diff --git a/run.json b/run.json
index 4e5cf477a..69621ab06 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": "2026-05-27T02:05:27.565742Z",
+  "last_event_at": "2026-05-27T02:29:33.133210Z",
   "pending_control": null,
   "checkpoints": [
     {
@@ -690,9 +690,9 @@
       }
     },
     {
-      "seq": 0,
+      "seq": 49,
       "checkpoint": {
-        "timestamp": "2026-05-27T02:07:50.667479Z",
+        "timestamp": "2026-05-27T02:07:54.545289Z",
         "current_node": "preflight_lint",
         "completed_nodes": [
           "start",
@@ -702,9 +702,112 @@
         ],
         "node_retries": {},
         "context_values": {
+          "internal.node_visit_count": 1,
+          "graph.model_stylesheet": "\n            * { model: claude-opus-4-7; }\n        ",
+          "internal.retry_count.preflight_lint": 0,
+          "current_node": "preflight_lint",
+          "internal.fidelity": "compact",
+          "graph.rankdir": "LR",
+          "internal.retry_count.toolchain": 0,
+          "thread.toolchain.current_node": "preflight_compile",
+          "command.output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126",
+          "internal.retry_count.preflight_compile": 0,
+          "internal.run_id": "01KSKJQ9FMRRBBNQW12S4A3HYJ",
+          "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.preflight_compile.current_node": "preflight_lint",
+          "failure_signature": "",
           "internal.thread_id": "preflight_compile",
+          "thread.start.current_node": "toolchain",
+          "internal.work_dir": "/home/daytona/workspace/fabro",
+          "failure_class": ""
+        },
+        "node_outcomes": {
+          "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
+            }
+          },
+          "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
+            }
+          },
+          "preflight_lint": {
+            "status": "succeeded",
+            "context_updates": {
+              "command.output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126"
+            },
+            "notes": "Script completed: cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1",
+            "usage": null,
+            "timing": {
+              "wall_time_ms": 0,
+              "inference_time_ms": 0,
+              "tool_time_ms": 143093,
+              "active_time_ms": 143093
+            }
+          },
+          "start": {
+            "status": "succeeded",
+            "usage": null
+          }
+        },
+        "next_node_id": "implement",
+        "git_commit_sha": "4affd64bbd7a705a8c647089be65a00e2c26bffc",
+        "node_visits": {
+          "start": 1,
+          "preflight_compile": 1,
+          "preflight_lint": 1,
+          "toolchain": 1
+        }
+      },
+      "diff": {
+        "summary": {
+          "files_changed": 0,
+          "additions": 0,
+          "deletions": 0
+        }
+      }
+    },
+    {
+      "seq": 0,
+      "checkpoint": {
+        "timestamp": "2026-05-27T02:29:33.171946Z",
+        "current_node": "implement",
+        "completed_nodes": [
+          "start",
+          "toolchain",
+          "preflight_compile",
+          "preflight_lint",
+          "implement"
+        ],
+        "node_retries": {},
+        "context_values": {
+          "last_response": "Implemented the overlay replacement across `fabro-web`.\n\nWhat changed:\n- Replaced DIY `Tooltip` / `HoverCard` in `app/components/ui.tsx` with Radix wrappers.\n- Added app-level `TooltipProvider` and So",
+          "internal.thread_id": "preflight_lint",
           "failure_signature": "",
           "internal.retry_count.start": 0,
+          "internal.retry_count.implement": 0,
+          "thread.preflight_lint.current_node": "implement",
           "internal.retry_count.preflight_lint": 0,
           "internal.node_visit_count": 1,
           "graph.model_stylesheet": "\n            * { model: claude-opus-4-7; }\n        ",
@@ -712,14 +815,16 @@
           "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.run_id": "01KSKJQ9FMRRBBNQW12S4A3HYJ",
           "internal.retry_count.toolchain": 0,
+          "response.implement": "Implemented the overlay replacement across `fabro-web`.\n\nWhat changed:\n- Replaced DIY `Tooltip` / `HoverCard` in `app/components/ui.tsx` with Radix wrappers.\n- Added app-level `TooltipProvider` and Sonner `<Toaster richColors position=\"bottom-right\" />` in `app/layouts/app-shell.tsx`.\n- Replaced custom toast context/rendering with a Sonner-backed shim preserving `useToast()` / `ToastProvider` API.\n- Rewrote `toast.test.tsx` around Sonner observable behavior and persistent error toasts.\n- Converted CSS-only settings model tooltips to real `<Tooltip>`.\n- Added shared `FloatingTooltip` for SVG/DOMRect-anchored hovers and migrated:\n  - `run-overview`\n  - `event-debug` DNA popover\n  - `event-debug` thread DNA popover\n- Deleted `hover-card-style.ts`.\n- Added dependencies:\n  - `@radix-ui/react-tooltip`\n  - `@radix-ui/react-hover-card`\n  - `sonner`\n- Removed the stale toast `action` type usage from the remaining test helper.\n\nVerification:\n- `cd apps/fabro-web && bun run typecheck` ✅\n- `cd apps/fabro-web && bun run test` ✅  \n  - This runs the package script: `bun test --isolate`\n  - 493 tests passed.",
           "thread.start.current_node": "toolchain",
           "thread.toolchain.current_node": "preflight_compile",
           "internal.retry_count.preflight_compile": 0,
           "failure_class": "",
-          "current_node": "preflight_lint",
+          "current_node": "implement",
           "outcome": "succeeded",
           "graph.rankdir": "LR",
           "thread.preflight_compile.current_node": "preflight_lint",
+          "last_stage": "implement",
           "command.output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126",
           "internal.fidelity": "compact"
         },
@@ -752,6 +857,42 @@
               "active_time_ms": 126855
             }
           },
+          "implement": {
+            "status": "succeeded",
+            "context_updates": {
+              "response.implement": "Implemented the overlay replacement across `fabro-web`.\n\nWhat changed:\n- Replaced DIY `Tooltip` / `HoverCard` in `app/components/ui.tsx` with Radix wrappers.\n- Added app-level `TooltipProvider` and Sonner `<Toaster richColors position=\"bottom-right\" />` in `app/layouts/app-shell.tsx`.\n- Replaced custom toast context/rendering with a Sonner-backed shim preserving `useToast()` / `ToastProvider` API.\n- Rewrote `toast.test.tsx` around Sonner observable behavior and persistent error toasts.\n- Converted CSS-only settings model tooltips to real `<Tooltip>`.\n- Added shared `FloatingTooltip` for SVG/DOMRect-anchored hovers and migrated:\n  - `run-overview`\n  - `event-debug` DNA popover\n  - `event-debug` thread DNA popover\n- Deleted `hover-card-style.ts`.\n- Added dependencies:\n  - `@radix-ui/react-tooltip`\n  - `@radix-ui/react-hover-card`\n  - `sonner`\n- Removed the stale toast `action` type usage from the remaining test helper.\n\nVerification:\n- `cd apps/fabro-web && bun run typecheck` ✅\n- `cd apps/fabro-web && bun run test` ✅  \n  - This runs the package script: `bun test --isolate`\n  - 493 tests passed.",
+              "last_stage": "implement",
+              "last_response": "Implemented the overlay replacement across `fabro-web`.\n\nWhat changed:\n- Replaced DIY `Tooltip` / `HoverCard` in `app/components/ui.tsx` with Radix wrappers.\n- Added app-level `TooltipProvider` and So"
+            },
+            "notes": "Stage completed: implement",
+            "usage": {
+              "input": {
+                "usage": {
+                  "model": {
+                    "provider": "openai",
+                    "model_id": "gpt-5.5"
+                  },
+                  "tokens": {
+                    "input_tokens": 3331251,
+                    "output_tokens": 21142,
+                    "reasoning_tokens": 17825,
+                    "cache_read_tokens": 9311232,
+                    "cache_write_tokens": 0
+                  }
+                },
+                "facts": {
+                  "algorithm": "openai"
+                }
+              },
+              "total_usd_micros": 22480881
+            },
+            "timing": {
+              "wall_time_ms": 0,
+              "inference_time_ms": 1203328,
+              "tool_time_ms": 92932,
+              "active_time_ms": 1296260
+            }
+          },
           "start": {
             "status": "succeeded",
             "usage": null
@@ -771,12 +912,13 @@
             }
           }
         },
-        "next_node_id": "implement",
+        "next_node_id": "simplify_opus",
         "node_visits": {
           "preflight_lint": 1,
           "start": 1,
           "toolchain": 1,
-          "preflight_compile": 1
+          "preflight_compile": 1,
+          "implement": 1
         }
       },
       "diff": {}
@@ -936,7 +1078,12 @@
       "first_event_seq": 42,
       "prompt": null,
       "response": null,
-      "completion": null,
+      "completion": {
+        "outcome": "succeeded",
+        "notes": "Script completed: cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1",
+        "failure_reason": null,
+        "timestamp": "2026-05-27T02:07:50.666663Z"
+      },
       "provider_used": null,
       "diff": null,
       "script_invocation": {
@@ -944,11 +1091,27 @@
         "command": "exec 2>&1\ncargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1",
         "language": "shell"
       },
-      "script_timing": null,
+      "script_timing": {
+        "output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126",
+        "exit_code": 0,
+        "duration_ms": 143093,
+        "termination": "exited",
+        "output_bytes": 0,
+        "live_streaming": false
+      },
       "parallel_results": null,
       "output": null,
+      "output_bytes": 0,
+      "live_streaming": false,
+      "termination": "exited",
       "started_at": "2026-05-27T02:05:27.565063Z",
       "handler": "command",
+      "timing": {
+        "wall_time_ms": 143100,
+        "inference_time_ms": 0,
+        "tool_time_ms": 143093,
+        "active_time_ms": 143093
+      },
       "usage": {
         "input_tokens": 0,
         "output_tokens": 0,
@@ -957,6 +1120,261 @@
         "cache_read_tokens": 0,
         "cache_write_tokens": 0
       },
+      "state": "succeeded"
+    },
+    "implement@1": {
+      "first_event_seq": 52,
+      "prompt": null,
+      "response": null,
+      "completion": null,
+      "provider_used": {
+        "mode": "agent",
+        "provider": "openai",
+        "model": "gpt-5.5",
+        "reasoning_effort": "xhigh"
+      },
+      "diff": null,
+      "script_invocation": null,
+      "script_timing": null,
+      "parallel_results": null,
+      "output": null,
+      "started_at": "2026-05-27T02:07:54.546579Z",
+      "handler": "agent",
+      "usage": {
+        "input_tokens": 3331251,
+        "output_tokens": 21142,
+        "total_tokens": 12681450,
+        "reasoning_tokens": 17825,
+        "cache_read_tokens": 9311232,
+        "cache_write_tokens": 0,
+        "total_usd_micros": 22480881
+      },
+      "model": {
+        "provider": "openai",
+        "model_id": "gpt-5.5"
+      },
+      "todos": {
+        "kind": "openai_plan",
+        "list_id": "openai_plan:9d49bcfa-9485-481a-879c-b0fea914843c",
+        "items": [
+          {
+            "id": "f8d66af1388a728d",
+            "status": "completed",
+            "order": 0,
+            "subject": "Inspect existing overlay/toast implementations and call sites"
+          },
+          {
+            "id": "273850c1e25b7f25",
+            "status": "completed",
+            "order": 1,
+            "subject": "Run focused current tests to establish baseline/red target"
+          },
+          {
+            "id": "fbeec64ea6640d0a",
+            "status": "completed",
+            "order": 2,
+            "subject": "Add Radix/Sonner dependencies and update lockfile"
+          },
+          {
+            "id": "2e4ecc964affe520",
+            "status": "completed",
+            "order": 3,
+            "subject": "Replace Tooltip/HoverCard and app-shell providers/toaster"
+          },
+          {
+            "id": "0af6f128b525f4e8",
+            "status": "completed",
+            "order": 4,
+            "subject": "Replace toast implementation and tests"
+          },
+          {
+            "id": "c3938f73d156be07",
+            "status": "completed",
+            "order": 5,
+            "subject": "Add FloatingTooltip and migrate SVG hover sites"
+          },
+          {
+            "id": "c51526471b16979d",
+            "status": "completed",
+            "order": 6,
+            "subject": "Replace CSS-only settings-models tooltips"
+          },
+          {
+            "id": "5985c7c77c9b8eae",
+            "status": "completed",
+            "order": 7,
+            "subject": "Run typecheck and tests, then fix issues"
+          }
+        ]
+      },
+      "permission_level": "full",
+      "agent_tools": [
+        {
+          "name": "apply_patch",
+          "description": "Use the `apply_patch` tool to edit files. This is a FREEFORM tool, so do not wrap the patch in JSON.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "write",
+          "invoked": true
+        },
+        {
+          "name": "close_agent",
+          "description": "Close a running subagent that is no longer needed.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "subagent",
+          "invoked": false
+        },
+        {
+          "name": "glob",
+          "description": "Find files by file names using a glob pattern. Use path to choose the search root. Prefer this over shell find or ls when locating repository files.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "read",
+          "invoked": true
+        },
+        {
+          "name": "grep",
+          "description": "Search file contents with a regex pattern. Use path to choose the search root, glob_filter to limit matching files, case_insensitive for case folding, and max_results to cap output.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "read",
+          "invoked": true
+        },
+        {
+          "name": "read_file",
+          "description": "Read files before editing them. Returns line-numbered text and supports offset/limit for large files. Use this instead of shell cat, head, tail, or sed when inspecting repository files.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "read",
+          "invoked": true
+        },
+        {
+          "name": "request_user_input",
+          "description": "Ask the human one or more questions and wait for their answers before continuing this stage.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "other",
+          "invoked": false
+        },
+        {
+          "name": "send_input",
+          "description": "Send a follow-up message to a running subagent when new information or corrected instructions are needed.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "subagent",
+          "invoked": false
+        },
+        {
+          "name": "shell",
+          "description": "Execute shell commands for terminal operations, package managers, tests and builds. Use dedicated tools for file reads, file edits, filename searches, and content searches. Provide timeout_ms for long-running commands.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "shell",
+          "invoked": true
+        },
+        {
+          "name": "spawn_agent",
+          "description": "Spawn a subagent for independent work or context isolation. Use it for tasks that can proceed separately, and avoid duplicating the same work in the parent session.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "subagent",
+          "invoked": false
+        },
+        {
+          "name": "update_plan",
+          "description": "Update the multi-step plan for the current task. Submit the entire plan; existing steps are reconciled by exact step text.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "other",
+          "invoked": true
+        },
+        {
+          "name": "wait",
+          "description": "Wait for a subagent to complete, then use the result to synthesize the outcome for the user.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "subagent",
+          "invoked": false
+        },
+        {
+          "name": "web_fetch",
+          "description": "Fetch content from a URL that starts with http:// or https://. Pass a prompt to extract specific information or summarize the page; omit prompt to return the page content.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "other",
+          "invoked": false
+        },
+        {
+          "name": "web_search",
+          "description": "Search the web using Brave Search when current external information is needed. Returns result titles, URLs, and descriptions; use web_fetch for a specific URL.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "other",
+          "invoked": false
+        },
+        {
+          "name": "write_file",
+          "description": "Create new files, or overwrite an existing file only when replacement is explicitly intended. Prefer edit_file for targeted changes to existing files because write_file overwrites the full file content.",
+          "source": {
+            "kind": "native"
+          },
+          "category": "write",
+          "invoked": false
+        }
+      ],
+      "context_window": {
+        "provider": "openai",
+        "model": "gpt-5.5",
+        "context_window_tokens": 272000,
+        "input_tokens": 167375,
+        "usage_percent": 61.53492647058823,
+        "count_method": "response_usage_scaled_breakdown",
+        "staleness": "live",
+        "generated_at": "2026-05-27T02:29:33.127743Z",
+        "event_seq": 502,
+        "breakdown": [
+          {
+            "category": "system_prompt",
+            "tokens": 905,
+            "usage_percent": 0.3327205882352941
+          },
+          {
+            "category": "tools",
+            "tokens": 1301,
+            "usage_percent": 0.4783088235294118
+          },
+          {
+            "category": "memory",
+            "tokens": 3077,
+            "usage_percent": 1.13125
+          },
+          {
+            "category": "conversation",
+            "tokens": 162085,
+            "usage_percent": 59.59007352941177
+          },
+          {
+            "category": "other",
+            "tokens": 7,
+            "usage_percent": 0.002573529411764706
+          }
+        ],
+        "warnings": []
+      },
       "state": "running"
     }
   }
diff --git a/stages/004-preflight_lint@1/output.log b/stages/004-preflight_lint@1/output.log
new file mode 100644
index 000000000..d87ba9545
--- /dev/null
+++ b/stages/004-preflight_lint@1/output.log
@@ -0,0 +1 @@
+blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126
\ No newline at end of file
diff --git a/stages/004-preflight_lint@1/script_timing.json b/stages/004-preflight_lint@1/script_timing.json
new file mode 100644
index 000000000..9027709d5
--- /dev/null
+++ b/stages/004-preflight_lint@1/script_timing.json
@@ -0,0 +1,8 @@
+{
+  "output": "blob://sha256/12ae32cb1ec02d01eda3581b127c1fee3b0dc53572ed6baf239721a03d82e126",
+  "exit_code": 0,
+  "duration_ms": 143093,
+  "termination": "exited",
+  "output_bytes": 0,
+  "live_streaming": false
+}
\ No newline at end of file
diff --git a/stages/004-preflight_lint@1/status.json b/stages/004-preflight_lint@1/status.json
new file mode 100644
index 000000000..57ee0cc0b
--- /dev/null
+++ b/stages/004-preflight_lint@1/status.json
@@ -0,0 +1,6 @@
+{
+  "outcome": "succeeded",
+  "notes": "Script completed: cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1",
+  "failure_reason": null,
+  "timestamp": "2026-05-27T02:07:50.666663Z"
+}
\ No newline at end of file
diff --git a/stages/005-implement@1/prompt.md b/stages/005-implement@1/prompt.md
new file mode 100644
index 000000000..c37ae45fa
--- /dev/null
+++ b/stages/005-implement@1/prompt.md
@@ -0,0 +1,107 @@
+Goal: # Replace DIY overlay primitives in fabro-web
+
+## Context
+
+`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.
+
+Goal: delete the DIY code, gain real a11y/positioning, keep call sites stable.
+
+## Scope (3 areas)
+
+### 1. Tooltip + HoverCard → Radix wrappers
+
+Add `@radix-ui/react-tooltip` and `@radix-ui/react-hover-card`.
+
+Keep 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.
+
+- Delete `useHoverAnchor` (ui.tsx:141-179).
+- Mount one `TooltipProvider` in `app/layouts/app-shell.tsx` (delay 200, skipDelayDuration 300) so siblings share a delay group.
+- HoverCard wrapper passes `openDelay` (default 0, stage-sidebar still passes 200) → Radix `openDelay`.
+- Keep `PopoverHeader` / `PopoverRows` / `PopoverRow` unchanged — presentational, used inside HoverCard `content`.
+
+Call 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`.
+
+### 2. Toast system → Sonner
+
+Add `sonner`. Mount `<Toaster richColors position="bottom-right" />` in `app/layouts/app-shell.tsx` next to the new `TooltipProvider`.
+
+Replace `app/components/toast.tsx` with a tiny shim that preserves the current API:
+```ts
+// useToast() returns { push, dismiss, clear }
+// push({ message, tone, autoDismissMs }) → toast(msg) / toast.error(msg) / toast(msg, { duration })
+```
+Keep the shim so the 10 consumers + `useRunToasts` need zero changes. `action` field unused in production — drop from the type (only the test referenced it).
+
+Rewrite `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).
+
+### 3. CSS-only tooltips → real Tooltip
+
+Replace 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.
+
+### 4. SVG-anchored hovers → shared `FloatingTooltip` helper
+
+Two 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).
+
+Extract a single helper in `app/components/floating-tooltip.tsx`:
+```ts
+function FloatingTooltip({ rect, placement, children }) // portals to body, applies collision-avoiding style
+```
+Absorb 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.
+
+## Files to modify
+
+Modify:
+- `app/components/ui.tsx` — replace Tooltip/HoverCard impls; delete useHoverAnchor
+- `app/components/toast.tsx` — shrink to ~30-line sonner shim
+- `app/components/toast.test.tsx` — rewrite assertions
+- `app/layouts/app-shell.tsx` — mount `TooltipProvider` + sonner `<Toaster />`, drop `<ToastProvider>`
+- `app/routes/settings-models.tsx` — swap two inline CSS tooltips for `<Tooltip>`
+- `app/routes/run-overview.tsx` — use `FloatingTooltip`
+- `app/components/event-debug.tsx` — use `FloatingTooltip` (two call sites)
+- `apps/fabro-web/package.json` — add `@radix-ui/react-tooltip`, `@radix-ui/react-hover-card`, `sonner`
+
+Create:
+- `app/components/floating-tooltip.tsx`
+
+Delete:
+- `app/components/hover-card-style.ts`
+
+## Verification
+
+1. `cd apps/fabro-web && bun run typecheck` — no type errors.
+2. `cd apps/fabro-web && bun test` — `toast.test.tsx` passes against new shim; all other tests unchanged.
+3. Run dev locally (`fabro server start` + `cd apps/fabro-web && bun run dev`) and exercise:
+   - 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.
+   - 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).
+   - 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.
+   - 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.
+4. Lighthouse/axe spot check on settings-models: confirm aliases + test-error tooltips now reachable via keyboard.
+
+## Out of scope
+
+- `ConfirmDialog`, `RowActionsMenu` — already on Headless UI Dialog/Menu, no change.
+- `CollapsibleFile` — 40-line one-off, marginal win, leave.
+- Theming changes; visual output should match current styling pixel-close.
+
+## Open questions
+
+- 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.
+- `TooltipProvider` `skipDelayDuration` value — 300ms is a sensible default for grouped hovers across a sidebar; revisit if it feels off in use.
+
+
+## Completed stages
+- **toolchain**: succeeded
+  - Script: `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`
+  - Output:
+    ```
+    cargo 1.95.0 (f2d3ce0bd 2026-03-21)
+    ```
+- **preflight_compile**: succeeded
+  - Script: `cargo check -q --workspace 2>&1`
+  - Output: (empty)
+- **preflight_lint**: succeeded
+  - Script: `cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1`
+  - Output: (empty)
+
+
+Read the plan file referenced in the goal and implement every step. Make all the code changes described in the plan. Use red/green TDD.
\ No newline at end of file
diff --git a/stages/005-implement@1/provider_used.json b/stages/005-implement@1/provider_used.json
new file mode 100644
index 000000000..c57772db6
--- /dev/null
+++ b/stages/005-implement@1/provider_used.json
@@ -0,0 +1,6 @@
+{
+  "mode": "agent",
+  "provider": "openai",
+  "model": "gpt-5.5",
+  "reasoning_effort": "xhigh"
+}
\ No newline at end of file
diff --git a/stages/005-implement@1/response.md b/stages/005-implement@1/response.md
new file mode 100644
index 000000000..cf50ed532
--- /dev/null
+++ b/stages/005-implement@1/response.md
@@ -0,0 +1,24 @@
+Implemented the overlay replacement across `fabro-web`.
+
+What changed:
+- Replaced DIY `Tooltip` / `HoverCard` in `app/components/ui.tsx` with Radix wrappers.
+- Added app-level `TooltipProvider` and Sonner `<Toaster richColors position="bottom-right" />` in `app/layouts/app-shell.tsx`.
+- Replaced custom toast context/rendering with a Sonner-backed shim preserving `useToast()` / `ToastProvider` API.
+- Rewrote `toast.test.tsx` around Sonner observable behavior and persistent error toasts.
+- Converted CSS-only settings model tooltips to real `<Tooltip>`.
+- Added shared `FloatingTooltip` for SVG/DOMRect-anchored hovers and migrated:
+  - `run-overview`
+  - `event-debug` DNA popover
+  - `event-debug` thread DNA popover
+- Deleted `hover-card-style.ts`.
+- Added dependencies:
+  - `@radix-ui/react-tooltip`
+  - `@radix-ui/react-hover-card`
+  - `sonner`
+- Removed the stale toast `action` type usage from the remaining test helper.
+
+Verification:
+- `cd apps/fabro-web && bun run typecheck` ✅
+- `cd apps/fabro-web && bun run test` ✅  
+  - This runs the package script: `bun test --isolate`
+  - 493 tests passed.
\ No newline at end of file