•Added auto:N syntax for configuring the MCP tool search auto-enable threshold, where N is the context window percentage (0-100)
•Added plansDirectory setting 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 PreToolUse hooks to return additionalContext to the model
•Added ${CLAUDE_SESSION_ID} string substitution for skills to access the current session ID

Fixed3 changes

•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)

v2.1.9Claude Code Release NotesJan 16, 2026

Feature release with 6 new features and 3 fixes.

Total Changes

Days Since Previous Release

Version Type

Patch

Release Focus

Features

Category Breakdown

Added (6)

Fixed (3)

•Added auto:N syntax for configuring the MCP tool search auto-enable threshold, where N is the context window percentage (0-100)
•Added plansDirectory setting 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 PreToolUse hooks to return additionalContext to 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)