---
milestone: v0.5.3
audited: 2026-03-14
status: passed
scores:
  requirements: 24/24
  phases: 4/4
  integration: 24/24
  flows: 5/5
gaps:
  requirements: []
  integration: []
  flows: []
tech_debt:
  - phase: 31-fan-trap-detection
    items:
      - "Approved deviation: FAN-02/FAN-03 changed from warnings to blocking errors per user decision (documented in 31-CONTEXT.md)"
  - phase: 32-role-playing-using
    items:
      - "Proptest strategy fix needed: arb_view_name() can generate 'as_' as relationship name (pre-existing from Phase 31, mitigated by find_keyword_ci fix in 7e9f01e)"
nyquist:
  compliant_phases: []
  partial_phases: [29, 30, 31, 32]
  missing_phases: []
  overall: partial
---

# v0.5.3 Milestone Audit — Advanced Semantic Features

**Milestone Goal:** Add advanced semantic modeling capabilities — FACTS clause, derived metrics, hierarchies, fan trap detection, role-playing dimensions, and multiple join paths (USING RELATIONSHIPS).

**Audit Date:** 2026-03-14
**Status:** PASSED
**Requirements:** 24/24 satisfied
**Phases:** 4/4 passed

---

## Phase Verification Summary

| Phase | Name | Status | Score | Anti-Patterns |
|-------|------|--------|-------|---------------|
| 29 | FACTS Clause & Hierarchies | PASSED | 12/12 | None |
| 30 | Derived Metrics | PASSED | 9/9 | None |
| 31 | Fan Trap Detection | PASSED | 11/11 | None |
| 32 | Role-Playing & USING | PASSED | 11/11 | None (proptest regex fixed in 7e9f01e) |

---

## Requirements Coverage (3-Source Cross-Reference)

### Source 1: Phase VERIFICATION.md Status
### Source 2: SUMMARY.md `requirements-completed` Frontmatter
### Source 3: REQUIREMENTS.md Traceability Table `[x]` Status

| REQ-ID | Description | Phase | VERIFICATION | SUMMARY | REQUIREMENTS | Final |
|--------|-------------|-------|--------------|---------|--------------|-------|
| FACT-01 | Named row-level expressions in FACTS clause | 29 | SATISFIED | 29-01 | [x] | satisfied |
| FACT-02 | Metric expressions reference facts, inlines with parenthesization | 29 | SATISFIED | 29-02 | [x] | satisfied |
| FACT-03 | Facts reference other facts, topological resolution | 29 | SATISFIED | 29-01 | [x] | satisfied |
| FACT-04 | Define-time validation rejects fact cycles/unknown refs | 29 | SATISFIED | 29-01 | [x] | satisfied |
| FACT-05 | DESCRIBE shows facts | 29 | SATISFIED | 29-02 | [x] | satisfied |
| HIER-01 | Drill-down paths in HIERARCHIES clause | 29 | SATISFIED | 29-01 | [x] | satisfied |
| HIER-02 | Define-time validation rejects unknown dimension refs | 29 | SATISFIED | 29-01 | [x] | satisfied |
| HIER-03 | DESCRIBE shows hierarchies | 29 | SATISFIED | 29-02 | [x] | satisfied |
| DRV-01 | Derived metrics without table prefix | 30 | SATISFIED | 30-01 | [x] | satisfied |
| DRV-02 | Derived metrics inline referenced metrics' aggregates | 30 | SATISFIED | 30-02 | [x] | satisfied |
| DRV-03 | Stacked derived metrics resolve in topological order | 30 | SATISFIED | 30-02 | [x] | satisfied |
| DRV-04 | Define-time validation rejects derived metric cycles/unknown refs | 30 | SATISFIED | 30-01 | [x] | satisfied |
| DRV-05 | Derived metrics cannot contain aggregation functions | 30 | SATISFIED | 30-01 | [x] | satisfied |
| FAN-01 | Relationships optionally declare cardinality | 31 | SATISFIED | 31-01 | [x] | satisfied |
| FAN-02 | Fan trap blocking error on one-to-many aggregation | 31 | SATISFIED | 31-02 | [x] | satisfied (deviation: blocking, not warning) |
| FAN-03 | Fan trap errors block query execution | 31 | SATISFIED | 31-02 | [x] | satisfied (deviation: inverted semantics) |
| JOIN-01 | Multiple named relationships between same table pair | 32 | SATISFIED | 32-01 | [x] | satisfied |
| JOIN-02 | Metrics declare USING to select join path | 32 | SATISFIED | 32-01 | [x] | satisfied |
| JOIN-03 | Expansion generates scoped aliases for USING | 32 | SATISFIED | 32-02 | [x] | satisfied |
| JOIN-04 | Define-time validation rejects unknown USING refs | 32 | SATISFIED | 32-01 | [x] | satisfied |
| JOIN-05 | Ambiguous multi-path table without USING produces error | 32 | SATISFIED | 32-02 | [x] | satisfied |
| ROLE-01 | Same table via different relationships → distinct aliases | 32 | SATISFIED | 32-02 | [x] | satisfied |
| ROLE-02 | Dimensions resolve to correct alias via USING context | 32 | SATISFIED | 32-02 | [x] | satisfied |
| ROLE-03 | Classic role-playing pattern works end-to-end | 32 | SATISFIED | 32-02 | [x] | satisfied |

**Orphaned requirements:** None. All 24 REQ-IDs in REQUIREMENTS.md traceability table are present in at least one phase VERIFICATION.md.

---

## Integration Check

**Connected exports:** 18 cross-phase exports properly wired
**Orphaned exports:** 0
**Missing connections:** 0

### Cross-Phase Wiring

| From | To | Via | Status |
|------|----|-----|--------|
| body_parser (parse) | parse.rs (rewrite) | KeywordBody fields → SemanticViewDefinition | WIRED |
| parse.rs (rewrite) | define.rs (persist) | JSON catalog storage | WIRED |
| define.rs (persist) | graph.rs (validate) | validate_facts → validate_hierarchies → validate_derived_metrics → validate_using_relationships | WIRED |
| graph.rs (validate) | expand.rs (expand) | RelationshipGraph, cardinality map | WIRED |
| expand.rs facts (P29) | expand.rs derived (P30) | inline_facts called within inline_derived_metrics | WIRED |
| expand.rs derived (P30) | expand.rs fan trap (P31) | collect_derived_metric_source_tables reused by check_fan_traps | WIRED |
| expand.rs fan trap (P31) | expand.rs USING (P32) | check_fan_traps runs before USING-aware join resolution | WIRED |
| expand.rs USING (P32) | expand.rs join gen | synthesize_on_clause_scoped for aliases containing `__` | WIRED |

### E2E Flow Traces

| Flow | Description | Status |
|------|-------------|--------|
| 1 | FACT inlining: CREATE with FACTS → query → arithmetic correctness | COMPLETE |
| 2 | Derived metrics: stacked chain → query → expansion | COMPLETE |
| 3 | Fan trap detection: ONE TO MANY → blocked query | COMPLETE |
| 4 | Role-playing: USING clause → scoped aliases → correct city resolution | COMPLETE |
| 5 | Ambiguous path: role-playing table without USING → AmbiguousPath error | COMPLETE |

---

## Nyquist Compliance

| Phase | VALIDATION.md | Compliant | Wave 0 | Action |
|-------|---------------|-----------|--------|--------|
| 29 | exists | false | false | `/gsd:validate-phase 29` |
| 30 | exists | false | false | `/gsd:validate-phase 30` |
| 31 | exists | false | false | `/gsd:validate-phase 31` |
| 32 | exists | false | false | `/gsd:validate-phase 32` |

**Overall:** Partial — all 4 phases have VALIDATION.md stubs but none are compliant.

---

## Tech Debt

### Phase 31: Fan Trap Detection
- **Approved deviation:** FAN-02 and FAN-03 text in REQUIREMENTS.md describes "warnings" that don't block. User explicitly changed this to blocking errors during planning (documented in `31-CONTEXT.md`). Implementation correctly reflects user's decision.

### Phase 32: Role-Playing & USING
- **Proptest strategy:** `arb_view_name()` can generate names like `as_` that confuse keyword detection. Pre-existing from Phase 31, mitigated by `find_keyword_ci` fix (commit 7e9f01e) treating underscore as identifier character. All proptests now pass.

**Total:** 2 items across 2 phases. Neither is a blocker.

---

## Quality Gate

All phases passed `just test-all`:

| Phase | cargo test | just test-sql | just test-ducklake-ci |
|-------|-----------|---------------|----------------------|
| 29 | 353 passed | 8/8 files | 6/6 passed |
| 30 | 390 passed | 9/9 files | 6/6 passed |
| 31 | 411 passed | 10/10 files | 6/6 passed |
| 32 | all passed | 11/11 files | 6/6 passed |

---

_Audited: 2026-03-14_
_Auditor: Claude (gsd-audit-milestone)_
