diff --git a/agents/BP3j-Uz4t-git-harden-sh-00eb/events.log b/agents/BP3j-Uz4t-git-harden-sh-00eb/events.log
new file mode 100644
index 0000000..e17dd7a
--- /dev/null
+++ b/agents/BP3j-Uz4t-git-harden-sh-00eb/events.log
@@ -0,0 +1 @@
+{"agent_id":"BP3j-Uz4t-git-harden-sh-00eb","agent_seq":1,"timestamp":"2026-03-27T17:10:32.652172Z","event":{"type":"LockClaimed","issue_display_id":4}}
diff --git a/checkpoint/state.json b/checkpoint/state.json
index bf39b01..cfad307 100644
--- a/checkpoint/state.json
+++ b/checkpoint/state.json
@@ -2,18 +2,23 @@
   "next_display_id": 1,
   "next_comment_id": 1,
   "display_id_map": {},
-  "locks": {},
+  "locks": {
+    "4": {
+      "agent_id": "BP3j-Uz4t-git-harden-sh-00eb",
+      "claimed_at": "2026-03-27T17:10:32.652172Z"
+    }
+  },
   "issues": {},
   "unsigned_event_warnings": [
     {
-      "agent_id": "BP3j-2A5y-git-harden-sh-design-spec-216a",
-      "agent_seq": 2,
-      "timestamp": "2026-03-27T17:06:47.222959Z"
+      "agent_id": "BP3j-Uz4t-git-harden-sh-00eb",
+      "agent_seq": 1,
+      "timestamp": "2026-03-27T17:10:32.652172Z"
     }
   ],
   "watermark": {
-    "timestamp": "2026-03-27T17:06:47.222959Z",
-    "agent_id": "BP3j-2A5y-git-harden-sh-design-spec-216a",
-    "agent_seq": 2
+    "timestamp": "2026-03-27T17:10:32.652172Z",
+    "agent_id": "BP3j-Uz4t-git-harden-sh-00eb",
+    "agent_seq": 1
   }
 }
\ No newline at end of file
diff --git a/locks/4.json b/locks/4.json
new file mode 100644
index 0000000..ba4a02b
--- /dev/null
+++ b/locks/4.json
@@ -0,0 +1,5 @@
+{
+  "issue_id": 4,
+  "agent_id": "BP3j-Uz4t-git-harden-sh-00eb",
+  "claimed_at": "2026-03-27T17:10:32.652172Z"
+}
\ No newline at end of file