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**Table of Contents**

- [Week 4: Metrics Tracking & Health Score Validation](#week-4-metrics-tracking--health-score-validation)
  - [Quick Start](#quick-start)
    - [Daily Workflow](#daily-workflow)
    - [First-Time Setup](#first-time-setup)
  - [What is Week 4?](#what-is-week-4)
  - [Health Score Targets](#health-score-targets)
    - [Week 4 Formula](#week-4-formula)
    - [Target Breakdown](#target-breakdown)
    - [How to Reach 85%](#how-to-reach-85)
  - [Daily Reports](#daily-reports)
    - [Report Location](#report-location)
    - [Report Contents](#report-contents)
    - [Example Report Structure](#example-report-structure)
  - [Interactive Dashboard](#interactive-dashboard)
    - [Features](#features)
    - [Dashboard Sections](#dashboard-sections)
    - [Example Dashboard Output](#example-dashboard-output)
  - [Metrics Validation](#metrics-validation)
    - [What Gets Tracked](#what-gets-tracked)
    - [How to Verify](#how-to-verify)
  - [Blocker Detection](#blocker-detection)
    - [Automatic Alerts](#automatic-alerts)
    - [Manual Review Triggers](#manual-review-triggers)
  - [Files & Structure](#files--structure)
    - [Directory Structure](#directory-structure)
    - [Key Files](#key-files)
  - [Success Criteria](#success-criteria)
    - [Daily Success](#daily-success)
    - [Week 4 Success](#week-4-success)
  - [Troubleshooting](#troubleshooting)
    - [Common Issues](#common-issues)
  - [Next Steps](#next-steps)
  - [References](#references)

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# Week 4: Metrics Tracking & Health Score Validation

**Health Score Journey:** 81% → 85% (Days 1-5)
**Coverage Journey:** 50% → 65%
**Tests Journey:** 464 → 560+

---

## Quick Start

### Daily Workflow

```bash
# 1. Run daily metrics (every day during Week 4)
./scripts/week4/daily_tracker.sh

# 2. View interactive dashboard
./scripts/week4/week4_dashboard.sh

# 3. Review daily report
cat docs/metrics/week4/daily/day*_$(date +%Y-%m-%d).md
```

### First-Time Setup

```bash
# Make scripts executable (already done)
chmod +x scripts/week4/*.sh

# Create directory structure (already done)
mkdir -p docs/metrics/week4/{daily,reports}

# Run Day 1 baseline
./scripts/week4/daily_tracker.sh
```

---

## What is Week 4?

Week 4 is **NOT an implementation week**. It's a **metrics validation week**.

**Purpose:**
- Track health score improvements daily
- Validate that 81% → 85% trajectory is on track
- Detect bottlenecks immediately
- Ensure testing targets are met
- Generate comprehensive progress reports

**NOT About:**
- Writing new features
- Major refactoring
- Architecture changes
- Performance optimization (unless blocking)

**IS About:**
- Running metrics daily
- Validating calculations
- Detecting regressions
- Trend analysis
- Automated reporting

---

## Health Score Targets

### Week 4 Formula

```
Health = (Compilation × 0.30) + (Testing × 0.25) + (Quality × 0.15) +
         (Security × 0.15) + (Performance × 0.10) + (Architecture × 0.05)
```

### Target Breakdown

| Day | Health Target | Coverage Target | Tests Target | Key Focus |
|-----|---------------|-----------------|--------------|-----------|
| **Day 1** | 81.0% | 55% | 464+ | Baseline, compilation fix |
| **Day 2** | 81.5% | 52% | 489+ | CLI tests (+25) |
| **Day 3** | 82.0% | 54% | 519+ | Utils/ontology tests (+55) |
| **Day 4** | 84.0% | 58% | 549+ | Marketplace tests (+85) |
| **Day 5** | 85.0% | 65% | 560+ | Final validation ✅ |

### How to Reach 85%

**Required Improvements:**
1. **Testing:** 50% → 65% (+15%) = +3.75% health contribution
2. **Security:** 82% → 85% (+3%) = +0.45% health contribution
3. **Performance:** 88% → 92% (+4%) = +0.4% health contribution
4. **Architecture:** 60% → 65% (+5%) = +0.25% health contribution

**Total Gain:** +4.85% (exceeds +4% target, providing buffer)

---

## Daily Reports

### Report Location

All daily reports are saved in:
```
docs/metrics/week4/daily/dayN_YYYY-MM-DD.md
```

### Report Contents

Each daily report includes:
- **Executive Summary** - Quick status overview
- **Health Score Breakdown** - Weighted dimension analysis
- **Test Metrics** - Pass rate, test counts, trends
- **Coverage Analysis** - Module-by-module breakdown
- **Code Quality Metrics** - TODO/FIXME/deprecation tracking
- **Alerts & Warnings** - Regression detection
- **Recommendations** - Next-day action items

### Example Report Structure

```markdown
# Week 4 Day 1 Report - 2025-11-18

## Executive Summary
| Metric | Current | Day 1 Target | Week 4 Target | Status |
|--------|---------|--------------|---------------|--------|
| Health | 81.0% | 81.0% | 85.0% | ✅ On Track |
| Coverage | 50% | 55% | 65% | ⏳ In Progress |

## Health Score Breakdown
Dimension          Weight   Score   Contribution
─────────────────────────────────────────────
Compilation        30%      100%    30.0%
Testing            25%      50%     12.5%
...

## Alerts & Warnings
- ✅ ALL CLEAR: No critical issues detected

## Recommendations
1. Add 25 CLI tests tomorrow for Day 2 target
2. Monitor coverage trend
3. Verify compilation remains stable
```

---

## Interactive Dashboard

### Features

The `week4_dashboard.sh` provides:

- **Visual Progress Bars** - See coverage/health at a glance
- **Trend Indicators** - ↗ improving, ↘ declining, → stable
- **Color-Coded Status** - Green (on track), Yellow (warning), Red (blocker)
- **Module Breakdown** - Coverage by module with priorities
- **Week 4 Trajectory** - Visual path to 85% target

### Dashboard Sections

1. **Primary Metrics** - Health, coverage, tests with progress bars
2. **Health Score Breakdown** - Weighted dimensions with targets
3. **Week 4 Trajectory** - Progress toward 81% → 85% goal
4. **Coverage by Module** - Gap analysis for each major module

### Example Dashboard Output

```
┌────────────────────────────────────────────────────────────────────┐
│          WEEK 4: METRICS TRACKING & HEALTH SCORE VALIDATION        │
│               Health Score Journey: 81% → 85% (Days 1-5)           │
├────────────────────────────────────────────────────────────────────┤

┃ PRIMARY METRICS - WEEK 4 TARGETS
├────────────────────────────────────────────────────────────────────┤

  Health Score:    81%  [████████████████░░░░░░░░░░]  85% ✓ ↗ +0.0%
  Test Coverage:   50%  [████████░░░░░░░░░░░░░░░░░░]  65% ⏳ → +0%
  Tests Passing:   464  [████████████████░░░░░░░░░░] 560  ✓ → +0
```

---

## Metrics Validation

### What Gets Tracked

**Every Day:**
- Compilation status (errors/warnings)
- Test pass rate (must be 100%)
- Test count (trending toward 560+)
- Coverage estimate (trending toward 65%)
- Health score (trending toward 85%)
- Code quality (TODO/FIXME counts)

**Weekly Aggregates:**
- Total tests added (target: 100+)
- Coverage improvement (target: +15%)
- Health improvement (target: +4%)
- Security fixes (target: 3-5 issues)

### How to Verify

```bash
# Manual verification commands

# 1. Check compilation
cargo check --package ggen-core --lib

# 2. Count tests
cargo test --lib -- --list | grep -c "test "

# 3. Run all tests
cargo test --lib --release

# 4. Count source/test lines
find crates/ggen-core/src -name "*.rs" -exec wc -l {} + | tail -1
find crates/ggen-core -path "*/tests/*" -name "*.rs" -exec wc -l {} + | tail -1

# 5. Calculate coverage estimate
# Coverage ≈ (test_lines / source_lines) × 1.4, capped at 100%
```

---

## Blocker Detection

### Automatic Alerts

The daily tracker automatically detects:

**Critical (Exit Code 1):**
- ❌ Compilation fails
- ❌ Any test failures
- ❌ Coverage regression (< 50% baseline)
- ❌ Health regression (< 81% baseline)

**Warnings (Console):**
- ⚠️ Behind daily target (coverage or health)
- ⚠️ Compilation warnings >10
- ⚠️ Ignored tests increased
- ⚠️ Code quality degradation

### Manual Review Triggers

Consider manual review if:
- Test execution time >5s
- Coverage stagnant for 2+ days
- Health score not improving
- Module coverage gaps widening
- New TODO/FIXME comments added

---

## Files & Structure

### Directory Structure

```
docs/metrics/week4/
  ├── README.md                    # This file
  ├── WEEK4_TRACKING_PLAN.md      # Detailed tracking plan
  ├── daily/                       # Daily reports
  │   ├── day1_2025-11-18.md
  │   ├── day2_2025-11-19.md
  │   ├── day3_2025-11-20.md
  │   ├── day4_2025-11-21.md
  │   └── day5_2025-11-22.md
  └── reports/                     # Final reports
      ├── WEEK4_FINAL_REPORT.md
      └── COVERAGE_BREAKDOWN.md

scripts/week4/
  ├── daily_tracker.sh             # Daily metrics automation
  ├── week4_dashboard.sh           # Interactive dashboard
  └── module_coverage.sh           # Per-module coverage (TBD)
```

### Key Files

**Tracking Plan:**
- `docs/metrics/week4/WEEK4_TRACKING_PLAN.md`
- Comprehensive plan for Week 4
- Day-by-day targets and activities
- Health score calculation methodology

**Daily Tracker:**
- `scripts/week4/daily_tracker.sh`
- Automated daily metrics collection
- Report generation
- Regression detection

**Dashboard:**
- `scripts/week4/week4_dashboard.sh`
- Interactive visual dashboard
- Real-time metrics display
- Trend analysis

---

## Success Criteria

### Daily Success

Each day should achieve:
- [ ] Daily tracker runs successfully
- [ ] No compilation errors
- [ ] 100% test pass rate
- [ ] Metrics on or above daily target
- [ ] Report generated and reviewed

### Week 4 Success

By end of Day 5:
- [ ] Health score ≥85% ✅
- [ ] Coverage ≥65% ✅
- [ ] Tests ≥560 passing ✅
- [ ] 100% pass rate maintained ✅
- [ ] No regressions in any dimension
- [ ] All 5 daily reports complete
- [ ] Dashboard shows green status

---

## Troubleshooting

### Common Issues

**Q: Daily tracker fails with "No reports found"**
A: This is normal on first run. The tracker creates the first report.

**Q: Coverage calculation seems wrong**
A: Verify SOURCE_LINES and TEST_LINES with manual find commands.
   Coverage = (test_lines / source_lines) × 1.4, capped at 100%

**Q: Health score not improving despite new tests**
A: Check test quality - unit tests have less impact than integration tests.
   Ensure tests cover critical code paths (20% critical functionality).

**Q: Dashboard shows old data**
A: Re-run daily_tracker.sh to generate fresh report.

**Q: Tests passing but coverage not increasing**
A: Tests may not be covering new code. Review coverage HTML report.
   Run: cargo tarpaulin -p ggen-core -o Html --timeout 300

---

## Next Steps

After Week 4 completion:

1. **Week 5: Performance & Optimization**
   - Achieve A+ performance (92%+)
   - Optimize critical paths
   - Reduce memory footprint

2. **Week 6: Security Hardening**
   - Achieve A (85%+) security
   - Fix remaining vulnerabilities
   - Security audit

3. **Week 7: Architecture Refinement**
   - Improve architecture to 70%+
   - Reduce circular dependencies
   - Refactor large files

---

## References

- [Health Score Methodology](../HEALTH_SCORE_METHODOLOGY.md)
- [Week 3 Baseline Report](../week3_baseline_report.md)
- [Week 4 Tracking Plan](WEEK4_TRACKING_PLAN.md)
- [Coverage Tracker Script](../../scripts/week4/daily_tracker.sh)
- [Dashboard Script](../../scripts/week4/week4_dashboard.sh)

---

**Document Owner:** Code Quality Analyzer
**Created:** 2025-11-18
**Week:** 4 (Metrics Tracking & Validation)
**Status:** Active
