diff --git a/CHANGELOG.md b/CHANGELOG.md
index c6a95052..b083faa9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ All notable changes to this project will be documented in this file.
 
 - **Walkthrough:** a new guided walkthrough reorders a diff into a sequence of stops — the model groups related changes, explains what each one does, and orders them so each builds on the last. Start one from the Changes and pull-request views for uncommitted work, a branch against its base, or a pull request; nothing runs on its own.
 - **Mobile/Tablet:** reworked the tablet and foldable layout around the phone's navigation — a persistent resizable sessions sidebar on the left, the workspace (Changes, Files, Terminal, Notes, MCP) as a resizable right sidebar, and app pages like settings and instances shown as centered dialogs. An open diff, edited file, or attached terminal now survives rotation.
+- Performance: fixed Bun dependency chunking so the web app no longer downloads a single 18.5 MB vendor bundle at startup; heavy syntax highlighting, screenshot, diagram, editor, and image-conversion libraries now load only when needed (thanks to @makeittech).
 - Mobile/Android: pairing QR codes can now be scanned on devices without Google Play Services; the camera closes as soon as a code is recognized, followed by a connection-in-progress screen.
 - Mobile/Android: left and right drawer swipes can now start farther from the screen edge, outside Android's system Back gesture area.
 - Sessions: launching OpenChamber from a directory other than your project (for example your home folder) no longer produces repeated "not a git repository" errors that could stop sessions and projects from loading (thanks to @makeittech).