diff --git a/CLAUDE.md b/CLAUDE.md
index 746e236..21c7a20 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -18,6 +18,7 @@ IMPORTANT: At the start of every session, do the following before responding to
 - `books/Adventures/` contains the campaign adventure PDFs
 - When a rule is unclear, look it up before making a ruling. Quote the source if possible.
 - Do NOT invent rules. If you cannot find a rule, say so and suggest a fair houserule.
+- Whenever a skill check, attack roll, etc. is required from the players, always give the DC needed to pass.
 
 ## Dice Rolling