diff --git a/tools/sizelint b/tools/sizelint
index b0828391..91126894 100755
--- a/tools/sizelint
+++ b/tools/sizelint
@@ -33,6 +33,7 @@ files=$(find cmd selfhost lib \
 	\( -type d -name .git -prune \) -o \
 	\( -type d -name .claude -prune \) -o \
 	\( -type d -name .ai -prune \) -o \
+	\( -type d -name '*.sepwork' -prune \) -o \
 	\( -type f \( -name '*.c' -o -name '*.h' -o -name '*.ww' \) \
 		! -name '*.combined.ww' -print \) )