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AI summary
Written by AI from the official notes. Check them for exact details.Claude Code 2.1.9 introduces new configuration options and fixes several bugs.
- Added
auto:Nsyntax for MCP tool search configuration. - Introduced
plansDirectorysetting for plan file storage. - Enabled external editor support in AskUserQuestion input.
- Session URL attribution added to commits and PRs.
- Support for
PreToolUsehooks to returnadditionalContext.
Why it matters: Developers using Claude tools should update to utilize new features and improvements.
Full release notes9 changes
What's changed
- Added
auto:Nsyntax for configuring the MCP tool search auto-enable threshold, where N is the context window percentage (0-100) - Added
plansDirectorysetting to customize where plan files are stored - Added external editor support (Ctrl+G) in AskUserQuestion "Other" input field
- Added session URL attribution to commits and PRs created from web sessions
- Added support for
PreToolUsehooks to returnadditionalContextto the model - Added
${CLAUDE_SESSION_ID}string substitution for skills to access the current session ID - Fixed long sessions with parallel tool calls failing with an API error about orphan tool_result blocks
- Fixed MCP server reconnection hanging when cached connection promise never resolves
- Fixed Ctrl+Z suspend not working in terminals using Kitty keyboard protocol (Ghostty, iTerm2, kitty, WezTerm)