diff --git a/.gitignore b/.gitignore
index 94a9815..a81dbd0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,6 +44,7 @@ htmlcov/
 .coverage
 .coverage.*
 .cache
+/canon/architecture/.ast_cache/
 nosetests.xml
 coverage.xml
 *.cover
@@ -193,4 +194,3 @@ state-hub/kubectl
 
 # Local agent definition backups (migration artifacts)
 agents_backup_*/
-