# Project State: Itinerary Editor

## Project Reference

**Core Value:** Drag-and-drop that operates on semantic positions (day + sortOrder), not row indices - so user intent is preserved across data reloads.

**Current Focus:** Beginning Phase 1 - Semantic Position Model

## Current Position

**Phase:** 1 - Semantic Position Model
**Plan:** Not yet created
**Status:** Awaiting plan creation

```
Progress: [----------] 0%
Phase 1:  [----------] Not Started
Phase 2:  [----------] Not Started
Phase 3:  [----------] Not Started
Phase 4:  [----------] Not Started
```

## Performance Metrics

| Metric | Value |
|--------|-------|
| Total Requirements | 23 |
| Completed | 0 |
| Current Phase | 1 |
| Plans Executed | 0 |

## Accumulated Context

### Key Decisions

| Decision | Rationale | Phase |
|----------|-----------|-------|
| UITableView over SwiftUI List | SwiftUI drag-drop lacks insertion line precision | Pre-planning |
| (day, sortOrder) position model | Row indices break on reload; semantic position is stable | Pre-planning |
| Insertion lines (not zones) | User wants precise feedback on exact drop location | Pre-planning |
| Invalid drops rejected (snap back) | Cleaner than auto-clamping; user knows what happened | Pre-planning |

### Learned

- Previous attempts failed due to row-based thinking instead of semantic positioning
- Travel was incorrectly treated as structural ("travelBefore") instead of positional
- Hard-coded flatten order ignoring sortOrder caused reload issues

### TODOs

None yet - awaiting Phase 1 planning.

### Blockers

None currently.

## Session Continuity

**Last Session:** Project initialized, roadmap created
**Next Action:** Create plan for Phase 1

### Context for Next Session

Starting fresh. Phase 1 establishes the semantic position model that everything else depends on. Requirements DATA-01 through DATA-05 define the model structure, PERS-01 through PERS-03 define persistence behavior. The key insight from research: row indices are lies, semantic positions are truth.

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*State initialized: 2026-01-18*
*Last updated: 2026-01-18*