checkpoint

⚒️ Generated with [Fabro](https://fabro.sh)

checkpoint.json

@@ -0,0 +1,52 @@
+{
+  "timestamp": "2026-03-19T15:19:15.420078Z",
+  "current_node": "toolchain",
+  "completed_nodes": [
+    "start",
+    "toolchain"
+  ],
+  "node_retries": {
+    "start": 1,
+    "toolchain": 1
+  },
+  "context_values": {
+    "internal.fidelity": "compact",
+    "internal.thread_id": "start",
+    "command.output": "cargo 1.94.0 (85eff7c80 2026-01-15)\n",
+    "graph.goal": "# Plan: JSONL analytics event file format\n\n## Context\n\nCurrently each CLI invocation writes a single `Track` event as a standalone JSON file (`~/.fabro/tmp/fabro-event-{uuid}.json`) and spawns a detached subprocess to send it. We want to switch to JSONL format (one JSON event per line) so a single file can contain multiple events. Filenames keep a UUID for uniqueness. This enables callers to batch multiple events into one file/subprocess.\n\nThe panic sender (`__send_panic`) is unaffected — it stays single-JSON-per-file.\n\n## Changes\n\n### 1. `lib/crates/fabro-util/src/telemetry/sender.rs` — rewrite\n\n**Writer — rename `send()` to `emit()`, accept multiple events:**\n- `pub fn emit(tracks: &[Track])` (was `pub fn send(track: Track)`)\n- Early return if `SEGMENT_WRITE_KEY` is `None` or `tracks` is empty\n- Generate a UUID for the filename: `fabro-events-{uuid}.jsonl`\n- Serialize each `Track` as a compact JSON line (`serde_json::to_string`), join with `\\n`\n- Pass the bytes to `spawn_fabro_subcommand(\"__send_analytics\", &filename, &json)` as before\n\nNo file locking needed — each invocation writes its own uniquely-named file.\n\n**Reader — rename `send_to_segment()` to `upload()`:**\n- Read file contents as string\n- Parse each non-empty line as `serde_json::Value`, inject `\"type\": \"track\"`, collect into batch array\n- Skip malformed lines with `tracing::warn!`\n- If no valid events, return `Ok(())`\n- POST to `https://api.segment.io/v1/batch` with payload `{\"batch\": [...]}`\n- Keep Basic auth the same\n\nExtract a pure `fn build_segment_batch(content: &str) -> Option<Value>` for testability.\n\n**Constants:**\n- Change `SEGMENT_API_URL` from `.../v1/track` to `.../v1/batch`\n\n### 2. `lib/crates/fabro-cli/src/main.rs`\n\n**`send_telemetry_event()` (~line 428):** Change call from `sender::send(track)` to `sender::emit(&[track])`.\n\n**`SendAnalytics` handler (~line 910):** Change call from `sender::send_to_segment(&path)` to `sender::upload(&path)`.\n\n### 3. `lib/crates/fabro-util/src/telemetry/spawn.rs` — no changes\n\n`spawn_fabro_subcommand` is generic (takes raw bytes). It continues to work for both JSONL analytics files and single-JSON panic files.\n\n### 4. No changes to these files\n- `event.rs` — `Track` struct unchanged\n- `panic.rs` — stays single-JSON-per-file\n- `mod.rs`, `anonymous_id.rs`, `context.rs`, `git.rs`, `sanitize.rs` — unchanged\n\n## Implementation order (red/green TDD)\n\nWrite each test first (red), then implement just enough to make it pass (green).\n\n### Step 1: `build_segment_batch` — pure function, no I/O\n\n1. **Red:** Write test `build_segment_batch_empty_content` — empty string returns `None`\n2. **Green:** Add `fn build_segment_batch(content: &str) -> Option<Value>` stub returning `None`\n3. **Red:** Write test `build_segment_batch_single_event` — one JSONL line produces `{\"batch\": [{\"type\": \"track\", ...}]}`\n4. **Green:** Implement line parsing, `\"type\": \"track\"` injection, batch wrapping\n5. **Red:** Write test `build_segment_batch_multiple_events` — two lines produce batch of 2\n6. **Green:** Should already pass\n7. **Red:** Write test `build_segment_batch_skips_malformed_lines` — one good + one bad line produces batch of 1\n8. **Green:** Add `continue` on parse error\n\n### Step 2: `emit()` — writer side\n\n9. **Red:** Update existing `send_noops_without_write_key` to use `emit(&[track])` signature\n10. **Green:** Rename `send` to `emit`, change signature to `&[Track]`, serialize as JSONL (one JSON line per track, joined with `\\n`), generate `fabro-events-{uuid}.jsonl` filename\n\n### Step 3: `upload()` — reader side\n\n11. **Red:** Write test `upload_noops_without_write_key` — same pattern as existing `send_panic_noops_without_dsn`\n12. **Green:** Rename `send_to_segment` to `upload`, change internals to read file as string, call `build_segment_batch`, POST to `/v1/batch`\n\n### Step 4: Wire up call sites in `main.rs`\n\n13. Update `send_telemetry_event()` to call `sender::emit(&[track])`\n14. Update `SendAnalytics` handler to call `sender::upload(&path)`\n\n### Step 5: Final checks\n\n```bash\ncargo fmt --check --all\ncargo clippy --workspace -- -D warnings\ncargo test -p fabro-util\ncargo test --workspace\n```\n",
+    "current.preamble": "Goal: # Plan: JSONL analytics event file format\n\n## Context\n\nCurrently each CLI invocation writes a single `Track` event as a standalone JSON file (`~/.fabro/tmp/fabro-event-{uuid}.json`) and spawns a detached subprocess to send it. We want to switch to JSONL format (one JSON event per line) so a single file can contain multiple events. Filenames keep a UUID for uniqueness. This enables callers to batch multiple events into one file/subprocess.\n\nThe panic sender (`__send_panic`) is unaffected — it stays single-JSON-per-file.\n\n## Changes\n\n### 1. `lib/crates/fabro-util/src/telemetry/sender.rs` — rewrite\n\n**Writer — rename `send()` to `emit()`, accept multiple events:**\n- `pub fn emit(tracks: &[Track])` (was `pub fn send(track: Track)`)\n- Early return if `SEGMENT_WRITE_KEY` is `None` or `tracks` is empty\n- Generate a UUID for the filename: `fabro-events-{uuid}.jsonl`\n- Serialize each `Track` as a compact JSON line (`serde_json::to_string`), join with `\\n`\n- Pass the bytes to `spawn_fabro_subcommand(\"__send_analytics\", &filename, &json)` as before\n\nNo file locking needed — each invocation writes its own uniquely-named file.\n\n**Reader — rename `send_to_segment()` to `upload()`:**\n- Read file contents as string\n- Parse each non-empty line as `serde_json::Value`, inject `\"type\": \"track\"`, collect into batch array\n- Skip malformed lines with `tracing::warn!`\n- If no valid events, return `Ok(())`\n- POST to `https://api.segment.io/v1/batch` with payload `{\"batch\": [...]}`\n- Keep Basic auth the same\n\nExtract a pure `fn build_segment_batch(content: &str) -> Option<Value>` for testability.\n\n**Constants:**\n- Change `SEGMENT_API_URL` from `.../v1/track` to `.../v1/batch`\n\n### 2. `lib/crates/fabro-cli/src/main.rs`\n\n**`send_telemetry_event()` (~line 428):** Change call from `sender::send(track)` to `sender::emit(&[track])`.\n\n**`SendAnalytics` handler (~line 910):** Change call from `sender::send_to_segment(&path)` to `sender::upload(&path)`.\n\n### 3. `lib/crates/fabro-util/src/telemetry/spawn.rs` — no changes\n\n`spawn_fabro_subcommand` is generic (takes raw bytes). It continues to work for both JSONL analytics files and single-JSON panic files.\n\n### 4. No changes to these files\n- `event.rs` — `Track` struct unchanged\n- `panic.rs` — stays single-JSON-per-file\n- `mod.rs`, `anonymous_id.rs`, `context.rs`, `git.rs`, `sanitize.rs` — unchanged\n\n## Implementation order (red/green TDD)\n\nWrite each test first (red), then implement just enough to make it pass (green).\n\n### Step 1: `build_segment_batch` — pure function, no I/O\n\n1. **Red:** Write test `build_segment_batch_empty_content` — empty string returns `None`\n2. **Green:** Add `fn build_segment_batch(content: &str) -> Option<Value>` stub returning `None`\n3. **Red:** Write test `build_segment_batch_single_event` — one JSONL line produces `{\"batch\": [{\"type\": \"track\", ...}]}`\n4. **Green:** Implement line parsing, `\"type\": \"track\"` injection, batch wrapping\n5. **Red:** Write test `build_segment_batch_multiple_events` — two lines produce batch of 2\n6. **Green:** Should already pass\n7. **Red:** Write test `build_segment_batch_skips_malformed_lines` — one good + one bad line produces batch of 1\n8. **Green:** Add `continue` on parse error\n\n### Step 2: `emit()` — writer side\n\n9. **Red:** Update existing `send_noops_without_write_key` to use `emit(&[track])` signature\n10. **Green:** Rename `send` to `emit`, change signature to `&[Track]`, serialize as JSONL (one JSON line per track, joined with `\\n`), generate `fabro-events-{uuid}.jsonl` filename\n\n### Step 3: `upload()` — reader side\n\n11. **Red:** Write test `upload_noops_without_write_key` — same pattern as existing `send_panic_noops_without_dsn`\n12. **Green:** Rename `send_to_segment` to `upload`, change internals to read file as string, call `build_segment_batch`, POST to `/v1/batch`\n\n### Step 4: Wire up call sites in `main.rs`\n\n13. Update `send_telemetry_event()` to call `sender::emit(&[track])`\n14. Update `SendAnalytics` handler to call `sender::upload(&path)`\n\n### Step 5: Final checks\n\n```bash\ncargo fmt --check --all\ncargo clippy --workspace -- -D warnings\ncargo test -p fabro-util\ncargo test --workspace\n```\n\n",
+    "graph.model_stylesheet": "\n            * { backend: api; model: claude-opus-4-6;}\n        ",
+    "failure_signature": "",
+    "internal.node_visit_count": 1,
+    "internal.retry_count.toolchain": 1,
+    "command.stderr": "",
+    "internal.run_id": "01KM3AVN0Z99W7AX4PCVEB8C9J",
+    "graph.rankdir": "LR",
+    "current_node": "toolchain",
+    "internal.retry_count.start": 1,
+    "outcome": "success",
+    "failure_class": "",
+    "thread.start.current_node": "toolchain"
+  },
+  "logs": [],
+  "node_outcomes": {
+    "start": {
+      "status": "success",
+      "duration_ms": 0
+    },
+    "toolchain": {
+      "status": "success",
+      "context_updates": {
+        "command.stderr": "",
+        "command.output": "cargo 1.94.0 (85eff7c80 2026-01-15)\n"
+      },
+      "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",
+      "duration_ms": 123
+    }
+  },
+  "next_node_id": "preflight_compile",
+  "node_visits": {
+    "start": 1,
+    "toolchain": 1
+  }
+}

nodes/start/status.json

@@ -0,0 +1,6 @@
+{
+  "status": "success",
+  "notes": null,
+  "failure_reason": null,
+  "timestamp": "2026-03-19T15:19:15.287863+00:00"
+}

nodes/toolchain/script_invocation.json

@@ -0,0 +1,5 @@
+{
+  "command": "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",
+  "language": "shell",
+  "timeout_ms": null
+}

nodes/toolchain/script_timing.json

@@ -0,0 +1,5 @@
+{
+  "duration_ms": 122,
+  "exit_code": 0,
+  "timed_out": false
+}

nodes/toolchain/status.json

@@ -0,0 +1,6 @@
+{
+  "status": "success",
+  "notes": "Script completed: command -v cargo >/dev/null || { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y && sudo ln -sf $HOME/.cargo/bin/* /usr/local/bin/; }; cargo --version 2>&1",
+  "failure_reason": null,
+  "timestamp": "2026-03-19T15:19:15.419822+00:00"
+}