diff --git a/checkpoint.json b/checkpoint.json
new file mode 100644
index 000000000..6d56321d2
--- /dev/null
+++ b/checkpoint.json
@@ -0,0 +1,47 @@
+{
+  "timestamp": "2026-04-01T14:11:22.343977Z",
+  "current_node": "toolchain",
+  "completed_nodes": [
+    "start",
+    "toolchain"
+  ],
+  "node_retries": {},
+  "context_values": {
+    "internal.run_id": "01KN4P4HZ41BRWZSJDN447CC96",
+    "failure_class": "",
+    "internal.thread_id": "start",
+    "command.output": "rustc 1.94.0 (4a4ef493e 2026-03-02)\ncargo 1.94.0 (85eff7c80 2026-01-15)\n1.3.10\n",
+    "internal.retry_count.start": 0,
+    "internal.retry_count.toolchain": 0,
+    "thread.start.current_node": "toolchain",
+    "current_node": "toolchain",
+    "current.preamble": "Goal: Verify the sandbox can lint and test the project\n",
+    "failure_signature": "",
+    "outcome": "success",
+    "graph.rankdir": "LR",
+    "internal.fidelity": "compact",
+    "graph.goal": "Verify the sandbox can lint and test the project",
+    "internal.node_visit_count": 1,
+    "command.stderr": ""
+  },
+  "node_outcomes": {
+    "start": {
+      "status": "success",
+      "usage": null
+    },
+    "toolchain": {
+      "status": "success",
+      "context_updates": {
+        "command.output": "rustc 1.94.0 (4a4ef493e 2026-03-02)\ncargo 1.94.0 (85eff7c80 2026-01-15)\n1.3.10\n",
+        "command.stderr": ""
+      },
+      "notes": "Script completed: rustc --version && cargo --version && bun --version 2>&1",
+      "usage": null
+    }
+  },
+  "next_node_id": "compile_rust",
+  "node_visits": {
+    "toolchain": 1,
+    "start": 1
+  }
+}
\ No newline at end of file
diff --git a/nodes/start/status.json b/nodes/start/status.json
new file mode 100644
index 000000000..4ecb80804
--- /dev/null
+++ b/nodes/start/status.json
@@ -0,0 +1,6 @@
+{
+  "status": "success",
+  "notes": null,
+  "failure_reason": null,
+  "timestamp": "2026-04-01T14:11:21.835474Z"
+}
\ No newline at end of file
diff --git a/nodes/toolchain/script_invocation.json b/nodes/toolchain/script_invocation.json
new file mode 100644
index 000000000..20f1112a0
--- /dev/null
+++ b/nodes/toolchain/script_invocation.json
@@ -0,0 +1,5 @@
+{
+  "command": "rustc --version && cargo --version && bun --version 2>&1",
+  "language": "shell",
+  "timeout_ms": null
+}
\ No newline at end of file
diff --git a/nodes/toolchain/script_timing.json b/nodes/toolchain/script_timing.json
new file mode 100644
index 000000000..fbadea740
--- /dev/null
+++ b/nodes/toolchain/script_timing.json
@@ -0,0 +1,5 @@
+{
+  "duration_ms": 467,
+  "exit_code": 0,
+  "timed_out": false
+}
\ No newline at end of file
diff --git a/nodes/toolchain/status.json b/nodes/toolchain/status.json
new file mode 100644
index 000000000..f74719876
--- /dev/null
+++ b/nodes/toolchain/status.json
@@ -0,0 +1,6 @@
+{
+  "status": "success",
+  "notes": "Script completed: rustc --version && cargo --version && bun --version 2>&1",
+  "failure_reason": null,
+  "timestamp": "2026-04-01T14:11:22.338102Z"
+}
\ No newline at end of file