v2.1.78

claude codetue, mar 17, 2026, 9:04 pm utc

original release ↗

sandboxing vs code hooks plugins models subagents mcp permissions

+3 more

keybindings settings memory

+new 4

Added StopFailure hook event that fires when the turn ends due to an API error (rate limit, auth failure, etc.)
Added ${CLAUDE_PLUGIN_DATA} 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
Added ANTHROPIC_CUSTOM_MODEL_OPTION env var to add a custom entry to the `/model` picker, with optional `_NAME` and `_DESCRIPTION` suffixed vars for display

~changed 3

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
**Security:** Fixed silent sandbox disable when `sandbox.enabled: true` is set but dependencies are missing — now shows a visible startup warning

↑improved 1

Improved memory usage and startup time when resuming large sessions

✓fixed 18

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: ["mcp__servername"] 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
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 CLAUDE_CODE_DISABLE_GIT_INSTRUCTIONS 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
Fixed ANTHROPIC_BETAS environment variable being silently ignored when using Haiku models
Fixed queued prompts being concatenated without a newline separator
VSCodeFixed a brief flash of the login screen when opening the sidebar while already authenticated
VSCodeFixed "API Error: Rate limit reached" when selecting Opus — model dropdown no longer offers 1M context variant to subscribers whose plan tier is unknown