diff --git a/profiles/opencode.nix b/profiles/opencode.nix
index 4f01b5d..2718f06 100644
--- a/profiles/opencode.nix
+++ b/profiles/opencode.nix
@@ -71,6 +71,14 @@
 			source = ./opencode/plugin;
 			recursive = true;
 		};
+		"opencode/AGENTS.md".text = ''
+			# Global AGENTS.md
+
+			## Version Control
+
+			- Use `jj` for VCS, not `git`
+			- `jj tug` is an alias for `jj bookmark move --from closest_bookmark(@-) --to @-`
+		'';
 		"opencode/oh-my-opencode.json".text =
 			builtins.toJSON {
 				"$schema" = "https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json";