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templating - Functional Specification

Version: v1.2.3 | Status: Active | Last Updated: March 2026

Purpose

Templating module providing template engine support (Jinja2, Mako) for code generation, documentation templates, and dynamic content. Consolidates template/ and module_template/ functionality.

Design Principles

Modularity

  • Engine-agnostic template interface
  • Support for multiple template engines
  • Pluggable template system

Internal Coherence

  • Unified template rendering
  • Consistent template patterns
  • Integration with code generation

Parsimony

  • Essential templating operations
  • Minimal dependencies
  • Focus on common engines

Functionality

  • Working implementations for common engines
  • Support for template inheritance
  • Template caching

Testing

  • Unit tests for all engines
  • Integration tests with templates
  • Template rendering tests

Documentation

  • Complete API specifications
  • Usage examples for each engine
  • Template syntax documentation

Architecture

graph TD
    TemplateInterface[Template Interface]
    Jinja2Engine[Jinja2 Engine]
    MakoEngine[Mako Engine]
    TemplateManager[Template Manager]
    TemplateCache[Template Cache]
    
    TemplateInterface --> Jinja2Engine
    TemplateInterface --> MakoEngine
    TemplateManager --> TemplateInterface
    TemplateCache --> TemplateInterface
Loading

Functional Requirements

Core Operations

  1. Render: Render templates with context
  2. Load: Load templates from files or strings
  3. Cache: Cache compiled templates
  4. Inheritance: Support template inheritance
  5. Filters: Custom template filters

Integration Points

  • module_template/ - Module generation templates
  • documentation/ - Documentation templates
  • code/ - Code generation templates

Quality Standards

Code Quality

  • Type hints for all functions
  • PEP 8 compliance
  • Comprehensive error handling

Testing Standards

  • ≥80% coverage
  • Engine-specific tests
  • Template rendering tests

Documentation Standards

  • README.md, AGENTS.md, SPEC.md
  • API_SPECIFICATION.md
  • USAGE_EXAMPLES.md

Interface Contracts

Template Interface

class TemplateEngine:
    def render(template: str, context: dict) -> str
    def load_template(path: str) -> Template
    def register_filter(name: str, func: callable) -> None

Implementation Guidelines

Template Implementation

  1. Implement Template interface for each engine
  2. Handle template loading and rendering
  3. Support template caching
  4. Provide filter registration

Integration

  1. Integrate with module_template
  2. Add templating to documentation
  3. Support code generation

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