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Table of Contents

Ggen Marketplace C4 Diagrams

This directory contains comprehensive C4 architecture diagrams for the Ggen Marketplace system, documenting the full end-to-end lifecycles and system interactions.

Diagram Overview

1. System Context (C4_marketplace_context.puml)

Purpose: High-level view of the marketplace system and its external interactions Key Elements:

  • Developer and Publisher personas
  • Ggen CLI system
  • Marketplace registry
  • GitHub hosting platform

2. Container Diagram (C4_marketplace_container.puml)

Purpose: Shows the major containers and their responsibilities Key Elements:

  • CLI and Core Engine containers
  • Local Cache and Lockfile
  • Registry Index and CI/CD Pipeline
  • Gpack Repositories

3. Consumer Lifecycle (C4_marketplace_consumer_lifecycle.puml)

Purpose: Detailed workflow for developers using gpacks Key Elements:

  • Search, Add, List, Generate, Update, Remove commands
  • Registry Client, Cache Manager, Lockfile Manager
  • Template Resolver and Generation Pipeline
  • External systems (Registry, Repos, Cache, Lockfile)

4. Publisher Lifecycle (C4_marketplace_publisher_lifecycle.puml)

Purpose: Detailed workflow for publishers creating gpacks Key Elements:

  • Pack Init, Lint, Test, Publish commands
  • Validation System (Schema, Semver, Compatibility, Path, License, Size, Security)
  • Registry System (Repository, Index Generator, Pages)
  • Gpack Repository structure

5. Data Flow (C4_marketplace_data_flow.puml)

Purpose: Shows how data flows through the system Key Elements:

  • Search, Add, Generate, Publish, Update data flows
  • Local System (CLI, Cache, Lockfile, Config)
  • Registry System (Index, Pages)
  • Gpack Repositories (Manifest, Templates, RDF, Queries)

6. Sequence Diagram (C4_marketplace_sequence.puml)

Purpose: Detailed sequence of interactions for key workflows Key Elements:

  • Search Workflow
  • Add Workflow
  • Generate Workflow
  • Update Workflow
  • Remove Workflow

7. Deployment Diagram (C4_marketplace_deployment.puml)

Purpose: Shows how the system is deployed across different environments Key Elements:

  • Developer Machine (Local installation)
  • GitHub Platform (Registry repo, Gpack repos, Pages)
  • Network (HTTPS, Git protocol)
  • Security considerations

8. Security Model (C4_marketplace_security.puml)

Purpose: Documents the security architecture and threat model Key Elements:

  • Trust boundaries and relationships
  • Security controls (SHA256, License, Path, Sandbox, Network, Static Analysis)
  • Security threats and mitigations
  • Trust levels (Trusted, Semi-trusted, Untrusted)

9. Error Handling (C4_marketplace_error_handling.puml)

Purpose: Documents error scenarios and recovery strategies Key Elements:

  • Network errors, Pack not found, Version resolution errors
  • Download errors, Integrity verification errors
  • Lockfile errors, Template resolution errors
  • Cache corruption, Compatibility errors
  • Recovery strategies and user guidance

10. Performance & Scalability (C4_marketplace_performance.puml)

Purpose: Documents performance characteristics and scalability considerations Key Elements:

  • Performance optimizations (Local caching, Index caching, Parallel downloads)
  • Incremental updates, Compression, CDN distribution
  • Performance metrics and monitoring
  • Scalability limits and considerations

Usage

These diagrams can be rendered using PlantUML:

# Install PlantUML
npm install -g plantuml

# Render all diagrams
plantuml docs/diagrams/C4_marketplace_*.puml

# Render specific diagram
plantuml docs/diagrams/C4_marketplace_context.puml

Key Lifecycle Flows

Consumer Lifecycle

  1. Search → Find gpacks in registry
  2. Add → Download and cache gpacks
  3. List → Show installed gpacks
  4. Generate → Use gpack templates
  5. Update → Update to latest versions
  6. Remove → Clean up gpacks

Publisher Lifecycle

  1. Init → Create new gpack structure
  2. Lint → Validate gpack manifest
  3. Test → Test template rendering
  4. Publish → Submit to registry via PR
  5. Validation → Automated CI/CD checks
  6. Deployment → Registry index update

Error Recovery

  • Network errors → Retry with exponential backoff
  • Integrity errors → Re-download and verify
  • Cache corruption → Clear and re-download
  • Compatibility errors → Suggest version updates
  • Template errors → Provide helpful diagnostics

Security Considerations

  • Trust boundaries clearly defined
  • Sandboxed execution for templates
  • SHA256 verification for integrity
  • License validation for compliance
  • Path sanitization for security
  • Network controls for access restriction

Performance Characteristics

  • Local caching for fast access
  • CDN distribution for global performance
  • Parallel downloads for efficiency
  • Incremental updates for minimal transfers
  • Compression for bandwidth optimization

These diagrams provide comprehensive documentation of the marketplace system architecture, covering all aspects from high-level context to detailed implementation, security, and performance considerations.