# Step 9: build-test-report

## Read These Files First

Read the following files before editing:

- `/AGENTS.md`
- `/docs/build-test-reports/README.md`
- `/docs/implementation-plans/euler-beam-3d-implementation-plan.md`
- `/src/fesa/elements/euler_beam_3d.hpp`
- `/src/fesa/elements/euler_beam_3d.cpp`
- `/tests/unit/euler_beam_3d_local_stiffness_test.cpp`
- `/tests/unit/euler_beam_3d_transform_recovery_test.cpp`

## Task

Create `/docs/build-test-reports/euler-beam-3d-build-test.md`.

The report must record:

- feature id
- changed files observed for this phase
- command log summary with exit codes and short evidence tails
- validation results for:
  - harness self-test
  - CMake configure/build
  - CTest
  - feature-specific tests
- failure classification if anything failed
- explicit statement that this report does not approve reference verification or release readiness

Do not change source or tests in this step.

## Tests To Write First

- No C++ test is required in this documentation-only step.

## Acceptance Criteria

```powershell
ctest --test-dir build/msvc-debug --output-on-failure -C Debug -R "model_element_test|euler_beam_3d_(local_stiffness|transform_recovery)_test"
python -m unittest discover -s scripts -p "test_*.py"
python scripts/validate_workspace.py
```

## Verification Notes

1. Record actual command exit codes and concise output evidence.
2. If validation fails for an environment reason, mark the report `needs-environment-fix` and update this phase step as blocked.
3. Update `phases/euler-beam-3d/index.json` step 9:
   - success: `"status": "completed"`, `"summary": "3D Euler beam build/test report added"`
   - failure after retries: `"status": "error"`, `"error_message": "<specific error>"`
   - blocked: `"status": "blocked"`, `"blocked_reason": "<specific reason>"`

## Forbidden

- Do not modify source, tests, requirements, formulations, I/O contracts, or reference artifacts.