diff --git a/.claude/scheduled_tasks.lock b/.claude/scheduled_tasks.lock
deleted file mode 100644
index 5504580e..00000000
--- a/.claude/scheduled_tasks.lock
+++ /dev/null
@@ -1 +0,0 @@
-{"sessionId":"905385c4-b13f-5091-96df-5752fb109cf5","pid":509,"procStart":"527","acquiredAt":1786922977672}
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 00b2441a..c83da244 100644
--- a/.gitignore
+++ b/.gitignore
@@ -311,3 +311,7 @@ v2/crates/wifi-densepose-sensing-server/data/
 # ADR-324: wasm-bindgen output for ruview-offaxis is generated locally
 # (see the crate README); never commit generated artifacts.
 v2/crates/ruview-offaxis/pkg/
+
+# Harness session-scheduler lock: per-session runtime state (session id + pid),
+# rewritten by every session; never useful in history.
+.claude/scheduled_tasks.lock