checkpoint

⚒️ Generated with [Fabro](https://fabro.sh)
2026-10-08 03:10:26 +00:00 · 2026-03-15 22:04:55 -04:00 · 2026-03-15 22:04:55 -04:00 · 03165a7e35
commit 03165a7e35
parent 8345417db2
5 changed files with 162 additions and 8 deletions
--- a/checkpoint.json
+++ b/checkpoint.json
@ -1,23 +1,27 @@
 {
-  "timestamp": "2026-03-16T02:00:24.568155Z",
-  "current_node": "preflight_lint",
+  "timestamp": "2026-03-16T02:04:55.416450Z",
+  "current_node": "implement",
  "completed_nodes": [
    "start",
    "toolchain",
    "preflight_compile",
-    "preflight_lint"
+    "preflight_lint",
+    "implement"
  ],
  "node_retries": {
    "preflight_lint": 1,
    "preflight_compile": 1,
    "start": 1,
+    "implement": 1,
    "toolchain": 1
  },
  "context_values": {
-    "internal.thread_id": "preflight_compile",
+    "last_stage": "implement",
+    "thread.preflight_lint.current_node": "implement",
+    "internal.thread_id": "preflight_lint",
    "internal.retry_count.start": 1,
    "thread.toolchain.current_node": "preflight_compile",
-    "current.preamble": "Goal: # Style SVG output from `fabro graph` and API\n\n## Context\n\nSVGs from `fabro graph` use raw Graphviz defaults (black strokes, white bg, Times-serif). The docs SVGs look much better: teal nodes, gray edges, Helvetica font, transparent bg, dark mode CSS. The goal is to make `fabro graph` and the API `get_graph` endpoint produce the same styled output without building a layout engine.\n\n## Approach: DOT defaults + SVG post-processing\n\n### Step 1: `inject_dot_style_defaults(source: &str) -> String` in `graph.rs`\n\nFind first `{`, insert after it:\n```dot\n    bgcolor=\"transparent\"\n    node [color=\"#357f9e\", fontname=\"Helvetica\", fontsize=12, fontcolor=\"#1a1a1a\"]\n    edge [color=\"#666666\", fontname=\"Helvetica\", fontsize=10, fontcolor=\"#666666\"]\n```\nThese are DOT defaults — per-node/edge attrs override them. Applies to both SVG and PNG.\n\n### Step 2: `postprocess_svg(raw: Vec<u8>) -> Vec<u8>` in `graph.rs`\n\nSVG-only. Two string operations:\n1. Remove line containing `<polygon fill=\"white\" stroke=\"none\"` (the white background)\n2. Insert dark mode `<style>` block after the `<svg ...>` closing `>`\n\n### Step 3: Wire into `render_dot()` in `graph.rs`\n\n- Call `inject_dot_style_defaults` on source before piping to `dot`\n- Call `postprocess_svg` on output when format is SVG\n\n### Step 4: Wire into `get_graph()` in `server.rs` (line ~1440, ~1467, ~1472)\n\n- Wrap `dot_source` with `inject_dot_style_defaults`\n- Wrap `output.stdout` with `postprocess_svg`\n\n### Step 5: Wire into `get_run_graph()` in `demo/mod.rs` (line ~227, ~248, ~252)\n\nSame two wraps.\n\n### Step 6: Tests in `graph.rs`\n\n- `inject_dot_style_defaults` inserts expected attrs\n- `inject_dot_style_defaults` returns unchanged if no `{`\n- `postprocess_svg` removes white background\n- `postprocess_svg` injects dark mode style block\n- Update `graph_valid_workflow_svg` to assert styled output\n\n## Files to modify\n\n1. `lib/crates/fabro-workflows/src/cli/graph.rs` — add 2 pub fns, modify `render_dot`, add tests\n2. `lib/crates/fabro-api/src/server.rs` — 2-line change in `get_graph`\n3. `lib/crates/fabro-api/src/demo/mod.rs` — 2-line change in `get_run_graph`\n\n## Verification\n\n1. `cargo test -p fabro-workflows -- graph` — unit tests pass\n2. `cargo test -p fabro-api` — API tests pass\n3. `cargo clippy --workspace -- -D warnings` — no warnings\n4. `fabro graph fabro/workflows/implement/workflow.fabro -o /tmp/test.svg` — visually inspect:\n   - Teal node strokes, gray edges, Helvetica font\n   - No white background\n   - Dark mode `<style>` block present\n   - Compare with `docs/images/tutorial-plan-implement.svg`\n\n\n## Completed stages\n- **toolchain**: success\n  - 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`\n  - Stdout:\n    ```\n    cargo 1.94.0 (85eff7c80 2026-01-15)\n    ```\n  - Stderr: (empty)\n- **preflight_compile**: success\n  - Script: `cargo check -q --workspace 2>&1`\n  - Stdout: (empty)\n  - Stderr: (empty)\n",
+    "current.preamble": "Goal: # Style SVG output from `fabro graph` and API\n\n## Context\n\nSVGs from `fabro graph` use raw Graphviz defaults (black strokes, white bg, Times-serif). The docs SVGs look much better: teal nodes, gray edges, Helvetica font, transparent bg, dark mode CSS. The goal is to make `fabro graph` and the API `get_graph` endpoint produce the same styled output without building a layout engine.\n\n## Approach: DOT defaults + SVG post-processing\n\n### Step 1: `inject_dot_style_defaults(source: &str) -> String` in `graph.rs`\n\nFind first `{`, insert after it:\n```dot\n    bgcolor=\"transparent\"\n    node [color=\"#357f9e\", fontname=\"Helvetica\", fontsize=12, fontcolor=\"#1a1a1a\"]\n    edge [color=\"#666666\", fontname=\"Helvetica\", fontsize=10, fontcolor=\"#666666\"]\n```\nThese are DOT defaults — per-node/edge attrs override them. Applies to both SVG and PNG.\n\n### Step 2: `postprocess_svg(raw: Vec<u8>) -> Vec<u8>` in `graph.rs`\n\nSVG-only. Two string operations:\n1. Remove line containing `<polygon fill=\"white\" stroke=\"none\"` (the white background)\n2. Insert dark mode `<style>` block after the `<svg ...>` closing `>`\n\n### Step 3: Wire into `render_dot()` in `graph.rs`\n\n- Call `inject_dot_style_defaults` on source before piping to `dot`\n- Call `postprocess_svg` on output when format is SVG\n\n### Step 4: Wire into `get_graph()` in `server.rs` (line ~1440, ~1467, ~1472)\n\n- Wrap `dot_source` with `inject_dot_style_defaults`\n- Wrap `output.stdout` with `postprocess_svg`\n\n### Step 5: Wire into `get_run_graph()` in `demo/mod.rs` (line ~227, ~248, ~252)\n\nSame two wraps.\n\n### Step 6: Tests in `graph.rs`\n\n- `inject_dot_style_defaults` inserts expected attrs\n- `inject_dot_style_defaults` returns unchanged if no `{`\n- `postprocess_svg` removes white background\n- `postprocess_svg` injects dark mode style block\n- Update `graph_valid_workflow_svg` to assert styled output\n\n## Files to modify\n\n1. `lib/crates/fabro-workflows/src/cli/graph.rs` — add 2 pub fns, modify `render_dot`, add tests\n2. `lib/crates/fabro-api/src/server.rs` — 2-line change in `get_graph`\n3. `lib/crates/fabro-api/src/demo/mod.rs` — 2-line change in `get_run_graph`\n\n## Verification\n\n1. `cargo test -p fabro-workflows -- graph` — unit tests pass\n2. `cargo test -p fabro-api` — API tests pass\n3. `cargo clippy --workspace -- -D warnings` — no warnings\n4. `fabro graph fabro/workflows/implement/workflow.fabro -o /tmp/test.svg` — visually inspect:\n   - Teal node strokes, gray edges, Helvetica font\n   - No white background\n   - Dark mode `<style>` block present\n   - Compare with `docs/images/tutorial-plan-implement.svg`\n\n\n## Completed stages\n- **toolchain**: success\n  - 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`\n  - Stdout:\n    ```\n    cargo 1.94.0 (85eff7c80 2026-01-15)\n    ```\n  - Stderr: (empty)\n- **preflight_compile**: success\n  - Script: `cargo check -q --workspace 2>&1`\n  - Stdout: (empty)\n  - Stderr: (empty)\n- **preflight_lint**: success\n  - Script: `cargo clippy -q --workspace -- -D warnings 2>&1`\n  - Stdout: (empty)\n  - Stderr: (empty)\n",
    "internal.run_id": "01KKT5VWYY8VQFETNRC7RTYKDW",
    "failure_class": "",
    "outcome": "success",
@ -25,7 +29,7 @@
    "internal.retry_count.preflight_lint": 1,
    "internal.node_visit_count": 1,
    "internal.fidelity": "compact",
-    "current_node": "preflight_lint",
+    "current_node": "implement",
    "graph.rankdir": "LR",
    "internal.retry_count.toolchain": 1,
    "command.output": "",
@ -34,7 +38,10 @@
    "thread.preflight_compile.current_node": "preflight_lint",
    "graph.goal": "# Style SVG output from `fabro graph` and API\n\n## Context\n\nSVGs from `fabro graph` use raw Graphviz defaults (black strokes, white bg, Times-serif). The docs SVGs look much better: teal nodes, gray edges, Helvetica font, transparent bg, dark mode CSS. The goal is to make `fabro graph` and the API `get_graph` endpoint produce the same styled output without building a layout engine.\n\n## Approach: DOT defaults + SVG post-processing\n\n### Step 1: `inject_dot_style_defaults(source: &str) -> String` in `graph.rs`\n\nFind first `{`, insert after it:\n```dot\n    bgcolor=\"transparent\"\n    node [color=\"#357f9e\", fontname=\"Helvetica\", fontsize=12, fontcolor=\"#1a1a1a\"]\n    edge [color=\"#666666\", fontname=\"Helvetica\", fontsize=10, fontcolor=\"#666666\"]\n```\nThese are DOT defaults — per-node/edge attrs override them. Applies to both SVG and PNG.\n\n### Step 2: `postprocess_svg(raw: Vec<u8>) -> Vec<u8>` in `graph.rs`\n\nSVG-only. Two string operations:\n1. Remove line containing `<polygon fill=\"white\" stroke=\"none\"` (the white background)\n2. Insert dark mode `<style>` block after the `<svg ...>` closing `>`\n\n### Step 3: Wire into `render_dot()` in `graph.rs`\n\n- Call `inject_dot_style_defaults` on source before piping to `dot`\n- Call `postprocess_svg` on output when format is SVG\n\n### Step 4: Wire into `get_graph()` in `server.rs` (line ~1440, ~1467, ~1472)\n\n- Wrap `dot_source` with `inject_dot_style_defaults`\n- Wrap `output.stdout` with `postprocess_svg`\n\n### Step 5: Wire into `get_run_graph()` in `demo/mod.rs` (line ~227, ~248, ~252)\n\nSame two wraps.\n\n### Step 6: Tests in `graph.rs`\n\n- `inject_dot_style_defaults` inserts expected attrs\n- `inject_dot_style_defaults` returns unchanged if no `{`\n- `postprocess_svg` removes white background\n- `postprocess_svg` injects dark mode style block\n- Update `graph_valid_workflow_svg` to assert styled output\n\n## Files to modify\n\n1. `lib/crates/fabro-workflows/src/cli/graph.rs` — add 2 pub fns, modify `render_dot`, add tests\n2. `lib/crates/fabro-api/src/server.rs` — 2-line change in `get_graph`\n3. `lib/crates/fabro-api/src/demo/mod.rs` — 2-line change in `get_run_graph`\n\n## Verification\n\n1. `cargo test -p fabro-workflows -- graph` — unit tests pass\n2. `cargo test -p fabro-api` — API tests pass\n3. `cargo clippy --workspace -- -D warnings` — no warnings\n4. `fabro graph fabro/workflows/implement/workflow.fabro -o /tmp/test.svg` — visually inspect:\n   - Teal node strokes, gray edges, Helvetica font\n   - No white background\n   - Dark mode `<style>` block present\n   - Compare with `docs/images/tutorial-plan-implement.svg`\n",
    "failure_signature": "",
-    "thread.start.current_node": "toolchain"
+    "thread.start.current_node": "toolchain",
+    "internal.retry_count.implement": 1,
+    "last_response": "Everything looks good. Let me provide a summary of all changes made:\n\n## Summary\n\n### Changes made across 3 files:\n\n**1. `lib/crates/fabro-workflows/src/cli/graph.rs`** — Core implementation + tests",
+    "response.implement": "Everything looks good. Let me provide a summary of all changes made:\n\n## Summary\n\n### Changes made across 3 files:\n\n**1. `lib/crates/fabro-workflows/src/cli/graph.rs`** — Core implementation + tests\n\n- Added `DARK_MODE_STYLE` constant — CSS `<style>` block with `@media (prefers-color-scheme: dark)` that adjusts text fill, stroke colors, and polygon fills for dark mode viewing\n- Added `pub fn inject_dot_style_defaults(source: &str) -> String` — Inserts DOT graph-level defaults (`bgcolor=\"transparent\"`, teal node styling with `#357f9e`, gray edge styling with `#666666`, Helvetica font) after the first `{` in DOT source. Returns unchanged if no `{` found.\n- Added `pub fn postprocess_svg(raw: Vec<u8>) -> Vec<u8>` — Removes the white background `<polygon>` line and inserts the dark mode `<style>` block after the opening `<svg ...>` tag\n- Modified `render_dot()` — Calls `inject_dot_style_defaults` on source before piping to `dot`, and calls `postprocess_svg` on output when format is SVG\n- Added 4 new unit tests: `inject_dot_style_defaults_inserts_attrs`, `inject_dot_style_defaults_no_brace`, `postprocess_svg_removes_white_bg`, `postprocess_svg_injects_dark_mode`\n- Updated `graph_valid_workflow_svg` test to assert dark mode style block is present and white background is removed\n\n**2. `lib/crates/fabro-api/src/server.rs`** — API `get_graph` endpoint\n\n- Wrapped `dot_source` with `inject_dot_style_defaults` before piping to `dot`\n- Wrapped `output.stdout` with `postprocess_svg` in the success response\n\n**3. `lib/crates/fabro-api/src/demo/mod.rs`** — Demo `get_run_graph` endpoint\n\n- Same two wraps: `inject_dot_style_defaults` on the DOT source, `postprocess_svg` on the output\n\n### Verification results:\n- ✅ `cargo test -p fabro-workflows -- graph` — 108 tests pass (including 4 new + 1 updated)\n- ✅ `cargo test -p fabro-api` — 76 tests pass (62 unit + 14 integration)\n- ✅ `cargo clippy --workspace -- -D warnings` — zero warnings"
  },
  "logs": [],
  "node_outcomes": {
@ -56,6 +63,30 @@
      "notes": "Script completed: cargo clippy -q --workspace -- -D warnings 2>&1",
      "duration_ms": 16369
    },
+    "implement": {
+      "status": "success",
+      "context_updates": {
+        "response.implement": "Everything looks good. Let me provide a summary of all changes made:\n\n## Summary\n\n### Changes made across 3 files:\n\n**1. `lib/crates/fabro-workflows/src/cli/graph.rs`** — Core implementation + tests\n\n- Added `DARK_MODE_STYLE` constant — CSS `<style>` block with `@media (prefers-color-scheme: dark)` that adjusts text fill, stroke colors, and polygon fills for dark mode viewing\n- Added `pub fn inject_dot_style_defaults(source: &str) -> String` — Inserts DOT graph-level defaults (`bgcolor=\"transparent\"`, teal node styling with `#357f9e`, gray edge styling with `#666666`, Helvetica font) after the first `{` in DOT source. Returns unchanged if no `{` found.\n- Added `pub fn postprocess_svg(raw: Vec<u8>) -> Vec<u8>` — Removes the white background `<polygon>` line and inserts the dark mode `<style>` block after the opening `<svg ...>` tag\n- Modified `render_dot()` — Calls `inject_dot_style_defaults` on source before piping to `dot`, and calls `postprocess_svg` on output when format is SVG\n- Added 4 new unit tests: `inject_dot_style_defaults_inserts_attrs`, `inject_dot_style_defaults_no_brace`, `postprocess_svg_removes_white_bg`, `postprocess_svg_injects_dark_mode`\n- Updated `graph_valid_workflow_svg` test to assert dark mode style block is present and white background is removed\n\n**2. `lib/crates/fabro-api/src/server.rs`** — API `get_graph` endpoint\n\n- Wrapped `dot_source` with `inject_dot_style_defaults` before piping to `dot`\n- Wrapped `output.stdout` with `postprocess_svg` in the success response\n\n**3. `lib/crates/fabro-api/src/demo/mod.rs`** — Demo `get_run_graph` endpoint\n\n- Same two wraps: `inject_dot_style_defaults` on the DOT source, `postprocess_svg` on the output\n\n### Verification results:\n- ✅ `cargo test -p fabro-workflows -- graph` — 108 tests pass (including 4 new + 1 updated)\n- ✅ `cargo test -p fabro-api` — 76 tests pass (62 unit + 14 integration)\n- ✅ `cargo clippy --workspace -- -D warnings` — zero warnings",
+        "last_response": "Everything looks good. Let me provide a summary of all changes made:\n\n## Summary\n\n### Changes made across 3 files:\n\n**1. `lib/crates/fabro-workflows/src/cli/graph.rs`** — Core implementation + tests",
+        "last_stage": "implement"
+      },
+      "notes": "Stage completed: implement",
+      "usage": {
+        "model": "claude-opus-4-6",
+        "input_tokens": 37563,
+        "output_tokens": 7761,
+        "cache_read_tokens": 383259,
+        "cache_write_tokens": 37057,
+        "reasoning_tokens": 47,
+        "cost": 1.1455199999999999
+      },
+      "files_touched": [
+        "/home/daytona/workspace/lib/crates/fabro-api/src/demo/mod.rs",
+        "/home/daytona/workspace/lib/crates/fabro-api/src/server.rs",
+        "/home/daytona/workspace/lib/crates/fabro-workflows/src/cli/graph.rs"
+      ],
+      "duration_ms": 268508
+    },
    "preflight_compile": {
      "status": "success",
      "context_updates": {
@ -70,9 +101,10 @@
      "duration_ms": 0
    }
  },
-  "next_node_id": "implement",
+  "next_node_id": "simplify_opus",
  "node_visits": {
    "preflight_lint": 1,
+    "implement": 1,
    "start": 1,
    "toolchain": 1,
    "preflight_compile": 1
--- a/nodes/implement/prompt.md
+++ b/nodes/implement/prompt.md
@ -0,0 +1,83 @@
+Goal: # Style SVG output from `fabro graph` and API
+
+## Context
+
+SVGs from `fabro graph` use raw Graphviz defaults (black strokes, white bg, Times-serif). The docs SVGs look much better: teal nodes, gray edges, Helvetica font, transparent bg, dark mode CSS. The goal is to make `fabro graph` and the API `get_graph` endpoint produce the same styled output without building a layout engine.
+
+## Approach: DOT defaults + SVG post-processing
+
+### Step 1: `inject_dot_style_defaults(source: &str) -> String` in `graph.rs`
+
+Find first `{`, insert after it:
+```dot
+    bgcolor="transparent"
+    node [color="#357f9e", fontname="Helvetica", fontsize=12, fontcolor="#1a1a1a"]
+    edge [color="#666666", fontname="Helvetica", fontsize=10, fontcolor="#666666"]
+```
+These are DOT defaults — per-node/edge attrs override them. Applies to both SVG and PNG.
+
+### Step 2: `postprocess_svg(raw: Vec<u8>) -> Vec<u8>` in `graph.rs`
+
+SVG-only. Two string operations:
+1. Remove line containing `<polygon fill="white" stroke="none"` (the white background)
+2. Insert dark mode `<style>` block after the `<svg ...>` closing `>`
+
+### Step 3: Wire into `render_dot()` in `graph.rs`
+
+- Call `inject_dot_style_defaults` on source before piping to `dot`
+- Call `postprocess_svg` on output when format is SVG
+
+### Step 4: Wire into `get_graph()` in `server.rs` (line ~1440, ~1467, ~1472)
+
+- Wrap `dot_source` with `inject_dot_style_defaults`
+- Wrap `output.stdout` with `postprocess_svg`
+
+### Step 5: Wire into `get_run_graph()` in `demo/mod.rs` (line ~227, ~248, ~252)
+
+Same two wraps.
+
+### Step 6: Tests in `graph.rs`
+
+- `inject_dot_style_defaults` inserts expected attrs
+- `inject_dot_style_defaults` returns unchanged if no `{`
+- `postprocess_svg` removes white background
+- `postprocess_svg` injects dark mode style block
+- Update `graph_valid_workflow_svg` to assert styled output
+
+## Files to modify
+
+1. `lib/crates/fabro-workflows/src/cli/graph.rs` — add 2 pub fns, modify `render_dot`, add tests
+2. `lib/crates/fabro-api/src/server.rs` — 2-line change in `get_graph`
+3. `lib/crates/fabro-api/src/demo/mod.rs` — 2-line change in `get_run_graph`
+
+## Verification
+
+1. `cargo test -p fabro-workflows -- graph` — unit tests pass
+2. `cargo test -p fabro-api` — API tests pass
+3. `cargo clippy --workspace -- -D warnings` — no warnings
+4. `fabro graph fabro/workflows/implement/workflow.fabro -o /tmp/test.svg` — visually inspect:
+   - Teal node strokes, gray edges, Helvetica font
+   - No white background
+   - Dark mode `<style>` block present
+   - Compare with `docs/images/tutorial-plan-implement.svg`
+
+
+## Completed stages
+- **toolchain**: success
+  - 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`
+  - Stdout:
+    ```
+    cargo 1.94.0 (85eff7c80 2026-01-15)
+    ```
+  - Stderr: (empty)
+- **preflight_compile**: success
+  - Script: `cargo check -q --workspace 2>&1`
+  - Stdout: (empty)
+  - Stderr: (empty)
+- **preflight_lint**: success
+  - Script: `cargo clippy -q --workspace -- -D warnings 2>&1`
+  - Stdout: (empty)
+  - Stderr: (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.
--- a/nodes/implement/provider_used.json
+++ b/nodes/implement/provider_used.json
@ -0,0 +1,5 @@
+{
+  "mode": "agent",
+  "provider": "anthropic",
+  "model": "claude-opus-4-6"
+}
--- a/nodes/implement/response.md
+++ b/nodes/implement/response.md
@ -0,0 +1,28 @@
+Everything looks good. Let me provide a summary of all changes made:
+
+## Summary
+
+### Changes made across 3 files:
+
+**1. `lib/crates/fabro-workflows/src/cli/graph.rs`** — Core implementation + tests
+
+- Added `DARK_MODE_STYLE` constant — CSS `<style>` block with `@media (prefers-color-scheme: dark)` that adjusts text fill, stroke colors, and polygon fills for dark mode viewing
+- Added `pub fn inject_dot_style_defaults(source: &str) -> String` — Inserts DOT graph-level defaults (`bgcolor="transparent"`, teal node styling with `#357f9e`, gray edge styling with `#666666`, Helvetica font) after the first `{` in DOT source. Returns unchanged if no `{` found.
+- Added `pub fn postprocess_svg(raw: Vec<u8>) -> Vec<u8>` — Removes the white background `<polygon>` line and inserts the dark mode `<style>` block after the opening `<svg ...>` tag
+- Modified `render_dot()` — Calls `inject_dot_style_defaults` on source before piping to `dot`, and calls `postprocess_svg` on output when format is SVG
+- Added 4 new unit tests: `inject_dot_style_defaults_inserts_attrs`, `inject_dot_style_defaults_no_brace`, `postprocess_svg_removes_white_bg`, `postprocess_svg_injects_dark_mode`
+- Updated `graph_valid_workflow_svg` test to assert dark mode style block is present and white background is removed
+
+**2. `lib/crates/fabro-api/src/server.rs`** — API `get_graph` endpoint
+
+- Wrapped `dot_source` with `inject_dot_style_defaults` before piping to `dot`
+- Wrapped `output.stdout` with `postprocess_svg` in the success response
+
+**3. `lib/crates/fabro-api/src/demo/mod.rs`** — Demo `get_run_graph` endpoint
+
+- Same two wraps: `inject_dot_style_defaults` on the DOT source, `postprocess_svg` on the output
+
+### Verification results:
+- ✅ `cargo test -p fabro-workflows -- graph` — 108 tests pass (including 4 new + 1 updated)
+- ✅ `cargo test -p fabro-api` — 76 tests pass (62 unit + 14 integration)
+- ✅ `cargo clippy --workspace -- -D warnings` — zero warnings
--- a/nodes/implement/status.json
+++ b/nodes/implement/status.json
@ -0,0 +1,6 @@
+{
+  "status": "success",
+  "notes": "Stage completed: implement",
+  "failure_reason": null,
+  "timestamp": "2026-03-16T02:04:55.415534+00:00"
+}