diff --git a/checkpoint.json b/checkpoint.json
index cd327077f..d31764096 100644
--- a/checkpoint.json
+++ b/checkpoint.json
@@ -1,33 +1,40 @@
 {
-  "timestamp": "2026-03-16T14:22:58.697462Z",
-  "current_node": "preflight_lint",
+  "timestamp": "2026-03-16T14:24:45.775791Z",
+  "current_node": "implement",
   "completed_nodes": [
     "start",
     "toolchain",
     "preflight_compile",
-    "preflight_lint"
+    "preflight_lint",
+    "implement"
   ],
   "node_retries": {
     "preflight_compile": 1,
     "start": 1,
     "toolchain": 1,
-    "preflight_lint": 1
+    "preflight_lint": 1,
+    "implement": 1
   },
   "context_values": {
-    "internal.thread_id": "preflight_compile",
+    "internal.thread_id": "preflight_lint",
     "internal.retry_count.preflight_lint": 1,
     "thread.toolchain.current_node": "preflight_compile",
     "internal.run_id": "01KKVGBQG9B4QRPZGA5GZ7A4C6",
-    "current_node": "preflight_lint",
+    "current_node": "implement",
     "outcome": "success",
     "failure_signature": "",
     "internal.fidelity": "compact",
     "internal.node_visit_count": 1,
     "internal.retry_count.toolchain": 1,
     "command.stderr": "",
+    "last_response": "All 179 tests pass and clippy is clean. Here's a summary of the changes made:\n\n**File: `lib/crates/fabro-workflows/src/cli/runs.rs`**\n\n1. **Added `quiet` field to `RunsListArgs`** (after `all`):\n   ``",
+    "thread.preflight_lint.current_node": "implement",
     "internal.retry_count.preflight_compile": 1,
     "failure_class": "",
-    "current.preamble": "Goal: # Add `-q`/`--quiet` to `fabro ps`\n\n## Context\n`docker ps -q` outputs only container IDs (one per line). We want the same for `fabro ps` — output only run IDs.\n\n## Changes\n\n**File: `lib/crates/fabro-workflows/src/cli/runs.rs`**\n\n1. Add `quiet` field to `RunsListArgs` (after `all`, line ~45):\n   ```rust\n   /// Only display run IDs\n   #[arg(short = 'q', long)]\n   pub quiet: bool,\n   ```\n\n2. In `list_command()` (~line 474), add a quiet branch before the JSON branch:\n   ```rust\n   if args.quiet {\n       for run in &filtered {\n           println!(\"{}\", run.run_id);\n       }\n       return Ok(());\n   }\n   ```\n   - Prints full run IDs (not truncated), one per line, no header, no footer — matches `docker ps -q` behavior.\n   - Skips the \"no runs found\" messages (empty output = no runs, like docker).\n\n## Verification\n- `cargo test -p fabro-workflows`\n- `cargo clippy --workspace -- -D warnings`\n- Manual: `fabro ps -q`, `fabro ps -qa`, `fabro ps -q --json` (quiet takes precedence)\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",
+    "internal.retry_count.implement": 1,
+    "current.preamble": "Goal: # Add `-q`/`--quiet` to `fabro ps`\n\n## Context\n`docker ps -q` outputs only container IDs (one per line). We want the same for `fabro ps` — output only run IDs.\n\n## Changes\n\n**File: `lib/crates/fabro-workflows/src/cli/runs.rs`**\n\n1. Add `quiet` field to `RunsListArgs` (after `all`, line ~45):\n   ```rust\n   /// Only display run IDs\n   #[arg(short = 'q', long)]\n   pub quiet: bool,\n   ```\n\n2. In `list_command()` (~line 474), add a quiet branch before the JSON branch:\n   ```rust\n   if args.quiet {\n       for run in &filtered {\n           println!(\"{}\", run.run_id);\n       }\n       return Ok(());\n   }\n   ```\n   - Prints full run IDs (not truncated), one per line, no header, no footer — matches `docker ps -q` behavior.\n   - Skips the \"no runs found\" messages (empty output = no runs, like docker).\n\n## Verification\n- `cargo test -p fabro-workflows`\n- `cargo clippy --workspace -- -D warnings`\n- Manual: `fabro ps -q`, `fabro ps -qa`, `fabro ps -q --json` (quiet takes precedence)\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",
+    "response.implement": "All 179 tests pass and clippy is clean. Here's a summary of the changes made:\n\n**File: `lib/crates/fabro-workflows/src/cli/runs.rs`**\n\n1. **Added `quiet` field to `RunsListArgs`** (after `all`):\n   ```rust\n   /// Only display run IDs\n   #[arg(short = 'q', long)]\n   pub quiet: bool,\n   ```\n\n2. **Added quiet branch in `list_command()`** before the JSON branch:\n   ```rust\n   if args.quiet {\n       for run in &filtered {\n           println!(\"{}\", run.run_id);\n       }\n       return Ok(());\n   }\n   ```\n\nThis matches `docker ps -q` behavior:\n- Prints full run IDs (not truncated), one per line\n- No header, no footer\n- Empty output when no runs match (no \"no runs found\" messages)\n- Quiet takes precedence over JSON output\n- Combinable with `-a` (`fabro ps -qa`)",
+    "last_stage": "implement",
     "command.output": "",
     "internal.retry_count.start": 1,
     "graph.goal": "# Add `-q`/`--quiet` to `fabro ps`\n\n## Context\n`docker ps -q` outputs only container IDs (one per line). We want the same for `fabro ps` — output only run IDs.\n\n## Changes\n\n**File: `lib/crates/fabro-workflows/src/cli/runs.rs`**\n\n1. Add `quiet` field to `RunsListArgs` (after `all`, line ~45):\n   ```rust\n   /// Only display run IDs\n   #[arg(short = 'q', long)]\n   pub quiet: bool,\n   ```\n\n2. In `list_command()` (~line 474), add a quiet branch before the JSON branch:\n   ```rust\n   if args.quiet {\n       for run in &filtered {\n           println!(\"{}\", run.run_id);\n       }\n       return Ok(());\n   }\n   ```\n   - Prints full run IDs (not truncated), one per line, no header, no footer — matches `docker ps -q` behavior.\n   - Skips the \"no runs found\" messages (empty output = no runs, like docker).\n\n## Verification\n- `cargo test -p fabro-workflows`\n- `cargo clippy --workspace -- -D warnings`\n- Manual: `fabro ps -q`, `fabro ps -qa`, `fabro ps -q --json` (quiet takes precedence)\n",
@@ -51,6 +58,28 @@
       "notes": "Script completed: cargo clippy -q --workspace -- -D warnings 2>&1",
       "duration_ms": 15495
     },
+    "implement": {
+      "status": "success",
+      "context_updates": {
+        "last_response": "All 179 tests pass and clippy is clean. Here's a summary of the changes made:\n\n**File: `lib/crates/fabro-workflows/src/cli/runs.rs`**\n\n1. **Added `quiet` field to `RunsListArgs`** (after `all`):\n   ``",
+        "response.implement": "All 179 tests pass and clippy is clean. Here's a summary of the changes made:\n\n**File: `lib/crates/fabro-workflows/src/cli/runs.rs`**\n\n1. **Added `quiet` field to `RunsListArgs`** (after `all`):\n   ```rust\n   /// Only display run IDs\n   #[arg(short = 'q', long)]\n   pub quiet: bool,\n   ```\n\n2. **Added quiet branch in `list_command()`** before the JSON branch:\n   ```rust\n   if args.quiet {\n       for run in &filtered {\n           println!(\"{}\", run.run_id);\n       }\n       return Ok(());\n   }\n   ```\n\nThis matches `docker ps -q` behavior:\n- Prints full run IDs (not truncated), one per line\n- No header, no footer\n- Empty output when no runs match (no \"no runs found\" messages)\n- Quiet takes precedence over JSON output\n- Combinable with `-a` (`fabro ps -qa`)",
+        "last_stage": "implement"
+      },
+      "notes": "Stage completed: implement",
+      "usage": {
+        "model": "claude-opus-4-6",
+        "input_tokens": 4482,
+        "output_tokens": 1407,
+        "cache_read_tokens": 41297,
+        "cache_write_tokens": 8805,
+        "reasoning_tokens": 23,
+        "cost": 0.172755
+      },
+      "files_touched": [
+        "/home/daytona/workspace/lib/crates/fabro-workflows/src/cli/runs.rs"
+      ],
+      "duration_ms": 104259
+    },
     "toolchain": {
       "status": "success",
       "context_updates": {
@@ -70,9 +99,10 @@
       "duration_ms": 68585
     }
   },
-  "next_node_id": "implement",
+  "next_node_id": "simplify_opus",
   "node_visits": {
     "toolchain": 1,
+    "implement": 1,
     "start": 1,
     "preflight_compile": 1,
     "preflight_lint": 1
diff --git a/nodes/implement/prompt.md b/nodes/implement/prompt.md
new file mode 100644
index 000000000..c1c3ae655
--- /dev/null
+++ b/nodes/implement/prompt.md
@@ -0,0 +1,53 @@
+Goal: # Add `-q`/`--quiet` to `fabro ps`
+
+## Context
+`docker ps -q` outputs only container IDs (one per line). We want the same for `fabro ps` — output only run IDs.
+
+## Changes
+
+**File: `lib/crates/fabro-workflows/src/cli/runs.rs`**
+
+1. Add `quiet` field to `RunsListArgs` (after `all`, line ~45):
+   ```rust
+   /// Only display run IDs
+   #[arg(short = 'q', long)]
+   pub quiet: bool,
+   ```
+
+2. In `list_command()` (~line 474), add a quiet branch before the JSON branch:
+   ```rust
+   if args.quiet {
+       for run in &filtered {
+           println!("{}", run.run_id);
+       }
+       return Ok(());
+   }
+   ```
+   - Prints full run IDs (not truncated), one per line, no header, no footer — matches `docker ps -q` behavior.
+   - Skips the "no runs found" messages (empty output = no runs, like docker).
+
+## Verification
+- `cargo test -p fabro-workflows`
+- `cargo clippy --workspace -- -D warnings`
+- Manual: `fabro ps -q`, `fabro ps -qa`, `fabro ps -q --json` (quiet takes precedence)
+
+
+## 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.
\ No newline at end of file
diff --git a/nodes/implement/provider_used.json b/nodes/implement/provider_used.json
new file mode 100644
index 000000000..c1905ff10
--- /dev/null
+++ b/nodes/implement/provider_used.json
@@ -0,0 +1,5 @@
+{
+  "mode": "agent",
+  "provider": "anthropic",
+  "model": "claude-opus-4-6"
+}
\ No newline at end of file
diff --git a/nodes/implement/response.md b/nodes/implement/response.md
new file mode 100644
index 000000000..0bbd7cf7b
--- /dev/null
+++ b/nodes/implement/response.md
@@ -0,0 +1,27 @@
+All 179 tests pass and clippy is clean. Here's a summary of the changes made:
+
+**File: `lib/crates/fabro-workflows/src/cli/runs.rs`**
+
+1. **Added `quiet` field to `RunsListArgs`** (after `all`):
+   ```rust
+   /// Only display run IDs
+   #[arg(short = 'q', long)]
+   pub quiet: bool,
+   ```
+
+2. **Added quiet branch in `list_command()`** before the JSON branch:
+   ```rust
+   if args.quiet {
+       for run in &filtered {
+           println!("{}", run.run_id);
+       }
+       return Ok(());
+   }
+   ```
+
+This matches `docker ps -q` behavior:
+- Prints full run IDs (not truncated), one per line
+- No header, no footer
+- Empty output when no runs match (no "no runs found" messages)
+- Quiet takes precedence over JSON output
+- Combinable with `-a` (`fabro ps -qa`)
\ No newline at end of file
diff --git a/nodes/implement/status.json b/nodes/implement/status.json
new file mode 100644
index 000000000..b7177d9af
--- /dev/null
+++ b/nodes/implement/status.json
@@ -0,0 +1,6 @@
+{
+  "status": "success",
+  "notes": "Stage completed: implement",
+  "failure_reason": null,
+  "timestamp": "2026-03-16T14:24:45.775503+00:00"
+}
\ No newline at end of file