Looking at this diff, I need to investigate several areas before rendering verdicts.

```json
[
  {"name": "project_dir_definition", "tool": "find_usages", "params": {"symbol": "PROJECT_DIR", "file_path": "expert_build/propose.py"}},
  {"name": "cmd_pipeline_full", "tool": "function_body", "params": {"file_path": "expert_build/pipeline.py", "function_name": "cmd_pipeline"}},
  {"name": "stage_extract_body", "tool": "function_body", "params": {"file_path": "expert_build/pipeline.py", "function_name": "_stage_extract"}},
  {"name": "work_dir_fixture", "tool": "function_body", "params": {"file_path": "tests/test_pipeline.py", "function_name": "work_dir"}},
  {"name": "state_file_usages", "tool": "find_usages", "params": {"symbol": "STATE_FILE"}},
  {"name": "pipeline_imports", "tool": "file_imports", "params": {"file_path": "expert_build/pipeline.py"}},
  {"name": "cmd_pipeline_callers", "tool": "find_callers", "params": {"symbol": "cmd_pipeline"}},
  {"name": "pipeline_tests", "tool": "related_test_files", "params": {"file_path": "expert_build/pipeline.py"}},
  {"name": "stage_ingest_raises", "tool": "raises_analysis", "params": {"file_path": "expert_build/pipeline.py", "function_name": "_stage_ingest"}},
  {"name": "propose_project_dir", "tool": "function_body", "params": {"file_path": "expert_build/propose.py", "function_name": "PROJECT_DIR"}}
]
```

Key concerns driving these requests:

1. **`STATE_FILE` as module-level constant**: It's built from `PROJECT_DIR` at import time. Need to verify `PROJECT_DIR` is a suitable base path and whether this creates test isolation problems — if `STATE_FILE` is a fixed global path, parallel tests or the `work_dir` fixture may not redirect it, causing cross-test contamination.

2. **Resume + convergence loop interaction**: Stages 4-7 inside the loop don't check `_stage_completed` individually — they rely on `current_cycle` to skip entire completed cycles. If the pipeline crashes mid-cycle (e.g., after derive completes but before review), resume will re-run the entire cycle including the already-completed derive. Need `cmd_pipeline` full body and `_stage_extract` to assess whether this is intentional/acceptable.

3. **`getattr(args, "resume", False)`**: The diff uses `getattr` defensively for `resume` but directly accesses `args.model`, `args.rounds` elsewhere. Need to verify callers always provide `resume` or understand why the asymmetry.

4. **Exception handling breadth**: The bare `except Exception` catches everything including `SystemExit` from `sys.exit()` — need to verify whether any stage functions call `sys.exit()` which would get caught and have its traceback saved rather than exiting cleanly.
