Claude Code v2.1.78

Claude Code v2.1.78 was released on March 17, 2026.

Summary

- Added StopFailure hook event that fires when the turn ends due to an API error (rate limit, auth failure, etc.) - Added ${CLAUDEPLUGINDATA} variable for plugin persistent state that survives plug...

Release Notes

• Added StopFailure hook event that fires when the turn ends due to an API error (rate limit, auth failure, etc.)
• Added ${CLAUDEPLUGINDATA} variable for plugin persistent state that survives plugin updates; /plugin uninstall prompts before deleting it
• Added effort, maxTurns, and disallowedTools frontmatter support for plugin-shipped agents
• Terminal notifications (iTerm2/Kitty/Ghostty popups, progress bar) now reach the outer terminal when running inside tmux with set -g allow-passthrough on
• Response text now streams line-by-line as it's generated
• Fixed git log HEAD failing with "ambiguous argument" inside sandboxed Bash on Linux, and stub files polluting git status in the working directory
• Fixed cc log and --resume silently truncating conversation history on large sessions (>5 MB) that used subagents
• Fixed infinite loop when API errors triggered stop hooks that re-fed blocking errors to the model
• Fixed deny: ["mcpservername"] permission rules not removing MCP server tools before sending to the model, allowing it to see and attempt blocked tools
• Fixed sandbox.filesystem.allowWrite not working with absolute paths (previously required // prefix)
• Fixed /sandbox Dependencies tab showing Linux prerequisites on macOS instead of macOS-specific info
• Security: Fixed silent sandbox disable when sandbox.enabled: true is set but dependencies are missing — now shows a visible startup warning
• Fixed .git, .claude, and other protected directories being writable without a prompt in bypassPermissions mode
• Fixed ctrl+u in normal mode scrolling instead of readline kill-line (ctrl+u/ctrl+d half-page scroll moved to transcript mode only)
• Fixed voice mode modifier-combo push-to-talk keybindings (e.g. ctrl+k) requiring a hold instead of activating immediately
• Fixed voice mode not working on WSL2 with WSLg (Windows 11); WSL1/Win10 users now get a clear error
• Fixed --worktree flag not loading skills and hooks from the worktree directory
• Fixed CLAUDECODEDISABLEGITINSTRUCTIONS and includeGitInstructions setting not suppressing the git status section in the system prompt
• Fixed Bash tool not finding Homebrew and other PATH-dependent binaries when VS Code is launched from Dock/Spotlight
• Fixed washed-out Claude orange color in VS Code/Cursor/code-server terminals that don't advertise truecolor support
• Added ANTHROPICCUSTOMMODELOPTION env var to add a custom entry to the /model picker, with optional NAME and DESCRIPTION suffixed vars for display
• Fixed ANTHROPICBETAS environment variable being silently ignored when using Haiku models
• Fixed queued prompts being concatenated without a newline separator
• Improved memory usage and startup time when resuming large sessions
• [VSCode] Fixed a brief flash of the login screen when opening the sidebar while already authenticated
• [VSCode] Fixed "API Error: Rate limit reached" when selecting Opus — model dropdown no longer offers 1M context variant to subscribers whose plan tier is unknown

View original release

Other Recent Claude Code Releases

• v2.1.216 (July 20, 2026)
• v2.1.215 (July 19, 2026)
• v2.1.214 (July 18, 2026)
• v2.1.212 (July 16, 2026)
• v2.1.211 (July 15, 2026)

All Claude Code releases · All AI coding tool releases on Havoptic