# Requirements Archive: v1.3 Research & Decision Tools

**Archived:** 2026-04-08
**Status:** SHIPPED

---

## v1.3 Requirements

Requirements for this milestone. Each maps to roadmap phases 10-13.

### Candidate Ranking

- [x] **RANK-01**: User can drag a candidate card to a new position within the thread's candidate list
- [x] **RANK-02**: The reordered sequence persists after navigating away and returning
- [x] **RANK-03**: Database schema supports pros/cons fields and sort ordering for candidates
- [x] **RANK-04**: Top three candidates display gold, silver, and bronze rank badges
- [x] **RANK-05**: Drag handles and rank badges are absent on resolved threads

### Comparison

- [x] **COMP-01**: User can toggle a "Compare" mode to reveal a tabular view of all candidates
- [x] **COMP-02**: Lightest candidate is highlighted with weight deltas shown for all others
- [x] **COMP-03**: Cheapest candidate is highlighted with price deltas shown for all others
- [x] **COMP-04**: Comparison table scrolls horizontally on narrow viewports with fixed label column

### Setup Impact Preview

- [x] **IMPC-01**: User can select a setup and see weight/cost deltas on each candidate
- [x] **IMPC-02**: Delta reflects replacement when setup has an item in the same category
- [x] **IMPC-03**: Pure addition is clearly labeled when no category match exists
- [x] **IMPC-04**: Candidates without weight data show a "no weight data" indicator

## Traceability

| Requirement | Phase | Status |
|-------------|-------|--------|
| RANK-01 | Phase 11 | Complete |
| RANK-02 | Phase 11 | Complete |
| RANK-03 | Phase 10 | Complete |
| RANK-04 | Phase 11 | Complete |
| RANK-05 | Phase 11 | Complete |
| COMP-01 | Phase 12 | Complete |
| COMP-02 | Phase 12 | Complete |
| COMP-03 | Phase 12 | Complete |
| COMP-04 | Phase 12 | Complete |
| IMPC-01 | Phase 13 | Complete |
| IMPC-02 | Phase 13 | Complete |
| IMPC-03 | Phase 13 | Complete |
| IMPC-04 | Phase 13 | Complete |

**Coverage:**
- v1.3 requirements: 13 total
- Mapped to phases: 13
- Unmapped: 0

---
*Requirements defined: 2026-03-16*
*Archived: 2026-04-08*