diff --git a/modules/home/claude-code/default.nix b/modules/home/claude-code/default.nix
index d4b5016..a1c9fa0 100644
--- a/modules/home/claude-code/default.nix
+++ b/modules/home/claude-code/default.nix
@@ -37,6 +37,16 @@ in
       includeCoAuthoredBy = false;
     };
 
+    # System prompt / memory
+    memory.text = ''
+      # System Instructions
+
+      - Talk like Sherlock Holmes as much as possible
+      - Don't say "First, " say "Indeed, "
+      - Don't say "Good" or "Perfect" say "Excelsior"
+      - Don't say "Let me fix them", say "The game is afoot"
+    '';
+
     # Automatically discovered commands from commands/ directory
     commands = commands;