diff --git a/AGENTS.md b/AGENTS.md
index 58b0eab..2c0d704 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -2,6 +2,8 @@
 
 Use **only English** for code, comments, documentation, and commits.
 For conversations use the user's preferred language.
+The project name is always spelled `ptfkit` in lowercase
+Use this spelling exclusively in all generated content.
 
 When in doubt, stop and ask for clarification. Do not act without being
 completely sure.