# Visualization V2.0 - Documentation Index

**Complete Design Package for List-Based Hierarchical Navigation**

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## 📚 Document Overview

This design package contains everything needed to implement the new visualization architecture. Documents are organized for different audiences:

| Document | Audience | Purpose | Pages |
|----------|----------|---------|-------|
| **INDEX** (this file) | Everyone | Navigation hub | 2 |
| **SUMMARY** | Executives, PMs | High-level overview | 4 |
| **ARCHITECTURE** | Engineers | Complete design spec | 45 |
| **DIAGRAMS** | All | Visual reference | 20 |
| **CHECKLIST** | Engineers, QA | Implementation tracking | 12 |

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## 📖 Reading Guide

### For Executives / Product Managers
**Goal**: Understand what's changing and why

1. **Start here**: [VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md](./VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md)
   - Read: Sections 1-3 (What's changing, key decisions, architecture)
   - Time: 10 minutes

2. **Then review**: [VISUALIZATION_V2_DIAGRAMS.md](./VISUALIZATION_V2_DIAGRAMS.md)
   - Read: User Flow Diagrams (Section 1)
   - Time: 5 minutes

3. **Finally check**: [VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md](./VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md)
   - Read: Implementation phases and timelines (Section 4-5)
   - Time: 5 minutes

**Total Time**: ~20 minutes

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### For Engineers (Implementers)
**Goal**: Understand how to build this

1. **Start here**: [VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md](./VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md)
   - Read: Entire document for context
   - Time: 15 minutes

2. **Deep dive**: [VISUALIZATION_ARCHITECTURE_V2.md](./VISUALIZATION_ARCHITECTURE_V2.md)
   - Read: All sections (skip testing strategy on first read)
   - Focus: Sections 4-7 (Data Model, Layout Engine, State Management, Interaction Handlers)
   - Time: 90 minutes

3. **Visual reference**: [VISUALIZATION_V2_DIAGRAMS.md](./VISUALIZATION_V2_DIAGRAMS.md)
   - Keep open as reference while coding
   - Refer to: Layout examples, state machine, data structures
   - Time: Ongoing reference

4. **Track progress**: [VISUALIZATION_V2_CHECKLIST.md](./VISUALIZATION_V2_CHECKLIST.md)
   - Use during implementation
   - Check off items as completed
   - Time: Ongoing

**Total Time**: ~2 hours initial read, then ongoing reference

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### For QA / Testers
**Goal**: Understand what to test

1. **Start here**: [VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md](./VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md)
   - Read: What's changing, key metrics
   - Time: 10 minutes

2. **Review flows**: [VISUALIZATION_V2_DIAGRAMS.md](./VISUALIZATION_V2_DIAGRAMS.md)
   - Read: User Flow Diagrams (Section 1)
   - Read: Interaction Patterns (Section 5)
   - Time: 15 minutes

3. **Test plan**: [VISUALIZATION_ARCHITECTURE_V2.md](./VISUALIZATION_ARCHITECTURE_V2.md)
   - Read: Section 11 (Testing Strategy)
   - Time: 20 minutes

4. **Checklist**: [VISUALIZATION_V2_CHECKLIST.md](./VISUALIZATION_V2_CHECKLIST.md)
   - Read: Phase 6 (Testing & Polish)
   - Time: 10 minutes

**Total Time**: ~55 minutes

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## 📄 Document Descriptions

### 1. VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md
**Quick Reference Guide**

- **What's in it**:
  - Current vs. new state comparison
  - Key design decisions with rationale
  - Architecture at a glance
  - 6-week implementation plan
  - Critical algorithms (pseudocode)
  - High-risk areas and mitigation
  - Success criteria

- **Use this for**:
  - Executive briefings
  - Stakeholder presentations
  - Quick reference during design reviews
  - Onboarding new team members

- **Length**: 4 pages
- **Time to read**: 15 minutes

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### 2. VISUALIZATION_ARCHITECTURE_V2.md
**Complete Design Specification**

- **What's in it**:
  - Executive summary
  - Current state analysis
  - Requirements specification (functional + non-functional)
  - Data model design (with TypeScript interfaces)
  - Layout engine architecture (3 algorithms with pseudocode)
  - State management system (state machine, transitions)
  - Interaction handlers (click, keyboard, breadcrumb)
  - Rendering strategy (D3.js integration)
  - 6-phase implementation plan (detailed tasks, LOC estimates)
  - Risk analysis (3 high-risk areas with mitigation)
  - Testing strategy (unit, integration, UAT, performance)
  - Appendices (ASCII diagrams, file modification checklist)

- **Use this for**:
  - Implementation reference
  - Architecture reviews
  - Design decisions documentation
  - Code reviews
  - Debugging complex issues

- **Length**: 45 pages
- **Time to read**: 2 hours (deep read), 30 minutes (skim)

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### 3. VISUALIZATION_V2_DIAGRAMS.md
**Visual Reference**

- **What's in it**:
  - User flow diagrams (ASCII art)
    - Navigate from root to function
    - Sibling directory switch
  - Layout examples
    - Small project (root list)
    - Directory expanded (horizontal fan)
    - File expanded (AST chunks)
  - State machine diagram
  - Data structures (with examples)
  - Interaction patterns (step-by-step flows)
  - Implementation cheat sheet (quick reference table)

- **Use this for**:
  - Understanding visual layout
  - Debugging layout issues
  - Explaining design to stakeholders
  - Quick reference during coding

- **Length**: 20 pages (mostly diagrams)
- **Time to read**: 30 minutes (first read), 5 minutes (reference)

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### 4. VISUALIZATION_V2_CHECKLIST.md
**Implementation Tracking**

- **What's in it**:
  - 6 phases broken into subtasks
  - Checkboxes for each task (total: ~150 tasks)
  - File references for each task
  - Acceptance criteria for each phase
  - Performance benchmarks
  - UAT checklist
  - Sign-off section
  - Notes & issues section

- **Use this for**:
  - Daily development tracking
  - Sprint planning
  - Progress reporting
  - Identifying blockers
  - Final validation before release

- **Length**: 12 pages
- **Time to use**: Ongoing throughout development

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## 🗂️ File Locations

```
/docs/development/
├── VISUALIZATION_V2_INDEX.md              ← You are here
├── VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md    ← Executive summary
├── VISUALIZATION_ARCHITECTURE_V2.md            ← Complete spec
├── VISUALIZATION_V2_DIAGRAMS.md                ← Visual reference
└── VISUALIZATION_V2_CHECKLIST.md               ← Implementation tracking
```

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## 🎯 Quick Reference by Task

### "I need to understand the high-level changes"
→ Read: [SUMMARY](./VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md) (15 min)

### "I need to implement the list layout algorithm"
→ Read: [ARCHITECTURE](./VISUALIZATION_ARCHITECTURE_V2.md) Section 5.1 + [DIAGRAMS](./VISUALIZATION_V2_DIAGRAMS.md) Section 2.1

### "I need to understand state management"
→ Read: [ARCHITECTURE](./VISUALIZATION_ARCHITECTURE_V2.md) Section 6 + [DIAGRAMS](./VISUALIZATION_V2_DIAGRAMS.md) Section 3

### "I need to implement fan layout"
→ Read: [ARCHITECTURE](./VISUALIZATION_ARCHITECTURE_V2.md) Section 5.2 + [DIAGRAMS](./VISUALIZATION_V2_DIAGRAMS.md) Section 2.2

### "I need to implement edge filtering"
→ Read: [ARCHITECTURE](./VISUALIZATION_ARCHITECTURE_V2.md) Section 7 + [DIAGRAMS](./VISUALIZATION_V2_DIAGRAMS.md) Section 2.3

### "I need to track implementation progress"
→ Use: [CHECKLIST](./VISUALIZATION_V2_CHECKLIST.md)

### "I need test cases"
→ Read: [ARCHITECTURE](./VISUALIZATION_ARCHITECTURE_V2.md) Section 11 + [CHECKLIST](./VISUALIZATION_V2_CHECKLIST.md) Phase 6

### "I need to explain this to stakeholders"
→ Use: [SUMMARY](./VISUALIZATION_ARCHITECTURE_V2_SUMMARY.md) + [DIAGRAMS](./VISUALIZATION_V2_DIAGRAMS.md) Section 1

### "I'm stuck on a specific implementation detail"
→ Search: [ARCHITECTURE](./VISUALIZATION_ARCHITECTURE_V2.md) (use Ctrl+F)

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## 📊 Document Statistics

| Metric | Value |
|--------|-------|
| Total pages | ~83 pages |
| Total words | ~35,000 words |
| Code examples | 25+ examples |
| Algorithms | 8 detailed algorithms |
| Diagrams | 15+ ASCII diagrams |
| Test cases | 50+ test scenarios |
| Tasks | ~150 implementation tasks |

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## 🔄 Version History

| Version | Date | Author | Changes |
|---------|------|--------|---------|
| 1.0 | 2025-12-06 | Claude Engineer | Initial design package |

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## ✅ Design Review Checklist

Before starting implementation, verify:

- [ ] All stakeholders have reviewed SUMMARY document
- [ ] Engineers have read ARCHITECTURE sections 4-7
- [ ] QA has read Testing Strategy (ARCHITECTURE section 11)
- [ ] Product has approved requirements (ARCHITECTURE section 3)
- [ ] Tech lead has approved architecture (ARCHITECTURE sections 5-8)
- [ ] Risks have been discussed and mitigations agreed (ARCHITECTURE section 10)
- [ ] Timeline is approved (SUMMARY section 4)
- [ ] Resources are allocated (6 weeks, 1 engineer)

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## 📞 Questions?

If you have questions about this design:

1. **Check the docs first**: Use search (Ctrl+F) to find relevant sections
2. **Review diagrams**: [DIAGRAMS](./VISUALIZATION_V2_DIAGRAMS.md) may clarify
3. **Check examples**: [ARCHITECTURE](./VISUALIZATION_ARCHITECTURE_V2.md) has 25+ code examples
4. **Still stuck?**: Document your question and raise it in design review

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## 🚀 Ready to Start?

**Next Steps**:
1. Complete design review checklist (above)
2. Schedule kickoff meeting
3. Set up development environment
4. Begin Phase 1: [CHECKLIST](./VISUALIZATION_V2_CHECKLIST.md) → Phase 1

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**Good luck with the implementation!** 🎉

This design has been carefully crafted to minimize risk while delivering a superior user experience. Follow the phased approach, track progress with the checklist, and refer to these documents throughout development.

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**Document Version**: 1.0
**Last Updated**: 2025-12-06
**Status**: Design Review
