diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e2821fa..aa4e4874 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## 2.1.9
+
+- 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)
+
 ## 2.1.7
 
 - Added customizable keyboard shortcuts via `~/.claude/keybindings.json`. Run `/keybindings` to get started. Learn more at https://code.claude.com/docs/en/keybindings