diff --git a/run.json b/run.json
index e4a48255b..e14fa10ce 100644
--- a/run.json
+++ b/run.json
@@ -485,14 +485,106 @@
     }
   },
   "web_url": "http://127.0.0.1:32276/runs/01KSDGB3G5YAPQMCXKE23SF08C",
-  "start": null,
-  "status": {
-    "kind": "starting"
+  "start": {
+    "start_time": "2026-05-24T17:26:07.203930Z",
+    "run_branch": "fabro/run/01KSDGB3G5YAPQMCXKE23SF08C",
+    "base_sha": "9d1f1709087ae1aeb0c5fe937417145d4bf33ada"
   },
-  "status_updated_at": "2026-05-24T17:25:51.291109Z",
-  "last_event_at": "2026-05-24T17:26:06.824873Z",
+  "status": {
+    "kind": "running"
+  },
+  "status_updated_at": "2026-05-24T17:26:07.203998Z",
+  "last_event_at": "2026-05-24T17:26:08.972376Z",
   "pending_control": null,
-  "checkpoints": [],
+  "checkpoints": [
+    {
+      "seq": 21,
+      "checkpoint": {
+        "timestamp": "2026-05-24T17:26:08.972058Z",
+        "current_node": "start",
+        "completed_nodes": [
+          "start"
+        ],
+        "node_retries": {},
+        "context_values": {
+          "internal.fidelity": "compact",
+          "graph.goal": "# Fold Context Window Into Agent Messages Implementation Plan\n\n> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.\n\n**Goal:** Remove the chatty `agent.context_window.snapshot` event and persist context-window data through existing `agent.message` events.\n\n**Architecture:** Compute the context-window breakdown locally while the agent still has the exact request, attach the final content-free projection to the next `agent.message`, and let the run projection reducer store that latest projection for `GET /runs/{id}/stages/{stageId}/context-window`. Do not call provider token-count APIs during normal execution.\n\n**Tech Stack:** Rust, Serde, Fabro agent/session events, Fabro workflow event conversion, Fabro store projections, OpenAPI/progenitor, generated TypeScript client, React/SWR.\n\n---\n\n## Scope And Decisions\n\n- Remove `agent.context_window.snapshot` completely from new code. This is a greenfield/no-prod app, so do not preserve backward-compatible deserialization or frontend handling for old snapshot events.\n- Keep `StageContextWindowProjection`, `StageContextWindow`, `StageProjection.context_window`, and the existing context-window GET endpoint.\n- Add optional `context_window` data to `agent.message` properties.\n- Normal execution uses only local estimates and token usage returned by normal LLM responses.\n- Do not call `Client::count_input_tokens` from `fabro-agent::Session`.\n- The GET endpoint remains projection-backed for this pass. It must not require an in-memory session and must not trigger provider token-count API calls.\n- Failed-before-response turns do not persist context-window data.\n- Live pre-response context-window updates are not required. The UI updates after `agent.message`.\n\n## File Map\n\n- Modify `lib/crates/fabro-types/src/run_event/agent.rs`\n  - Add `context_window: Option<StageContextWindowProjection>` to `AgentMessageProps`.\n  - Remove `AgentContextWindowSnapshotProps`.\n- Modify `lib/crates/fabro-types/src/run_event/mod.rs`\n  - Remove the `AgentContextWindowSnapshot` event variant, name mapping, known-event entry, and serde tests.\n  - Update `agent.message` serde tests to cover optional context-window data.\n- Modify `lib/crates/fabro-agent/src/types.rs`\n  - Remove `AgentEvent::ContextWindowSnapshot`.\n  - Add `context_window: Option<StageContextWindowProjection>` to `AgentEvent::AssistantMessage`.\n- Modify `lib/crates/fabro-agent/src/session.rs`\n  - Remove async provider-count task and response-usage snapshot event emission.\n  - Keep local context-window snapshot construction at request-build time.\n  - Attach the scaled or local projection to `AssistantMessage`.\n- Keep `lib/crates/fabro-agent/src/context_window.rs`\n  - Reuse `build_local_snapshot` and `scaled_snapshot`.\n  - Remove only tests or helpers that exist solely for provider-count snapshot emission.\n- Modify `lib/crates/fabro-workflow/src/event/convert.rs`\n  - Remove conversion for `AgentEvent::ContextWindowSnapshot`.\n  - Copy `context_window` from `AgentEvent::AssistantMessage` into `AgentMessageProps`.\n- Modify `lib/crates/fabro-workflow/src/event/names.rs`\n  - Remove the snapshot event name.\n- Modify `lib/crates/fabro-store/src/run_state.rs`\n  - Remove reducer support for `EventBody::AgentContextWindowSnapshot`.\n  - When reducing `EventBody::AgentMessage`, copy `props.context_window` into `stage.context_window` when present and stamp `event_seq`.\n- Modify `lib/crates/fabro-server/src/server/tests.rs`\n  - Seed context-window endpoint tests with `agent.message` events that include context-window data.\n- Modify `docs/public/api-reference/fabro-api.yaml`\n  - Add optional `context_window` to `AgentMessageProps`.\n  - Remove the snapshot event schema/variant.\n- Regenerate/update `lib/packages/fabro-api-client/src`.\n- Modify `apps/fabro-web/app/lib/run-events.ts` and tests\n  - Remove special handling for `agent.context_window.snapshot`.\n  - Rely on existing `agent.message` invalidation for stage events and context-window data.\n\n## Implementation Steps\n\n### Task 1: Move The Event Contract Onto `agent.message`\n\n- [ ] Add optional `context_window` to Rust `AgentMessageProps`.\n- [ ] Remove `AgentContextWindowSnapshotProps` and the `agent.context_window.snapshot` `EventBody` variant.\n- [ ] Update run-event serde tests so `agent.message` round-trips with and without `context_window`.\n- [ ] Remove tests whose only assertion is that `agent.context_window.snapshot` is known or serializes.\n\n### Task 2: Stop Emitting Snapshot Events\n\n- [ ] Remove `AgentEvent::ContextWindowSnapshot` and its trace/debug handling.\n- [ ] Change `AgentEvent::AssistantMessage` to carry `context_window: Option<StageContextWindowProjection>`.\n- [ ] In `Session::run_single_input`, keep the local context-window snapshot returned from request construction.\n- [ ] Delete the spawned `count_input_tokens(... PreferProvider)` task and its fingerprint suppression state.\n- [ ] After the normal LLM response arrives, compute:\n  - `ResponseUsageScaledBreakdown` when response input/cache usage is positive.\n  - `LocalEstimate` when response usage has no usable input tokens.\n- [ ] Attach that projection to the emitted `AssistantMessage`.\n\n### Task 3: Update Workflow Conversion And Store Projection\n\n- [ ] Remove snapshot event name/conversion branches.\n- [ ] Include `context_window` when converting `AgentEvent::AssistantMessage` to `EventBody::AgentMessage`.\n- [ ] In the store reducer, update `stage.context_window` from `AgentMessageProps.context_window`.\n- [ ] Stamp the copied projection with the `agent.message` event sequence.\n- [ ] Replace store tests for snapshot replacement with message-carried context-window tests.\n\n### Task 4: Keep The GET Endpoint Projection-Backed\n\n- [ ] Keep the endpoint route and response type unchanged.\n- [ ] Keep existing `not_agent_stage`, `not_observed`, and terminal `stored` behavior.\n- [ ] Update endpoint tests to seed context-window data via `agent.message`.\n- [ ] Do not add endpoint-time provider token-count calls.\n\n### Task 5: Remove Frontend And API Trace\n\n- [ ] Remove frontend constants/tests for `agent.context_window.snapshot`.\n- [ ] Ensure `agent.message` still invalidates `stageContextWindow` through existing stage activity handling.\n- [ ] Update OpenAPI and regenerated TypeScript client so no snapshot event model remains.\n- [ ] Run a final search for `agent.context_window.snapshot`, `AgentContextWindowSnapshot`, and `ContextWindowSnapshot`; only historical docs or this plan may remain.\n\n## Test Plan\n\n- Run `cargo build -p fabro-api` after OpenAPI/Rust type changes.\n- Run targeted Rust tests:\n  - `cargo nextest run -p fabro-agent`\n  - `cargo nextest run -p fabro-workflow`\n  - `cargo nextest run -p fabro-store`\n  - `cargo nextest run -p fabro-server get_run_stage_context_window`\n  - `cargo nextest run -p fabro-types agent_message`\n- Regenerate TypeScript client with `cd lib/packages/fabro-api-client && bun run generate`.\n- Run web checks:\n  - `cd apps/fabro-web && bun test`\n  - `cd apps/fabro-web && bun run typecheck`\n  - `cd lib/packages/fabro-api-client && bun run typecheck`\n- Run final targeted searches:\n  - `rg -n \"agent\\\\.context_window\\\\.snapshot|AgentContextWindowSnapshot|ContextWindowSnapshot\" lib/crates apps/fabro-web lib/packages docs/public/api-reference/fabro-api.yaml`\n  - Expected: no implementation/API/frontend matches.\n\n## Acceptance Criteria\n\n- Normal agent runs do not emit `agent.context_window.snapshot`.\n- Normal agent runs do not call provider token-count endpoints for context-window reporting.\n- `agent.message` includes context-window data when the agent produced a response.\n- `GET /runs/{id}/stages/{stageId}/context-window` still returns the latest context-window projection.\n- The event log contains no standalone context-window snapshot events.\n- Public API/client/types no longer expose `agent.context_window.snapshot`.\n",
+          "internal.retry_count.start": 0,
+          "failure_class": "",
+          "graph.model_stylesheet": "\n            * { model: claude-opus-4-7; }\n        ",
+          "current_node": "start",
+          "graph.rankdir": "LR",
+          "internal.thread_id": null,
+          "failure_signature": "",
+          "internal.work_dir": "/home/daytona/workspace/fabro",
+          "internal.run_id": "01KSDGB3G5YAPQMCXKE23SF08C",
+          "internal.node_visit_count": 1,
+          "outcome": "succeeded"
+        },
+        "node_outcomes": {
+          "start": {
+            "status": "succeeded",
+            "usage": null
+          }
+        },
+        "next_node_id": "toolchain",
+        "node_visits": {
+          "start": 1
+        }
+      },
+      "diff": {}
+    },
+    {
+      "seq": 0,
+      "checkpoint": {
+        "timestamp": "2026-05-24T17:26:10.320923Z",
+        "current_node": "toolchain",
+        "completed_nodes": [
+          "start",
+          "toolchain"
+        ],
+        "node_retries": {},
+        "context_values": {
+          "internal.run_id": "01KSDGB3G5YAPQMCXKE23SF08C",
+          "graph.goal": "# Fold Context Window Into Agent Messages Implementation Plan\n\n> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.\n\n**Goal:** Remove the chatty `agent.context_window.snapshot` event and persist context-window data through existing `agent.message` events.\n\n**Architecture:** Compute the context-window breakdown locally while the agent still has the exact request, attach the final content-free projection to the next `agent.message`, and let the run projection reducer store that latest projection for `GET /runs/{id}/stages/{stageId}/context-window`. Do not call provider token-count APIs during normal execution.\n\n**Tech Stack:** Rust, Serde, Fabro agent/session events, Fabro workflow event conversion, Fabro store projections, OpenAPI/progenitor, generated TypeScript client, React/SWR.\n\n---\n\n## Scope And Decisions\n\n- Remove `agent.context_window.snapshot` completely from new code. This is a greenfield/no-prod app, so do not preserve backward-compatible deserialization or frontend handling for old snapshot events.\n- Keep `StageContextWindowProjection`, `StageContextWindow`, `StageProjection.context_window`, and the existing context-window GET endpoint.\n- Add optional `context_window` data to `agent.message` properties.\n- Normal execution uses only local estimates and token usage returned by normal LLM responses.\n- Do not call `Client::count_input_tokens` from `fabro-agent::Session`.\n- The GET endpoint remains projection-backed for this pass. It must not require an in-memory session and must not trigger provider token-count API calls.\n- Failed-before-response turns do not persist context-window data.\n- Live pre-response context-window updates are not required. The UI updates after `agent.message`.\n\n## File Map\n\n- Modify `lib/crates/fabro-types/src/run_event/agent.rs`\n  - Add `context_window: Option<StageContextWindowProjection>` to `AgentMessageProps`.\n  - Remove `AgentContextWindowSnapshotProps`.\n- Modify `lib/crates/fabro-types/src/run_event/mod.rs`\n  - Remove the `AgentContextWindowSnapshot` event variant, name mapping, known-event entry, and serde tests.\n  - Update `agent.message` serde tests to cover optional context-window data.\n- Modify `lib/crates/fabro-agent/src/types.rs`\n  - Remove `AgentEvent::ContextWindowSnapshot`.\n  - Add `context_window: Option<StageContextWindowProjection>` to `AgentEvent::AssistantMessage`.\n- Modify `lib/crates/fabro-agent/src/session.rs`\n  - Remove async provider-count task and response-usage snapshot event emission.\n  - Keep local context-window snapshot construction at request-build time.\n  - Attach the scaled or local projection to `AssistantMessage`.\n- Keep `lib/crates/fabro-agent/src/context_window.rs`\n  - Reuse `build_local_snapshot` and `scaled_snapshot`.\n  - Remove only tests or helpers that exist solely for provider-count snapshot emission.\n- Modify `lib/crates/fabro-workflow/src/event/convert.rs`\n  - Remove conversion for `AgentEvent::ContextWindowSnapshot`.\n  - Copy `context_window` from `AgentEvent::AssistantMessage` into `AgentMessageProps`.\n- Modify `lib/crates/fabro-workflow/src/event/names.rs`\n  - Remove the snapshot event name.\n- Modify `lib/crates/fabro-store/src/run_state.rs`\n  - Remove reducer support for `EventBody::AgentContextWindowSnapshot`.\n  - When reducing `EventBody::AgentMessage`, copy `props.context_window` into `stage.context_window` when present and stamp `event_seq`.\n- Modify `lib/crates/fabro-server/src/server/tests.rs`\n  - Seed context-window endpoint tests with `agent.message` events that include context-window data.\n- Modify `docs/public/api-reference/fabro-api.yaml`\n  - Add optional `context_window` to `AgentMessageProps`.\n  - Remove the snapshot event schema/variant.\n- Regenerate/update `lib/packages/fabro-api-client/src`.\n- Modify `apps/fabro-web/app/lib/run-events.ts` and tests\n  - Remove special handling for `agent.context_window.snapshot`.\n  - Rely on existing `agent.message` invalidation for stage events and context-window data.\n\n## Implementation Steps\n\n### Task 1: Move The Event Contract Onto `agent.message`\n\n- [ ] Add optional `context_window` to Rust `AgentMessageProps`.\n- [ ] Remove `AgentContextWindowSnapshotProps` and the `agent.context_window.snapshot` `EventBody` variant.\n- [ ] Update run-event serde tests so `agent.message` round-trips with and without `context_window`.\n- [ ] Remove tests whose only assertion is that `agent.context_window.snapshot` is known or serializes.\n\n### Task 2: Stop Emitting Snapshot Events\n\n- [ ] Remove `AgentEvent::ContextWindowSnapshot` and its trace/debug handling.\n- [ ] Change `AgentEvent::AssistantMessage` to carry `context_window: Option<StageContextWindowProjection>`.\n- [ ] In `Session::run_single_input`, keep the local context-window snapshot returned from request construction.\n- [ ] Delete the spawned `count_input_tokens(... PreferProvider)` task and its fingerprint suppression state.\n- [ ] After the normal LLM response arrives, compute:\n  - `ResponseUsageScaledBreakdown` when response input/cache usage is positive.\n  - `LocalEstimate` when response usage has no usable input tokens.\n- [ ] Attach that projection to the emitted `AssistantMessage`.\n\n### Task 3: Update Workflow Conversion And Store Projection\n\n- [ ] Remove snapshot event name/conversion branches.\n- [ ] Include `context_window` when converting `AgentEvent::AssistantMessage` to `EventBody::AgentMessage`.\n- [ ] In the store reducer, update `stage.context_window` from `AgentMessageProps.context_window`.\n- [ ] Stamp the copied projection with the `agent.message` event sequence.\n- [ ] Replace store tests for snapshot replacement with message-carried context-window tests.\n\n### Task 4: Keep The GET Endpoint Projection-Backed\n\n- [ ] Keep the endpoint route and response type unchanged.\n- [ ] Keep existing `not_agent_stage`, `not_observed`, and terminal `stored` behavior.\n- [ ] Update endpoint tests to seed context-window data via `agent.message`.\n- [ ] Do not add endpoint-time provider token-count calls.\n\n### Task 5: Remove Frontend And API Trace\n\n- [ ] Remove frontend constants/tests for `agent.context_window.snapshot`.\n- [ ] Ensure `agent.message` still invalidates `stageContextWindow` through existing stage activity handling.\n- [ ] Update OpenAPI and regenerated TypeScript client so no snapshot event model remains.\n- [ ] Run a final search for `agent.context_window.snapshot`, `AgentContextWindowSnapshot`, and `ContextWindowSnapshot`; only historical docs or this plan may remain.\n\n## Test Plan\n\n- Run `cargo build -p fabro-api` after OpenAPI/Rust type changes.\n- Run targeted Rust tests:\n  - `cargo nextest run -p fabro-agent`\n  - `cargo nextest run -p fabro-workflow`\n  - `cargo nextest run -p fabro-store`\n  - `cargo nextest run -p fabro-server get_run_stage_context_window`\n  - `cargo nextest run -p fabro-types agent_message`\n- Regenerate TypeScript client with `cd lib/packages/fabro-api-client && bun run generate`.\n- Run web checks:\n  - `cd apps/fabro-web && bun test`\n  - `cd apps/fabro-web && bun run typecheck`\n  - `cd lib/packages/fabro-api-client && bun run typecheck`\n- Run final targeted searches:\n  - `rg -n \"agent\\\\.context_window\\\\.snapshot|AgentContextWindowSnapshot|ContextWindowSnapshot\" lib/crates apps/fabro-web lib/packages docs/public/api-reference/fabro-api.yaml`\n  - Expected: no implementation/API/frontend matches.\n\n## Acceptance Criteria\n\n- Normal agent runs do not emit `agent.context_window.snapshot`.\n- Normal agent runs do not call provider token-count endpoints for context-window reporting.\n- `agent.message` includes context-window data when the agent produced a response.\n- `GET /runs/{id}/stages/{stageId}/context-window` still returns the latest context-window projection.\n- The event log contains no standalone context-window snapshot events.\n- Public API/client/types no longer expose `agent.context_window.snapshot`.\n",
+          "graph.rankdir": "LR",
+          "internal.thread_id": "start",
+          "current_node": "toolchain",
+          "outcome": "succeeded",
+          "internal.work_dir": "/home/daytona/workspace/fabro",
+          "graph.model_stylesheet": "\n            * { model: claude-opus-4-7; }\n        ",
+          "failure_signature": "",
+          "command.output": "blob://sha256/fc14b2ba2d770e5cd3169df7a29525c962adfc4cfa3097b9098c63ebd61a748c",
+          "failure_class": "",
+          "internal.retry_count.toolchain": 0,
+          "internal.fidelity": "compact",
+          "internal.node_visit_count": 1,
+          "internal.retry_count.start": 0,
+          "thread.start.current_node": "toolchain"
+        },
+        "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
+          }
+        },
+        "next_node_id": "preflight_compile",
+        "node_visits": {
+          "start": 1,
+          "toolchain": 1
+        }
+      },
+      "diff": {}
+    }
+  ],
   "conclusion": null,
   "sandbox": {
     "provider": "daytona",
@@ -512,5 +604,67 @@
   "pull_request": null,
   "superseded_by": null,
   "pending_interviews": {},
-  "stages": {}
+  "stages": {
+    "start@1": {
+      "first_event_seq": 18,
+      "prompt": null,
+      "response": null,
+      "completion": {
+        "outcome": "succeeded",
+        "notes": null,
+        "failure_reason": null,
+        "timestamp": "2026-05-24T17:26:08.971925Z"
+      },
+      "provider_used": null,
+      "diff": null,
+      "script_invocation": null,
+      "script_timing": null,
+      "parallel_results": null,
+      "output": null,
+      "started_at": "2026-05-24T17:26:08.971618Z",
+      "handler": "start",
+      "timing": {
+        "wall_time_ms": 0,
+        "inference_time_ms": 0,
+        "tool_time_ms": 0,
+        "active_time_ms": 0
+      },
+      "usage": {
+        "input_tokens": 0,
+        "output_tokens": 0,
+        "total_tokens": 0,
+        "reasoning_tokens": 0,
+        "cache_read_tokens": 0,
+        "cache_write_tokens": 0
+      },
+      "state": "succeeded"
+    },
+    "toolchain@1": {
+      "first_event_seq": 22,
+      "prompt": null,
+      "response": null,
+      "completion": null,
+      "provider_used": null,
+      "diff": null,
+      "script_invocation": {
+        "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",
+        "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,
+      "parallel_results": null,
+      "output": null,
+      "started_at": "2026-05-24T17:26:08.972335Z",
+      "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"
+    }
+  }
 }
\ No newline at end of file
diff --git a/stages/001-start@1/status.json b/stages/001-start@1/status.json
new file mode 100644
index 000000000..028addb14
--- /dev/null
+++ b/stages/001-start@1/status.json
@@ -0,0 +1,6 @@
+{
+  "outcome": "succeeded",
+  "notes": null,
+  "failure_reason": null,
+  "timestamp": "2026-05-24T17:26:08.971925Z"
+}
\ No newline at end of file
diff --git a/stages/002-toolchain@1/script_invocation.json b/stages/002-toolchain@1/script_invocation.json
new file mode 100644
index 000000000..92c244949
--- /dev/null
+++ b/stages/002-toolchain@1/script_invocation.json
@@ -0,0 +1,5 @@
+{
+  "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",
+  "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"
+}
\ No newline at end of file