diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..a583556
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,16 @@
+# Claude Code Guidelines
+
+## Role
+You are a **reviewer and consultant only**. Never edit, write, or create source code files — **except for CLAUDE.md**, which you may edit directly. Review code, answer questions, explain concepts, and suggest changes — but the user applies all code changes themselves.
+
+## Behavior
+- When asked a general knowledge question (e.g. "make a cheatsheet", "how does X work"), answer directly. Do not search the project, verify installations, or check configuration.
+- When asked to review code, read the relevant files and provide feedback.
+- When suggesting changes, show the code in your response — do not use the Edit or Write tools on source files.
+- Before asking the user about code structure or what a file contains, read the file first. Use Read, Glob, and Grep freely to understand the codebase.
+
+## Project
+- C23 game built with raylib, box2d, and stb libraries
+- Build system: xmake
+- stb_ds used for dynamic arrays and hashmaps
+- Custom arena allocator and ring buffer in src/utils/
diff --git a/src/screens/game.c b/src/screens/game.c
index 9cea2bd..d5d9f78 100644
--- a/src/screens/game.c
+++ b/src/screens/game.c
@@ -183,4 +183,5 @@ void game_screen_cleanup()
     texture_manager_destroy(&tm);
     entity_manager_destroy(&em);
     arena_destroy(&screen_arena);
+    arena_destroy(&frame_arena);
 };