diff --git a/run.json b/run.json
index bfcefea80..21c0b5711 100644
--- a/run.json
+++ b/run.json
@@ -505,7 +505,7 @@
     "kind": "running"
   },
   "status_updated_at": "2026-05-27T02:03:08.681266Z",
-  "last_event_at": "2026-05-27T02:03:11.313301Z",
+  "last_event_at": "2026-05-27T02:03:16.573049Z",
   "pending_control": null,
   "checkpoints": [
     {
@@ -546,9 +546,9 @@
       "diff": {}
     },
     {
-      "seq": 0,
+      "seq": 29,
       "checkpoint": {
-        "timestamp": "2026-05-27T02:03:12.694221Z",
+        "timestamp": "2026-05-27T02:03:16.571426Z",
         "current_node": "toolchain",
         "completed_nodes": [
           "start",
@@ -556,7 +556,71 @@
         ],
         "node_retries": {},
         "context_values": {
+          "failure_signature": "",
+          "graph.model_stylesheet": "\n            * { model: claude-opus-4-7; }\n        ",
+          "command.output": "blob://sha256/fc14b2ba2d770e5cd3169df7a29525c962adfc4cfa3097b9098c63ebd61a748c",
+          "failure_class": "",
           "internal.thread_id": "start",
+          "internal.run_id": "01KSKJQ9FMRRBBNQW12S4A3HYJ",
+          "internal.work_dir": "/home/daytona/workspace/fabro",
+          "internal.retry_count.toolchain": 0,
+          "current_node": "toolchain",
+          "internal.node_visit_count": 1,
+          "graph.rankdir": "LR",
+          "graph.goal": "# Replace DIY overlay primitives in fabro-web\n\n## Context\n\n`apps/fabro-web` hand-rolls Tooltip, HoverCard, and a Toast system. ~285 lines of overlay code with weak collision detection, no keyboard a11y on the CSS-only tooltips, and a custom Toast context that no longer earns its complexity. Already on `@headlessui/react` for Dialog/Menu — Headless doesn't ship Tooltip/HoverCard/Toast, so this is a real gap, not redundancy.\n\nGoal: delete the DIY code, gain real a11y/positioning, keep call sites stable.\n\n## Scope (3 areas)\n\n### 1. Tooltip + HoverCard → Radix wrappers\n\nAdd `@radix-ui/react-tooltip` and `@radix-ui/react-hover-card`.\n\nKeep the public API (`<Tooltip label={x}>{children}</Tooltip>`, `<HoverCard content={x}>{children}</HoverCard>`) by reimplementing the two components in `app/components/ui.tsx` as thin Radix wrappers. All 13 existing call sites remain unchanged.\n\n- Delete `useHoverAnchor` (ui.tsx:141-179).\n- Mount one `TooltipProvider` in `app/layouts/app-shell.tsx` (delay 200, skipDelayDuration 300) so siblings share a delay group.\n- HoverCard wrapper passes `openDelay` (default 0, stage-sidebar still passes 200) → Radix `openDelay`.\n- Keep `PopoverHeader` / `PopoverRows` / `PopoverRow` unchanged — presentational, used inside HoverCard `content`.\n\nCall sites (do not touch): `run-billing`, `settings-live-events`, `run-sandbox/{services,vnc,filesystem}-panel`, `terminal-view`, `size-chip`, `run-summary-panel`, `event-debug` (Tooltip wrapper use), `meta-bar`, `human-qa`, `run-table-row`, `run-waterfall`, `stage-sidebar`, `run-stages`, `run-detail/header`.\n\n### 2. Toast system → Sonner\n\nAdd `sonner`. Mount `<Toaster richColors position=\"bottom-right\" />` in `app/layouts/app-shell.tsx` next to the new `TooltipProvider`.\n\nReplace `app/components/toast.tsx` with a tiny shim that preserves the current API:\n```ts\n// useToast() returns { push, dismiss, clear }\n// push({ message, tone, autoDismissMs }) → toast(msg) / toast.error(msg) / toast(msg, { duration })\n```\nKeep the shim so the 10 consumers + `useRunToasts` need zero changes. `action` field unused in production — drop from the type (only the test referenced it).\n\nRewrite `toast.test.tsx` against the shim's observable behavior (rendered text, error persistence) rather than `data-toast-id`. Other tests that wrap in `<ToastProvider>` keep working because the shim re-exports a no-op `ToastProvider` (sonner's `Toaster` is mounted globally).\n\n### 3. CSS-only tooltips → real Tooltip\n\nReplace the inline `group-hover/*` blocks in `app/routes/settings-models.tsx` (test-error message ~L519, alias list ~L545) with the new `<Tooltip label={...}>` wrapper. Gains keyboard focus + Esc dismiss + collision avoidance.\n\n### 4. SVG-anchored hovers → shared `FloatingTooltip` helper\n\nTwo sites anchor to a measured `DOMRect` from SVG/Graphviz output (no wrappable trigger element): `app/routes/run-overview.tsx:303-318` and `app/components/event-debug.tsx:423-432` (+ the thread-DNA one near :639).\n\nExtract a single helper in `app/components/floating-tooltip.tsx`:\n```ts\nfunction FloatingTooltip({ rect, placement, children }) // portals to body, applies collision-avoiding style\n```\nAbsorb the logic of `hover-card-style.ts` into it (cover `top`/`bottom` placements). Delete `app/components/hover-card-style.ts`. Both sites use the helper; `run-overview` renders `<StagePopover>` inside.\n\n## Files to modify\n\nModify:\n- `app/components/ui.tsx` — replace Tooltip/HoverCard impls; delete useHoverAnchor\n- `app/components/toast.tsx` — shrink to ~30-line sonner shim\n- `app/components/toast.test.tsx` — rewrite assertions\n- `app/layouts/app-shell.tsx` — mount `TooltipProvider` + sonner `<Toaster />`, drop `<ToastProvider>`\n- `app/routes/settings-models.tsx` — swap two inline CSS tooltips for `<Tooltip>`\n- `app/routes/run-overview.tsx` — use `FloatingTooltip`\n- `app/components/event-debug.tsx` — use `FloatingTooltip` (two call sites)\n- `apps/fabro-web/package.json` — add `@radix-ui/react-tooltip`, `@radix-ui/react-hover-card`, `sonner`\n\nCreate:\n- `app/components/floating-tooltip.tsx`\n\nDelete:\n- `app/components/hover-card-style.ts`\n\n## Verification\n\n1. `cd apps/fabro-web && bun run typecheck` — no type errors.\n2. `cd apps/fabro-web && bun test` — `toast.test.tsx` passes against new shim; all other tests unchanged.\n3. Run dev locally (`fabro server start` + `cd apps/fabro-web && bun run dev`) and exercise:\n   - Tooltips: hover the refresh button on `/runs/:id/sandbox/services`, status chip on `/runs/:id/billing`, run-table-row status icons. Confirm hover delay (~200ms shared), Esc dismisses, keyboard focus opens.\n   - HoverCards: hover stage rows in the stage sidebar, waterfall rows, and the run-detail header chips. Confirm positioning flips near viewport edges (Radix collision detection).\n   - Toasts: trigger a failed `/runs/:id` action (e.g. retry an unretryable run), confirm red toast persists; trigger a success toast (e.g. archive), confirm auto-dismiss; deep-link to a missing file under `/runs/:id/files/missing-path` — confirm 5s warning.\n   - SVG hovers: hover Graphviz nodes on `/runs/:id` overview; hover the waterfall event chips in event-debug. Confirm tooltips appear above and clamp to viewport.\n4. Lighthouse/axe spot check on settings-models: confirm aliases + test-error tooltips now reachable via keyboard.\n\n## Out of scope\n\n- `ConfirmDialog`, `RowActionsMenu` — already on Headless UI Dialog/Menu, no change.\n- `CollapsibleFile` — 40-line one-off, marginal win, leave.\n- Theming changes; visual output should match current styling pixel-close.\n\n## Open questions\n\n- Do we want to brand sonner toasts (custom `toastOptions` for color tokens), or accept sonner defaults? Defaults are dark-themed and read well against `bg-panel`, so likely fine.\n- `TooltipProvider` `skipDelayDuration` value — 300ms is a sensible default for grouped hovers across a sidebar; revisit if it feels off in use.\n",
+          "internal.retry_count.start": 0,
+          "outcome": "succeeded",
+          "thread.start.current_node": "toolchain",
+          "internal.fidelity": "compact"
+        },
+        "node_outcomes": {
+          "start": {
+            "status": "succeeded",
+            "usage": null
+          },
+          "toolchain": {
+            "status": "succeeded",
+            "context_updates": {
+              "command.output": "blob://sha256/fc14b2ba2d770e5cd3169df7a29525c962adfc4cfa3097b9098c63ebd61a748c"
+            },
+            "notes": "Script completed: command -v cargo >/dev/null || { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y && sudo ln -sf $HOME/.cargo/bin/* /usr/local/bin/; }; cargo --version 2>&1",
+            "usage": null,
+            "timing": {
+              "wall_time_ms": 0,
+              "inference_time_ms": 0,
+              "tool_time_ms": 1365,
+              "active_time_ms": 1365
+            }
+          }
+        },
+        "next_node_id": "preflight_compile",
+        "git_commit_sha": "e31d9f13d1eba2873de0971474b5acba46c8dab7",
+        "node_visits": {
+          "toolchain": 1,
+          "start": 1
+        }
+      },
+      "diff": {
+        "summary": {
+          "files_changed": 0,
+          "additions": 0,
+          "deletions": 0
+        }
+      }
+    },
+    {
+      "seq": 0,
+      "checkpoint": {
+        "timestamp": "2026-05-27T02:05:23.438430Z",
+        "current_node": "preflight_compile",
+        "completed_nodes": [
+          "start",
+          "toolchain",
+          "preflight_compile"
+        ],
+        "node_retries": {},
+        "context_values": {
+          "internal.thread_id": "toolchain",
           "failure_signature": "",
           "internal.retry_count.start": 0,
           "internal.node_visit_count": 1,
@@ -566,11 +630,13 @@
           "internal.run_id": "01KSKJQ9FMRRBBNQW12S4A3HYJ",
           "internal.retry_count.toolchain": 0,
           "thread.start.current_node": "toolchain",
+          "thread.toolchain.current_node": "preflight_compile",
+          "internal.retry_count.preflight_compile": 0,
           "failure_class": "",
-          "current_node": "toolchain",
+          "current_node": "preflight_compile",
           "outcome": "succeeded",
           "graph.rankdir": "LR",
-          "command.output": "blob://sha256/fc14b2ba2d770e5cd3169df7a29525c962adfc4cfa3097b9098c63ebd61a748c",
+          "command.output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126",
           "internal.fidelity": "compact"
         },
         "node_outcomes": {
@@ -588,15 +654,30 @@
               "active_time_ms": 1365
             }
           },
+          "preflight_compile": {
+            "status": "succeeded",
+            "context_updates": {
+              "command.output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126"
+            },
+            "notes": "Script completed: cargo check -q --workspace 2>&1",
+            "usage": null,
+            "timing": {
+              "wall_time_ms": 0,
+              "inference_time_ms": 0,
+              "tool_time_ms": 126855,
+              "active_time_ms": 126855
+            }
+          },
           "start": {
             "status": "succeeded",
             "usage": null
           }
         },
-        "next_node_id": "preflight_compile",
+        "next_node_id": "preflight_lint",
         "node_visits": {
           "start": 1,
-          "toolchain": 1
+          "toolchain": 1,
+          "preflight_compile": 1
         }
       },
       "diff": {}
@@ -622,6 +703,33 @@
   "superseded_by": null,
   "pending_interviews": {},
   "stages": {
+    "preflight_compile@1": {
+      "first_event_seq": 32,
+      "prompt": null,
+      "response": null,
+      "completion": null,
+      "provider_used": null,
+      "diff": null,
+      "script_invocation": {
+        "script": "cargo check -q --workspace 2>&1",
+        "command": "exec 2>&1\ncargo check -q --workspace 2>&1",
+        "language": "shell"
+      },
+      "script_timing": null,
+      "parallel_results": null,
+      "output": null,
+      "started_at": "2026-05-27T02:03:16.572681Z",
+      "handler": "command",
+      "usage": {
+        "input_tokens": 0,
+        "output_tokens": 0,
+        "total_tokens": 0,
+        "reasoning_tokens": 0,
+        "cache_read_tokens": 0,
+        "cache_write_tokens": 0
+      },
+      "state": "running"
+    },
     "start@1": {
       "first_event_seq": 18,
       "prompt": null,
@@ -660,7 +768,12 @@
       "first_event_seq": 22,
       "prompt": null,
       "response": null,
-      "completion": null,
+      "completion": {
+        "outcome": "succeeded",
+        "notes": "Script completed: command -v cargo >/dev/null || { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y && sudo ln -sf $HOME/.cargo/bin/* /usr/local/bin/; }; cargo --version 2>&1",
+        "failure_reason": null,
+        "timestamp": "2026-05-27T02:03:12.693140Z"
+      },
       "provider_used": null,
       "diff": null,
       "script_invocation": {
@@ -668,11 +781,27 @@
         "command": "exec 2>&1\ncommand -v cargo >/dev/null || { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y && sudo ln -sf $HOME/.cargo/bin/* /usr/local/bin/; }; cargo --version 2>&1",
         "language": "shell"
       },
-      "script_timing": null,
+      "script_timing": {
+        "output": "blob://sha256/fc14b2ba2d770e5cd3169df7a29525c962adfc4cfa3097b9098c63ebd61a748c",
+        "exit_code": 0,
+        "duration_ms": 1365,
+        "termination": "exited",
+        "output_bytes": 36,
+        "live_streaming": true
+      },
       "parallel_results": null,
       "output": null,
+      "output_bytes": 36,
+      "live_streaming": true,
+      "termination": "exited",
       "started_at": "2026-05-27T02:03:11.313253Z",
       "handler": "command",
+      "timing": {
+        "wall_time_ms": 1379,
+        "inference_time_ms": 0,
+        "tool_time_ms": 1365,
+        "active_time_ms": 1365
+      },
       "usage": {
         "input_tokens": 0,
         "output_tokens": 0,
@@ -681,7 +810,7 @@
         "cache_read_tokens": 0,
         "cache_write_tokens": 0
       },
-      "state": "running"
+      "state": "succeeded"
     }
   }
 }
\ No newline at end of file
diff --git a/stages/002-toolchain@1/output.log b/stages/002-toolchain@1/output.log
new file mode 100644
index 000000000..4e86d161d
--- /dev/null
+++ b/stages/002-toolchain@1/output.log
@@ -0,0 +1 @@
+blob://sha256/fc14b2ba2d770e5cd3169df7a29525c962adfc4cfa3097b9098c63ebd61a748c
\ No newline at end of file
diff --git a/stages/002-toolchain@1/script_timing.json b/stages/002-toolchain@1/script_timing.json
new file mode 100644
index 000000000..92f6311b5
--- /dev/null
+++ b/stages/002-toolchain@1/script_timing.json
@@ -0,0 +1,8 @@
+{
+  "output": "blob://sha256/fc14b2ba2d770e5cd3169df7a29525c962adfc4cfa3097b9098c63ebd61a748c",
+  "exit_code": 0,
+  "duration_ms": 1365,
+  "termination": "exited",
+  "output_bytes": 36,
+  "live_streaming": true
+}
\ No newline at end of file
diff --git a/stages/002-toolchain@1/status.json b/stages/002-toolchain@1/status.json
new file mode 100644
index 000000000..fabb11160
--- /dev/null
+++ b/stages/002-toolchain@1/status.json
@@ -0,0 +1,6 @@
+{
+  "outcome": "succeeded",
+  "notes": "Script completed: command -v cargo >/dev/null || { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y && sudo ln -sf $HOME/.cargo/bin/* /usr/local/bin/; }; cargo --version 2>&1",
+  "failure_reason": null,
+  "timestamp": "2026-05-27T02:03:12.693140Z"
+}
\ No newline at end of file
diff --git a/stages/003-preflight_compile@1/script_invocation.json b/stages/003-preflight_compile@1/script_invocation.json
new file mode 100644
index 000000000..d3abb832f
--- /dev/null
+++ b/stages/003-preflight_compile@1/script_invocation.json
@@ -0,0 +1,5 @@
+{
+  "script": "cargo check -q --workspace 2>&1",
+  "command": "exec 2>&1\ncargo check -q --workspace 2>&1",
+  "language": "shell"
+}
\ No newline at end of file