Claude Code Release History

Condensed changelog of Claude Code official releases. Full details: github.com/anthropics/claude-code/CHANGELOG.md Machine-readable: claude-code-releases.yaml

Latest: v2.1.69 | Updated: 2026-03-05

Quick Jump

2.1.x Series (January-March 2026) — Worktree isolation, background agents, ConfigChange hook, Fast mode Opus 4.6, 1M context, claude.ai MCP connectors, remote-control, auto-memory, /copy command, HTTP hooks, worktree config sharing, ultrathink re-introduced, InstructionsLoaded hook, 4 security fixes
2.0.x Series (Nov 2025 - Jan 2026) — Opus 4.5, Claude in Chrome, Background agents
Breaking Changes Summary
Milestone Features

2.1.x Series (January-March 2026)

v2.1.69 (2026-03-04)

Security: Fixed nested skill discovery loading skills from gitignored directories like node_modules — critical security fix
Security: Fixed symlink bypass allowing writes outside working directory in acceptEdits mode
Security: Fixed trust dialog silently enabling all .mcp.json servers on first run (per-server approval now required)
Security: Fixed sandbox not blocking non-allowed domains when allowManagedDomainsOnly is enabled
New: InstructionsLoaded hook event fires when CLAUDE.md or .claude/rules/*.md files are loaded into context
New: agent_id, agent_type, worktree fields added to all hook events (subagent tracking, worktree metadata)
New: ${CLAUDE_SKILL_DIR} variable for skills to reference their own installation directory in SKILL.md content
New: /reload-plugins command to activate pending plugin changes without restarting Claude Code
New: Voice STT expanded to 20 languages (+10: Russian, Polish, Turkish, Dutch, Ukrainian, Greek, Czech, Danish, Swedish, Norwegian)
New: sandbox.enableWeakerNetworkIsolation setting (macOS) for Go tools (gh, gcloud, terraform) behind MITM proxy
New: includeGitInstructions setting (and CLAUDE_CODE_DISABLE_GIT_INSTRUCTIONS env var) to remove built-in commit/PR instructions from system prompt
New: oauth.authServerMetadataUrl config option for MCP servers with custom OAuth discovery
New: pluginTrustMessage in managed settings for organization-specific plugin trust context
New: Optional --name argument for /remote-control to set a custom session title visible in claude.ai/code
Changed: Sonnet 4.5 users on Pro/Max/Team auto-migrated to Sonnet 4.6
Changed: /resume picker now shows most recent prompt instead of first one
Fixed: 15+ memory leaks — React Compiler memoCache, REPL render scopes (~35MB over 1000 turns), teammate history pinning, hook event accumulation
Fixed: ~16MB baseline memory reduction (deferred Yoga WASM preloading)
Fixed: MCP binary content (PDFs, Office docs, audio) now saved to disk with correct extension instead of raw base64 in context
Fixed: Startup performance — skills/plugins loading, worktree git subprocess, macOS keychain, managed settings
Fixed: Escape not interrupting running turn when input box has draft text
Fixed: Duplicate CLAUDE.md, slash commands, agents, and rules when running from nested worktree
Fixed: macOS keychain corruption with multiple OAuth MCP servers (stdin buffer overflow)

v2.1.68 (2026-03-04)

Changed: Opus 4.6 now defaults to medium effort for Max and Team subscribers (sweet spot between speed and thoroughness)
New: Re-introduced ultrathink keyword to enable high effort for the next turn specifically
Breaking: Opus 4 and Opus 4.1 removed from Claude Code on first-party API — users auto-migrated to Opus 4.6

v2.1.66 (2026-03-04)

Fixed: Reduced spurious error logging

v2.1.63 (2026-02-27)

New: HTTP hooks — hooks can now POST JSON to a URL and receive JSON back, instead of running a shell command. Useful for CI/CD integrations and stateless backend endpoints (v2.1.63+)
New: Project configs & auto-memory now shared across all git worktrees of the same repository
New: /simplify and /batch bundled slash commands
New: ENABLE_CLAUDEAI_MCP_SERVERS=false env var to opt out of claude.ai MCP server exposure
Improved: /model command shows currently active model in picker
Fixed: Major wave of memory leaks — WebSocket listeners, MCP caches, git root detection cache, JSON parsing cache, bash prefix cache, subagent AppState after compaction, MCP server fetch caches on reconnect
Fixed: VSCode remote sessions not appearing in conversation history
Fixed: /clear not resetting cached skills (stale skill content persisted to new conversation)
Fixed: Local slash command output (e.g. /cost) appearing as user messages in UI

v2.1.62 (2026-02-27)

Fixed: Prompt suggestion cache regression that reduced cache hit rates

v2.1.61 (2026-02-27)

Fixed: Concurrent writes corrupting config file on Windows

v2.1.59 (2026-02-26)

New: Auto-memory — Claude automatically saves useful context to memory; manage with /memory
New: /copy command — interactive picker when code blocks are present, select individual blocks or full response
Improved: Smarter “always allow” prefix suggestions for compound bash commands (per-subcommand prefixes instead of treating whole command as one)
Improved: Memory usage in multi-agent sessions (releases completed subagent task state)
Improved: Ordering of short task lists
Fixed: MCP OAuth token refresh race condition when running multiple Claude Code instances simultaneously
Fixed: Shell commands not showing clear error message when working directory has been deleted
Fixed: Config file corruption that could wipe authentication when multiple Claude Code instances ran simultaneously

v2.1.58 (2026-02-26)

Expanded: Remote Control available to more users

v2.1.56 (2026-02-25)

Fixed: VSCode: Another cause of “command ‘claude-vscode.editor.openLast’ not found” crashes

v2.1.55 (2026-02-25)

Fixed: BashTool failing on Windows with EINVAL error

v2.1.53 (2026-02-25)

Fixed: UI flicker where user input briefly disappeared after submission before rendering
Fixed: Bulk agent kill (ctrl+f) now sends single aggregate notification instead of one per agent, and properly clears command queue
Fixed: Graceful shutdown sometimes leaving stale sessions when using Remote Control (parallelized teardown)
Fixed: --worktree flag sometimes being ignored on first launch
Fixed: Panic (“switch on corrupted value”) on Windows
Fixed: Crash when spawning many processes on Windows
Fixed: Crash in WebAssembly interpreter on Linux x64 & Windows x64
Fixed: Crash that sometimes occurred after 2 minutes on Windows ARM64

v2.1.52 (2026-02-24)

Fixed: VSCode extension crash on Windows (“command ‘claude-vscode.editor.openLast’ not found”)

v2.1.51 (2026-02-24)

New: claude remote-control subcommand for external builds — enables local environment serving for all users
New: Custom npm registries and specific version pinning when installing plugins from npm sources
New: SDK: CLAUDE_CODE_ACCOUNT_UUID, CLAUDE_CODE_USER_EMAIL, CLAUDE_CODE_ORGANIZATION_UUID env vars to provide account info synchronously (eliminates race conditions in early telemetry)
Changed: BashTool now skips login shell (-l flag) by default when shell snapshot is available — performance improvement (previously required CLAUDE_BASH_NO_LOGIN=true)
Changed: Tool results larger than 50K characters now persisted to disk (previously 100K threshold)
Improved: /model picker now shows human-readable labels (e.g., “Sonnet 4.5”) instead of raw model IDs for pinned versions, with upgrade hint when newer version available
Fixed: Security issue where statusLine and fileSuggestion hook commands could execute without workspace trust acceptance in interactive mode
Fixed: Duplicate control_response messages from WebSocket reconnects causing API 400 errors
Fixed: Slash command autocomplete crashing when a plugin’s SKILL.md description is a YAML array or other non-string type

v2.1.50 (2026-02-21)

New: WorktreeCreate and WorktreeRemove hook events — custom VCS setup/teardown when agent worktree isolation creates or removes worktrees
New: isolation: worktree in agent definitions for declarative worktree isolation (no longer requires setting in each call)
New: claude agents CLI command to list all configured agents
New: startupTimeout configuration for LSP servers
New: CLAUDE_CODE_DISABLE_1M_CONTEXT env var to disable 1M context window support
New: Pre-configured OAuth client credentials for MCP servers that don’t support Dynamic Client Registration (Slack); use --client-id and --client-secret with claude mcp add
New: VSCode /extra-usage command support
Changed: Opus 4.6 (fast mode) now includes full 1M context window
Changed: CLAUDE_CODE_SIMPLE mode now also disables MCP tools, attachments, hooks, and CLAUDE.md loading for fully minimal experience
Fixed: Bug where resumed sessions could be invisible when working directory involved symlinks
Fixed: disableAllHooks setting to respect managed settings hierarchy (non-managed settings can no longer disable managed hooks)
Fixed: Linux: native modules not loading on systems with glibc older than 2.30 (RHEL 8)
Fixed: Memory leak in agent teams where completed teammate tasks were never garbage collected
Fixed: Memory leak where completed task state objects were never removed from AppState
Fixed: Memory leak where LSP diagnostic data was never cleaned up after delivery
Fixed: Unbounded memory growth in long sessions (file history snapshots capped; circular buffer fix; stream buffers released after use)
Fixed: MCP tools not discovered when tool search is enabled and prompt passed as launch argument
Fixed: Prompt suggestion cache regression that reduced cache hit rates
Improved: Startup performance for headless mode (-p) by deferring Yoga WASM and UI component imports
Improved: Memory usage during long sessions by clearing internal caches after compaction and clearing large tool results after processing

v2.1.49 (2026-02-20)

New: --worktree / -w CLI flag to start Claude in an isolated git worktree
New: Subagents support isolation: "worktree" for working in a temporary git worktree
New: background: true field in agent definitions to always run as a background task
New: ConfigChange hook event — fires when configuration files change during a session (enterprise security auditing + blocking)
New: Plugins can ship settings.json for default configuration
New: --from-pr flag to resume sessions linked to a specific GitHub PR (+ sessions auto-linked when created via gh pr create)
New: PreToolUse hooks can return additionalContext to the model
New: plansDirectory setting to customize where plan files are stored
New: auto:N syntax for configuring MCP tool search auto-enable threshold
New: Setup hook event triggered via --init, --init-only, or --maintenance CLI flags
Changed: Sonnet 4.5 1M context removed from Max plan — Sonnet 4.6 now has 1M context (switch in /model)
Changed: Simple mode now includes file edit tool (not just Bash)
Fixed: File-not-found errors now suggest corrected paths when model drops repo folder
Fixed: Ctrl+C and ESC silently ignored when background agents running + main thread idle (double-press within 3s now kills all agents)
Fixed: Plugin enable/disable auto-detects correct scope (no longer defaults to user scope)
Fixed: Context window blocking limit calculated too aggressively (~65% instead of ~98%)
Fixed: Memory issues causing crashes with parallel subagents
Fixed: Memory leak in long sessions where stream resources not cleaned up
Fixed: @ symbol incorrectly triggering file autocomplete in bash mode
Fixed: Background agent results returning raw transcript data instead of final answer
Fixed: Slash command autocomplete selecting wrong command (e.g. /context vs /compact)
Improved: @ mention file suggestion speed (~3× faster in git repos)
Improved: MCP connection: list_changed notification support for dynamic tool updates without reconnection
Improved: Skills invoke progress display; skill suggestions prioritize recently/frequently used
Improved: Incremental output for async agents; token count includes background agent tokens

v2.1.47 (2026-02-19)

Improved: VS Code plan preview auto-updates as Claude iterates; commenting enabled only when plan is ready for review; preview stays open when rejected for revision
New: ctrl+f kills all background agents simultaneously (replaces double-ESC); ESC now cancels main thread only, background agents keep running
New: last_assistant_message field added to Stop and SubagentStop hook inputs (access final response without parsing transcript files)
New: chat:newline keybinding action; added_dirs in statusline JSON workspace section
Fixed: Compaction failing when conversation contains many PDF documents (strips document blocks alongside images)
Fixed: Edit tool corrupting Unicode curly quotes (" " ' ') by replacing with straight quotes
Fixed: Parallel file write/edit — single file failure no longer aborts sibling operations
Fixed: OSC 8 hyperlinks only clickable on first line when link text wraps across multiple terminal lines
Fixed: Bash permission classifier now validates match descriptions against actual input rules (prevents hallucinated permissions)
Fixed: Config backups timestamped and rotated (5 most recent kept) instead of overwriting
Fixed: Session name lost after context compaction; plan mode lost after compaction
Fixed: Hooks (PreToolUse, PostToolUse) silently failing on Windows (now uses Git Bash)
Fixed: Custom agents/skills not discovered in git worktrees (main repo .claude/ now included)
Fixed: 70+ additional rendering, session, permission, and platform fixes

v2.1.46 (2026-02-19)

Fixed: Orphaned Claude Code processes after terminal disconnect on macOS
New: Support for using claude.ai MCP connectors in Claude Code

v2.1.45 (2026-02-17)

New: Claude Sonnet 4.6 model support
New: spinnerTipsOverride setting — customize spinner tips via tips array, opt out of built-in tips with excludeDefault: true
New: SDK SDKRateLimitInfo and SDKRateLimitEvent types for rate limit status tracking (utilization, reset times, overage)
Fixed: Agent Teams teammates failing on Bedrock, Vertex, and Foundry (env vars now propagated to tmux-spawned processes)
Fixed: Sandbox “operation not permitted” errors on macOS temp file writes
Fixed: Task tool (backgrounded agents) crashing with ReferenceError on completion
Improved: Memory usage for large shell command outputs (RSS no longer grows unboundedly)
Improved: Startup performance (removed eager session history loading)
Improved: Plugin-provided commands, agents, and hooks available immediately after install (no restart needed)

v2.1.44 (2026-02-17)

Fixed: Auth refresh errors

v2.1.43 (2026-02-17)

Fixed: AWS auth refresh hanging indefinitely (added 3-minute timeout)
Fixed: Structured-outputs beta header being sent unconditionally on Vertex/Bedrock
Fixed: Spurious warnings for non-agent markdown files in .claude/agents/ directory

v2.1.42 (2026-02-14)

Improved: Startup performance via deferred Zod schema construction (faster on large projects)
Improved: Prompt cache hit rate by moving date outside the system prompt (avoids daily cache invalidation)
New: Opus 4.6 effort callout for eligible users (one-time onboarding)
Fixed: /resume showing interrupt messages as session titles
Fixed: Image dimension limit errors now suggest using /compact instead of opaque failure

v2.1.41 (2026-02-13)

New: Guard against launching Claude Code inside another Claude Code session
New: claude auth login, claude auth status, claude auth logout CLI subcommands
New: Windows ARM64 (win32-arm64) native binary support
Added speed attribute to OTel events and trace spans for fast mode visibility
Improved: /rename auto-generates session name from conversation context when called without arguments
Improved narrow terminal layout for prompt footer
Fixed: Agent Teams using wrong model identifier for Bedrock, Vertex, and Foundry customers
Fixed: Crash when MCP tools return image content during streaming
Fixed: /resume session previews showing raw XML tags instead of readable command names
Fixed: Opus 4.6 launch announcement showing for Bedrock/Vertex/Foundry users
Fixed: Hook blocking errors (exit code 2) not showing stderr to the user
Fixed: Structured-outputs beta header sent unconditionally on Vertex/Bedrock
Fixed: File resolution for @-mentions with anchor fragments (e.g., @README.md#installation)
Fixed: FileReadTool blocking on FIFOs, /dev/stdin, and large files
Fixed: Background task notifications not delivered in streaming Agent SDK mode
Fixed: Auto-compact failure error notifications shown to users
Fixed: Stale permission rules not clearing when settings change on disk
Fixed: Permission wait time included in subagent elapsed time display
Fixed: Proactive ticks firing while in plan mode
Improved: Model error messages for Bedrock/Vertex/Foundry with fallback suggestions

v2.1.39 (2026-02-10)

Improved: Terminal rendering performance
Fixed: Fatal errors being swallowed instead of displayed
Fixed: Process hanging after session close
Fixed: Character loss at terminal screen boundary
Fixed: Blank lines in verbose transcript view

v2.1.38 (2026-02-10)

Fixed: VS Code terminal scroll-to-top regression introduced in 2.1.37
Fixed: Tab key queueing slash commands instead of autocompleting
Fixed: Bash permission matching for commands using environment variable wrappers
Fixed: Text between tool uses disappearing when not using streaming
Security: Improved heredoc delimiter parsing to prevent command smuggling
Security: Blocked writes to .claude/skills directory in sandbox mode

v2.1.37 (2026-02-08)

Fixed /fast not immediately available after enabling /extra-usage

v2.1.36 (2026-02-08) ⭐

⭐ Fast mode now available for Opus 4.6 — Same model, faster output. Toggle with /fast. Learn more

v2.1.34 (2026-02-07)

Fixed a crash when agent teams setting changed between renders
Security fix: Commands excluded from sandboxing (via sandbox.excludedCommands or dangerouslyDisableSandbox) could bypass the Bash ask permission rule when autoAllowBashIfSandboxed was enabled

v2.1.33 (2026-02-06)

Highlights:

Agent teams fixes — Improved tmux session handling and availability warnings
New hook events — TeammateIdle and TaskCompleted for multi-agent workflows
Agent frontmatter enhancements:
- memory field for user/project/local scope memory selection
- Task(agent_type) syntax to restrict sub-agent spawning in agent definitions
Plugin identification — Plugin name now shown in skill descriptions and /skills menu
VSCode improvements — Remote sessions support, branch/message count in session picker
Fixed: Thinking interruption, streaming abort, proxy settings, /resume XML markup
Improved: API connection errors show specific cause instead of generic message
Improved: Invalid managed settings errors now surfaced properly
Multiple stability fixes across agent workflows and tool interactions

v2.1.32 (2026-02-05) ⭐ MAJOR

Highlights:

⭐ Claude Opus 4.6 is now available!
⭐ Agent teams research preview — Multi-agent collaboration for complex tasks (token-intensive, requires CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1)
⭐ Automatic memory recording and recall — Claude now automatically records and recalls memories as it works
“Summarize from here” — Message selector now allows partial conversation summarization
Skills from .claude/skills/ in --add-dir directories auto-load
Fixed: @ file completion showing incorrect relative paths from subdirectories
Fixed: Bash tool no longer throws “Bad substitution” errors with JavaScript template literals (e.g., ${index + 1})
Improved: Skill character budget now scales with context window (2% of context)
Improved: --resume re-uses --agent value from previous conversation by default
Fixed: Thai/Lao spacing vowels rendering issues
[VSCode] Fixed slash commands incorrectly executing when pressing Enter with preceding text
[VSCode] Added spinner when loading past conversations list

v2.1.31 (2026-02-03)

Session resume hint — Exit message now shows how to continue your conversation later
Full-width (zenkaku) space support — Added Japanese IME checkbox selection support
Fixed: PDF too large errors permanently locking sessions (now recoverable without starting new conversation)
Fixed: Bash commands incorrectly reporting “Read-only file system” when sandbox enabled
Fixed: Plan mode crash when project config missing default fields
Fixed: temperatureOverride being silently ignored in streaming API path
Fixed: LSP shutdown/exit compatibility with strict language servers
Improved: System prompts now guide model toward Read/Edit/Glob/Grep tools instead of bash equivalents
Improved: PDF and request size error messages show actual limits (100 pages, 20MB)
Reduced: Layout jitter when spinner appears/disappears during streaming

v2.1.30 (2026-02-02)

⭐ PDF page range support — pages parameter in Read tool for PDFs (e.g., pages: "1-5") with lightweight references for large PDFs (>10 pages)
⭐ Pre-configured OAuth for MCP servers — Built-in client credentials for servers without Dynamic Client Registration (Slack support via --client-id and --client-secret)
⭐ New /debug command — Claude can help troubleshoot current session issues
Additional git flags — Support for git log and git show read-only flags (--topo-order, --cherry-pick, --format, --raw)
Task tool metrics — Results now include token count, tool uses, and duration
Reduced motion mode — New config option for accessibility
Fixed: Phantom “(no content)” text blocks in API history (reduces token waste)
Fixed: Prompt cache not invalidating when tool schemas changed
Fixed: 400 errors after /login with thinking blocks
Fixed: Session resume hang with corrupted parentUuid cycles
Fixed: Rate limit showing wrong “/upgrade” for Max 20x users
Fixed: Permission dialogs stealing focus while typing
Fixed: Subagents unable to access SDK MCP tools
Fixed: Windows users with .bashrc unable to run bash
Improved: Memory usage for --resume (68% reduction for many sessions)
Improved: TaskStop displays stopped command description instead of generic message
Changed: /model executes immediately instead of queuing
[VSCode] Added multiline input in “Other” text fields (Shift+Enter for new lines)
[VSCode] Fixed duplicate sessions in session list

v2.1.29 (2026-01-31)

Performance: Fixed startup performance issues when resuming sessions with saved hook context
Significantly improved session recovery speed for long-duration sessions

v2.1.27 (2026-01-29)

New: --from-pr flag to resume sessions linked to a specific GitHub PR number or URL
New: Sessions automatically linked to PRs when created via gh pr create
Added tool call failures and denials to debug logs
Fixed context management validation error for Bedrock/Vertex gateway users
Fixed /context command not displaying colored output
Fixed status bar duplicating background task indicator when PR status was shown
[Windows] Fixed bash command execution failing for users with .bashrc files
[Windows] Fixed console windows flashing when spawning child processes
[VSCode] Fixed OAuth token expiration causing 401 errors after extended sessions

v2.1.25 (2026-01-30)

Fixed beta header validation for Bedrock and Vertex gateway users — Ensures CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS=1 environment variable works correctly

v2.1.23 (2026-01-29)

Customizable spinner verbs — New spinnerVerbs setting allows personalization of spinner action words
mTLS and corporate proxy connectivity fixes — Improved support for users behind corporate proxies with client certificates
Per-user temp directory isolation — Prevents permission conflicts on shared systems
Improved terminal rendering performance — Optimized screen data layout for faster updates
Fixed: Prompt caching race condition causing 400 errors
Fixed: Async hooks not canceling when headless streaming ends
Fixed: Tab completion not updating input field
Fixed: Ripgrep search timeouts returning empty results instead of errors
Changed: Bash commands show timeout duration alongside elapsed time
Changed: Merged PRs show purple status indicator in prompt footer
[IDE] Fixed: Model options displaying incorrect region strings for Bedrock users in headless mode

v2.1.22 (2026-01-28)

Improved task UI performance with virtualization — Task list now uses virtual scrolling for better responsiveness with many tasks
Vim selection and deletion fixes — Fixed visual mode selections and dw command behavior
LSP improvements: Kotlin support, UTF-16 range handling, better error recovery
Tasks now consistently use task-N IDs instead of internal UUIDs
Fixed: # keyboard shortcut not working in task creation fields
Fixed: Compact tool use rendering in chat history
Fixed: Session URL escaping in git commit messages
Fixed: Command output handling improvements

v2.1.21 (2026-01-28)

Skills/commands can specify required/recommended Claude Code version — Use minClaudeCodeVersion and recommendedClaudeCodeVersion in frontmatter
New TaskCreate fields: category (testing, implementation, documentation, etc.), checklist (subtasks as markdown list), parentId (task hierarchy)
Automatic Claude Code update checking at session start (respects auto-update settings)
Tasks appear in /context output with ‘Disable tasks’ shortcut for quick toggling
Improved task UI: Delete button added, better empty state messaging
Fixed: Task deletion now properly removes all related task data
Fixed: Shell environment variables expanded correctly in hook commands
Fixed: Pasted URLs with parentheses properly formatted in markdown
Fixed: Bash output capture for commands with large output

v2.1.20 (2026-01-27)

New: TaskUpdate tool can delete tasks via status="deleted"
New: PR review status indicator in prompt footer — Shows PR state (approved, changes requested, pending, draft) as colored dot with clickable link
Arrow key history navigation in vim normal mode when cursor cannot move further
External editor shortcut (Ctrl+G) added to help menu
Support for loading CLAUDE.md from --add-dir directories (requires CLAUDE_CODE_ADDITIONAL_DIRECTORIES_CLAUDE_MD=1)
Fixed: Session compaction issues causing full history load instead of compact summary
Fixed: Agents ignoring user messages while actively working
Fixed: Wide character (emoji, CJK) rendering artifacts
Improved: Task list dynamically adjusts to terminal height
Changed: Background agents prompt for tool permissions before launching
Changed: Config backups timestamped and rotated (keeps 5 most recent)

v2.1.19 (2026-01-25)

New: CLAUDE_CODE_ENABLE_TASKS environment variable — Set to false to temporarily revert to old task system
New: Argument shorthand in custom commands — Use $0, $1, etc. instead of verbose syntax
[VSCode] Session forking and rewind functionality enabled for all users
Fixed: Crashes on processors without AVX instruction support
Fixed: Dangling Claude Code processes when terminal closed (SIGKILL fallback)
Fixed: /rename and /tag not updating correct session when resuming from different directory (git worktrees)
Fixed: Resuming sessions by custom title from different directory
Fixed: Pasted text lost when using prompt stash (Ctrl+S) and restore
Fixed: Agent list displaying “Sonnet (default)” instead of “Inherit (default)” for agents without explicit model
Fixed: Backgrounded hook commands blocking session instead of returning early
Fixed: File write preview omitting empty lines
Changed: Skills without additional permissions/hooks allowed without approval
[SDK] Added replay of queued_command attachment messages when replayUserMessages enabled

⚠️ Breaking:

Indexed argument syntax changed: $ARGUMENTS.0 → $ARGUMENTS[0] (bracket syntax)

v2.1.18 (2026-01-24) ⭐

⭐ Customizable keyboard shortcuts — Configure keybindings per context, create chord sequences, personalize workflow
Run /keybindings to get started
Learn more: code.claude.com/docs/en/keybindings

v2.1.17 (2026-01-23)

Fix: Crashes on processors without AVX instruction support

v2.1.16 (2026-01-22) ⭐

⭐ New task management system with dependency tracking
[VSCode] Native plugin management support
[VSCode] OAuth users can browse and resume remote sessions from Sessions dialog
Fixed: Out-of-memory crashes when resuming sessions with heavy subagent usage
Fixed: “Context remaining” warning not hidden after /compact
[IDE] Fixed race condition on Windows where sidebar view container wouldn’t appear

v2.1.15 (2026-01-22)

⚠️ Deprecation notice for npm installations — Run claude install or see docs
Improved UI rendering performance with React Compiler
Fixed: MCP stdio server timeout not killing child process, which could cause UI freezes

v2.1.14 (2026-01-21)

History-based autocomplete in bash mode — Type ! followed by a partial command and press Tab to complete from bash history
Search functionality in installed plugins list
Support for pinning plugins to specific git commit SHAs for exact version control
Fixed: Context window blocking limit calculated too aggressively (~65% instead of ~98%)
Fixed: Memory issues and leaks in long-running sessions with parallel subagents
Fixed: @ symbol incorrectly triggering file autocomplete in bash mode
Fixed: Slash command autocomplete selecting wrong command for similar names
Improved: Backspace deletes pasted text as single token

v2.1.12 (2026-01-18)

Bug fix: Message rendering

v2.1.11 (2026-01-17)

Fix: Excessive MCP connection requests for HTTP/SSE transports

v2.1.10 (2026-01-17)

New Setup hook event (—init, —init-only, —maintenance flags)
Keyboard shortcut ‘c’ to copy OAuth URL
File suggestions show as removable attachments
[VSCode] Plugin install count + trust warnings

v2.1.9 (2026-01-16)

auto:N syntax for MCP tool search threshold — Configure when Tool Search activates: ENABLE_TOOL_SEARCH=auto:5 (5% context), auto:10 (default), auto:20 (conservative). See architecture.md for details.
plansDirectory setting for custom plan file locations
Session URL attribution to commits/PRs from web sessions
PreToolUse hooks can return additionalContext
${CLAUDE_SESSION_ID} string substitution for skills

v2.1.7 (2026-01-15)

showTurnDuration setting to hide turn duration messages
MCP Tool Search auto mode enabled by default — Lazy loading for MCP tools when definitions exceed 10% of context. Based on Anthropic’s Advanced Tool Use API feature. Result: 85% token reduction on tool definitions, improved tool selection accuracy (Opus 4: 49%→74%, Opus 4.5: 79.5%→88.1%)
Inline display of agent final response in task notifications

⚠️ Breaking:

OAuth/API Console URLs changed: console.anthropic.com → platform.claude.com
Security fix: Wildcard permission rules could match compound commands

v2.1.6 (2026-01-14)

Search functionality in /config command
Date range filtering in /stats (press r to cycle)
Auto-discovery of skills from nested .claude/skills directories
Updates section in /doctor showing auto-update channel

⚠️ Security Fix: Permission bypass via shell line continuation

v2.1.5 (2026-01-13)

CLAUDE_CODE_TMPDIR environment variable for custom temp directory

v2.1.4 (2026-01-12)

CLAUDE_CODE_DISABLE_BACKGROUND_TASKS environment variable

v2.1.3 (2026-01-11)

Merged slash commands and skills (simplified mental model)
Release channel toggle (stable/latest) in /config
/doctor warnings for unreachable permission rules

v2.1.2 (2026-01-10)

Windows Package Manager (winget) support
Clickable hyperlinks for file paths (OSC 8 terminals)
Shift+Tab shortcut in plan mode for auto-accept edits
Large bash outputs saved to disk instead of truncated

⚠️ Breaking:

Security fix: Command injection in bash command processing
Deprecated: C:\ProgramData\ClaudeCode managed settings path

v2.1.0 (2026-01-08) ⭐ MAJOR

Highlights:

⭐ Automatic skill hot-reload — Skills modified in ~/.claude/skills or .claude/skills immediately available
⭐ Shift+Enter works OOTB in iTerm2, WezTerm, Ghostty, Kitty
⭐ New Vim motions: ; , y yy Y p P text objects (iw aw i" etc.) >> << J
Unified Ctrl+B for backgrounding all running tasks
/plan command shortcut to enable plan mode
Slash command autocomplete anywhere in input
language setting for response language (e.g., language: "japanese")
Skills context: fork support for forked sub-agent context
Hooks support in agent/skill/command frontmatter
MCP list_changed notifications support
/teleport and /remote-env commands for web sessions
Disable specific agents with Task(AgentName) syntax
--tools flag in interactive mode
YAML-style lists in frontmatter allowed-tools

⚠️ Breaking:

OAuth URLs: console.anthropic.com → platform.claude.com
Removed permission prompt for entering plan mode
[SDK] Minimum zod peer dependency: ^4.0.0

2.0.x Series (November 2025 - January 2026)

v2.0.76 (2026-01-05)

Fix: macOS code-sign warning with Claude in Chrome

v2.0.74 (2026-01-04) ⭐

⭐ LSP (Language Server Protocol) tool for code intelligence (go-to-definition, find references, hover)
/terminal-setup for Kitty, Alacritty, Zed, Warp
Ctrl+T in /theme to toggle syntax highlighting
Grouped skills/agents by source in /context

v2.0.72 (2026-01-02) ⭐

⭐ Claude in Chrome (Beta) — Control browser directly from Claude Code
Reduced terminal flickering
QR code for mobile app download
Thinking toggle changed: Tab → Alt+T

v2.0.70 (2025-12-30)

Enter key accepts/submits prompt suggestions immediately
Wildcard syntax mcp__server__* for MCP tool permissions
Auto-update toggle for plugin marketplaces
3x memory usage improvement for large conversations

⚠️ Breaking: Removed # shortcut for quick memory entry

v2.0.67 (2025-12-26) ⭐

⭐ Thinking mode enabled by default for Opus 4.5
Thinking config moved to /config
Search in /permissions with / shortcut

v2.0.64 (2025-12-22) ⭐

⭐ Instant auto-compacting
⭐ Async agents and bash commands with wake-up messages
/stats with usage graphs, streaks, favorite model
Named sessions: /rename, /resume <name>
Support for .claude/rules/ directory
Image dimension metadata for coordinate mappings

v2.0.60 (2025-12-18) ⭐

⭐ Background agents — Agents run while you work
--disable-slash-commands CLI flag
Model name in Co-Authored-By commits
/mcp enable|disable [server-name]

v2.0.51 (2025-12-10) ⭐ MAJOR

⭐ Opus 4.5 released
⭐ Claude Code for Desktop
Updated usage limits for Opus 4.5
Plan Mode builds more precise plans

v2.0.45 (2025-12-05) ⭐

⭐ Microsoft Foundry support
PermissionRequest hook for auto-approve/deny
& prefix for background tasks to web

v2.0.28 (2025-11-18) ⭐

⭐ Plan mode: introduced Plan subagent
Subagents: resume capability
Subagents: dynamic model selection
--max-budget-usd flag (SDK)
Git-based plugins branch/tag support (#branch)

v2.0.24 (2025-11-10)

Claude Code Web: Web → CLI teleport
Sandbox mode for BashTool (Linux & Mac)
Bedrock: awsAuthRefresh output display

Breaking Changes Summary

URLs

Version	Change
v2.1.0, v2.1.7	OAuth/API Console: `console.anthropic.com` → `platform.claude.com`

Windows

Version	Change
v2.0.58	Managed settings prefer `C:\Program Files\ClaudeCode`
v2.1.2	Deprecated `C:\ProgramData\ClaudeCode` path

SDK

Version	Change
v2.0.25	Removed legacy SDK entrypoint → `@anthropic-ai/claude-agent-sdk`
v2.1.0	Minimum zod peer dependency: `^4.0.0`

API Ecosystem

Date	Feature
2026-01-29	Structured Outputs GA: `output_config.format` remplace `output_format`. Docs

Shortcuts

Version	Change
v2.0.70	Removed `#` shortcut for quick memory entry

Security Fixes

Version	Issue
v2.1.2	Command injection in bash command processing
v2.1.6	Shell line continuation permission bypass
v2.1.7	Wildcard permission rules compound commands
v2.1.38	Heredoc delimiter command smuggling prevention

Syntax

Version	Change
v2.1.19	Indexed argument syntax changed: `$ARGUMENTS.0` → `$ARGUMENTS[0]` (bracket syntax)

Milestone Features

Version	Key Features
v2.1.69	InstructionsLoaded hook, 4 security fixes, 15+ memory fixes, Voice STT 20 languages
v2.1.68	ultrathink re-introduced, Opus 4.6 medium effort default, Opus 4/4.1 removed
v2.1.63	HTTP hooks, worktree config sharing, /simplify + /batch bundled commands
v2.1.32	Opus 4.6, Agent teams preview, Automatic memory
v2.1.18	Customizable keyboard shortcuts with /keybindings
v2.1.16	New task management system with dependency tracking
v2.1.0	Skill hot-reload, Shift+Enter OOTB, Vim motions, /plan command
v2.0.74	LSP tool for code intelligence
v2.0.72	Claude in Chrome (browser control)
v2.0.67	Thinking mode default for Opus 4.5
v2.0.64	Instant auto-compact, async agents, named sessions
v2.0.60	Background agents
v2.0.51	Opus 4.5, Claude Code for Desktop
v2.0.45	Microsoft Foundry, PermissionRequest hook
v2.0.28	Plan subagent, subagent resume/model selection
v2.0.24	Web teleport, Sandbox mode

Updating This Document

Watch: github.com/anthropics/claude-code/releases
Update: machine-readable/claude-code-releases.yaml (source of truth)
Regenerate: Update this markdown accordingly
Sync landing: Run ./scripts/check-landing-sync.sh

Last updated: 2026-03-05 | Back to main guide