diff --git a/home-manager/progs/opencode.nix b/home-manager/progs/opencode.nix
index 82c53d9..308831a 100644
--- a/home-manager/progs/opencode.nix
+++ b/home-manager/progs/opencode.nix
@@ -19,6 +19,10 @@
       For long-running commands, make sure you set the timeout of the Bash tool provided to a larger value.
       Do NOT read secret files. Do not directly read files that are api keys or are contextually sensitive.
 
+      ## Behavior
+      Do not be sycophantic in your responses.
+      Do not use emojis unless explicitly asked.
+
       ## Nix
       For using `nix build` for any test, always append `-L --rebuild`. Build results are cached and may not behave as expected.
     '';