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checkpoint

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Fabro 2026-03-19 11:24:47 -04:00
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commit e367f68cf3
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45
checkpoint.json
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@ -1,13 +1,15 @@
{
"timestamp": "2026-03-19T15:20:46.286203Z",
"current_node": "preflight_lint",
"timestamp": "2026-03-19T15:24:47.113617Z",
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"last_response": "Here's a summary of all changes made:\n\n### `lib/crates/fabro-util/src/telemetry/sender.rs` — rewritten\n\n**Writer side:**\n- Renamed `send(track: Track)` → `emit(tracks: &[Track])` — accepts a sli",
"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\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: # 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\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",
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"response.implement": "Here's a summary of all changes made:\n\n### `lib/crates/fabro-util/src/telemetry/sender.rs` — rewritten\n\n**Writer side:**\n- Renamed `send(track: Track)` → `emit(tracks: &[Track])` — accepts a slice of events\n- Early returns if `SEGMENT_WRITE_KEY` is `None` or `tracks` is empty\n- `spawn_sender` serializes each `Track` as a compact JSON line, joins with `\\n`, generates a `fabro-events-{uuid}.jsonl` filename\n\n**Reader side:**\n- Renamed `send_to_segment()` → `upload()` — reads file as string, delegates to `build_segment_batch`, POSTs to `/v1/batch`\n- New pure function `build_segment_batch(content: &str) -> Option<Value>` — parses each non-empty JSONL line, injects `\"type\": \"track\"`, wraps in `{\"batch\": [...]}`, skips malformed lines with `tracing::warn!`\n\n**Constants:**\n- `SEGMENT_API_URL` changed from `.../v1/track` to `.../v1/batch`\n- Added `use uuid::Uuid` (removed unused `Track.message_id` dependency for filename)\n\n**Tests (9 total, all passing):**\n1. `build_segment_batch_empty_content` — empty string returns `None`\n2. `build_segment_batch_single_event` — one line produces batch with `\"type\": \"track\"`\n3. `build_segment_batch_multiple_events` — two lines produce batch of 2\n4. `build_segment_batch_skips_malformed_lines` — bad JSON lines are skipped\n5. `build_segment_batch_all_malformed` — all bad lines returns `None`\n6. `build_segment_batch_skips_blank_lines` — blank lines are ignored\n7. `emit_noops_without_write_key` — no-ops without compile-time key\n8. `emit_noops_with_empty_tracks` — no-ops on empty slice\n9. `upload_noops_without_write_key` — errors without compile-time key\n\n### `lib/crates/fabro-cli/src/main.rs` — two call sites updated\n\n- Line 429: `sender::send(track)` → `sender::emit(&[track])`\n- Line 911: `sender::send_to_segment(&path)` → `sender::upload(&path)`\n\n### Unchanged files (as planned)\n- `event.rs`, `panic.rs`, `mod.rs`, `spawn.rs`, `anonymous_id.rs`, `context.rs`, `git.rs`, `sanitize.rs` — no changes needed",
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"last_response": "Here's a summary of all changes made:\n\n### `lib/crates/fabro-util/src/telemetry/sender.rs` — rewritten\n\n**Writer side:**\n- Renamed `send(track: Track)` → `emit(tracks: &[Track])` — accepts a sli",
"response.implement": "Here's a summary of all changes made:\n\n### `lib/crates/fabro-util/src/telemetry/sender.rs` — rewritten\n\n**Writer side:**\n- Renamed `send(track: Track)` → `emit(tracks: &[Track])` — accepts a slice of events\n- Early returns if `SEGMENT_WRITE_KEY` is `None` or `tracks` is empty\n- `spawn_sender` serializes each `Track` as a compact JSON line, joins with `\\n`, generates a `fabro-events-{uuid}.jsonl` filename\n\n**Reader side:**\n- Renamed `send_to_segment()` → `upload()` — reads file as string, delegates to `build_segment_batch`, POSTs to `/v1/batch`\n- New pure function `build_segment_batch(content: &str) -> Option<Value>` — parses each non-empty JSONL line, injects `\"type\": \"track\"`, wraps in `{\"batch\": [...]}`, skips malformed lines with `tracing::warn!`\n\n**Constants:**\n- `SEGMENT_API_URL` changed from `.../v1/track` to `.../v1/batch`\n- Added `use uuid::Uuid` (removed unused `Track.message_id` dependency for filename)\n\n**Tests (9 total, all passing):**\n1. `build_segment_batch_empty_content` — empty string returns `None`\n2. `build_segment_batch_single_event` — one line produces batch with `\"type\": \"track\"`\n3. `build_segment_batch_multiple_events` — two lines produce batch of 2\n4. `build_segment_batch_skips_malformed_lines` — bad JSON lines are skipped\n5. `build_segment_batch_all_malformed` — all bad lines returns `None`\n6. `build_segment_batch_skips_blank_lines` — blank lines are ignored\n7. `emit_noops_without_write_key` — no-ops without compile-time key\n8. `emit_noops_with_empty_tracks` — no-ops on empty slice\n9. `upload_noops_without_write_key` — errors without compile-time key\n\n### `lib/crates/fabro-cli/src/main.rs` — two call sites updated\n\n- Line 429: `sender::send(track)` → `sender::emit(&[track])`\n- Line 911: `sender::send_to_segment(&path)` → `sender::upload(&path)`\n\n### Unchanged files (as planned)\n- `event.rs`, `panic.rs`, `mod.rs`, `spawn.rs`, `anonymous_id.rs`, `context.rs`, `git.rs`, `sanitize.rs` — no changes needed",
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108
nodes/implement/prompt.md Normal file
View file

@ -0,0 +1,108 @@
Goal: # Plan: JSONL analytics event file format
## Context
Currently 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.
The panic sender (`__send_panic`) is unaffected — it stays single-JSON-per-file.
## Changes
### 1. `lib/crates/fabro-util/src/telemetry/sender.rs` — rewrite
**Writer — rename `send()` to `emit()`, accept multiple events:**
- `pub fn emit(tracks: &[Track])` (was `pub fn send(track: Track)`)
- Early return if `SEGMENT_WRITE_KEY` is `None` or `tracks` is empty
- Generate a UUID for the filename: `fabro-events-{uuid}.jsonl`
- Serialize each `Track` as a compact JSON line (`serde_json::to_string`), join with `\n`
- Pass the bytes to `spawn_fabro_subcommand("__send_analytics", &filename, &json)` as before
No file locking needed — each invocation writes its own uniquely-named file.
**Reader — rename `send_to_segment()` to `upload()`:**
- Read file contents as string
- Parse each non-empty line as `serde_json::Value`, inject `"type": "track"`, collect into batch array
- Skip malformed lines with `tracing::warn!`
- If no valid events, return `Ok(())`
- POST to `https://api.segment.io/v1/batch` with payload `{"batch": [...]}`
- Keep Basic auth the same
Extract a pure `fn build_segment_batch(content: &str) -> Option<Value>` for testability.
**Constants:**
- Change `SEGMENT_API_URL` from `.../v1/track` to `.../v1/batch`
### 2. `lib/crates/fabro-cli/src/main.rs`
**`send_telemetry_event()` (~line 428):** Change call from `sender::send(track)` to `sender::emit(&[track])`.
**`SendAnalytics` handler (~line 910):** Change call from `sender::send_to_segment(&path)` to `sender::upload(&path)`.
### 3. `lib/crates/fabro-util/src/telemetry/spawn.rs` — no changes
`spawn_fabro_subcommand` is generic (takes raw bytes). It continues to work for both JSONL analytics files and single-JSON panic files.
### 4. No changes to these files
- `event.rs` — `Track` struct unchanged
- `panic.rs` — stays single-JSON-per-file
- `mod.rs`, `anonymous_id.rs`, `context.rs`, `git.rs`, `sanitize.rs` — unchanged
## Implementation order (red/green TDD)
Write each test first (red), then implement just enough to make it pass (green).
### Step 1: `build_segment_batch` — pure function, no I/O
1. **Red:** Write test `build_segment_batch_empty_content` — empty string returns `None`
2. **Green:** Add `fn build_segment_batch(content: &str) -> Option<Value>` stub returning `None`
3. **Red:** Write test `build_segment_batch_single_event` — one JSONL line produces `{"batch": [{"type": "track", ...}]}`
4. **Green:** Implement line parsing, `"type": "track"` injection, batch wrapping
5. **Red:** Write test `build_segment_batch_multiple_events` — two lines produce batch of 2
6. **Green:** Should already pass
7. **Red:** Write test `build_segment_batch_skips_malformed_lines` — one good + one bad line produces batch of 1
8. **Green:** Add `continue` on parse error
### Step 2: `emit()` — writer side
9. **Red:** Update existing `send_noops_without_write_key` to use `emit(&[track])` signature
10. **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
### Step 3: `upload()` — reader side
11. **Red:** Write test `upload_noops_without_write_key` — same pattern as existing `send_panic_noops_without_dsn`
12. **Green:** Rename `send_to_segment` to `upload`, change internals to read file as string, call `build_segment_batch`, POST to `/v1/batch`
### Step 4: Wire up call sites in `main.rs`
13. Update `send_telemetry_event()` to call `sender::emit(&[track])`
14. Update `SendAnalytics` handler to call `sender::upload(&path)`
### Step 5: Final checks
```bash
cargo fmt --check --all
cargo clippy --workspace -- -D warnings
cargo test -p fabro-util
cargo test --workspace
```
## 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.

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{
"mode": "agent",
"provider": "anthropic",
"model": "claude-opus-4-6"
}

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Here's a summary of all changes made:
### `lib/crates/fabro-util/src/telemetry/sender.rs` — rewritten
**Writer side:**
- Renamed `send(track: Track)` → `emit(tracks: &[Track])` — accepts a slice of events
- Early returns if `SEGMENT_WRITE_KEY` is `None` or `tracks` is empty
- `spawn_sender` serializes each `Track` as a compact JSON line, joins with `\n`, generates a `fabro-events-{uuid}.jsonl` filename
**Reader side:**
- Renamed `send_to_segment()` → `upload()` — reads file as string, delegates to `build_segment_batch`, POSTs to `/v1/batch`
- New pure function `build_segment_batch(content: &str) -> Option<Value>` — parses each non-empty JSONL line, injects `"type": "track"`, wraps in `{"batch": [...]}`, skips malformed lines with `tracing::warn!`
**Constants:**
- `SEGMENT_API_URL` changed from `.../v1/track` to `.../v1/batch`
- Added `use uuid::Uuid` (removed unused `Track.message_id` dependency for filename)
**Tests (9 total, all passing):**
1. `build_segment_batch_empty_content` — empty string returns `None`
2. `build_segment_batch_single_event` — one line produces batch with `"type": "track"`
3. `build_segment_batch_multiple_events` — two lines produce batch of 2
4. `build_segment_batch_skips_malformed_lines` — bad JSON lines are skipped
5. `build_segment_batch_all_malformed` — all bad lines returns `None`
6. `build_segment_batch_skips_blank_lines` — blank lines are ignored
7. `emit_noops_without_write_key` — no-ops without compile-time key
8. `emit_noops_with_empty_tracks` — no-ops on empty slice
9. `upload_noops_without_write_key` — errors without compile-time key
### `lib/crates/fabro-cli/src/main.rs` — two call sites updated
- Line 429: `sender::send(track)` → `sender::emit(&[track])`
- Line 911: `sender::send_to_segment(&path)` → `sender::upload(&path)`
### Unchanged files (as planned)
- `event.rs`, `panic.rs`, `mod.rs`, `spawn.rs`, `anonymous_id.rs`, `context.rs`, `git.rs`, `sanitize.rs` — no changes needed

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{
"status": "success",
"notes": "Stage completed: implement",
"failure_reason": null,
"timestamp": "2026-03-19T15:24:47.113112+00:00"
}