diff --git a/.claude/scheduled_tasks.lock b/.claude/scheduled_tasks.lock
deleted file mode 100644
index 5483ed6..0000000
--- a/.claude/scheduled_tasks.lock
+++ /dev/null
@@ -1 +0,0 @@
-{"sessionId":"de029a55-31d3-41c9-b62a-0fa17789202c","pid":31042,"procStart":"9453895","acquiredAt":1779827176270}
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index b114f2f..8320255 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,6 @@ runs/
 # nix
 result
 result-*
+
+# harness/loop artifacts
+.claude/