Overview

Six best practices chapters are currently stubs (9 lines each):

• best-practices/error-handling.md
• best-practices/api-design.md
• best-practices/builder-pattern.md
• best-practices/type-safety.md
• best-practices/performance.md
• best-practices/documentation-standards.md

The aprender codebase demonstrates excellent Rust patterns that should be documented as best practices for users.

Deliverables

1. Error Handling (best-practices/error-handling.md)

   • AprenderError design and variants
   • Result usage patterns
   • Error context and debugging
   • Recovery strategies
   • Examples from linear_model, cluster modules

2. API Design (best-practices/api-design.md)

   • Estimator trait pattern (fit/predict/score)
   • Builder pattern for configuration
   • Method chaining
   • Sensible defaults
   • Examples from KMeans, Ridge, etc.

3. Builder Pattern (best-practices/builder-pattern.md)

   • with_* methods for optional parameters
   • Progressive construction
   • Compile-time validation
   • Examples from all major algorithms

4. Type Safety (best-practices/type-safety.md)

   • Generic constraints
   • Type-driven design
   • Preventing runtime errors
   • Matrix/Vector type safety
   • Examples from primitives module

5. Performance (best-practices/performance.md)

   • SIMD usage via trueno
   • Memory layout considerations
   • Avoiding allocations
   • Benchmarking patterns
   • Examples from performance-critical code

6. Documentation Standards (best-practices/documentation-standards.md)

   • Rustdoc conventions
   • Code examples in docs
   • Doctest patterns
   • Module-level documentation
   • Examples from aprender codebase

Acceptance Criteria

• Each chapter has 150+ lines of comprehensive content
• Code examples from aprender codebase
• Clear do's and don'ts
• References to actual implementations
• Best practices grounded in real code

Priority

Start with Error Handling, API Design, and Builder Pattern as these are most critical for users.