---
id: T01
parent: S01
milestone: M013
provides: []
requires: []
affects: []
key_files: ["backend/pipeline/quality/__init__.py", "backend/pipeline/quality/__main__.py", "backend/pipeline/quality/fitness.py"]
key_decisions: ["Connectivity probe as first action in run_all() for fast failure before running tests", "Mandelbrot test uses thinking modality to exercise both LLM modes", "Generous validation thresholds to avoid flaky failures from LLM variance"]
patterns_established: []
drill_down_paths: []
observability_surfaces: []
duration: ""
verification_result: "Import check passed: python -c 'from pipeline.quality.fitness import FitnessRunner' succeeds. CLI with no live LLM prints clear connectivity error and exits 1 (no traceback). Help and no-subcommand cases work correctly."
completed_at: 2026-04-01T08:45:02.672Z
blocker_discovered: false
---

# T01: Built pipeline.quality package with FitnessRunner (9 tests, 4 categories) and argparse CLI that prints formatted pass/fail report and exits 0/1

> Built pipeline.quality package with FitnessRunner (9 tests, 4 categories) and argparse CLI that prints formatted pass/fail report and exits 0/1

## What Happened
---
id: T01
parent: S01
milestone: M013
key_files:
  - backend/pipeline/quality/__init__.py
  - backend/pipeline/quality/__main__.py
  - backend/pipeline/quality/fitness.py
key_decisions:
  - Connectivity probe as first action in run_all() for fast failure before running tests
  - Mandelbrot test uses thinking modality to exercise both LLM modes
  - Generous validation thresholds to avoid flaky failures from LLM variance
duration: ""
verification_result: passed
completed_at: 2026-04-01T08:45:02.673Z
blocker_discovered: false
---

# T01: Built pipeline.quality package with FitnessRunner (9 tests, 4 categories) and argparse CLI that prints formatted pass/fail report and exits 0/1

**Built pipeline.quality package with FitnessRunner (9 tests, 4 categories) and argparse CLI that prints formatted pass/fail report and exits 0/1**

## What Happened

Created backend/pipeline/quality/ with __init__.py, __main__.py (argparse CLI with fitness subcommand), and fitness.py (FitnessRunner class). The runner implements 9 tests across 4 categories: Mandelbrot reasoning (thinking modality), JSON compliance (simple + nested with Pydantic validation), instruction following (bullet count, keyword, lowercase), and diverse battery (summarization, classification, extraction). Connectivity pre-check fails fast with clear endpoint URLs. Every test returns a TestResult dataclass — no crashes on malformed/empty responses.

## Verification

Import check passed: python -c 'from pipeline.quality.fitness import FitnessRunner' succeeds. CLI with no live LLM prints clear connectivity error and exits 1 (no traceback). Help and no-subcommand cases work correctly.

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `cd backend && python -c 'from pipeline.quality.fitness import FitnessRunner; print("import ok")'` | 0 | ✅ pass | 1000ms |
| 2 | `cd backend && python -m pipeline.quality fitness` | 1 | ✅ pass (expected connectivity error, no traceback) | 2000ms |


## Deviations

None.

## Known Issues

None.

## Files Created/Modified

- `backend/pipeline/quality/__init__.py`
- `backend/pipeline/quality/__main__.py`
- `backend/pipeline/quality/fitness.py`


## Deviations
None.

## Known Issues
None.
