# Requirements Document

## Introduction

This document specifies requirements for Jetliner's documentation system. The goal is to create comprehensive, user-friendly documentation that serves both new users getting started and experienced developers looking for detailed API references. The documentation will consist of enhanced README examples and a MkDocs-based documentation site published via GitHub Actions.

## Glossary

- **MkDocs**: A static site generator designed for building project documentation from Markdown files
- **Material_Theme**: The Material for MkDocs theme providing modern styling and features
- **API_Reference**: Auto-generated documentation from Python docstrings and type hints
- **Code_Example**: Runnable code snippets demonstrating library usage
- **GitHub_Pages**: GitHub's static site hosting service for publishing documentation
- **Docstring**: Python documentation strings embedded in source code

## Requirements

### Requirement 1: README Enhancement

**User Story:** As a developer discovering Jetliner, I want to see clear usage examples in the README, so that I can quickly understand if the library meets my needs.

#### Acceptance Criteria

1. THE README SHALL include a quick-start example showing basic file reading with `scan()`
2. THE README SHALL include an example demonstrating S3 file access
3. THE README SHALL include an example showing query optimization (projection/predicate pushdown)
4. THE README SHALL include an example using the `open()` iterator API for streaming control
5. THE README SHALL include installation instructions for pip/uv
6. WHEN examples are shown, THE README SHALL use realistic, runnable code snippets
7. THE README SHALL link to the full documentation site for detailed information

### Requirement 2: Documentation Site Structure

**User Story:** As a user, I want well-organized documentation, so that I can find information quickly.

#### Acceptance Criteria

1. THE Documentation_Site SHALL use MkDocs with Material_Theme for modern styling
2. THE Documentation_Site SHALL include a Getting Started guide as the landing page
3. THE Documentation_Site SHALL include a User Guide section covering common workflows
4. THE Documentation_Site SHALL include an API Reference section with complete function/class documentation
5. THE Documentation_Site SHALL include a Performance section with benchmarks and optimization tips
6. THE Documentation_Site SHALL include a Contributing guide for potential contributors
7. THE Documentation_Site SHALL support full-text search across all pages
8. THE Documentation_Site SHALL include navigation breadcrumbs and sidebar

### Requirement 3: Getting Started Guide

**User Story:** As a new user, I want step-by-step instructions to get Jetliner working, so that I can start using it quickly.

#### Acceptance Criteria

1. THE Getting_Started_Guide SHALL include installation instructions for multiple methods (pip, uv, from source)
2. THE Getting_Started_Guide SHALL include a minimal working example
3. THE Getting_Started_Guide SHALL explain the two main APIs (`scan()` vs `open()`) and when to use each
4. THE Getting_Started_Guide SHALL include verification steps to confirm successful installation
5. THE Getting_Started_Guide SHALL list system requirements and dependencies

### Requirement 4: User Guide Content

**User Story:** As a user, I want detailed guides for common tasks, so that I can effectively use all library features.

#### Acceptance Criteria

1. THE User_Guide SHALL include a section on reading local Avro files
2. THE User_Guide SHALL include a section on reading from S3 with authentication options
3. THE User_Guide SHALL include a section on query optimization (projection, predicate, early stopping)
4. THE User_Guide SHALL include a section on streaming large files with memory constraints
5. THE User_Guide SHALL include a section on error handling and recovery modes
6. THE User_Guide SHALL include a section on schema inspection and type mapping
7. THE User_Guide SHALL include a section on supported codecs and their trade-offs
8. WHEN explaining features, THE User_Guide SHALL include practical code examples

### Requirement 5: API Reference

**User Story:** As a developer, I want complete API documentation, so that I can understand all available functions and parameters.

#### Acceptance Criteria

1. THE API_Reference SHALL document all public functions with parameters, return types, and exceptions
2. THE API_Reference SHALL document all public classes with their methods and attributes
3. THE API_Reference SHALL document all exception types with their meanings
4. THE API_Reference SHALL include usage examples for each major function
5. THE API_Reference SHALL be auto-generated from Python docstrings where possible
6. THE API_Reference SHALL include type annotations for all parameters and return values

### Requirement 6: Performance Documentation

**User Story:** As a performance-conscious developer, I want to understand Jetliner's performance characteristics, so that I can optimize my data pipelines.

#### Acceptance Criteria

1. THE Performance_Section SHALL include benchmark results comparing to other Avro readers
2. THE Performance_Section SHALL document memory usage patterns and configuration options
3. THE Performance_Section SHALL include optimization tips for different scenarios (Lambda, large files, S3)
4. THE Performance_Section SHALL explain buffer configuration parameters and their effects
5. THE Performance_Section SHALL include guidance on codec selection for different use cases

### Requirement 7: GitHub Actions Publishing

**User Story:** As a maintainer, I want documentation automatically published on changes, so that docs stay current with the code.

#### Acceptance Criteria

1. THE GitHub_Action SHALL build documentation on push to main branch
2. THE GitHub_Action SHALL deploy to GitHub Pages automatically
3. THE GitHub_Action SHALL validate documentation builds successfully before deployment
4. THE GitHub_Action SHALL support manual trigger for ad-hoc deployments
5. IF documentation build fails, THEN THE GitHub_Action SHALL report clear error messages

### Requirement 8: Code Examples Quality

**User Story:** As a user, I want code examples that actually work, so that I can trust the documentation.

#### Acceptance Criteria

1. THE Code_Examples SHALL be tested as part of the CI pipeline where feasible
2. THE Code_Examples SHALL use consistent style and formatting
3. THE Code_Examples SHALL include necessary imports and setup code
4. THE Code_Examples SHALL handle errors appropriately
5. WHEN examples require sample data, THE Documentation SHALL explain how to obtain or generate it
