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**Table of Contents**

- [Packs System Architecture Documentation](#packs-system-architecture-documentation)
  - [Overview](#overview)
  - [Problem Statement](#problem-statement)
  - [Solution](#solution)
  - [Document Index](#document-index)
    - [00_ARCHITECTURE_DIAGRAM.md](#00_architecture_diagrammd)
    - [01_ARCHITECTURE_OVERVIEW.md](#01_architecture_overviewmd)
    - [02_COMMAND_SPECIFICATION.md](#02_command_specificationmd)
    - [03_DATA_MODEL.md](#03_data_modelmd)
    - [04_INTEGRATION_LAYER.md](#04_integration_layermd)
    - [05_USER_WORKFLOWS.md](#05_user_workflowsmd)
    - [06_IMPLEMENTATION_GUIDE.md](#06_implementation_guidemd)
  - [Key Features](#key-features)
  - [Quick Start](#quick-start)
  - [Implementation Phases](#implementation-phases)
  - [Success Metrics](#success-metrics)

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# Packs System Architecture Documentation

**Version:** 3.2.0
**Status:** Production Design
**Target Health Score:** 90%+
**Current Health Score:** 30.75%

## Overview

This directory contains the complete production-ready architecture for the ggen packs system. The packs system enables complete project workflows by providing curated collections of packages, templates, and configurations with deep integration into marketplace, templates, and RDF graph systems.

## Problem Statement

The current packs implementation (health score: 30.75/100) is a stub with:
- ❌ No real marketplace integration
- ❌ No template generation (commented out)
- ❌ No dependency resolution
- ❌ Mock SPARQL queries
- ❌ All 6 user workflows fail

## Solution

A complete redesign that achieves 90%+ health score by:
- ✅ Real marketplace integration for package installation
- ✅ Production template engine for code generation
- ✅ Dependency resolution with circular detection
- ✅ Pack composition support
- ✅ SPARQL metadata queries
- ✅ All 6 user workflows complete end-to-end

## Document Index

### [00_ARCHITECTURE_DIAGRAM.md](./00_ARCHITECTURE_DIAGRAM.md)
ASCII diagrams of system architecture, data flows, and caching strategy.

### [01_ARCHITECTURE_OVERVIEW.md](./01_ARCHITECTURE_OVERVIEW.md)
Comprehensive system architecture with principles, components, failure modes, and success metrics.

### [02_COMMAND_SPECIFICATION.md](./02_COMMAND_SPECIFICATION.md)
Complete command specifications prioritized by 80/20 rule with examples and output.

### [03_DATA_MODEL.md](./03_DATA_MODEL.md)
Complete Rust trait definitions for Pack, PackMetadata, PackTemplate, Dependencies, etc.

### [04_INTEGRATION_LAYER.md](./04_INTEGRATION_LAYER.md)
Adapters bridging domain to infrastructure (Marketplace, Template, Graph).

### [05_USER_WORKFLOWS.md](./05_USER_WORKFLOWS.md)
6 complete end-to-end user workflows with success criteria.

### [06_IMPLEMENTATION_GUIDE.md](./06_IMPLEMENTATION_GUIDE.md)
Step-by-step implementation roadmap (4-6 weeks, 4 phases).

## Key Features

- **Real Integration**: Marketplace, Template Engine, Graph
- **Dependency Resolution**: Topological sort with cycle detection
- **Template Generation**: Variable validation and substitution
- **Pack Composition**: Multi-pack merging with conflict resolution
- **SPARQL Queries**: Semantic metadata operations
- **Error Handling**: 10 failure modes with mitigations
- **Performance**: Caching, parallelization, <30s installs
- **Testing**: 90%+ coverage target

## Quick Start

1. Read [00_ARCHITECTURE_DIAGRAM.md](./00_ARCHITECTURE_DIAGRAM.md) for visual overview
2. Read [01_ARCHITECTURE_OVERVIEW.md](./01_ARCHITECTURE_OVERVIEW.md) for concepts
3. Study [03_DATA_MODEL.md](./03_DATA_MODEL.md) for types
4. Follow [06_IMPLEMENTATION_GUIDE.md](./06_IMPLEMENTATION_GUIDE.md) for implementation

## Implementation Phases

- **Phase 1** (Week 1-2): Foundation (types, marketplace adapter, basic install)
- **Phase 2** (Week 3): Generation (template adapter, variable resolution)
- **Phase 3** (Week 4): Dependencies (resolver, composition)
- **Phase 4** (Week 5): Polish (error handling, performance, tests)

## Success Metrics

- Health Score: 90%+ (from 30.75%)
- Test Coverage: 90%+
- All 6 workflows pass
- Install time: <30s for typical pack
- Generation time: <5s for 12 templates

---

**Status:** Ready for implementation
**Target Release:** ggen v3.3.0 (4-6 weeks)
