docs: add Git LFS & Xet setup instructions to README

README.md

@@ -93,6 +93,24 @@ ln -sf dist/codev ~/.local/bin/codev
 # then can use Codev in everywhere after `/login`
 ```
 
+### Git LFS & Xet (faster large-file transfer)
+
+Asset files (images, screenshots) are tracked via Git LFS.
+Install the **git-xet** custom transfer agent to replace the standard LFS protocol with
+Xet's chunk-dedup transport for much faster push/pull:
+
+```bash
+curl --proto '=https' --tlsv1.2 -sSf \
+  https://raw.githubusercontent.com/huggingface/xet-core/refs/heads/main/git_xet/install.sh | sh
+git xet install
+```
+
+After setup, use normal git workflow — `git-xet` automatically handles LFS objects:
+
+```bash
+git lfs pull   # download all large files
+```
+
 ## 🚀 Quick Start
 
 > [!IMPORTANT]