPIC_MODEL or ANTHROPIC_SMALL_FAST_MODEL should no longer contain an escaped slash (specify / instead of %2F)
  • Removed DEBUG=true in favor of ANTHROPIC_LOG=debug, to log all requests

May 21, 2025|See Also: Configuration

v0.2.117​

  • Breaking change: --print JSON output now returns nested message objects, for forwards-compatibility as we introduce new metadata fields
  • Introduced settings.cleanupPeriodDays
  • Introduced CLAUDE_CODE_API_KEY_HELPER_TTL_MS env var
  • Introduced --debug mode

May 18, 2025

v0.2.108​

  • You can now send messages to Claude while it works to steer Claude in real-time
  • Introduced BASH_DEFAULT_TIMEOUT_MS and BASH_MAX_TIMEOUT_MS env vars
  • Fixed a bug where thinking was not working in -p mode
  • Fixed a regression in /cost reporting
  • Deprecated MCP wizard interface in favor of other MCP commands
  • Lots of other bugfixes and improvements

May 13, 2025

v0.2.107​

  • CLAUDE.md files can now import other files. Add @path/to/file.md to ./CLAUDE.md to load additional files on launch

May 9, 2025|See Also: CLAUDE.md Supremacy

v0.2.106​

  • MCP SSE server configs can now specify custom headers
  • Fixed a bug where MCP permission prompt didn't always show correctly

May 9, 2025

v0.2.105​

  • Claude can now search the web
  • Moved system & account status to /status
  • Added word movement keybindings for Vim
  • Improved latency for startup, todo tool, and file edits

May 8, 2025

v0.2.102​

  • Improved thinking triggering reliability
  • Improved @mention reliability for images and folders
  • You can now paste multiple large chunks into one prompt

May 5, 2025

v0.2.100​

  • Fixed a crash caused by a stack overflow error
  • Made db storage optional; missing db support disables --continue and --resume

v0.2.98​

  • Fixed an issue where auto-compact was running twice

May 2, 2025

v0.2.95​

May 1, 2025

v0.2.93​

  • Resume conversations from where you left off from with claude --continue and claude --resume
  • Claude now has access to a Todo list that helps it stay on track and be more organized

April 30, 2025

v0.2.82​

  • Added support for --disallowedTools
  • Renamed tools for consistency: LSTool -> LS, View -> Read, etc.

April 25, 2025|See Also: Auto-Accept Permissions|Configuration

v0.2.75​

  • Hit Enter to queue up additional messages while Claude is working
  • Drag in or copy/paste image files directly into the prompt
  • @-mention files to directly add them to context
  • Run one-off MCP servers with claude --mcp-config <path-to-file>
  • Improved performance for filename auto-complete

April 21, 2025|See Also: MCPs & Add-ons|Configuration

v0.2.7​

  • Additional updates and fixes
  • Added support for refreshing dynamically generated API keys (via apiKeyHelper), with a 5 minute TTL
  • Task tool can now perform writes and run bash commands

April 17, 2025

v0.2.72​

  • Updated spinner to indicate tokens loaded and tool usage

April 18, 2025

v0.2.70​

  • Network commands like curl are now available for Claude to use
  • Claude can now run multiple web queries in parallel
  • Pressing ESC once immediately interrupts Claude in Auto-accept mode

v0.2.69​

  • Fixed UI glitches with improved Select component behavior
  • Enhanced terminal output display with better text truncation logic

v0.2.67​

  • Shared project permission rules can be saved in .claude/settings.json

v0.2.66​

  • Print mode (-p) now supports streaming output via --output-format=stream-json
  • Fixed issue where pasting could trigger memory or bash mode unexpectedly

v0.2.63​

  • Fixed an issue where MCP tools were loaded twice, which caused tool call errors

v0.2.61​

  • Navigate menus with vim-style keys (j/k) or bash/emacs shortcuts (Ctrl+n/p) for faster interaction
  • Enhanced image detection for more reliable clipboard paste functionality
  • Fixed an issue where ESC key could crash the conversation history selector

v0.2.59​

  • Copy+paste images directly into your prompt
  • Improved progress indicators for bash and fetch tools
  • Bugfixes for non-interactive mode (-p)

v0.2.54​

  • Quickly add to Memory by starting your message with #
  • Press ctrl+r to see full output for long tool results
  • Added support for MCP SSE transport

v0.2.53​

  • New web fetch tool lets Claude view URLs that you paste in
  • Fixed a bug with JPEG detection

v0.2.50​

  • New MCP "project" scope now allows you to add MCP servers to .mcp.json files and commit them to your repository

v0.2.49​

  • Previous MCP server scopes have been renamed: previous "project" scope is now "local" and "global" scope is now "user"

v0.2.47​

  • Press Tab to auto-complete file and folder names
  • Press Shift + Tab to toggle auto-accept for file edits
  • Automatic conversation compaction for infinite conversation length (toggle with /config)

April 6, 2025|See Also: Auto-Accept Permissions

v0.2.44​

  • Ask Claude to make a plan with thinking mode: just say 'think' or 'think harder' or even 'ultrathink'

v0.2.41​

  • MCP server startup timeout can now be configured via MCP_TIMEOUT environment variable
  • MCP server startup no longer blocks the app from starting up

v0.2.37​

  • New /release-notes command lets you view release notes at any time
  • claude config add/remove commands now accept multiple values separated by commas or spaces

v0.2.36​

  • Import MCP servers from Claude Desktop with claude mcp add-from-claude-desktop
  • Add MCP servers as JSON strings with claude mcp add-json <n> <json>

April 2, 2025|See Also: MCPs & Add-ons|Configuration

v0.2.34​

  • Vim bindings for text input - enable with /vim or /config

v0.2.32​

  • Interactive MCP setup wizard: Run claude mcp add to add MCP servers with a step-by-step interface
  • Fix for some PersistentShell issues

v0.2.31​

  • Custom slash commands: Markdown files in .claude/commands/ directories now appear as custom slash commands to insert prompts into your conversation
  • MCP debug mode: Run with --mcp-debug flag to get more information about MCP server errors

March 30, 2025|See Also: CLAUDE.md Supremacy|Slash Commands

v0.2.30​

  • Added ANSI color theme for better terminal compatibility
  • Fixed issue where slash command arguments weren't being sent properly
  • (Mac-only) API keys are now stored in macOS Keychain

v0.2.26​

  • New /approved-tools command for managing tool permissions
  • Word-level diff display for improved code readability
  • Fuzzy matching for slash commands

March 28, 2025|See Also: Auto-Accept Permissions|Configuration

v0.2.21​

  • Fuzzy matching for /commands
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