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333787a417
This PR switches the analytics telemetry file format from
single-JSON-per-file to JSONL (one JSON event per line), enabling future
batching of multiple events into a single file and subprocess. Each file
is now named `fabro-events-{uuid}.jsonl` instead of
`fabro-event-{uuid}.json`, and the Segment API endpoint is updated from
`/v1/track` to `/v1/batch`.
The core changes are in `sender.rs`: `send(Track)` becomes
`emit(&[Track])`, which serializes each track as a compact JSON line;
`send_to_segment()` becomes `upload()`, which reads the JSONL file,
parses each line, injects `"type": "track"`, and POSTs the batch to
Segment. A new pure function `build_segment_batch()` is extracted for
testability, handling empty content, malformed lines (skipped with a
warning), and blank lines gracefully. The panic sender remains unchanged
as single-JSON-per-file.
The call sites in `main.rs` are updated to use the new `emit`/`upload`
signatures, and comprehensive tests are added covering the batch builder
(empty, single, multiple, malformed, blank lines), the emit no-op paths,
and the upload no-op behavior when `SEGMENT_WRITE_KEY` is unset.
### Fabro Details
<details>
<summary>Ran 10 stages in 17m 42s for $3.98</summary>
| Stage | Duration | Cost | Retries |
|---|---|---|---|
| start | 0s | – | 0 |
| toolchain | 0s | – | 0 |
| preflight_compile | 1m 11s | – | 0 |
| preflight_lint | 12s | – | 0 |
| implement | 3m 57s | $0.93 | 0 |
| simplify_opus | 3m 5s | $0.92 | 0 |
| simplify_gemini | 3m 56s | $1.17 | 0 |
| simplify_gpt | 3m 26s | $0.97 | 0 |
| verify | 1m 16s | – | 0 |
| fmt | 1s | – | 0 |
| **Total** | **17m 42s** | **$3.98** | **0** |
</details>
<details>
<summary>Ran <code>ImplementAndSimplify.fabro</code> (13 nodes and 16
edges)</summary>
```dot
digraph ImplementAndSimplify {
graph [
goal="Implement and simplify",
model_stylesheet="
* { backend: api; model: claude-opus-4-6;}
"
]
rankdir=LR
start [shape=Mdiamond, label="Start"]
exit [shape=Msquare, label="Exit"]
toolchain [label="Toolchain", shape=parallelogram, 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", max_retries=0]
preflight_compile [label="Preflight Compile", shape=parallelogram, script="cargo check -q --workspace 2>&1", max_retries=0]
preflight_lint [label="Preflight Lint", shape=parallelogram, script="cargo clippy -q --workspace -- -D warnings 2>&1", max_retries=0]
fix_lints [label="Fix Lints", prompt="The preflight lint step failed. Read the build output from context and fix all clippy lint warnings.", max_visits=3]
implement [label="Implement", prompt="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."]
simplify_opus [label="Simplify (Opus)", prompt="@prompts/simplify.md"]
simplify_gemini [label="Simplify (Gemini)", prompt="@prompts/simplify.md", model="gemini-3.1-pro-preview-customtools"]
simplify_gpt [label="Simplify (GPT-54)", prompt="@prompts/simplify.md", model="gpt-54"]
verify [label="Verify", shape=parallelogram, script="cargo clippy -q --workspace -- -D warnings 2>&1 && cargo nextest run --cargo-quiet --workspace --status-level fail 2>&1", goal_gate=true, retry_target="fixup"]
fixup [label="Fixup", prompt="The verify step failed. Read the build output from context and fix all clippy lint warnings and test failures.", max_visits=3]
fmt [label="Format", shape=parallelogram, script="cargo fmt --all 2>&1", max_retries=0]
start -> toolchain
toolchain -> preflight_compile [condition="outcome=success"]
toolchain -> exit
preflight_compile -> preflight_lint [condition="outcome=success"]
preflight_compile -> exit
preflight_lint -> implement [condition="outcome=success"]
preflight_lint -> fix_lints
fix_lints -> preflight_lint
implement -> simplify_opus -> simplify_gemini -> simplify_gpt -> verify
verify -> fmt [condition="outcome=success"]
verify -> fixup
fixup -> verify
fmt -> exit
}
```
</details>
⚒️ Generated with [Fabro](https://fabro.sh)
---------
Co-authored-by: Fabro <noreply@fabro.sh>
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| crates | ||
| packages/fabro-api-client | ||