diff --git a/heartbeats/BP3j-2A5y-git-harden-sh-design-spec-216a.json b/heartbeats/BP3j-2A5y-git-harden-sh-design-spec-216a.json
new file mode 100644
index 0000000..105595d
--- /dev/null
+++ b/heartbeats/BP3j-2A5y-git-harden-sh-design-spec-216a.json
@@ -0,0 +1,6 @@
+{
+  "agent_id": "BP3j-2A5y-git-harden-sh-design-spec-216a",
+  "last_heartbeat": "2026-03-27T17:05:36.158580Z",
+  "active_issue_id": null,
+  "machine_id": "MacBook-Air-4.local"
+}
\ No newline at end of file