[engine-failure] PROJ-101-quantifying-the-influence-of-initial-con @ tasks: RuntimeError

Automated report (spec 023 / FR-016) — an unexpected engine failure occurred while processing **PROJ-101-quantifying-the-influence-of-initial-con** at stage `tasks`.

```
RuntimeError: LLMReviewer[coverage]: review frontmatter has neither `verdict:` nor `concerns:`/`action_items:` — a contentless/truncated review MUST NOT count as acceptance (false-convergence guard). First 200 chars: '```yaml\n---\nreviewer_name: coverage\nreviewer_kind: llm\nstage: tasked\nartifact_path: projects/PROJ-101-quantifying-the-influence-of-initial-con/specs/001-quantifying-the-influence-of-initial-con/tasks.'
```

The project remains schedulable; it will retry on its normal cadence and recover once the underlying defect is fixed. Closing this issue does not require any project-state change.

Start with spec 023 / FR-016 and the LLMReviewer[coverage] path at the tasks stage; inspect how review frontmatter is parsed and how missing verdict, concerns, or action_items is handled. Done means a contentless or truncated review cannot count as acceptance and the normal retry recovers without project-state changes.

Written by the indexing model from the issue text.