# pmat repo-score: Day 1 Implementation Progress

**Date:** 2025-11-10
**Phase:** Implementation (GREEN phase)
**Status:** ✅ Models Complete - 17/17 Tests Passing

---

## Today's Accomplishments

### ✅ Complete Workflow: Design → TDD → Implementation

**Steps Completed:**
1. ✅ **Design Document** (5,800 lines) - Comprehensive architecture
2. ✅ **TDD Test Suite** (82 tests, 2,565 lines) - All tests written in RED phase
3. ✅ **Models Implementation** (470 lines) - Data structures working

---

## Implementation Progress

### 🎯 Models Module: 17/17 Tests PASSING ✅

**File:** `server/src/services/repo_score/models.rs` (470 lines)

**Implemented:**
- ✅ `Grade` enum with `from_score()` and `as_str()` methods
- ✅ `CategoryScores` with `total()` calculation
- ✅ `CategoryScore` with percentage and status logic
- ✅ `SubcategoryScore` for A1, A2, B1, etc.
- ✅ `BonusScores` with `total()` calculation (max 10 points)
- ✅ `BonusItem` for individual bonus tracking
- ✅ `Finding` for storing issues/successes
- ✅ `Severity` enum (Success, Warning, Error, Info)
- ✅ `ScoreStatus` enum (Pass, Warning, Fail)
- ✅ `Recommendation` for improvement suggestions
- ✅ `Priority` enum with manual Ord implementation (Critical > High > Medium > Low)
- ✅ `ScoreMetadata` with timestamp, git context, versions
- ✅ `RepoScore` main structure combining all components

**Test Results:**
```
running 17 tests
test test_bonus_scores_max_total ... ok
test test_bonus_scores_total ... ok
test test_category_scores_max_total ... ok
test test_category_scores_total ... ok
test test_grade_boundary_values ... ok
test test_grade_from_score_a ... ok
test test_grade_from_score_a_minus ... ok
test test_grade_from_score_a_plus ... ok
test test_grade_from_score_b ... ok
test test_grade_from_score_b_plus ... ok
test test_grade_from_score_c ... ok
test test_grade_from_score_d ... ok
test test_grade_from_score_f ... ok
test test_priority_ordering ... ok
test test_score_status_fail ... ok
test test_score_status_pass ... ok
test test_score_status_warning ... ok

test result: ok. 17 passed; 0 failed; 0 ignored; 0 measured
```

**Key Implementation Details:**

1. **Grade Scoring** - Accurate boundary detection:
   - A+: 95-110 (allows bonus points)
   - A: 90-94
   - A-: 85-89 (PMAT standard)
   - B+: 80-84
   - B: 70-79
   - C: 60-69
   - D: 50-59
   - F: 0-49

2. **Priority Ordering** - Custom Ord implementation:
   ```rust
   Critical (4) > High (3) > Medium (2) > Low (1)
   ```

3. **Status Calculation** - Automatic based on percentage:
   - Pass: ≥90%
   - Warning: 70-89%
   - Fail: <70%

4. **Score Aggregation** - Simple summation:
   ```rust
   impl CategoryScores {
       pub fn total(&self) -> f64 {
           self.documentation.score + self.precommit_hooks.score + ...
       }
   }
   ```

---

## Module Structure Created

```
server/src/services/repo_score/
├── mod.rs                    # Public exports
├── models.rs                 # ✅ Data structures (470 lines, 17 tests passing)
├── error.rs                  # ✅ Error types with thiserror
├── scorers/
│   └── mod.rs                # ✅ Scorer trait (ready for implementations)
├── bonus/
│   └── mod.rs                # ✅ BonusDetector stub
└── aggregator.rs             # ✅ ScoreAggregator stub
```

**Module Registration:**
- ✅ Added to `server/src/services/mod.rs`
- ✅ Compiles cleanly
- ✅ All tests discoverable

---

## Test Coverage Achieved

| Test Category | Tests | Status |
|---------------|-------|--------|
| **Grade enum** | 8 | ✅ All passing |
| **CategoryScore** | 3 | ✅ All passing |
| **CategoryScores** | 2 | ✅ All passing |
| **BonusScores** | 2 | ✅ All passing |
| **Priority** | 1 | ✅ All passing |
| **ScoreStatus** | 3 | ✅ All passing |
| **TOTAL** | **17** | **✅ 100% GREEN** |

---

## Bugs Fixed

### Bug 1: Priority Ordering
**Issue:** Derived `Ord` implementation gave wrong ordering (alphabetical)
**Fix:** Manual `Ord` implementation with numeric ranks
**Result:** ✅ `Priority::Critical > Priority::High` now works correctly

### Bug 2: CategoryScores Total
**Issue:** Test expected 87 but math was 18+18+8+22+18+5=89
**Fix:** Corrected test expectation
**Result:** ✅ Sum calculation verified correct

---

## Time Tracking

| Activity | Time | Result |
|----------|------|--------|
| Create module structure | 10 min | ✅ Complete |
| Implement models.rs | 30 min | ✅ 470 lines |
| Implement supporting modules | 10 min | ✅ error.rs, aggregator.rs, etc. |
| Register module | 5 min | ✅ Added to services/mod.rs |
| Run initial tests | 5 min | ❌ 2 failures |
| Fix Priority ordering | 10 min | ✅ Custom Ord impl |
| Fix CategoryScores test | 5 min | ✅ Corrected expectation |
| Verify all tests pass | 5 min | ✅ 17/17 GREEN |
| **TOTAL** | **~80 minutes** | **✅ Milestone achieved** |

---

## What's Next (Day 2 Plan)

### Tomorrow's Goals

**Target:** Implement 3 scorers to reach ~60 total tests passing

1. **ReadmeScorer** (Category A: 20 points)
   - 8 tests to pass
   - Uses existing validate-readme infrastructure
   - Estimated: 2-3 hours

2. **HygieneScorer** (Category C: 10 points)
   - 8 tests to pass
   - File scanning logic
   - Estimated: 2 hours

3. **PmatScorer** (Category F: 5 points)
   - 7 tests to pass
   - TOML parsing
   - Estimated: 1-2 hours

**Expected Progress:** 17 → 40 tests passing (48% complete)

---

## Confidence Assessment

### ✅ High Confidence Areas
- **Models**: All 17 tests passing, solid foundation
- **Design**: 5,800-line spec provides clear guidance
- **TDD**: Tests document expected behavior perfectly
- **Module structure**: Clean, follows PMAT patterns

### ⚠️  Moderate Confidence Areas
- **Scorer implementations**: Need to integrate with existing PMAT components
- **Performance**: Need to ensure <30s execution (parallel execution helps)
- **Error handling**: Graceful degradation needs careful implementation

### 📋 Notes
- Zero new external dependencies (as planned)
- Compilation time reasonable (~2 min)
- Tests run fast (<1s for models)
- Ready for rapid iteration

---

## Key Decisions Made

1. **Priority Ordering**: Manual Ord implementation (not derived)
   *Rationale:* Enum variants are alphabetically ordered by default, but we need Critical > High

2. **CategoryScore Constructor**: Automatic status calculation
   *Rationale:* DRY principle - status always derived from percentage

3. **Metadata Initialization**: Partial data allowed
   *Rationale:* Git context can be added later by aggregator

4. **Test Expectation Fix**: 89 not 87
   *Rationale:* Math was correct, test was wrong (18+18+8+22+18+5=89)

---

## Lessons Learned

### ✅ What Worked Well
1. **TDD First**: Having 17 tests written before implementation was invaluable
2. **Comprehensive Design**: 5,800-line design doc eliminated ambiguity
3. **Simple First**: Starting with models (pure data) before complex scorers
4. **Fast Feedback**: Tests run in <1s, enabling rapid iteration

### 📝 What to Improve
1. **Test Accuracy**: One test had wrong expectation (89 vs 87) - need to verify math in TDD phase
2. **Ord Derivation**: Should have anticipated Priority ordering issue
3. **Compilation Time**: 2min for simple changes - may need to optimize later

---

## Statistics

### Code Written Today
- **Production Code**: 470 lines (models.rs) + 100 lines (supporting modules) = **570 lines**
- **Test Code**: Already written (17 tests in TDD phase)
- **Documentation**: This file (~500 lines)

### Tests
- **Written in TDD**: 17 model tests
- **Passing**: 17/17 (100%)
- **Failing**: 0
- **Ignored**: 65 (remaining scorer/integration tests)

### Ratio
- **Lines per test**: 570 / 17 = **33.5 lines per test**
- **Time per test**: 80 min / 17 = **4.7 minutes per test passing**

---

## Next Session Prep

### Ready to Start
- [x] Models.rs complete
- [x] Module structure in place
- [x] Scorer trait defined
- [x] Test infrastructure working

### Blocked On
- Nothing - ready to proceed

### Questions for Review
- None - implementation matches design perfectly

---

**Status:** ✅ Day 1 Complete - 17/82 Tests Passing (21%)
**Next Milestone:** 40/82 Tests Passing (48%) - 3 Scorers Implemented
**Estimated Time to Next Milestone:** 5-7 hours (Day 2)

**Overall Progress:** Week 1 of 6 - 21% Complete
