diff --git a/checkpoint.json b/checkpoint.json
index 093f97018..2e81b17f0 100644
--- a/checkpoint.json
+++ b/checkpoint.json
@@ -1,31 +1,38 @@
 {
-  "timestamp": "2026-03-16T12:02:24.936414Z",
-  "current_node": "setup",
+  "timestamp": "2026-03-16T12:05:06.301004Z",
+  "current_node": "solve",
   "completed_nodes": [
     "start",
-    "setup"
+    "setup",
+    "solve"
   ],
   "node_retries": {
     "setup": 1,
+    "solve": 1,
     "start": 1
   },
   "context_values": {
+    "internal.retry_count.solve": 1,
+    "last_response": "The fix is minimal and clean. Here's a summary of what was changed:\n\n**File: `astropy/io/ascii/rst.py`**\n\nTwo changes in the `RST` class:\n\n1. **`__init__`**: Added `header_rows=None` parameter and pas",
     "internal.retry_count.start": 1,
     "internal.run_id": "01KKV8D2S4BACBEM2MK24S393W",
-    "failure_signature": "setup|deterministic|script failed with exit code: <n> ## stdout fatal: destination path '.' already exists and is not an empty directory.",
+    "failure_signature": "",
     "command.stderr": "",
-    "internal.thread_id": "start",
+    "response.solve": "The fix is minimal and clean. Here's a summary of what was changed:\n\n**File: `astropy/io/ascii/rst.py`**\n\nTwo changes in the `RST` class:\n\n1. **`__init__`**: Added `header_rows=None` parameter and passed it through to the parent `FixedWidth.__init__()`. This allows the RST writer to accept the `header_rows` keyword argument (e.g., `header_rows=[\"name\", \"unit\"]`).\n\n2. **`write`**: Changed the hardcoded `lines[1]` index to `lines[idx]` where `idx = len(self.header.header_rows)`. Previously it assumed the `===` separator line was always at index 1 (valid only for the default single header row `[\"name\"]`). With multiple header rows, the separator line shifts to a later index — it's always right after all header rows, so its index equals the number of header rows.",
+    "internal.thread_id": "setup",
     "graph.goal": "Please support header rows in RestructuredText output\n### Description\r\n\r\nIt would be great if the following would work:\r\n\r\n```Python\r\n>>> from astropy.table import QTable\r\n>>> import astropy.units as u\r\n>>> import sys\r\n>>> tbl = QTable({'wave': [350,950]*u.nm, 'response': [0.7, 1.2]*u.count})\r\n>>> tbl.write(sys.stdout,  format=\"ascii.rst\")\r\n===== ========\r\n wave response\r\n===== ========\r\n350.0      0.7\r\n950.0      1.2\r\n===== ========\r\n>>> tbl.write(sys.stdout,  format=\"ascii.fixed_width\", header_rows=[\"name\", \"unit\"])\r\n|  wave | response |\r\n|    nm |       ct |\r\n| 350.0 |      0.7 |\r\n| 950.0 |      1.2 |\r\n>>> tbl.write(sys.stdout,  format=\"ascii.rst\", header_rows=[\"name\", \"unit\"])\r\nTraceback (most recent call last):\r\n  File \"<stdin>\", line 1, in <module>\r\n  File \"/usr/lib/python3/dist-packages/astropy/table/connect.py\", line 129, in __call__\r\n    self.registry.write(instance, *args, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/registry/core.py\", line 369, in write\r\n    return writer(data, *args, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/connect.py\", line 26, in io_write\r\n    return write(table, filename, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/ui.py\", line 856, in write\r\n    writer = get_writer(Writer=Writer, fast_writer=fast_writer, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/ui.py\", line 800, in get_writer\r\n    writer = core._get_writer(Writer, fast_writer, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/core.py\", line 1719, in _get_writer\r\n    writer = Writer(**writer_kwargs)\r\nTypeError: RST.__init__() got an unexpected keyword argument 'header_rows'\r\n```\r\n\r\n\r\n### Additional context\r\n\r\nRestructuredText output is a great way to fill autogenerated documentation with content, so having this flexible makes the life easier `:-)`\r\n\r\n\n",
-    "current.preamble": "Goal: Please support header rows in RestructuredText output\n### Description\r\n\r\nIt would be great if the following would work:\r\n\r\n```Python\r\n>>> from astropy.table import QTable\r\n>>> import astropy.units as u\r\n>>> import sys\r\n>>> tbl = QTable({'wave': [350,950]*u.nm, 'response': [0.7, 1.2]*u.count})\r\n>>> tbl.write(sys.stdout,  format=\"ascii.rst\")\r\n===== ========\r\n wave response\r\n===== ========\r\n350.0      0.7\r\n950.0      1.2\r\n===== ========\r\n>>> tbl.write(sys.stdout,  format=\"ascii.fixed_width\", header_rows=[\"name\", \"unit\"])\r\n|  wave | response |\r\n|    nm |       ct |\r\n| 350.0 |      0.7 |\r\n| 950.0 |      1.2 |\r\n>>> tbl.write(sys.stdout,  format=\"ascii.rst\", header_rows=[\"name\", \"unit\"])\r\nTraceback (most recent call last):\r\n  File \"<stdin>\", line 1, in <module>\r\n  File \"/usr/lib/python3/dist-packages/astropy/table/connect.py\", line 129, in __call__\r\n    self.registry.write(instance, *args, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/registry/core.py\", line 369, in write\r\n    return writer(data, *args, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/connect.py\", line 26, in io_write\r\n    return write(table, filename, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/ui.py\", line 856, in write\r\n    writer = get_writer(Writer=Writer, fast_writer=fast_writer, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/ui.py\", line 800, in get_writer\r\n    writer = core._get_writer(Writer, fast_writer, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/core.py\", line 1719, in _get_writer\r\n    writer = Writer(**writer_kwargs)\r\nTypeError: RST.__init__() got an unexpected keyword argument 'header_rows'\r\n```\r\n\r\n\r\n### Additional context\r\n\r\nRestructuredText output is a great way to fill autogenerated documentation with content, so having this flexible makes the life easier `:-)`\r\n\r\n\n\n",
-    "outcome": "fail",
+    "current.preamble": "Goal: Please support header rows in RestructuredText output\n### Description\r\n\r\nIt would be great if the following would work:\r\n\r\n```Python\r\n>>> from astropy.table import QTable\r\n>>> import astropy.units as u\r\n>>> import sys\r\n>>> tbl = QTable({'wave': [350,950]*u.nm, 'response': [0.7, 1.2]*u.count})\r\n>>> tbl.write(sys.stdout,  format=\"ascii.rst\")\r\n===== ========\r\n wave response\r\n===== ========\r\n350.0      0.7\r\n950.0      1.2\r\n===== ========\r\n>>> tbl.write(sys.stdout,  format=\"ascii.fixed_width\", header_rows=[\"name\", \"unit\"])\r\n|  wave | response |\r\n|    nm |       ct |\r\n| 350.0 |      0.7 |\r\n| 950.0 |      1.2 |\r\n>>> tbl.write(sys.stdout,  format=\"ascii.rst\", header_rows=[\"name\", \"unit\"])\r\nTraceback (most recent call last):\r\n  File \"<stdin>\", line 1, in <module>\r\n  File \"/usr/lib/python3/dist-packages/astropy/table/connect.py\", line 129, in __call__\r\n    self.registry.write(instance, *args, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/registry/core.py\", line 369, in write\r\n    return writer(data, *args, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/connect.py\", line 26, in io_write\r\n    return write(table, filename, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/ui.py\", line 856, in write\r\n    writer = get_writer(Writer=Writer, fast_writer=fast_writer, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/ui.py\", line 800, in get_writer\r\n    writer = core._get_writer(Writer, fast_writer, **kwargs)\r\n  File \"/usr/lib/python3/dist-packages/astropy/io/ascii/core.py\", line 1719, in _get_writer\r\n    writer = Writer(**writer_kwargs)\r\nTypeError: RST.__init__() got an unexpected keyword argument 'header_rows'\r\n```\r\n\r\n\r\n### Additional context\r\n\r\nRestructuredText output is a great way to fill autogenerated documentation with content, so having this flexible makes the life easier `:-)`\r\n\r\n\n\n\n## Completed stages\n- **setup**: fail\n  - Script: `git clone https://github.com/astropy/astropy.git . && git checkout a5917978be39d13cd90b517e1de4e7a539ffaa48 && sed -i 's/requires = \\[\"setuptools\",/requires = \\[\"setuptools==68.0.0\",/' pyproject.toml && python -m pip install -e .[test] --verbose`\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": "success",
     "command.output": "fatal: destination path '.' already exists and is not an empty directory.\n",
     "internal.node_visit_count": 1,
-    "failure_class": "deterministic",
+    "failure_class": "",
     "internal.fidelity": "compact",
+    "last_stage": "solve",
     "graph.rankdir": "LR",
-    "current_node": "setup",
+    "current_node": "solve",
     "internal.retry_count.setup": 1,
-    "thread.start.current_node": "setup"
+    "thread.start.current_node": "setup",
+    "thread.setup.current_node": "solve"
   },
   "logs": [],
   "node_outcomes": {
@@ -41,17 +48,40 @@
       },
       "duration_ms": 86
     },
+    "solve": {
+      "status": "success",
+      "context_updates": {
+        "response.solve": "The fix is minimal and clean. Here's a summary of what was changed:\n\n**File: `astropy/io/ascii/rst.py`**\n\nTwo changes in the `RST` class:\n\n1. **`__init__`**: Added `header_rows=None` parameter and passed it through to the parent `FixedWidth.__init__()`. This allows the RST writer to accept the `header_rows` keyword argument (e.g., `header_rows=[\"name\", \"unit\"]`).\n\n2. **`write`**: Changed the hardcoded `lines[1]` index to `lines[idx]` where `idx = len(self.header.header_rows)`. Previously it assumed the `===` separator line was always at index 1 (valid only for the default single header row `[\"name\"]`). With multiple header rows, the separator line shifts to a later index — it's always right after all header rows, so its index equals the number of header rows.",
+        "last_stage": "solve",
+        "last_response": "The fix is minimal and clean. Here's a summary of what was changed:\n\n**File: `astropy/io/ascii/rst.py`**\n\nTwo changes in the `RST` class:\n\n1. **`__init__`**: Added `header_rows=None` parameter and pas"
+      },
+      "notes": "Stage completed: solve",
+      "usage": {
+        "model": "claude-opus-4-6",
+        "input_tokens": 16844,
+        "output_tokens": 3545,
+        "cache_read_tokens": 205698,
+        "cache_write_tokens": 26083,
+        "reasoning_tokens": 286,
+        "cost": 0.518535
+      },
+      "files_touched": [
+        "/home/daytona/workspace/astropy/astropy/io/ascii/rst.py"
+      ],
+      "duration_ms": 158714
+    },
     "start": {
       "status": "success",
       "duration_ms": 0
     }
   },
-  "next_node_id": "solve",
+  "next_node_id": "extract_patch",
   "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
+    "setup": 1,
+    "solve": 1
   }
 }
\ No newline at end of file
diff --git a/nodes/solve/prompt.md b/nodes/solve/prompt.md
new file mode 100644
index 000000000..3461ac6ea
--- /dev/null
+++ b/nodes/solve/prompt.md
@@ -0,0 +1,63 @@
+Goal: Please support header rows in RestructuredText output
+### Description
+
+It would be great if the following would work:
+
+```Python
+>>> from astropy.table import QTable
+>>> import astropy.units as u
+>>> import sys
+>>> tbl = QTable({'wave': [350,950]*u.nm, 'response': [0.7, 1.2]*u.count})
+>>> tbl.write(sys.stdout,  format="ascii.rst")
+===== ========
+ wave response
+===== ========
+350.0      0.7
+950.0      1.2
+===== ========
+>>> tbl.write(sys.stdout,  format="ascii.fixed_width", header_rows=["name", "unit"])
+|  wave | response |
+|    nm |       ct |
+| 350.0 |      0.7 |
+| 950.0 |      1.2 |
+>>> tbl.write(sys.stdout,  format="ascii.rst", header_rows=["name", "unit"])
+Traceback (most recent call last):
+  File "<stdin>", line 1, in <module>
+  File "/usr/lib/python3/dist-packages/astropy/table/connect.py", line 129, in __call__
+    self.registry.write(instance, *args, **kwargs)
+  File "/usr/lib/python3/dist-packages/astropy/io/registry/core.py", line 369, in write
+    return writer(data, *args, **kwargs)
+  File "/usr/lib/python3/dist-packages/astropy/io/ascii/connect.py", line 26, in io_write
+    return write(table, filename, **kwargs)
+  File "/usr/lib/python3/dist-packages/astropy/io/ascii/ui.py", line 856, in write
+    writer = get_writer(Writer=Writer, fast_writer=fast_writer, **kwargs)
+  File "/usr/lib/python3/dist-packages/astropy/io/ascii/ui.py", line 800, in get_writer
+    writer = core._get_writer(Writer, fast_writer, **kwargs)
+  File "/usr/lib/python3/dist-packages/astropy/io/ascii/core.py", line 1719, in _get_writer
+    writer = Writer(**writer_kwargs)
+TypeError: RST.__init__() got an unexpected keyword argument 'header_rows'
+```
+
+
+### Additional context
+
+RestructuredText output is a great way to fill autogenerated documentation with content, so having this flexible makes the life easier `:-)`
+
+
+
+
+## Completed stages
+- **setup**: fail
+  - Script: `git clone https://github.com/astropy/astropy.git . && git checkout a5917978be39d13cd90b517e1de4e7a539ffaa48 && sed -i 's/requires = \["setuptools",/requires = \["setuptools==68.0.0",/' pyproject.toml && python -m pip install -e .[test] --verbose`
+  - Stdout:
+    ```
+    fatal: destination path '.' already exists and is not an empty directory.
+    ```
+  - Stderr: (empty)
+
+## Context
+- failure_class: deterministic
+- failure_signature: setup|deterministic|script failed with exit code: <n> ## stdout fatal: destination path '.' already exists and is not an empty directory.
+
+
+Fix this GitHub issue in the repository. Make the minimal code change needed.
\ No newline at end of file
diff --git a/nodes/solve/provider_used.json b/nodes/solve/provider_used.json
new file mode 100644
index 000000000..c1905ff10
--- /dev/null
+++ b/nodes/solve/provider_used.json
@@ -0,0 +1,5 @@
+{
+  "mode": "agent",
+  "provider": "anthropic",
+  "model": "claude-opus-4-6"
+}
\ No newline at end of file
diff --git a/nodes/solve/response.md b/nodes/solve/response.md
new file mode 100644
index 000000000..53bfa61d7
--- /dev/null
+++ b/nodes/solve/response.md
@@ -0,0 +1,9 @@
+The fix is minimal and clean. Here's a summary of what was changed:
+
+**File: `astropy/io/ascii/rst.py`**
+
+Two changes in the `RST` class:
+
+1. **`__init__`**: Added `header_rows=None` parameter and passed it through to the parent `FixedWidth.__init__()`. This allows the RST writer to accept the `header_rows` keyword argument (e.g., `header_rows=["name", "unit"]`).
+
+2. **`write`**: Changed the hardcoded `lines[1]` index to `lines[idx]` where `idx = len(self.header.header_rows)`. Previously it assumed the `===` separator line was always at index 1 (valid only for the default single header row `["name"]`). With multiple header rows, the separator line shifts to a later index — it's always right after all header rows, so its index equals the number of header rows.
\ No newline at end of file
diff --git a/nodes/solve/status.json b/nodes/solve/status.json
new file mode 100644
index 000000000..f53090ea5
--- /dev/null
+++ b/nodes/solve/status.json
@@ -0,0 +1,6 @@
+{
+  "status": "success",
+  "notes": "Stage completed: solve",
+  "failure_reason": null,
+  "timestamp": "2026-03-16T12:05:06.299767+00:00"
+}
\ No newline at end of file