diff --git a/checkpoint.json b/checkpoint.json
index 5257636bc..75e58b92a 100644
--- a/checkpoint.json
+++ b/checkpoint.json
@@ -1,38 +1,55 @@
 {
-  "timestamp": "2026-03-16T12:08:14.371332Z",
-  "current_node": "solve",
+  "timestamp": "2026-03-16T12:08:16.841653Z",
+  "current_node": "extract_patch",
   "completed_nodes": [
     "start",
     "setup",
-    "solve"
+    "solve",
+    "extract_patch"
   ],
   "node_retries": {
+    "extract_patch": 1,
     "start": 1,
     "setup": 1,
     "solve": 4
   },
   "context_values": {
-    "current_node": "solve",
+    "current_node": "extract_patch",
     "command.stderr": "",
     "graph.rankdir": "LR",
     "internal.retry_count.start": 1,
     "thread.setup.current_node": "solve",
     "internal.run_id": "01KKV8NFKBR1W43BYB1RCFSYT3",
     "internal.node_visit_count": 1,
-    "failure_signature": "solve|transient_infra|api_transient|gemini|rate_limited",
+    "failure_signature": "",
     "thread.start.current_node": "setup",
     "internal.retry_count.setup": 1,
-    "failure_class": "transient_infra",
+    "failure_class": "",
     "graph.goal": "Correct expected format in invalid DurationField error message\nDescription\n\t\nIf you enter a duration \"14:00\" into a duration field, it translates to \"00:14:00\" which is 14 minutes.\nThe current error message for invalid DurationField says that this should be the format of durations: \"[DD] [HH:[MM:]]ss[.uuuuuu]\". But according to the actual behaviour, it should be: \"[DD] [[HH:]MM:]ss[.uuuuuu]\", because seconds are mandatory, minutes are optional, and hours are optional if minutes are provided.\nThis seems to be a mistake in all Django versions that support the DurationField.\nAlso the duration fields could have a default help_text with the requested format, because the syntax is not self-explanatory.\n",
-    "internal.thread_id": "setup",
-    "current.preamble": "Goal: Correct expected format in invalid DurationField error message\nDescription\n\t\nIf you enter a duration \"14:00\" into a duration field, it translates to \"00:14:00\" which is 14 minutes.\nThe current error message for invalid DurationField says that this should be the format of durations: \"[DD] [HH:[MM:]]ss[.uuuuuu]\". But according to the actual behaviour, it should be: \"[DD] [[HH:]MM:]ss[.uuuuuu]\", because seconds are mandatory, minutes are optional, and hours are optional if minutes are provided.\nThis seems to be a mistake in all Django versions that support the DurationField.\nAlso the duration fields could have a default help_text with the requested format, because the syntax is not self-explanatory.\n\n\n## Completed stages\n- **setup**: fail\n  - Script: `git clone https://github.com/django/django.git . && git checkout 17455e924e243e7a55e8a38f45966d8cbb27c273 && python -m pip install -e .`\n  - Stdout:\n    ```\n    fatal: destination path '.' already exists and is not an empty directory.\n    ```\n  - Stderr: (empty)\n\n## Context\n- failure_class: deterministic\n- failure_signature: setup|deterministic|script failed with exit code: <n> ## stdout fatal: destination path '.' already exists and is not an empty directory.\n",
-    "outcome": "fail",
-    "command.output": "fatal: destination path '.' already exists and is not an empty directory.\n",
+    "internal.thread_id": "solve",
+    "current.preamble": "Goal: Correct expected format in invalid DurationField error message\nDescription\n\t\nIf you enter a duration \"14:00\" into a duration field, it translates to \"00:14:00\" which is 14 minutes.\nThe current error message for invalid DurationField says that this should be the format of durations: \"[DD] [HH:[MM:]]ss[.uuuuuu]\". But according to the actual behaviour, it should be: \"[DD] [[HH:]MM:]ss[.uuuuuu]\", because seconds are mandatory, minutes are optional, and hours are optional if minutes are provided.\nThis seems to be a mistake in all Django versions that support the DurationField.\nAlso the duration fields could have a default help_text with the requested format, because the syntax is not self-explanatory.\n\n\n## Completed stages\n- **setup**: fail\n  - Script: `git clone https://github.com/django/django.git . && git checkout 17455e924e243e7a55e8a38f45966d8cbb27c273 && python -m pip install -e .`\n  - Stdout:\n    ```\n    fatal: destination path '.' already exists and is not an empty directory.\n    ```\n  - Stderr: (empty)\n- **solve**: fail\n\n## Context\n- failure_class: transient_infra\n- failure_signature: solve|transient_infra|api_transient|gemini|rate_limited\n",
+    "outcome": "success",
+    "thread.solve.current_node": "extract_patch",
+    "internal.retry_count.extract_patch": 1,
+    "command.output": "",
     "internal.retry_count.solve": 4,
     "internal.fidelity": "compact"
   },
   "logs": [],
   "node_outcomes": {
+    "start": {
+      "status": "success",
+      "duration_ms": 0
+    },
+    "extract_patch": {
+      "status": "success",
+      "context_updates": {
+        "command.stderr": "",
+        "command.output": ""
+      },
+      "notes": "Script completed: git diff",
+      "duration_ms": 29
+    },
     "solve": {
       "status": "fail",
       "failure": {
@@ -42,10 +59,6 @@
       },
       "duration_ms": 71865
     },
-    "start": {
-      "status": "success",
-      "duration_ms": 0
-    },
     "setup": {
       "status": "fail",
       "context_updates": {
@@ -59,13 +72,14 @@
       "duration_ms": 30
     }
   },
-  "next_node_id": "extract_patch",
+  "next_node_id": "exit",
   "loop_failure_signatures": {
     "setup|deterministic|script failed with exit code: <n> ## stdout fatal: destination path '.' already exists and is not an empty directory.": 1
   },
   "node_visits": {
     "start": 1,
     "setup": 1,
-    "solve": 1
+    "solve": 1,
+    "extract_patch": 1
   }
 }
\ No newline at end of file
diff --git a/nodes/extract_patch/script_invocation.json b/nodes/extract_patch/script_invocation.json
new file mode 100644
index 000000000..6d29afc80
--- /dev/null
+++ b/nodes/extract_patch/script_invocation.json
@@ -0,0 +1,5 @@
+{
+  "command": "git diff",
+  "language": "shell",
+  "timeout_ms": null
+}
\ No newline at end of file
diff --git a/nodes/extract_patch/script_timing.json b/nodes/extract_patch/script_timing.json
new file mode 100644
index 000000000..b335099bc
--- /dev/null
+++ b/nodes/extract_patch/script_timing.json
@@ -0,0 +1,5 @@
+{
+  "duration_ms": 29,
+  "exit_code": 0,
+  "timed_out": false
+}
\ No newline at end of file
diff --git a/nodes/extract_patch/status.json b/nodes/extract_patch/status.json
new file mode 100644
index 000000000..bad146623
--- /dev/null
+++ b/nodes/extract_patch/status.json
@@ -0,0 +1,6 @@
+{
+  "status": "success",
+  "notes": "Script completed: git diff",
+  "failure_reason": null,
+  "timestamp": "2026-03-16T12:08:16.841508+00:00"
+}
\ No newline at end of file