diff --git a/checkpoint.json b/checkpoint.json
new file mode 100644
index 000000000..ee3ee50da
--- /dev/null
+++ b/checkpoint.json
@@ -0,0 +1,62 @@
+{
+  "timestamp": "2026-03-14T21:00:48.348343Z",
+  "current_node": "main",
+  "completed_nodes": [
+    "start",
+    "main"
+  ],
+  "node_retries": {
+    "start": 1,
+    "main": 1
+  },
+  "context_values": {
+    "internal.retry_count.main": 1,
+    "graph.goal": "Verify the sandbox can lint and test the project",
+    "last_response": "All commands have been run. Here's the summary:\n\n| # | Command | Result |\n|---|---------|--------|\n| 1 | `rustc --version && cargo --version` | ✅ **Pass** — rustc 1.94.0, cargo 1.94.0 |\n| 2 | `bun",
+    "failure_signature": "",
+    "outcome": "success",
+    "current_node": "main",
+    "graph.rankdir": "LR",
+    "internal.thread_id": "start",
+    "internal.node_visit_count": 1,
+    "last_stage": "main",
+    "thread.start.current_node": "main",
+    "internal.run_id": "01KKQ22K48EF3SSMWQV3RPS46T",
+    "internal.fidelity": "compact",
+    "response.main": "All commands have been run. Here's the summary:\n\n| # | Command | Result |\n|---|---------|--------|\n| 1 | `rustc --version && cargo --version` | ✅ **Pass** — rustc 1.94.0, cargo 1.94.0 |\n| 2 | `bun --version` | ✅ **Pass** — bun 1.3.10 |\n| 3 | `cargo fmt --check --all` | ✅ **Pass** — no formatting issues |\n| 4 | `cargo clippy --workspace -- -D warnings` | ✅ **Pass** — no warnings |\n| 5 | `cargo test --workspace` | ❌ **Fail** — 1 trycmd test failed (`cli_doctor`: `doctor/dry-run-flag.toml` expected exit 0, got exit 1) |\n| 6 | `bun install && bun run typecheck` | ✅ **Pass** — 1086 packages installed, typecheck clean |\n| 7 | `bun test` | ✅ **Pass** — 15 tests passed, 0 failed |\n\n**6 of 7 steps passed.** The sole failure is in `cargo test --workspace`: the `cli_doctor` trycmd snapshot test `tests/cmd/doctor/dry-run-flag.toml` expects the `fabro doctor` command to exit with code 0, but it exits with code 1 in this sandbox environment (likely because a doctor health check genuinely fails here — e.g., no LLM API keys configured). This is an environment-sensitive test, not a code defect.",
+    "internal.retry_count.start": 1,
+    "failure_class": "",
+    "current.preamble": "Goal: Verify the sandbox can lint and test the project\n"
+  },
+  "logs": [],
+  "node_outcomes": {
+    "start": {
+      "status": "success",
+      "duration_ms": 0
+    },
+    "main": {
+      "status": "success",
+      "context_updates": {
+        "response.main": "All commands have been run. Here's the summary:\n\n| # | Command | Result |\n|---|---------|--------|\n| 1 | `rustc --version && cargo --version` | ✅ **Pass** — rustc 1.94.0, cargo 1.94.0 |\n| 2 | `bun --version` | ✅ **Pass** — bun 1.3.10 |\n| 3 | `cargo fmt --check --all` | ✅ **Pass** — no formatting issues |\n| 4 | `cargo clippy --workspace -- -D warnings` | ✅ **Pass** — no warnings |\n| 5 | `cargo test --workspace` | ❌ **Fail** — 1 trycmd test failed (`cli_doctor`: `doctor/dry-run-flag.toml` expected exit 0, got exit 1) |\n| 6 | `bun install && bun run typecheck` | ✅ **Pass** — 1086 packages installed, typecheck clean |\n| 7 | `bun test` | ✅ **Pass** — 15 tests passed, 0 failed |\n\n**6 of 7 steps passed.** The sole failure is in `cargo test --workspace`: the `cli_doctor` trycmd snapshot test `tests/cmd/doctor/dry-run-flag.toml` expects the `fabro doctor` command to exit with code 0, but it exits with code 1 in this sandbox environment (likely because a doctor health check genuinely fails here — e.g., no LLM API keys configured). This is an environment-sensitive test, not a code defect.",
+        "last_stage": "main",
+        "last_response": "All commands have been run. Here's the summary:\n\n| # | Command | Result |\n|---|---------|--------|\n| 1 | `rustc --version && cargo --version` | ✅ **Pass** — rustc 1.94.0, cargo 1.94.0 |\n| 2 | `bun"
+      },
+      "notes": "Stage completed: main",
+      "usage": {
+        "model": "claude-opus-4-6",
+        "input_tokens": 10058,
+        "output_tokens": 1317,
+        "cache_read_tokens": 43511,
+        "cache_write_tokens": 14106,
+        "reasoning_tokens": 69,
+        "cost": 0.249645
+      },
+      "duration_ms": 354284
+    }
+  },
+  "next_node_id": "exit",
+  "node_visits": {
+    "start": 1,
+    "main": 1
+  }
+}
\ No newline at end of file
diff --git a/nodes/main/prompt.md b/nodes/main/prompt.md
new file mode 100644
index 000000000..b159cee54
--- /dev/null
+++ b/nodes/main/prompt.md
@@ -0,0 +1,14 @@
+Goal: Verify the sandbox can lint and test the project
+
+
+Run each of these commands in order and report the results. If any command fails, continue running the rest and report all results at the end.
+
+1. rustc --version && cargo --version
+2. bun --version
+3. cargo fmt --check --all
+4. cargo clippy --workspace -- -D warnings
+5. cargo test --workspace
+6. cd apps/fabro-web && bun install && bun run typecheck
+7. cd apps/fabro-web && bun test
+
+Report a summary table of pass/fail for each step.
\ No newline at end of file
diff --git a/nodes/main/provider_used.json b/nodes/main/provider_used.json
new file mode 100644
index 000000000..c1905ff10
--- /dev/null
+++ b/nodes/main/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/main/response.md b/nodes/main/response.md
new file mode 100644
index 000000000..3ac202d97
--- /dev/null
+++ b/nodes/main/response.md
@@ -0,0 +1,13 @@
+All commands have been run. Here's the summary:
+
+| # | Command | Result |
+|---|---------|--------|
+| 1 | `rustc --version && cargo --version` | ✅ **Pass** — rustc 1.94.0, cargo 1.94.0 |
+| 2 | `bun --version` | ✅ **Pass** — bun 1.3.10 |
+| 3 | `cargo fmt --check --all` | ✅ **Pass** — no formatting issues |
+| 4 | `cargo clippy --workspace -- -D warnings` | ✅ **Pass** — no warnings |
+| 5 | `cargo test --workspace` | ❌ **Fail** — 1 trycmd test failed (`cli_doctor`: `doctor/dry-run-flag.toml` expected exit 0, got exit 1) |
+| 6 | `bun install && bun run typecheck` | ✅ **Pass** — 1086 packages installed, typecheck clean |
+| 7 | `bun test` | ✅ **Pass** — 15 tests passed, 0 failed |
+
+**6 of 7 steps passed.** The sole failure is in `cargo test --workspace`: the `cli_doctor` trycmd snapshot test `tests/cmd/doctor/dry-run-flag.toml` expects the `fabro doctor` command to exit with code 0, but it exits with code 1 in this sandbox environment (likely because a doctor health check genuinely fails here — e.g., no LLM API keys configured). This is an environment-sensitive test, not a code defect.
\ No newline at end of file
diff --git a/nodes/main/status.json b/nodes/main/status.json
new file mode 100644
index 000000000..b9be37f25
--- /dev/null
+++ b/nodes/main/status.json
@@ -0,0 +1,6 @@
+{
+  "status": "success",
+  "notes": "Stage completed: main",
+  "failure_reason": null,
+  "timestamp": "2026-03-14T21:00:48.347908+00:00"
+}
\ No newline at end of file
diff --git a/nodes/start/status.json b/nodes/start/status.json
new file mode 100644
index 000000000..9e7372898
--- /dev/null
+++ b/nodes/start/status.json
@@ -0,0 +1,6 @@
+{
+  "status": "success",
+  "notes": null,
+  "failure_reason": null,
+  "timestamp": "2026-03-14T20:54:54.065565+00:00"
+}
\ No newline at end of file