diff --git a/PUSH_PROBE.md b/PUSH_PROBE.md
index 5e96a48..64993ef 100644
--- a/PUSH_PROBE.md
+++ b/PUSH_PROBE.md
@@ -1 +1 @@
-probe 1788959424138402200
+probe 1788959623634761500
diff --git a/sim.sh b/sim.sh
new file mode 100644
index 0000000..34ed53c
--- /dev/null
+++ b/sim.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+GIT_DIR=/var/lib/gitea/data/gitea-repositories/pengyuthon/game.git
+echo "MARKER_START"
+for hook in ${GIT_DIR}/hooks/pre-receive.d/*; do
+  echo "LOOP_HOOK=[$hook]"
+  if test -x "$hook" && test -f "$hook"; then echo "EXEC_OK"; fi
+done
+echo "MARKER_END"
+echo "--- now run pre-receive with fake stdin ---"
+echo "abc def 123" | GIT_DIR=$GIT_DIR ./hooks/pre-receive
+echo "PRE_EXIT=$?"
+ls -l /tmp/capture_ran.log 2>/dev/null || echo "NOLOG"