feat: comprehensive template improvements with configuration support

[mgiovani]

🚀 Comprehensive Template Improvements

This PR consolidates all template improvements from individual PRs into a single comprehensive update.

📦 Consolidated PRs:

• RFC Templates (was PR feat: add multiple RFC template variants #16) - Multiple RFC template variants with configuration support
• Onboarding Templates (was PR feat: add multiple onboarding template variants #15) - Enhanced onboarding variants + data model templates
• Architecture Templates (was PR feat: enhance architecture templates with Google, Enterprise, and Arc42 variants #14) - Industry-standard architecture documentation templates

---

✨ New Features:

🗂️ RFC Templates

• 3 variants: minimal, standard, detailed
• Configurable via .cursor-init.yaml
• Industry-standard RFC structure with proper lifecycle

👥 Onboarding Templates

• 3 variants: developer, contributor, user
• Role-specific onboarding flows
• Comprehensive project setup guides

🏗️ Architecture Templates

• 3 variants: google_style, enterprise, arc42
• Industry-standard architecture documentation
• Mermaid diagram integration
• Component relationship mapping

📊 Data Model Templates

• 2 variants: simple, comprehensive
• Enhanced ER diagram generation
• Database schema documentation

---

⚙️ Configuration System:

All slash commands now respect template choices via .cursor-init.yaml:

templates:
  adr: "nygard_style"          # nygard_style, full, lightweight, madr
  architecture: "google_style"  # google_style, enterprise, arc42  
  onboarding: "developer"       # developer, contributor, user
  rfc: "standard"              # minimal, standard, detailed
  data_model: "simple"         # simple, comprehensive

---

🔧 Updated Slash Commands:

✅ Configuration-Aware Commands:

• /adr - Uses configured ADR template variant
• /rfc - Uses configured RFC template variant
• /gen-er-diagram - Uses configured data model template
• /init-docs - Uses configured templates for all document types

📋 All Commands:

• /init-docs - Create initial documentation structure
• /update-docs - Update existing documentation
• /adr "Title" - Create Architecture Decision Record
• /rfc "Title" - Create Request For Comments document
• /gen-er-diagram - Generate ER diagram from SQLAlchemy models
• /gen-arch-diagram - Generate system architecture diagram
• /check-docs - Validate documentation freshness
• /sync-docs - Sync all documentation with codebase

---

📁 Template Structure:

.cursor/templates/
├── adr/
│   ├── adr_template_nygard_style.md
│   ├── adr_template_full.md
│   ├── adr_template_lightweight.md
│   └── adr_template_madr.md
├── architecture/
│   ├── architecture_google_style.md
│   ├── architecture_enterprise.md
│   └── architecture_arc42.md
├── onboarding/
│   ├── onboarding_developer.md
│   ├── onboarding_contributor.md
│   └── onboarding_user.md
├── rfc/
│   ├── rfc_template_minimal.md
│   ├── rfc_template_standard.md
│   └── rfc_template_detailed.md
└── diagrams/
    ├── data_model_simple.md
    └── data_model_comprehensive.md

---

🎯 Benefits:

• Consistency: All templates follow industry standards
• Flexibility: Multiple variants for different use cases
• Configuration: Easy customization via YAML config
• Maintenance: Single source of truth for all templates
• Documentation: Comprehensive template documentation

---

🧪 Testing:

Template improvements have been tested with:

• Configuration file detection and parsing
• Template variant selection
• Placeholder replacement system
• Multi-framework compatibility (Python/FastAPI, TypeScript/React)

---

🔄 Migration:

This PR maintains backward compatibility. Existing projects will continue to work with default template selections if no configuration file is present.

---

Closes: #14, #15, #16

---

📚 Documentation Updates:

• Updated docs/development/template-customization.md with comprehensive guide
• Enhanced .cursor-init.example.yaml with all template options
• Industry-standard content for all template variants
• Consistent placeholder system across all templates

Ready for review and merge! 🎉

[Copilot]

Pull Request Overview

This comprehensive PR consolidates multiple template improvements and introduces configuration support via the .cursor-init.yaml file. Key changes include the addition of detailed architecture documentation in the customization guide, new RFC, onboarding, and data model templates, and updates to configuration options for template selection.

Reviewed Changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
docs/development/template-customization.md	Added a new “Architecture Documentation” section with configuration examples for Google, Enterprise, and Arc42 templates
.cursor/templates/rfc/*	Introduced RFC template variants (minimal, standard, detailed)
.cursor/templates/onboarding/*	Added role-specific onboarding templates while removing legacy ones
.cursor/templates/diagrams/*	Introduced simple and comprehensive data model templates
.cursor/templates/architecture/*	Added architecture documentation templates with detailed design sections
.cursor/rules/cursor-init/diagrams/gen-er-diagram.mdc	Updated steps to reference template configuration for ER diagram generation
.cursor-init.example.yaml	Updated default template selections for onboarding, RFC, and data model documentation

Comments suppressed due to low confidence (2)

docs/development/template-customization.md:65

• The template name architecture_google.md does not match the actual file name (architecture_google_style.md) in the repository. Consider updating the documented name for consistency.

**Template:** `architecture_google.md`

docs/development/template-customization.md:87

• The template name architecture_arc.md is inconsistent with the expected file name (architecture_arc42.md). Please update the markup to match the repository file for clarity.

**Template:** `architecture_arc.md`

[mgiovani]

🔧 Data Model Improvements Added

Just updated the PR to include the complete data model improvements that were missing:

✅ Enhanced Data Model Templates:

📊 Comprehensive Template (264 lines)

• Database information section with metadata
• Detailed entity definitions with attributes, relationships, business rules
• Performance considerations (indexing, query optimization, partitioning)
• Security and access control documentation
• Migration and versioning strategies
• Data lifecycle management (retention, archival, backup)
• API integration mapping
• Testing, monitoring, and troubleshooting sections
• Full schema DDL and seed data appendices

📋 Simple Template (45 lines)

• Basic ER diagram with entity overview
• Essential relationship documentation
• Lightweight for quick documentation needs

⚙️ Configuration Update:

# Now defaults to comprehensive for richer documentation
templates:
  data_model: "comprehensive"  # Was: "simple" 

🚀 Enhanced ER Diagram Generation:

The /gen-er-diagram command now:

• ✅ Generates comprehensive data documentation by default
• ✅ Includes all enterprise-level sections (performance, security, lifecycle)
• ✅ Provides detailed entity analysis with business rules
• ✅ Supports both simple and comprehensive variants via configuration
• ✅ Creates production-ready database documentation

📁 Template Structure:

.cursor/templates/diagrams/
├── data_model_comprehensive.md    # 264 lines - Enterprise-grade
└── data_model_simple.md          # 45 lines - Quick overview

The data model improvements are now fully integrated! 🎉

Key Benefits:

• Enterprise-ready: Comprehensive documentation meets production standards
• Configurable: Choose between simple and comprehensive based on needs
• Default Quality: Comprehensive template ensures thorough documentation by default
• Industry Standards: Follows database documentation best practices

[mgiovani]

🎯 Additional Template Improvements Added

Just added the missing template enhancements for the diagram templates:

✅ Enhanced Diagram Templates:

🏗️ Component Diagram Template (previously empty - 0 bytes)

Now: 240+ lines of comprehensive system architecture documentation

Features:

• Visual component architecture with Mermaid diagrams
• Detailed component descriptions by layer (Presentation, Application, Data)
• Communication patterns (sync/async)
• Data flow diagrams
• Deployment architecture
• Security considerations
• Performance metrics
• Development guidelines
• Change log tracking

📊 ER Diagram Template (previously basic - 13 lines)

Now: 180+ lines of detailed database documentation

Features:

• Comprehensive entity relationship diagrams with examples
• Entity descriptions with attributes and relationships
• Database constraints (PK, FK, unique, check)
• Performance indexes
• Business rules documentation
• Migration history
• Data types and custom types
• Schema versioning

📁 Updated Template Structure:

.cursor/templates/diagrams/
├── component_diagram.md          # 240+ lines - System architecture
├── er_diagram.md                 # 180+ lines - Database schema
├── data_model_comprehensive.md   # 264 lines - Enterprise data model
└── data_model_simple.md          # 45 lines - Basic data model

🔧 Integration with Slash Commands:

These templates integrate with:

• /gen-arch-diagram - Uses component_diagram.md for system architecture
• /gen-er-diagram - Uses er_diagram.md for database schemas
• /init-docs - Can reference these templates for comprehensive documentation

🎉 Complete Template Coverage:

PR #17 now includes comprehensive improvements for ALL template categories:

• ✅ ADR Templates (4 variants)
• ✅ Architecture Templates (3 variants)
• ✅ Onboarding Templates (3 variants)
• ✅ RFC Templates (3 variants)
• ✅ Data Model Templates (2 variants)
• ✅ Diagram Templates (2 enhanced templates)

Total: 17 comprehensive templates with industry-standard content! 🚀

All templates now follow consistent:

• Placeholder system ({{VARIABLE}})
• Professional formatting and structure
• Comprehensive documentation coverage
• Industry best practices
• Mermaid diagram integration

The template system is now complete and ready for production use!