# Independent review of the autonomous candidate

An independent reviewer rejected your candidate pending correction. Read the
current diff and `BOOK_SELF_EVOLUTION_REPORT.md`, then address this exact finding
without expanding scope:

The real production path in
`agent.agent_runtime_helpers.convert_to_trajectory_format()` persists tool
results as one or more XML-wrapped JSON objects, for example:

```text
<tool_response>
{"tool_call_id": "...", "name": "...", "content": {"success": false}}
</tool_response>
```

`derive_trajectory_signals()` currently attempts `json.loads()` on the entire
wrapped value, so it reports zero tool errors for a real failed tool result.
The existing synthetic test uses bare JSON and therefore misses this
production/test-parity defect.

Derive conservative signals from the actual converted ShareGPT trajectory,
including multiple bundled `<tool_response>` entries and nested `content`.
Fail closed on malformed or unsupported shapes. Add an end-to-end behavior test
that passes a production-shaped internal assistant/tool exchange through the
real conversion path before saving and verifies the resulting failure signal.
Preserve the original trajectory messages byte-for-byte and keep the metadata
backward-compatible.

Run the focused tests, the existing trajectory-compressor tests, compilation,
and `git diff --check`. Update the report with this review round and exact
results. Do not claim downstream benefit without the separate ablation campaign,
do not push or commit, and do not edit the book repository.