Changelog

Complete Claude Code version history with all releases, features, and bug fixes from v0.2 beta to current.

Latest Releases

v1.0.88 (August 22, 2025)

Fixed OAuth authentication error - Resolved "OAuth authentication is currently not supported" issue
Enhanced status line - Now includes exceeds_200k_tokens indicator to warn when approaching context limits
Fixed cost tracking - /cost command now accurately tracks usage
New model environment variables - Added ANTHROPIC_DEFAULT_SONNET_MODEL and ANTHROPIC_DEFAULT_OPUS_MODEL for customizing model aliases
Bedrock update - Default Sonnet model updated to Sonnet 4 for AWS Bedrock users

v1.0.86 (August 21, 2025)

Context debugging - New /context command helps diagnose context window issues
SDK improvements - UUID support for all SDK messages, plus --replay-user-messages flag for debugging

v1.0.85 (August 20, 2025)

Cost visibility - Status line now shows real-time session costs
Hooks enhancement - New SessionEnd hook for cleanup operations

v1.0.84 (August 19, 2025)

Network stability - Fixed tool_use/tool_result ID mismatch errors during unstable connections
Real-time steering - Improved Claude's responsiveness to user input while working
File mentions - ~/.claude/* files now appear in @-mention suggestions
Built-in ripgrep - Now default (disable with USE_BUILTIN_RIPGREP=0)

v1.0.83 (August 18, 2025)

Path improvements - @-mentions now support file paths with spaces
Visual update - New shimmering spinner animation

v1.0.82 (August 16, 2025)

SDK enhancements - Request cancellation support and custom directory search
Settings validation - Prevents invalid fields in .claude/settings.json
MCP consistency - Improved tool naming conventions
Bash stability - Fixed crashes when reading large files automatically

v1.0.81 (August 14, 2025)

Output styles released - New educational styles "Explanatory" and "Learning" for better code explanations
Agent fixes - Improved custom agent loading with unparsable files

v1.0.80 (August 14, 2025)

UI improvements - Better text contrast for custom subagent colors

v1.0.77 (August 13, 2025)

Bash enhancements - Fixed heredoc/multiline strings and stderr handling
SDK updates - Session support and permission tracking
Token management - Fixed errors in conversation summarization
Opus Plan Mode - New /model setting to use Opus only for planning

v1.0.73 (August 12, 2025)

MCP flexibility - Support multiple config files: --mcp-config file1.json file2.json
OAuth control - Press Esc to cancel authentication flows
Command validation - Reduced false security warnings
Alpine Linux support - Now works with musl-based distributions

v1.0.72 (August 12, 2025)

Permission control - /permissions command for tool confirmation settings

v1.0.71 (August 8, 2025)

Background commands - Ctrl+B runs commands in background (perfect for dev servers)
Custom status line - Add terminal prompts with /statusline

v1.0.70 (August 7, 2025)

Performance boost - Optimized rendering for large contexts
Windows fixes - Native file search, ripgrep, and subagents now working
@-mentions in commands - Use file references in slash command arguments

v1.0.69 (August 5, 2025)

Opus 4.1 - Major model upgrade with improved capabilities

v1.0.68 (August 5, 2025)

Windows improvements - Better permissions and subprocess handling
Enhanced debugging - /doctor command includes CLAUDE.md and MCP context
SDK callbacks - canUseTool support for tool confirmation
Performance - Better file suggestion speed in large repositories

v1.0.65 (August 1, 2025)

IDE stability - Fixed connection issues and diagnostics
Windows setup - Fixed shell environment for users without .bashrc

v1.0.64 (July 30, 2025)

Agent models - Specify which model each custom agent uses
Recursive tool fix - Prevented unintended recursive agent access
Hooks messaging - System messages for warnings and context
Hidden files - Now included in file search and @-mentions

v1.0.63 (July 29, 2025)

Windows functionality - File search, @agent mentions, and slash commands fixed

v1.0.62 (July 28, 2025)

Agent @-mentions - Type @<agent-name> with autocomplete
Session hooks - SessionStart hook for initialization
Directory typeahead - /add-dir now has path completion

v1.0.61 (July 25, 2025)

Transcript mode - Esc exits transcript mode (Ctrl+R)
Settings flexibility - --settings flag loads custom JSON configs
IDE integration - macOS image paste support (⌘+V)
Shell wrapping - CLAUDE_CODE_SHELL_PREFIX for command customization

v1.0.60 (July 24, 2025)

Custom subagents - Create specialized agents with /agents command

Earlier Versions

v1.0.0 - v1.0.59

Claude Code General Availability and Core Features

v1.0.59 - SDK tool confirmation, environment specification
v1.0.58 - PDF support, improved MCP server display
v1.0.57 - Model specification in slash commands
v1.0.56 - Windows shift+tab mode switching
v1.0.55 - Knowledge cutoff clarification for models
v1.0.54 - UserPromptSubmit hook, Windows OAuth fixes
v1.0.53 - @-mention file limit increased to 2000 lines
v1.0.52 - MCP server instructions support
v1.0.51 - Native Windows support (requires Git for Windows)
v1.0.48 - Shell snapshot improvements, PreCompact hook
v1.0.45 - Redesigned Search tool, atomic config writes
v1.0.44 - /export command for conversation sharing
v1.0.43 - Theme selector optimization
v1.0.42 - Tilde expansion in /add-dir
v1.0.41 - Hook improvements and timeout configuration
v1.0.40 - SSL certificate error fixes
v1.0.39 - Active Time metric for usage tracking
v1.0.38 - Hooks system released - Extensibility framework
v1.0.36 - Web search with date context
v1.0.35 - MCP OAuth discovery support
v1.0.33 - Undo functionality (Ctrl+Z)
v1.0.30 - Custom slash commands with bash execution
v1.0.27 - MCP streaming and OAuth support
v1.0.23 - SDK release - TypeScript and Python SDKs
v1.0.18 - --add-dir argument, MCP improvements
v1.0.11 - Claude Pro subscription support
v1.0.10 - Markdown tables, streaming improvements
v1.0.7 - Settings migration to settings.json
v1.0.1 - Interleaved thinking option
v1.0.0 - General Availability with Sonnet 4 and Opus 4

v0.2.x Series (Beta)

Pre-release development phase

v0.2.125 - Bedrock ARN format change
v0.2.117 - JSON output restructuring
v0.2.108 - Real-time steering during execution
v0.2.107 - CLAUDE.md file imports
v0.2.105 - Web search introduction
v0.2.100 - Database storage optional
v0.2.93 - Todo list and conversation resume
v0.2.82 - Tool renaming for consistency
v0.2.75 - Image paste and @-mentions
v0.2.70 - Network commands enabled
v0.2.59 - Image clipboard support
v0.2.54 - Memory quick-add with '#'
v0.2.50 - MCP project scope
v0.2.47 - Auto-complete and auto-compact
v0.2.44 - Thinking mode ("think harder")
v0.2.36 - MCP import from Claude Desktop
v0.2.34 - Vim bindings introduction
v0.2.31 - Custom slash commands debut
v0.2.26 - Tool permissions management

Key Features Timeline

Major Milestones

August 2025: Opus 4.1, output styles, background commands
July 2025: Custom agents, native Windows support, hooks system
May 2025: General availability, Sonnet 4 & Opus 4 models
April 2025: Web search, thinking mode, MCP servers
March 2025: Beta features, vim bindings, custom commands

Platform Support Evolution

Windows: Full native support (v1.0.51+)
Linux: Alpine/musl support (v1.0.73+)
macOS: Keychain integration (v0.2.30+)
WSL: Enhanced IDE detection (v1.0.56+)

Developer Tools Progress

SDK: TypeScript & Python (v1.0.23+)
Hooks: Full extensibility (v1.0.38+)
MCP: OAuth, streaming, multi-config (v1.0.27+)
Custom Agents: Model specification (v1.0.64+)

This changelog tracks official Anthropic Claude Code releases. For ClaudeFast-specific features and integrations, see our ClaudeFast documentation.

Note: Version numbers and dates are based on official Anthropic releases. Some features may require specific subscription tiers or additional configuration.

Claude Code Changelog: Complete Version History