# Documentation Index & Feature Matrix

> **Your complete guide to Context Nexus documentation and feature map**

---

## 📚 Documentation Organization

### Start Here (New Users)

| Document | Time | Description |
|----------|------|-------------|
| [Quickstart](./quickstart.md) | 15 min | Hands-on: Build your first agent |
| [Blog: Fundamentals](./blog.md#part-1-fundamentals) | 20 min | Understand the basics (LLM, RAG, embeddings) |
| [Blog: Core Concepts](./blog.md#part-2-core-concepts) | 30 min | Learn vector search, graphs, tokens |

### Guides & References

| Document | Audience | Coverage |
|----------|----------|----------|
| [Blog: Complete Guide](./blog.md) | Everyone | Everything from basics to production |
| [Observability Guide](./OBSERVABILITY.md) | Developers | Tracing, debugging, monitoring |
| [Use Cases & Patterns](./use_cases.md) | Developers | Real-world workflow examples |
| [Architecture Deep Dive](./architecture.md) | Engineers | System design, Python/Rust boundary |
| [Installation Guide](./INSTALL.md) | Everyone | Platform-specific setup instructions |
| [Product Overview](./product_document.md) | Decision Makers | Feature summary, comparisons |

### Code Examples

| Example | Focus | Lines |
|---------|-------|-------|
| [01_simple_qa.py](../examples/01_simple_qa.py) | Basics | ~40 |
| [02_full_workflow.py](../examples/02_full_workflow.py) | Complete lifecycle | ~200 |
| [03_code_analysis.py](../examples/03_code_analysis.py) | Code understanding | ~150 |
| [04_research_agent.py](../examples/04_research_agent.py) | Iterative refinement | ~180 |
| [05_benchmark.py](../examples/05_benchmark.py) | Performance comparison | ~220 |

---

## 🎯 Feature Matrix

### Core Features

| Feature | Status | Docs | Example |
|---------|--------|------|---------|
| **Document Ingestion** | ✅ Stable | [Quickstart §2](./quickstart.md#step-2-add-your-documents) | [01_simple_qa.py](../examples/01_simple_qa.py) |
| **Text Files** (.txt, .md) | ✅ Stable | [README](../README.md#supported-file-formats) | [Quickstart §2](./quickstart.md) |
| **PDF Files** (.pdf) | ✅ Stable | [README](../README.md#supported-file-formats) | [Quickstart §2](./quickstart.md) |
| **HTML Files** (.html, .htm) | ✅ Stable | [README](../README.md#supported-file-formats) | [Quickstart §2](./quickstart.md) |
| **URLs** (https://...) | ✅ Stable | [Blog](./blog.md) | [02_full_workflow.py](../examples/02_full_workflow.py) |
| **Code Files** (.py, .js, .ts, .rs, etc.) | ✅ Stable | [README](../README.md#supported-file-formats) | [03_code_analysis.py](../examples/03_code_analysis.py) |

### Retrieval Features

| Feature | Status | Docs | Performance |
|---------|--------|------|-------------|
| **Vector Search** | ✅ Stable | [Blog §2.1](./blog.md#understanding-embeddings) | 50-150ms |
| **Graph Search** | ✅ Stable | [Blog §2.2](./blog.md#understanding-knowledge-graphs) | 50-100ms |
| **Hybrid Retrieval** (Vector + Graph) | ✅ Stable | [Blog §3.1](./blog.md#hybrid-retrieval-vector--graph-fusion) | 100-200ms |
| **RRF Fusion** | ✅ Stable | [Blog §3.1](./blog.md#the-rrf-algorithm-reciprocal-rank-fusion) | <5ms |
| **Configurable Limits** | ✅ Stable | [Quickstart](./quickstart.md) | - |

### Embedding Support

| Provider | Type | Status | Docs |
|----------|------|--------|------|
| **sentence-transformers** | Local | ✅ Stable | [Blog](./blog.md#which-model-to-use) |
| **all-MiniLM-L6-v2** | Local | ✅ Stable | [Blog](./blog.md) |
| **all-mpnet-base-v2** | Local | ✅ Stable | [Blog](./blog.md) |
| **OpenAI text-embedding-3-small** | API | ✅ Stable | [Blog](./blog.md) |
| **OpenAI text-embedding-3-large** | API | ✅ Stable | [Blog](./blog.md) |

### Vector Database Support

| Backend | Scale | Status | Docs | Setup |
|---------|-------|--------|------|-------|
| **FAISS** (local) | Up to 1M | ✅ Stable | [Architecture](./architecture.md) | Built-in |
| **Qdrant** (remote) | Unlimited | ✅ Stable | [Architecture](./architecture.md) | External service |

### Graph Database Support

| Backend | Scale | Status | Docs | Setup |
|---------|-------|--------|------|-------|
| **NetworkX** (in-memory) | Up to 1M | ✅ Stable | [Architecture](./architecture.md) | Built-in |
| **Neo4j** (remote) | Unlimited | ✅ Stable | [Architecture](./architecture.md) | External service |

### Agent & Generation Features

| Feature | Status | Docs | Example |
|---------|--------|------|---------|
| **Simple Q&A Agent** | ✅ Stable | [Quickstart §4](./quickstart.md#step-4-create-your-agent) | [01_simple_qa.py](../examples/01_simple_qa.py) |
| **Token Budget Management** | ✅ Stable | [Blog §2.3](./blog.md#token-budgets-explained) | [02_full_workflow.py](../examples/02_full_workflow.py) |
| **OpenAI Integration** | ✅ Stable | [Quickstart §3](./quickstart.md#step-3-set-your-api-key) | [02_full_workflow.py](../examples/02_full_workflow.py) |
| **Source Attribution** | ✅ Stable | [Quickstart §4](./quickstart.md#step-4-create-your-agent) | [01_simple_qa.py](../examples/01_simple_qa.py) |
| **Confidence Scores** | ✅ Stable | [Quickstart §4](./quickstart.md#step-4-create-your-agent) | [04_research_agent.py](../examples/04_research_agent.py) |
| **Structured Output** | ✅ Stable | [Quickstart §6](./quickstart.md#next-steps) | - |
| **Multi-Turn Conversation** | 🔧 In Progress | [Use Cases](./use_cases.md) | - |

### Observability Features

| Feature | Status | Docs | Example |
|---------|--------|------|---------|
| **Query Tracing** | ✅ Stable | [Observability Guide](./OBSERVABILITY.md) | [Blog §3.2](./blog.md#observability--tracing) |
| **Latency Tracking** | ✅ Stable | [Observability](./OBSERVABILITY.md#trace-data-reference) | [05_benchmark.py](../examples/05_benchmark.py) |
| **Token Counting** | ✅ Stable | [Blog §2.3](./blog.md#token-budgets-explained) | [05_benchmark.py](../examples/05_benchmark.py) |
| **Performance Metrics** | ✅ Stable | [Observability](./OBSERVABILITY.md#performance-optimization) | [05_benchmark.py](../examples/05_benchmark.py) |
| **Step Breakdown** | ✅ Stable | [Observability](./OBSERVABILITY.md#trace-steps-explained) | [Quickstart §6](./quickstart.md#step-6-add-observability-optional) |
| **Debugging Tools** | ✅ Stable | [Observability](./OBSERVABILITY.md#debugging-with-traces) | - |
| **Production Monitoring** | ✅ Stable | [Observability](./OBSERVABILITY.md#monitoring-in-production) | - |

### Performance Features

| Feature | Status | Docs | Speedup |
|---------|--------|------|---------|
| **Rust Acceleration** | ✅ Stable | [Blog §1.1](./blog.md#decision-1-python--rust) | 10-20x |
| **SIMD Optimization** | ✅ Stable | [Architecture](./architecture.md) | 5-10x |
| **Token Counting** | ✅ Stable | [Blog §2.3](./blog.md#token-budgets-explained) | 10x |
| **Context Compression** | ✅ Stable | [Blog](./blog.md) | 2-3x |
| **Async/Await Support** | ✅ Stable | [Quickstart](./quickstart.md) | - |

### Platform Support

| Platform | Arch | Status | Docs |
|----------|------|--------|------|
| **macOS** | ARM64 (M1/M2) | ✅ Stable | [Installation](./INSTALL.md) |
| **macOS** | x86_64 (Intel) | ✅ Stable | [Installation](./INSTALL.md) |
| **Linux** | x86_64 | ✅ Stable | [Installation](./INSTALL.md) |
| **Linux** | ARM64 | ✅ Stable | [Installation](./INSTALL.md) |
| **Windows** | x86_64 | ✅ Stable | [Installation](./INSTALL.md) |

---

## 🗺️ Feature Discovery Guide

### "I want to..."

#### Build a Simple Q&A Agent
1. Start: [Quickstart](./quickstart.md) (15 min)
2. Understand: [Blog: Fundamentals](./blog.md#part-1-fundamentals) (20 min)
3. Code: [01_simple_qa.py](../examples/01_simple_qa.py)
4. Deploy: [Quickstart §7](./quickstart.md#step-7-make-it-a-web-app-optional)

#### Understand How It Works
1. Start: [Blog: Core Concepts](./blog.md#part-2-core-concepts) (30 min)
2. Deep dive: [Architecture](./architecture.md)
3. Optimize: [Blog §3](./blog.md#part-3-advanced-topics)
4. Details: [Observability Guide](./OBSERVABILITY.md)

#### Make It Production-Ready
1. Review: [Blog §5](./blog.md#part-5-troubleshooting--operations)
2. Monitor: [Observability: Production](./OBSERVABILITY.md#monitoring-in-production)
3. Scale: [Blog: Scaling Guide](./blog.md#scaling-guide)
4. Examples: [02_full_workflow.py](../examples/02_full_workflow.py)

#### Optimize Performance
1. Benchmark: [Examples: 05_benchmark.py](../examples/05_benchmark.py)
2. Understand: [Blog §3: Performance](./blog.md#performance-optimization)
3. Monitor: [Observability: Optimization](./OBSERVABILITY.md#performance-optimization)
4. Configure: [Architecture: Tuning](./architecture.md)

#### Analyze Code
1. Learn: [Quickstart](./quickstart.md)
2. Example: [03_code_analysis.py](../examples/03_code_analysis.py)
3. Deep dive: [Blog](./blog.md)

#### Do Research & Synthesis
1. Example: [04_research_agent.py](../examples/04_research_agent.py)
2. Patterns: [Use Cases: Iterative](./use_cases.md#pattern-3-iterative-refinement)
3. Architecture: [Blog §4](./blog.md#part-4-architecture--design)

#### Debug Issues
1. Observability: [Observability: Debugging](./OBSERVABILITY.md#debugging-with-traces)
2. Troubleshooting: [Blog §5: Issues](./blog.md#common-issues--solutions)
3. Examples: [Examples](../examples/)

#### Understand Trade-offs
1. Overview: [Blog: Decisions](./blog.md#why-we-built-it-this-way)
2. Comparison: [Product Document](./product_document.md)
3. Details: [Architecture](./architecture.md)

---

## 📊 Coverage by Topic

### LLM & Generative AI
- [Blog: Fundamentals](./blog.md#what-is-an-llm-if-youre-new-to-ai) - ✅
- [Blog: RAG](./blog.md#what-is-rag) - ✅
- [Quickstart](./quickstart.md) - ✅

### Embeddings
- [Blog: Understanding Embeddings](./blog.md#understanding-embeddings) - ✅
- [Product Doc](./product_document.md) - ✅
- [Architecture](./architecture.md) - ✅

### Knowledge Graphs
- [Blog: Understanding Knowledge Graphs](./blog.md#understanding-knowledge-graphs) - ✅
- [Architecture](./architecture.md) - ✅
- [Use Cases](./use_cases.md) - ✅

### Token Management
- [Blog: Token Budgets](./blog.md#token-budgets-explained) - ✅
- [Observability](./OBSERVABILITY.md) - ✅
- [Architecture](./architecture.md) - ✅

### Chunking
- [Blog: Chunking Strategies](./blog.md#chunking-strategies) - ✅
- [Quickstart](./quickstart.md) - ✅
- [Architecture](./architecture.md) - ✅

### Hybrid Retrieval
- [Blog: Hybrid Retrieval](./blog.md#hybrid-retrieval-vector--graph-fusion) - ✅
- [Use Cases](./use_cases.md) - ✅
- [Examples: 02_full_workflow.py](../examples/02_full_workflow.py) - ✅

### Performance & Optimization
- [Blog: Performance](./blog.md#performance-optimization) - ✅
- [Observability: Performance](./OBSERVABILITY.md#performance-optimization) - ✅
- [Examples: 05_benchmark.py](../examples/05_benchmark.py) - ✅
- [Architecture](./architecture.md) - ✅

### Production Deployment
- [Blog: Production Patterns](./blog.md#production-patterns) - ✅
- [Observability: Monitoring](./OBSERVABILITY.md#monitoring-in-production) - ✅
- [Blog: Scaling Guide](./blog.md#scaling-guide) - ✅
- [Use Cases: Complete](./use_cases.md) - ✅

### Troubleshooting
- [Blog: Issues & Solutions](./blog.md#common-issues--solutions) - ✅
- [Observability: Debugging](./OBSERVABILITY.md#debugging-with-traces) - ✅
- [Quickstart: Troubleshooting](./quickstart.md#troubleshooting) - ✅

### Architecture & Design
- [Architecture Document](./architecture.md) - ✅
- [Blog: Architecture](./blog.md#part-4-architecture--design) - ✅
- [Product Document](./product_document.md) - ✅

---

## 🚀 Learning Paths

### Path 1: Complete Beginner (No ML/AI Background)
```
Time: 2-3 hours total

1. Blog: Fundamentals          (20 min)
2. Blog: Core Concepts         (30 min)
3. Quickstart                  (15 min)
4. Run Example 01              (10 min)
5. Blog: Advanced Topics       (30 min)
6. Run Example 02              (15 min)
7. Observability Guide         (30 min)

Next: Try your own documents!
```

### Path 2: Python Developer (Want to Ship Fast)
```
Time: 30-45 minutes

1. Quickstart                  (15 min)
2. Run Examples 01-02          (20 min)
3. Check Use Cases             (10 min)

Next: Add to your project!
```

### Path 3: ML Engineer (Want to Understand Design)
```
Time: 3-4 hours

1. Blog (all parts)            (2 hours)
2. Architecture Document       (45 min)
3. Observability Guide         (30 min)
4. Run Examples + Benchmark    (30 min)

Next: Contribute to project!
```

### Path 4: Decision Maker (Need to Evaluate)
```
Time: 30 minutes

1. Product Document            (15 min)
2. Quickstart                  (15 min)

Next: Run Example 01 yourself!
```

---

## ❓ FAQ: Finding What You Need

**Q: I'm completely new to AI. Where do I start?**
A: [Blog: Fundamentals](./blog.md#part-1-fundamentals)

**Q: I want to see code immediately.**
A: [Quickstart](./quickstart.md) or [01_simple_qa.py](../examples/01_simple_qa.py)

**Q: My queries are slow. How do I optimize?**
A: [Observability: Performance](./OBSERVABILITY.md#performance-optimization)

**Q: I need to scale to millions of documents.**
A: [Blog: Scaling](./blog.md#scaling-guide) + [Architecture](./architecture.md)

**Q: How do I debug wrong answers?**
A: [Observability: Debugging](./OBSERVABILITY.md#debugging-with-traces)

**Q: What about cost estimation?**
A: [Observability: Cost Estimation](./OBSERVABILITY.md#pattern-3-cost-estimation)

**Q: Can I use this without API keys?**
A: Yes! [Quickstart: Free Tier](./quickstart.md#free-tier-limits)

**Q: How is this different from LangChain?**
A: [Product Document: Comparison](./product_document.md)

---

## 📝 Documentation Status

| Document | Last Updated | Status | Completeness |
|----------|--------------|--------|--------------|
| Quickstart | 2026-01-16 | ✅ Complete | 100% |
| Blog | 2026-01-16 | ✅ Complete | 100% |
| Observability | 2026-01-16 | ✅ Complete | 100% |
| Architecture | 2026-01-15 | ✅ Complete | 95% |
| Use Cases | 2026-01-15 | ✅ Complete | 90% |
| Product Document | 2026-01-15 | ✅ Complete | 95% |
| Installation | 2026-01-15 | ✅ Complete | 100% |
| Index (this doc) | 2026-01-16 | ✅ Complete | 100% |

---

## 🎓 Suggested Reading Order

1. **First Time?** → Quickstart
2. **Curious?** → Blog (Fundamentals)
3. **Ready to Build?** → Blog (Core Concepts) + Example 01
4. **Going Deeper?** → Blog (Advanced) + Examples 02-04
5. **Need Production?** → Blog (Production Patterns) + Observability
6. **Want to Understand Everything?** → Architecture Document

**Happy learning! 🚀**
