Documentation: Rustdoc, mdbook Site & Migration Guide

[unclesp1d3r]

Documentation: Rustdoc, mdbook Site & Migration Guide

Overview

Create comprehensive documentation for Phase 1 MVP including rustdoc for all public APIs, mdbook documentation site with guides and examples, and migration information for users coming from C libmagic. This ensures the MVP is "ready for early adopters" per Epic Brief success criteria.

Scope

In Scope:

• Rustdoc for all public APIs with examples
• mdbook documentation site structure
• Getting started guide
• Library API guide with usage patterns
• CLI reference documentation
• Migration guide from C libmagic
• Architecture overview
• Examples for common use cases

Out of Scope:

• Advanced tutorials (deferred to Phase 2)
• Video tutorials
• API reference beyond rustdoc
• Performance tuning guide (deferred to Phase 3)

Technical Approach

1. Rustdoc Coverage

Ensure all public APIs have comprehensive rustdoc:

file:src/lib.rs:

• MagicDatabase struct and all methods
• EvaluationConfig struct and presets
• EvaluationResult and EvaluationMetadata structs
• MatchResult struct
• All error types

file:src/parser/mod.rs:

• load_magic_file() function
• Public parsing functions

file:src/evaluator/mod.rs:

• Public evaluation functions

Example Rustdoc Pattern:

/// Load magic rules from a file or directory
///
/// This function automatically detects the format (text file, directory, or binary .mgc)
/// and loads the magic rules accordingly. Binary .mgc files are not supported in Phase 1
/// and will return an error with suggestions for alternatives.
///
/// # Arguments
///
/// * `path` - Path to magic file or Magdir directory
///
/// # Errors
///
/// Returns `LibmagicError::IoError` if the file/directory cannot be read.
/// Returns `LibmagicError::ParseError` if the magic file format is invalid.
/// Returns `LibmagicError::UnsupportedFormat` if a binary .mgc file is encountered.
///
/// # Examples
///
/// ```rust
/// use libmagic_rs::MagicDatabase;
///
/// // Load from text file
/// let db = MagicDatabase::load_from_file("/usr/share/misc/magic")?;
///
/// // Load from Magdir directory
/// let db = MagicDatabase::load_from_file("/usr/share/file/magic/Magdir")?;
///
/// // Use built-in rules
/// let db = MagicDatabase::with_builtin_rules();
/// # Ok::<(), Box<dyn std::error::Error>>(())
/// ```
pub fn load_from_file<P: AsRef<Path>>(path: P) -> Result<Self>

2. mdbook Site Structure

Create file:docs/book/ with mdbook configuration:

file:docs/book/book.toml:

[book]
title = "libmagic-rs Documentation"
authors = ["libmagic-rs Contributors"]
language = "en"
multilingual = false
src = "src"

[build]
build-dir = "book"

[output.html]
default-theme = "light"
git-repository-url = "https://github.com/yourusername/libmagic-rs"

Documentation Structure:

docs/book/src/
├── SUMMARY.md
├── introduction.md
├── getting-started.md
├── library-api.md
├── cli-reference.md
├── migration-guide.md
├── architecture.md
└── examples/
    ├── basic-usage.md
    ├── advanced-config.md
    └── custom-rules.md

3. Getting Started Guide

file:docs/book/src/getting-started.md:

Content should cover:

• Installation instructions
• Quick start with CLI
• Quick start with library API
• Common use cases
• Troubleshooting

4. Library API Guide

file:docs/book/src/library-api.md:

Content should cover:

• Simple API usage (load_from_file())
• Builder pattern for advanced configuration
• Evaluating files vs buffers
• Error handling patterns
• Configuration options explained
• Best practices

5. CLI Reference

file:docs/book/src/cli-reference.md:

Content should cover:

• All CLI flags and arguments
• Output formats (text vs JSON)
• Magic file discovery
• Built-in rules usage
• Exit codes
• Examples for common scenarios

6. Migration Guide

file:docs/book/src/migration-guide.md:

Content should cover:

• Differences from C libmagic
• API mapping (C functions → Rust methods)
• Configuration migration
• Error handling differences
• Performance considerations
• Known limitations in Phase 1

7. Architecture Overview

file:docs/book/src/architecture.md:

Content should cover:

• OpenBSD-inspired approach
• Parser-evaluator pipeline
• Module organization
• Data structures
• Design decisions and rationale

8. Examples

file:docs/book/src/examples/basic-usage.md:

• Simple file type detection
• Batch processing
• Stdin processing

file:docs/book/src/examples/advanced-config.md:

• Custom configuration
• Timeout handling
• MIME type mapping

file:docs/book/src/examples/custom-rules.md:

• Writing magic rules
• Testing custom rules
• Debugging rules

Acceptance Criteria

Rustdoc

• All public APIs have rustdoc comments
• All rustdoc includes examples
• All rustdoc examples compile and run
• cargo doc builds without warnings
• cargo test --doc passes all doc tests

mdbook Site

• mdbook site builds successfully
• All pages render correctly
• Navigation structure is clear
• Code examples are syntax-highlighted
• Links between pages work
• External links are valid

Content Quality

• Getting started guide covers installation and first use
• Library API guide covers all major use cases
• CLI reference documents all flags
• Migration guide addresses C libmagic users
• Architecture overview explains design decisions
• Examples are practical and tested

Integration

• Documentation builds in CI/CD
• Documentation published to GitHub Pages or similar
• README links to documentation
• Cargo.toml includes documentation link

Dependencies

• Depends on: All implementation tickets (documents the complete implementation)
  • ticket:75a688c2-0ac4-489a-a35d-6e824c94c153/c554e409-ae60-407f-9596-64c5b03a9b92 (Parser Integration)
  • ticket:75a688c2-0ac4-489a-a35d-6e824c94c153/bb48e54f-995b-448e-add8-fe1546bfa9d9 (CLI Enhancements)
  • ticket:75a688c2-0ac4-489a-a35d-6e824c94c153/5fa9fb36-a0bf-4d1b-924a-41a0a39f126e (Built-in Rules)
  • ticket:75a688c2-0ac4-489a-a35d-6e824c94c153/33ad363d-27da-40ad-94bb-e1e24bd5cb39 (Evaluation Enhancements)
  • ticket:75a688c2-0ac4-489a-a35d-6e824c94c153/fae78198-06dc-4d77-ab4a-1cc1f7e117a4 (Strength Calculation)
  • ticket:75a688c2-0ac4-489a-a35d-6e824c94c153/b0addca4-6d49-407e-89c8-a8262b4219d8 (Test Infrastructure)

Related Specs

• spec:75a688c2-0ac4-489a-a35d-6e824c94c153/3ce0475b-153d-487f-bc0d-47d0a8f6708a (Epic Brief - Documentation Requirements)

Files to Create

• file:docs/book/book.toml - mdbook configuration
• file:docs/book/src/SUMMARY.md - Table of contents
• file:docs/book/src/introduction.md - Introduction
• file:docs/book/src/getting-started.md - Getting started guide
• file:docs/book/src/library-api.md - Library API guide
• file:docs/book/src/cli-reference.md - CLI reference
• file:docs/book/src/migration-guide.md - Migration guide
• file:docs/book/src/architecture.md - Architecture overview
• file:docs/book/src/examples/*.md - Example guides

Files to Modify

• All file:src/**/*.rs files - Add/enhance rustdoc comments
• file:README.md - Add documentation links
• file:Cargo.toml - Add documentation metadata
• file:.github/workflows/docs.yml - Add mdbook build and deployment

[traycerai]

Plan

Observations

The libmagic-rs project requires comprehensive Phase 1 MVP documentation to achieve "ready for early adopters" status. The ticket provides detailed technical specifications including rustdoc patterns, mdbook structure, and specific content requirements for each guide. The scope is tightly bounded: in-scope are rustdoc for all public APIs, mdbook site with core guides (getting started, library API, CLI reference, migration, architecture), and practical examples; out-of-scope are advanced tutorials, video content, and performance tuning guides (deferred to Phase 2 and Phase 3). The documentation must integrate with CI/CD and publish to GitHub Pages.

Approach

The plan delivers Phase 1 MVP documentation across three integrated tracks: (1) comprehensive rustdoc for all public APIs with compilable examples following the specified pattern, (2) mdbook documentation site with structured guides addressing specific user personas (new users, library users, CLI users, C libmagic migrants), and (3) practical examples demonstrating common use cases. The implementation prioritizes quality assurance through automated testing (doctests, mdbook builds, CI/CD integration) and clear acceptance criteria. Documentation is treated as a first-class deliverable with the same rigor as code.

Implementation Plan

1. Rustdoc for Public APIs (Phase 1 MVP Scope)

1.1 Core Public API Documentation

• file:src/lib.rs - Primary Public APIs

  • MagicDatabase struct: comprehensive documentation with examples for load_from_file(), evaluate_file(), evaluate_buffer(), and with_builtin_rules()
  • EvaluationConfig struct: document all configuration options with examples showing presets and custom configurations
  • EvaluationResult and EvaluationMetadata structs: document all fields and their meanings
  • MatchResult struct: document match details, confidence, and metadata
  • All error types (LibmagicError variants): document each error case with examples of when it occurs
  • Module-level documentation explaining the library's purpose and basic usage patterns

• file:src/parser/mod.rs - Parser Public API

  • load_magic_file() function: document with examples for loading text files and directories
  • Document format detection (text file vs directory vs binary .mgc)
  • Include error handling examples for unsupported formats
  • Add examples showing successful parsing of standard magic files
  • Follow the specified rustdoc pattern from ticket technical approach

• file:src/evaluator/mod.rs - Evaluator Public API

  • Public evaluation functions: document with examples
  • Configuration impact on evaluation: document how EvaluationConfig affects results
  • Error handling during evaluation: document timeout and resource limit errors

1.2 Rustdoc Quality Standards and Pattern

• All public APIs must have rustdoc comments following the specified pattern:
  • Clear description of purpose and behavior
  • Arguments section documenting all parameters with types and constraints
  • Returns section documenting return values and their meaning
  • Errors section documenting all error cases with conditions that trigger them
  • Examples section with at least one working, compilable example
  • All examples must compile and pass cargo test --doc
• Use consistent formatting and terminology across all rustdoc
• Link related types and functions using rustdoc links ([Type], [function()])
• Follow the example pattern provided in ticket: include # Examples header, use ? operator in examples, include Ok::<(), Box<dyn std::error::Error>>(()) for examples that return Result

2. mdbook Documentation Site (Phase 1 MVP Scope)

2.1 mdbook Configuration and Structure

• file:docs/book/book.toml - Create mdbook configuration with:

  • Title: "libmagic-rs Documentation"
  • Authors: "libmagic-rs Contributors"
  • Language: "en"
  • Build output directory: "book"
  • HTML theme configuration with default light theme
  • Git repository URL for edit links: https://github.com/yourusername/libmagic-rs
  • Follow the exact TOML structure provided in ticket technical approach

• file:docs/book/src/SUMMARY.md - Create table of contents with:

  • Introduction
  • Getting Started
  • Library API Guide
  • CLI Reference
  • Migration Guide
  • Architecture Overview
  • Examples section with subsections

2.2 Core Documentation Chapters (Phase 1 MVP)

• file:docs/book/src/introduction.md - Introduction

  • Brief overview of libmagic-rs and its purpose
  • Key features and benefits compared to C libmagic
  • Links to getting started and main guides
  • Target audience: new users and C libmagic migrants

• file:docs/book/src/getting-started.md - Getting Started Guide

  • Installation instructions (cargo add, from source, building locally)
  • Quick start with CLI (basic file identification example)
  • Quick start with library API (simple example with MagicDatabase)
  • Common use cases overview (file type detection, batch processing, custom rules)
  • Troubleshooting section for common issues (file not found, permission errors, etc.)

• file:docs/book/src/library-api.md - Library API Guide

  • Simple API usage: MagicDatabase::with_builtin_rules() and evaluate_file()
  • Loading custom magic files: load_from_file() with examples
  • Builder pattern for advanced configuration with EvaluationConfig
  • Configuration presets and their use cases
  • Error handling patterns with Result and LibmagicError
  • Evaluating files vs buffers (when to use each)
  • Best practices for library usage (resource management, error handling, performance)

• file:docs/book/src/cli-reference.md - CLI Reference

  • All CLI flags and arguments documented with descriptions
  • Output formats: text vs JSON with examples
  • Magic file discovery and built-in rules usage
  • Exit codes documentation with meanings
  • Examples for common scenarios (single file, multiple files, stdin, JSON output)

• file:docs/book/src/migration-guide.md - Migration Guide from C libmagic

  • Key differences from C libmagic (API design, error handling, configuration approach)
  • API mapping table: C functions → Rust methods (magic_open, magic_load, magic_file, etc.)
  • Configuration migration examples (comparing C magic_set_flags to Rust EvaluationConfig)
  • Error handling differences with examples (C errno vs Rust Result/LibmagicError)
  • Known limitations in Phase 1 (binary .mgc files not supported, specific features deferred)
  • Performance considerations and optimization tips

• file:docs/book/src/architecture.md - Architecture Overview

  • OpenBSD-inspired approach explanation and rationale
  • Parser-evaluator pipeline overview with conceptual diagram
  • Module organization (parser, evaluator, io, output, error modules)
  • Key data structures (AST representation, MatchResult, EvaluationConfig)
  • Design decisions and rationale (why certain choices were made)

2.3 Examples Section (Phase 1 MVP)

• file:docs/book/src/examples.md - Examples Overview

  • Links to example code in repository
  • Brief descriptions of each example and its use case

• file:docs/book/src/examples/basic-usage.md - Basic Usage Examples

  • Simple file type detection with code examples
  • Batch processing multiple files with iteration
  • Processing stdin with error handling

• file:docs/book/src/examples/advanced-config.md - Advanced Configuration Examples

  • Custom EvaluationConfig usage with specific options
  • Timeout and resource limit handling with examples
  • MIME type mapping (if available in Phase 1)

• file:docs/book/src/examples/custom-rules.md - Custom Magic Rules Examples

  • Writing simple magic rules with syntax explanation
  • Testing custom rules with examples
  • Debugging rule evaluation and troubleshooting

3. Rustdoc Examples and Code Samples

3.1 Create Compilable Examples

• examples/basic_usage.rs - Simple file identification example demonstrating MagicDatabase usage
• examples/custom_config.rs - Configuration options example showing EvaluationConfig usage
• examples/json_output.rs - JSON output format example (if applicable in Phase 1)
• examples/error_handling.rs - Error handling patterns example with LibmagicError handling

3.2 Ensure Examples Compile and Test

• All examples must compile with cargo build --examples
• All rustdoc examples must pass cargo test --doc
• Examples should be practical and demonstrate real use cases from the library API guide
• Examples in rustdoc should follow the pattern: use ? operator, include Ok::<(), Box<dyn std::error::Error>>(()) for Result types

4. Documentation Integration and Publishing

4.1 CI/CD Integration

• file:.github/workflows/docs.yml - Create or update workflow to:
  • Build rustdoc with cargo doc --no-deps and fail on warnings
  • Build mdbook with mdbook build docs/book
  • Run doctests with cargo test --doc to verify all examples compile and run
  • Deploy to GitHub Pages (if configured) or publish to docs.rs
  • Fail the workflow on any documentation warnings or build failures
  • Run on push to main and pull requests to catch documentation issues early

4.2 Project Metadata Updates

• file:Cargo.toml - Add documentation metadata:

  • documentation field pointing to GitHub Pages or docs.rs URL
  • homepage field (if applicable)
  • repository field (already present)
  • Ensure metadata is accurate for documentation discovery

• file:README.md - Add documentation links:

  • Link to mdbook documentation site in prominent location
  • Link to rustdoc on docs.rs or GitHub Pages
  • Quick start section referencing getting started guide
  • Link to migration guide for C libmagic users

5. Quality Assurance and Acceptance Criteria

5.1 Rustdoc Quality Checks

• All public APIs in file:src/lib.rs have rustdoc comments
• All public APIs in file:src/parser/mod.rs have rustdoc comments
• All public APIs in file:src/evaluator/mod.rs have rustdoc comments
• All rustdoc includes: description, arguments, returns, errors, examples
• All examples compile and pass cargo test --doc
• cargo doc --no-deps builds without warnings
• Consistent terminology and formatting across all rustdoc
• Rustdoc examples follow the specified pattern (use ?, include Ok::<(), Box<dyn std::error::Error>>(()))

5.2 mdbook Quality Checks

• mdbook builds successfully with mdbook build docs/book
• All pages render correctly in HTML output
• Navigation structure is clear and logical (SUMMARY.md structure)
• Code examples have proper syntax highlighting
• Internal links between pages work correctly
• External links are valid and accessible
• mdbook configuration (book.toml) is correct and complete

5.3 Content Quality Checks

• Getting started guide covers installation (cargo add, from source) and first use
• Getting started guide includes quick start with CLI and library API
• Getting started guide includes troubleshooting section
• Library API guide covers all major use cases (load_from_file, evaluate_file, evaluate_buffer, with_builtin_rules)
• Library API guide covers configuration with EvaluationConfig and presets
• Library API guide covers error handling patterns
• CLI reference documents all flags and options
• CLI reference documents output formats (text vs JSON)
• CLI reference documents exit codes
• Migration guide addresses C libmagic users with practical examples
• Migration guide includes API mapping table (C functions → Rust methods)
• Migration guide documents known Phase 1 limitations
• Architecture overview explains OpenBSD-inspired approach
• Architecture overview explains parser-evaluator pipeline
• Architecture overview documents module organization
• Examples are practical, tested, and demonstrate real use cases
• Examples cover basic usage, advanced configuration, and custom rules

5.4 Integration Checks

• Documentation builds successfully in CI/CD (GitHub Actions)
• Documentation publishes to GitHub Pages or docs.rs
• README links to documentation site
• README links to rustdoc
• Cargo.toml includes documentation link
• CI/CD workflow fails on documentation warnings

Import In IDE

🤖 Prompt for AI Agents

## Observations

The libmagic-rs project requires comprehensive Phase 1 MVP documentation to achieve "ready for early adopters" status. The ticket provides detailed technical specifications including rustdoc patterns, mdbook structure, and specific content requirements for each guide. The scope is tightly bounded: in-scope are rustdoc for all public APIs, mdbook site with core guides (getting started, library API, CLI reference, migration, architecture), and practical examples; out-of-scope are advanced tutorials, video content, and performance tuning guides (deferred to Phase 2 and Phase 3). The documentation must integrate with CI/CD and publish to GitHub Pages.

## Approach

The plan delivers Phase 1 MVP documentation across three integrated tracks: (1) comprehensive rustdoc for all public APIs with compilable examples following the specified pattern, (2) mdbook documentation site with structured guides addressing specific user personas (new users, library users, CLI users, C libmagic migrants), and (3) practical examples demonstrating common use cases. The implementation prioritizes quality assurance through automated testing (doctests, mdbook builds, CI/CD integration) and clear acceptance criteria. Documentation is treated as a first-class deliverable with the same rigor as code.

## Implementation Plan

### 1. Rustdoc for Public APIs (Phase 1 MVP Scope)

#### 1.1 Core Public API Documentation
- **file:src/lib.rs - Primary Public APIs**
  - `MagicDatabase` struct: comprehensive documentation with examples for `load_from_file()`, `evaluate_file()`, `evaluate_buffer()`, and `with_builtin_rules()`
  - `EvaluationConfig` struct: document all configuration options with examples showing presets and custom configurations
  - `EvaluationResult` and `EvaluationMetadata` structs: document all fields and their meanings
  - `MatchResult` struct: document match details, confidence, and metadata
  - All error types (`LibmagicError` variants): document each error case with examples of when it occurs
  - Module-level documentation explaining the library's purpose and basic usage patterns

- **file:src/parser/mod.rs - Parser Public API**
  - `load_magic_file()` function: document with examples for loading text files and directories
  - Document format detection (text file vs directory vs binary .mgc)
  - Include error handling examples for unsupported formats
  - Add examples showing successful parsing of standard magic files
  - Follow the specified rustdoc pattern from ticket technical approach

- **file:src/evaluator/mod.rs - Evaluator Public API**
  - Public evaluation functions: document with examples
  - Configuration impact on evaluation: document how EvaluationConfig affects results
  - Error handling during evaluation: document timeout and resource limit errors

#### 1.2 Rustdoc Quality Standards and Pattern
- All public APIs must have rustdoc comments following the specified pattern:
  - Clear description of purpose and behavior
  - Arguments section documenting all parameters with types and constraints
  - Returns section documenting return values and their meaning
  - Errors section documenting all error cases with conditions that trigger them
  - Examples section with at least one working, compilable example
  - All examples must compile and pass `cargo test --doc`
- Use consistent formatting and terminology across all rustdoc
- Link related types and functions using rustdoc links (`[Type]`, `[function()]`)
- Follow the example pattern provided in ticket: include `# Examples` header, use `?` operator in examples, include `Ok::<(), Box<dyn std::error::Error>>(())` for examples that return `Result`

### 2. mdbook Documentation Site (Phase 1 MVP Scope)

#### 2.1 mdbook Configuration and Structure
- **file:docs/book/book.toml** - Create mdbook configuration with:
  - Title: "libmagic-rs Documentation"
  - Authors: "libmagic-rs Contributors"
  - Language: "en"
  - Build output directory: "book"
  - HTML theme configuration with default light theme
  - Git repository URL for edit links: `https://github.com/yourusername/libmagic-rs`
  - Follow the exact TOML structure provided in ticket technical approach

- **file:docs/book/src/SUMMARY.md** - Create table of contents with:
  - Introduction
  - Getting Started
  - Library API Guide
  - CLI Reference
  - Migration Guide
  - Architecture Overview
  - Examples section with subsections

#### 2.2 Core Documentation Chapters (Phase 1 MVP)

- **file:docs/book/src/introduction.md** - Introduction
  - Brief overview of libmagic-rs and its purpose
  - Key features and benefits compared to C libmagic
  - Links to getting started and main guides
  - Target audience: new users and C libmagic migrants

- **file:docs/book/src/getting-started.md** - Getting Started Guide
  - Installation instructions (cargo add, from source, building locally)
  - Quick start with CLI (basic file identification example)
  - Quick start with library API (simple example with MagicDatabase)
  - Common use cases overview (file type detection, batch processing, custom rules)
  - Troubleshooting section for common issues (file not found, permission errors, etc.)

- **file:docs/book/src/library-api.md** - Library API Guide
  - Simple API usage: `MagicDatabase::with_builtin_rules()` and `evaluate_file()`
  - Loading custom magic files: `load_from_file()` with examples
  - Builder pattern for advanced configuration with `EvaluationConfig`
  - Configuration presets and their use cases
  - Error handling patterns with `Result` and `LibmagicError`
  - Evaluating files vs buffers (when to use each)
  - Best practices for library usage (resource management, error handling, performance)

- **file:docs/book/src/cli-reference.md** - CLI Reference
  - All CLI flags and arguments documented with descriptions
  - Output formats: text vs JSON with examples
  - Magic file discovery and built-in rules usage
  - Exit codes documentation with meanings
  - Examples for common scenarios (single file, multiple files, stdin, JSON output)

- **file:docs/book/src/migration-guide.md** - Migration Guide from C libmagic
  - Key differences from C libmagic (API design, error handling, configuration approach)
  - API mapping table: C functions → Rust methods (magic_open, magic_load, magic_file, etc.)
  - Configuration migration examples (comparing C magic_set_flags to Rust EvaluationConfig)
  - Error handling differences with examples (C errno vs Rust Result/LibmagicError)
  - Known limitations in Phase 1 (binary .mgc files not supported, specific features deferred)
  - Performance considerations and optimization tips

- **file:docs/book/src/architecture.md** - Architecture Overview
  - OpenBSD-inspired approach explanation and rationale
  - Parser-evaluator pipeline overview with conceptual diagram
  - Module organization (parser, evaluator, io, output, error modules)
  - Key data structures (AST representation, MatchResult, EvaluationConfig)
  - Design decisions and rationale (why certain choices were made)

#### 2.3 Examples Section (Phase 1 MVP)

- **file:docs/book/src/examples.md** - Examples Overview
  - Links to example code in repository
  - Brief descriptions of each example and its use case

- **file:docs/book/src/examples/basic-usage.md** - Basic Usage Examples
  - Simple file type detection with code examples
  - Batch processing multiple files with iteration
  - Processing stdin with error handling

- **file:docs/book/src/examples/advanced-config.md** - Advanced Configuration Examples
  - Custom EvaluationConfig usage with specific options
  - Timeout and resource limit handling with examples
  - MIME type mapping (if available in Phase 1)

- **file:docs/book/src/examples/custom-rules.md** - Custom Magic Rules Examples
  - Writing simple magic rules with syntax explanation
  - Testing custom rules with examples
  - Debugging rule evaluation and troubleshooting

### 3. Rustdoc Examples and Code Samples

#### 3.1 Create Compilable Examples
- **examples/basic_usage.rs** - Simple file identification example demonstrating MagicDatabase usage
- **examples/custom_config.rs** - Configuration options example showing EvaluationConfig usage
- **examples/json_output.rs** - JSON output format example (if applicable in Phase 1)
- **examples/error_handling.rs** - Error handling patterns example with LibmagicError handling

#### 3.2 Ensure Examples Compile and Test
- All examples must compile with `cargo build --examples`
- All rustdoc examples must pass `cargo test --doc`
- Examples should be practical and demonstrate real use cases from the library API guide
- Examples in rustdoc should follow the pattern: use `?` operator, include `Ok::<(), Box<dyn std::error::Error>>(())` for Result types

### 4. Documentation Integration and Publishing

#### 4.1 CI/CD Integration
- **file:.github/workflows/docs.yml** - Create or update workflow to:
  - Build rustdoc with `cargo doc --no-deps` and fail on warnings
  - Build mdbook with `mdbook build docs/book`
  - Run doctests with `cargo test --doc` to verify all examples compile and run
  - Deploy to GitHub Pages (if configured) or publish to docs.rs
  - Fail the workflow on any documentation warnings or build failures
  - Run on push to main and pull requests to catch documentation issues early

#### 4.2 Project Metadata Updates
- **file:Cargo.toml** - Add documentation metadata:
  - `documentation` field pointing to GitHub Pages or docs.rs URL
  - `homepage` field (if applicable)
  - `repository` field (already present)
  - Ensure metadata is accurate for documentation discovery

- **file:README.md** - Add documentation links:
  - Link to mdbook documentation site in prominent location
  - Link to rustdoc on docs.rs or GitHub Pages
  - Quick start section referencing getting started guide
  - Link to migration guide for C libmagic users

### 5. Quality Assurance and Acceptance Criteria

#### 5.1 Rustdoc Quality Checks
- [ ] All public APIs in `file:src/lib.rs` have rustdoc comments
- [ ] All public APIs in `file:src/parser/mod.rs` have rustdoc comments
- [ ] All public APIs in `file:src/evaluator/mod.rs` have rustdoc comments
- [ ] All rustdoc includes: description, arguments, returns, errors, examples
- [ ] All examples compile and pass `cargo test --doc`
- [ ] `cargo doc --no-deps` builds without warnings
- [ ] Consistent terminology and formatting across all rustdoc
- [ ] Rustdoc examples follow the specified pattern (use `?`, include `Ok::<(), Box<dyn std::error::Error>>(())`)

#### 5.2 mdbook Quality Checks
- [ ] mdbook builds successfully with `mdbook build docs/book`
- [ ] All pages render correctly in HTML output
- [ ] Navigation structure is clear and logical (SUMMARY.md structure)
- [ ] Code examples have proper syntax highlighting
- [ ] Internal links between pages work correctly
- [ ] External links are valid and accessible
- [ ] mdbook configuration (book.toml) is correct and complete

#### 5.3 Content Quality Checks
- [ ] Getting started guide covers installation (cargo add, from source) and first use
- [ ] Getting started guide includes quick start with CLI and library API
- [ ] Getting started guide includes troubleshooting section
- [ ] Library API guide covers all major use cases (load_from_file, evaluate_file, evaluate_buffer, with_builtin_rules)
- [ ] Library API guide covers configuration with EvaluationConfig and presets
- [ ] Library API guide covers error handling patterns
- [ ] CLI reference documents all flags and options
- [ ] CLI reference documents output formats (text vs JSON)
- [ ] CLI reference documents exit codes
- [ ] Migration guide addresses C libmagic users with practical examples
- [ ] Migration guide includes API mapping table (C functions → Rust methods)
- [ ] Migration guide documents known Phase 1 limitations
- [ ] Architecture overview explains OpenBSD-inspired approach
- [ ] Architecture overview explains parser-evaluator pipeline
- [ ] Architecture overview documents module organization
- [ ] Examples are practical, tested, and demonstrate real use cases
- [ ] Examples cover basic usage, advanced configuration, and custom rules

#### 5.4 Integration Checks
- [ ] Documentation builds successfully in CI/CD (GitHub Actions)
- [ ] Documentation publishes to GitHub Pages or docs.rs
- [ ] README links to documentation site
- [ ] README links to rustdoc
- [ ] Cargo.toml includes documentation link
- [ ] CI/CD workflow fails on documentation warnings

---

Execution Information

Branch: main
Commit: 50b370c

---

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[traycerai]

I have updated the Implementation Plan to reflect the recent changes in the ticket.

Previous Plan

Observations

The libmagic-rs project already has a solid documentation foundation with mdbook configured, GitHub Actions workflow for deployment, comprehensive rustdoc comments in core modules (file:src/lib.rs, file:src/main.rs, file:src/parser/ast.rs, file:src/error.rs), and many mdbook pages already created in file:docs/src/. The migration guide exists but needs enhancement. The main gaps are: incomplete rustdoc coverage in some modules, missing or incomplete mdbook chapters, and the need for more comprehensive examples and migration scenarios.

Approach

The plan focuses on three parallel tracks: (1) enhancing rustdoc comments across all source modules to ensure comprehensive API documentation, (2) completing all mdbook chapters outlined in file:docs/src/SUMMARY.md with detailed content, and (3) expanding the migration guide with practical examples and common patterns. This approach leverages the existing infrastructure (mdbook configuration, CI/CD workflow) while filling documentation gaps systematically from API-level to user-facing guides.

Implementation Plan

1. Enhance Rustdoc Coverage

1.1 Complete Module-Level Documentation

• Parser Module (file:src/parser/mod.rs, file:src/parser/grammar.rs)

  • Add comprehensive module-level documentation explaining the parsing architecture
  • Document all public functions with examples showing how to parse magic file components
  • Add doctests for parsing numbers, offsets, operators, and values
  • Include examples of error handling during parsing
  • Document the nom parser combinators used and their purpose

• Evaluator Module (file:src/evaluator/mod.rs, file:src/evaluator/offset.rs, file:src/evaluator/operators.rs, file:src/evaluator/types.rs)

  • Add module-level documentation explaining the evaluation engine architecture
  • Document offset resolution strategies (absolute, indirect, relative, from-end)
  • Provide examples of type interpretation with different endianness
  • Document operator evaluation with bitwise operations examples
  • Add safety documentation for bounds checking and buffer access

• I/O Module (file:src/io/mod.rs)

  • Document the FileBuffer implementation and memory-mapped I/O strategy
  • Add examples of safe file access patterns
  • Document error handling for file operations
  • Include performance considerations and best practices
  • Add examples of working with large files efficiently

• Output Module (file:src/output/mod.rs, file:src/output/json.rs, file:src/output/text.rs)

  • Document output formatting strategies
  • Provide examples of both text and JSON output formats
  • Document the MatchResult structure and its fields
  • Add examples of custom output formatting
  • Include serialization examples with serde

1.2 Add Cross-References

• Link related types and functions across modules using rustdoc links
• Reference the mdbook guide from rustdoc comments for detailed explanations
• Add "See also" sections pointing to related functionality
• Link to examples in the examples directory (when created)

1.3 Improve Existing Documentation

• Enhance file:src/lib.rs with more comprehensive library overview
• Add more examples to EvaluationConfig showing different use cases
• Document security considerations in configuration validation
• Add performance tuning examples
• Include troubleshooting tips in documentation

2. Complete mdbook Chapters

2.1 User Guide Chapters (Part I)

• Chapter 1: Getting Started (file:docs/src/getting-started.md)

  • Expand installation instructions for different platforms
  • Add troubleshooting section for common installation issues
  • Include examples of verifying the installation
  • Add quick start examples for both CLI and library usage
  • Document system requirements and dependencies

• Chapter 2: CLI Usage (file:docs/src/cli-usage.md)

  • Document all CLI flags and options with examples
  • Add examples of processing multiple files
  • Include examples of custom magic file usage
  • Document output format options (text vs JSON)
  • Add examples of integrating with shell scripts and pipelines
  • Include performance tips for batch processing

• Chapter 3: Library API (file:docs/src/library-api.md)

  • Provide comprehensive API usage examples
  • Document the MagicDatabase API with real-world scenarios
  • Show examples of custom EvaluationConfig usage
  • Include error handling patterns and best practices
  • Add examples of thread-safe usage patterns
  • Document integration with async Rust applications

• Chapter 4: Configuration (file:docs/src/configuration.md)

  • Document all configuration options in detail
  • Provide examples of performance vs completeness tradeoffs
  • Include security configuration best practices
  • Add examples of custom timeout and resource limits
  • Document environment variable configuration (if applicable)

2.2 Architecture Chapters (Part II)

• Chapter 5: Architecture Overview (file:docs/src/architecture.md)

  • Create detailed architecture diagrams using Mermaid
  • Document the parser-evaluator-formatter pipeline
  • Explain data flow through the system
  • Include component interaction diagrams
  • Document design decisions and rationale

• Chapter 6: AST Data Structures (file:docs/src/ast-structures.md)

  • Document all AST types with examples
  • Explain the relationship between OffsetSpec, TypeKind, Operator, and Value
  • Include serialization examples
  • Add diagrams showing AST structure for complex rules
  • Document validation and constraints

• Chapter 7: Parser Implementation (file:docs/src/parser.md)

  • Document the nom-based parsing strategy
  • Explain parser combinators used
  • Include examples of parsing different magic file constructs
  • Document error recovery strategies
  • Add performance considerations for large magic files

• Chapter 8: Evaluator Engine (file:docs/src/evaluator.md)

  • Document the evaluation algorithm in detail
  • Explain offset resolution strategies
  • Include examples of type interpretation
  • Document operator evaluation logic
  • Add performance optimization techniques

• Chapter 9: Output Formatters (file:docs/src/output.md)

  • Document text and JSON output formats
  • Provide examples of custom formatters
  • Include schema documentation for JSON output
  • Document MIME type mapping (when implemented)
  • Add examples of integrating with other tools

• Chapter 10: I/O and Performance (file:docs/src/io-performance.md)

  • Document memory-mapped I/O implementation
  • Include performance benchmarks and comparisons
  • Add optimization techniques and best practices
  • Document resource usage patterns
  • Include profiling and debugging tips

2.3 Advanced Topics (Part III)

• Chapter 11: Magic File Format (file:docs/src/magic-format.md)

  • Document the magic file DSL syntax comprehensively
  • Include examples of all supported constructs
  • Add reference documentation for offset specifications
  • Document type specifications and operators
  • Include best practices for writing magic files

• Chapter 12: Testing and Quality Assurance (file:docs/src/testing.md)

  • Document the testing strategy and coverage
  • Include examples of unit tests for different components
  • Document integration testing approach
  • Add compatibility testing with GNU file
  • Include fuzzing and property-based testing examples

• Chapter 13: Performance Optimization (file:docs/src/performance.md)

  • Document performance benchmarking methodology
  • Include optimization techniques and patterns
  • Add profiling examples and tools
  • Document memory usage optimization
  • Include comparison with C libmagic

• Chapter 14: Error Handling (file:docs/src/error-handling.md)

  • Document all error types comprehensively
  • Include examples of error handling patterns
  • Add recovery strategies for different error types
  • Document error propagation best practices
  • Include debugging tips for common errors

2.4 Integration & Migration (Part IV)

• Chapter 15: Migration from libmagic (file:docs/src/migration.md)

  • Expand with detailed API comparison tables
  • Add step-by-step migration guide for common scenarios
  • Include code examples showing before/after patterns
  • Document breaking changes and workarounds
  • Add migration checklist and validation steps
  • Include performance comparison and optimization tips
  • Document FFI integration for gradual migration
  • Add examples of wrapping C libmagic during transition

• Chapter 16: Troubleshooting (file:docs/src/troubleshooting.md)

  • Create comprehensive troubleshooting guide
  • Document common issues and solutions
  • Include debugging techniques and tools
  • Add FAQ section for frequent questions
  • Document platform-specific issues
  • Include performance troubleshooting tips

2.5 Development & Contributing (Part V)

• Chapter 17: Development Setup (file:docs/src/development.md)

  • Document development environment setup
  • Include IDE configuration recommendations
  • Add debugging setup and techniques
  • Document development workflow and tools
  • Include contribution guidelines

• Chapter 18: Code Style & Standards (file:docs/src/code-style.md)

  • Document Rust coding standards used
  • Include clippy configuration explanation
  • Add formatting guidelines
  • Document naming conventions
  • Include code review checklist

• Chapter 19: Testing Guidelines (file:docs/src/testing-guidelines.md)

  • Document testing requirements and standards
  • Include test writing guidelines
  • Add coverage requirements
  • Document CI/CD testing pipeline
  • Include examples of good test patterns

• Chapter 20: Release Process (file:docs/src/release-process.md)

  • Document the release workflow
  • Include versioning strategy
  • Add changelog guidelines
  • Document deployment process
  • Include release checklist

2.6 Appendices

• Appendix A: API Reference (file:docs/src/api-reference.md)

  • Create comprehensive API reference linking to rustdoc
  • Include quick reference tables for common types
  • Add index of all public APIs
  • Document stability guarantees

• Appendix B: Command Reference (file:docs/src/cli-reference.md)

  • Complete CLI command reference
  • Document all flags and options
  • Include examples for each command
  • Add exit codes documentation

• Appendix C: Magic File Examples (file:docs/src/magic-examples.md)

  • Provide comprehensive magic file examples
  • Include examples for common file types
  • Add complex rule examples
  • Document best practices and patterns

• Appendix D: Compatibility Matrix (file:docs/src/compatibility.md)

  • Document compatibility with GNU file
  • Include feature comparison matrix
  • Add platform compatibility information
  • Document magic file format compatibility

3. Create Examples Directory

3.1 Basic Examples

• Create examples/basic_usage.rs showing simple file identification
• Create examples/custom_config.rs demonstrating configuration options
• Create examples/json_output.rs showing JSON output formatting
• Create examples/error_handling.rs demonstrating error handling patterns

3.2 Advanced Examples

• Create examples/batch_processing.rs for processing multiple files
• Create examples/custom_magic_rules.rs showing AST construction
• Create examples/async_usage.rs for async integration (if applicable)
• Create examples/performance_tuning.rs demonstrating optimization

3.3 Integration Examples

• Create examples/cli_integration.rs showing CLI tool integration
• Create examples/web_service.rs for web service integration
• Create examples/migration_from_c.rs showing migration patterns

4. Enhance Migration Guide

4.1 Expand API Comparison

• Create detailed comparison tables for all major APIs
• Document parameter mapping between C and Rust APIs
• Include type conversion examples
• Add memory management comparison
• Document thread safety differences

4.2 Add Migration Scenarios

• Scenario 1: Simple CLI Tool Migration

  • Show complete before/after code
  • Document build system changes
  • Include testing strategy

• Scenario 2: Library Integration Migration

  • Show FFI wrapper approach
  • Document gradual migration strategy
  • Include performance validation

• Scenario 3: Web Service Migration

  • Show async integration patterns
  • Document error handling changes
  • Include deployment considerations

4.3 Create Migration Checklist

• Pre-migration assessment checklist
• Step-by-step migration tasks
• Testing and validation checklist
• Performance verification steps
• Rollback procedures

4.4 Add Common Pitfalls Section

• Document common migration mistakes
• Include solutions and workarounds
• Add debugging tips for migration issues
• Document platform-specific considerations

5. Documentation Infrastructure

5.1 Verify CI/CD Pipeline

• Ensure file:.github/workflows/docs.yml builds rustdoc correctly
• Verify mdbook builds all chapters without errors
• Confirm rustdoc is integrated into mdbook output
• Test GitHub Pages deployment
• Add documentation build checks to PR workflow

5.2 Add Documentation Tests

• Enable doctests in CI/CD pipeline
• Add examples that compile and run
• Include negative test cases for error handling
• Verify all code examples in mdbook compile

5.3 Create Documentation Maintenance Guide

• Document how to update documentation
• Include guidelines for keeping docs in sync with code
• Add review checklist for documentation PRs
• Document versioning strategy for documentation

6. Visual Enhancements

6.1 Add Mermaid Diagrams

• Create architecture overview diagram showing parser → evaluator → formatter flow
• Add sequence diagram for file evaluation process
• Create class diagram for AST structures
• Add flowchart for offset resolution logic
• Create state diagram for parser states

6.2 Add Tables

• Create comparison tables for C libmagic vs libmagic-rs
• Add configuration options reference table
• Create error types reference table
• Add supported magic file syntax table

6.3 Add Code Highlighting

• Ensure all code blocks have proper language tags
• Add syntax highlighting for magic file examples
• Include shell command examples with proper formatting

7. Quality Assurance

7.1 Documentation Review

• Review all rustdoc comments for accuracy and completeness
• Verify all mdbook chapters are complete and coherent
• Check all links and cross-references work correctly
• Ensure examples compile and run correctly
• Verify diagrams render properly

7.2 Accessibility

• Ensure proper heading hierarchy in all documents
• Add alt text for diagrams and images
• Verify color contrast in code examples
• Test documentation with screen readers (if applicable)

7.3 Consistency

• Ensure consistent terminology throughout documentation
• Verify consistent code style in examples
• Check consistent formatting across all chapters
• Ensure consistent voice and tone

Import In IDE

🤖 Prompt for AI Agents

## Observations

The libmagic-rs project already has a solid documentation foundation with mdbook configured, GitHub Actions workflow for deployment, comprehensive rustdoc comments in core modules (`file:src/lib.rs`, `file:src/main.rs`, `file:src/parser/ast.rs`, `file:src/error.rs`), and many mdbook pages already created in `file:docs/src/`. The migration guide exists but needs enhancement. The main gaps are: incomplete rustdoc coverage in some modules, missing or incomplete mdbook chapters, and the need for more comprehensive examples and migration scenarios.

## Approach

The plan focuses on three parallel tracks: (1) enhancing rustdoc comments across all source modules to ensure comprehensive API documentation, (2) completing all mdbook chapters outlined in `file:docs/src/SUMMARY.md` with detailed content, and (3) expanding the migration guide with practical examples and common patterns. This approach leverages the existing infrastructure (mdbook configuration, CI/CD workflow) while filling documentation gaps systematically from API-level to user-facing guides.

## Implementation Plan

### 1. Enhance Rustdoc Coverage

#### 1.1 Complete Module-Level Documentation
- **Parser Module** (`file:src/parser/mod.rs`, `file:src/parser/grammar.rs`)
  - Add comprehensive module-level documentation explaining the parsing architecture
  - Document all public functions with examples showing how to parse magic file components
  - Add doctests for parsing numbers, offsets, operators, and values
  - Include examples of error handling during parsing
  - Document the nom parser combinators used and their purpose

- **Evaluator Module** (`file:src/evaluator/mod.rs`, `file:src/evaluator/offset.rs`, `file:src/evaluator/operators.rs`, `file:src/evaluator/types.rs`)
  - Add module-level documentation explaining the evaluation engine architecture
  - Document offset resolution strategies (absolute, indirect, relative, from-end)
  - Provide examples of type interpretation with different endianness
  - Document operator evaluation with bitwise operations examples
  - Add safety documentation for bounds checking and buffer access

- **I/O Module** (`file:src/io/mod.rs`)
  - Document the FileBuffer implementation and memory-mapped I/O strategy
  - Add examples of safe file access patterns
  - Document error handling for file operations
  - Include performance considerations and best practices
  - Add examples of working with large files efficiently

- **Output Module** (`file:src/output/mod.rs`, `file:src/output/json.rs`, `file:src/output/text.rs`)
  - Document output formatting strategies
  - Provide examples of both text and JSON output formats
  - Document the MatchResult structure and its fields
  - Add examples of custom output formatting
  - Include serialization examples with serde

#### 1.2 Add Cross-References
- Link related types and functions across modules using rustdoc links
- Reference the mdbook guide from rustdoc comments for detailed explanations
- Add "See also" sections pointing to related functionality
- Link to examples in the examples directory (when created)

#### 1.3 Improve Existing Documentation
- Enhance `file:src/lib.rs` with more comprehensive library overview
- Add more examples to `EvaluationConfig` showing different use cases
- Document security considerations in configuration validation
- Add performance tuning examples
- Include troubleshooting tips in documentation

### 2. Complete mdbook Chapters

#### 2.1 User Guide Chapters (Part I)

- **Chapter 1: Getting Started** (`file:docs/src/getting-started.md`)
  - Expand installation instructions for different platforms
  - Add troubleshooting section for common installation issues
  - Include examples of verifying the installation
  - Add quick start examples for both CLI and library usage
  - Document system requirements and dependencies

- **Chapter 2: CLI Usage** (`file:docs/src/cli-usage.md`)
  - Document all CLI flags and options with examples
  - Add examples of processing multiple files
  - Include examples of custom magic file usage
  - Document output format options (text vs JSON)
  - Add examples of integrating with shell scripts and pipelines
  - Include performance tips for batch processing

- **Chapter 3: Library API** (`file:docs/src/library-api.md`)
  - Provide comprehensive API usage examples
  - Document the MagicDatabase API with real-world scenarios
  - Show examples of custom EvaluationConfig usage
  - Include error handling patterns and best practices
  - Add examples of thread-safe usage patterns
  - Document integration with async Rust applications

- **Chapter 4: Configuration** (`file:docs/src/configuration.md`)
  - Document all configuration options in detail
  - Provide examples of performance vs completeness tradeoffs
  - Include security configuration best practices
  - Add examples of custom timeout and resource limits
  - Document environment variable configuration (if applicable)

#### 2.2 Architecture Chapters (Part II)

- **Chapter 5: Architecture Overview** (`file:docs/src/architecture.md`)
  - Create detailed architecture diagrams using Mermaid
  - Document the parser-evaluator-formatter pipeline
  - Explain data flow through the system
  - Include component interaction diagrams
  - Document design decisions and rationale

- **Chapter 6: AST Data Structures** (`file:docs/src/ast-structures.md`)
  - Document all AST types with examples
  - Explain the relationship between OffsetSpec, TypeKind, Operator, and Value
  - Include serialization examples
  - Add diagrams showing AST structure for complex rules
  - Document validation and constraints

- **Chapter 7: Parser Implementation** (`file:docs/src/parser.md`)
  - Document the nom-based parsing strategy
  - Explain parser combinators used
  - Include examples of parsing different magic file constructs
  - Document error recovery strategies
  - Add performance considerations for large magic files

- **Chapter 8: Evaluator Engine** (`file:docs/src/evaluator.md`)
  - Document the evaluation algorithm in detail
  - Explain offset resolution strategies
  - Include examples of type interpretation
  - Document operator evaluation logic
  - Add performance optimization techniques

- **Chapter 9: Output Formatters** (`file:docs/src/output.md`)
  - Document text and JSON output formats
  - Provide examples of custom formatters
  - Include schema documentation for JSON output
  - Document MIME type mapping (when implemented)
  - Add examples of integrating with other tools

- **Chapter 10: I/O and Performance** (`file:docs/src/io-performance.md`)
  - Document memory-mapped I/O implementation
  - Include performance benchmarks and comparisons
  - Add optimization techniques and best practices
  - Document resource usage patterns
  - Include profiling and debugging tips

#### 2.3 Advanced Topics (Part III)

- **Chapter 11: Magic File Format** (`file:docs/src/magic-format.md`)
  - Document the magic file DSL syntax comprehensively
  - Include examples of all supported constructs
  - Add reference documentation for offset specifications
  - Document type specifications and operators
  - Include best practices for writing magic files

- **Chapter 12: Testing and Quality Assurance** (`file:docs/src/testing.md`)
  - Document the testing strategy and coverage
  - Include examples of unit tests for different components
  - Document integration testing approach
  - Add compatibility testing with GNU file
  - Include fuzzing and property-based testing examples

- **Chapter 13: Performance Optimization** (`file:docs/src/performance.md`)
  - Document performance benchmarking methodology
  - Include optimization techniques and patterns
  - Add profiling examples and tools
  - Document memory usage optimization
  - Include comparison with C libmagic

- **Chapter 14: Error Handling** (`file:docs/src/error-handling.md`)
  - Document all error types comprehensively
  - Include examples of error handling patterns
  - Add recovery strategies for different error types
  - Document error propagation best practices
  - Include debugging tips for common errors

#### 2.4 Integration & Migration (Part IV)

- **Chapter 15: Migration from libmagic** (`file:docs/src/migration.md`)
  - Expand with detailed API comparison tables
  - Add step-by-step migration guide for common scenarios
  - Include code examples showing before/after patterns
  - Document breaking changes and workarounds
  - Add migration checklist and validation steps
  - Include performance comparison and optimization tips
  - Document FFI integration for gradual migration
  - Add examples of wrapping C libmagic during transition

- **Chapter 16: Troubleshooting** (`file:docs/src/troubleshooting.md`)
  - Create comprehensive troubleshooting guide
  - Document common issues and solutions
  - Include debugging techniques and tools
  - Add FAQ section for frequent questions
  - Document platform-specific issues
  - Include performance troubleshooting tips

#### 2.5 Development & Contributing (Part V)

- **Chapter 17: Development Setup** (`file:docs/src/development.md`)
  - Document development environment setup
  - Include IDE configuration recommendations
  - Add debugging setup and techniques
  - Document development workflow and tools
  - Include contribution guidelines

- **Chapter 18: Code Style & Standards** (`file:docs/src/code-style.md`)
  - Document Rust coding standards used
  - Include clippy configuration explanation
  - Add formatting guidelines
  - Document naming conventions
  - Include code review checklist

- **Chapter 19: Testing Guidelines** (`file:docs/src/testing-guidelines.md`)
  - Document testing requirements and standards
  - Include test writing guidelines
  - Add coverage requirements
  - Document CI/CD testing pipeline
  - Include examples of good test patterns

- **Chapter 20: Release Process** (`file:docs/src/release-process.md`)
  - Document the release workflow
  - Include versioning strategy
  - Add changelog guidelines
  - Document deployment process
  - Include release checklist

#### 2.6 Appendices

- **Appendix A: API Reference** (`file:docs/src/api-reference.md`)
  - Create comprehensive API reference linking to rustdoc
  - Include quick reference tables for common types
  - Add index of all public APIs
  - Document stability guarantees

- **Appendix B: Command Reference** (`file:docs/src/cli-reference.md`)
  - Complete CLI command reference
  - Document all flags and options
  - Include examples for each command
  - Add exit codes documentation

- **Appendix C: Magic File Examples** (`file:docs/src/magic-examples.md`)
  - Provide comprehensive magic file examples
  - Include examples for common file types
  - Add complex rule examples
  - Document best practices and patterns

- **Appendix D: Compatibility Matrix** (`file:docs/src/compatibility.md`)
  - Document compatibility with GNU file
  - Include feature comparison matrix
  - Add platform compatibility information
  - Document magic file format compatibility

### 3. Create Examples Directory

#### 3.1 Basic Examples
- Create `examples/basic_usage.rs` showing simple file identification
- Create `examples/custom_config.rs` demonstrating configuration options
- Create `examples/json_output.rs` showing JSON output formatting
- Create `examples/error_handling.rs` demonstrating error handling patterns

#### 3.2 Advanced Examples
- Create `examples/batch_processing.rs` for processing multiple files
- Create `examples/custom_magic_rules.rs` showing AST construction
- Create `examples/async_usage.rs` for async integration (if applicable)
- Create `examples/performance_tuning.rs` demonstrating optimization

#### 3.3 Integration Examples
- Create `examples/cli_integration.rs` showing CLI tool integration
- Create `examples/web_service.rs` for web service integration
- Create `examples/migration_from_c.rs` showing migration patterns

### 4. Enhance Migration Guide

#### 4.1 Expand API Comparison
- Create detailed comparison tables for all major APIs
- Document parameter mapping between C and Rust APIs
- Include type conversion examples
- Add memory management comparison
- Document thread safety differences

#### 4.2 Add Migration Scenarios
- **Scenario 1: Simple CLI Tool Migration**
  - Show complete before/after code
  - Document build system changes
  - Include testing strategy
  
- **Scenario 2: Library Integration Migration**
  - Show FFI wrapper approach
  - Document gradual migration strategy
  - Include performance validation

- **Scenario 3: Web Service Migration**
  - Show async integration patterns
  - Document error handling changes
  - Include deployment considerations

#### 4.3 Create Migration Checklist
- Pre-migration assessment checklist
- Step-by-step migration tasks
- Testing and validation checklist
- Performance verification steps
- Rollback procedures

#### 4.4 Add Common Pitfalls Section
- Document common migration mistakes
- Include solutions and workarounds
- Add debugging tips for migration issues
- Document platform-specific considerations

### 5. Documentation Infrastructure

#### 5.1 Verify CI/CD Pipeline
- Ensure `file:.github/workflows/docs.yml` builds rustdoc correctly
- Verify mdbook builds all chapters without errors
- Confirm rustdoc is integrated into mdbook output
- Test GitHub Pages deployment
- Add documentation build checks to PR workflow

#### 5.2 Add Documentation Tests
- Enable doctests in CI/CD pipeline
- Add examples that compile and run
- Include negative test cases for error handling
- Verify all code examples in mdbook compile

#### 5.3 Create Documentation Maintenance Guide
- Document how to update documentation
- Include guidelines for keeping docs in sync with code
- Add review checklist for documentation PRs
- Document versioning strategy for documentation

### 6. Visual Enhancements

#### 6.1 Add Mermaid Diagrams
- Create architecture overview diagram showing parser → evaluator → formatter flow
- Add sequence diagram for file evaluation process
- Create class diagram for AST structures
- Add flowchart for offset resolution logic
- Create state diagram for parser states

#### 6.2 Add Tables
- Create comparison tables for C libmagic vs libmagic-rs
- Add configuration options reference table
- Create error types reference table
- Add supported magic file syntax table

#### 6.3 Add Code Highlighting
- Ensure all code blocks have proper language tags
- Add syntax highlighting for magic file examples
- Include shell command examples with proper formatting

### 7. Quality Assurance

#### 7.1 Documentation Review
- Review all rustdoc comments for accuracy and completeness
- Verify all mdbook chapters are complete and coherent
- Check all links and cross-references work correctly
- Ensure examples compile and run correctly
- Verify diagrams render properly

#### 7.2 Accessibility
- Ensure proper heading hierarchy in all documents
- Add alt text for diagrams and images
- Verify color contrast in code examples
- Test documentation with screen readers (if applicable)

#### 7.3 Consistency
- Ensure consistent terminology throughout documentation
- Verify consistent code style in examples
- Check consistent formatting across all chapters
- Ensure consistent voice and tone

---

Execution Information

Branch: main
Commit: 50b370c

New Plan

Observations

The libmagic-rs project has foundational documentation infrastructure in place with mdbook configuration and GitHub Actions workflow. The ticket defines a Phase 1 MVP scope focused on "ready for early adopters" with specific deliverables: rustdoc for all public APIs, mdbook site with core guides, and migration information. The scope explicitly excludes advanced tutorials, video tutorials, extended API reference, and performance tuning guides—these are deferred to Phase 2 and Phase 3. The main task is to deliver focused, high-quality documentation for the MVP release rather than comprehensive documentation across all possible topics.

Approach

The plan focuses on delivering Phase 1 MVP documentation with three core tracks: (1) comprehensive rustdoc for all public APIs with examples that compile and run, (2) focused mdbook site with essential guides (getting started, library API, CLI reference, migration, architecture), and (3) practical examples for common use cases. This approach prioritizes quality and completeness within the defined scope while deferring advanced content to later phases. The documentation will be integrated into CI/CD and published to GitHub Pages.

Implementation Plan

1. Rustdoc for Public APIs (Phase 1 MVP Scope)

1.1 Core Public API Documentation

• file:src/lib.rs - Primary Public APIs

  • MagicDatabase struct: comprehensive documentation with examples for load_from_file(), evaluate_file(), evaluate_buffer(), and with_builtin_rules()
  • EvaluationConfig struct: document all configuration options with examples showing presets and custom configurations
  • EvaluationResult and EvaluationMetadata structs: document all fields and their meanings
  • MatchResult struct: document match details, confidence, and metadata
  • All error types (LibmagicError variants): document each error case with examples of when it occurs
  • Module-level documentation explaining the library's purpose and basic usage patterns

• file:src/parser/mod.rs - Parser Public API

  • load_magic_file() function: document with examples for loading text files and directories
  • Document format detection (text file vs directory vs binary .mgc)
  • Include error handling examples for unsupported formats
  • Add examples showing successful parsing of standard magic files

• file:src/evaluator/mod.rs - Evaluator Public API

  • Public evaluation functions: document with examples
  • Configuration impact on evaluation: document how EvaluationConfig affects results
  • Error handling during evaluation: document timeout and resource limit errors

1.2 Rustdoc Quality Standards

• All public APIs must have rustdoc comments with:
  • Clear description of purpose and behavior
  • Arguments section documenting all parameters
  • Returns section documenting return values
  • Errors section documenting all error cases
  • Examples section with at least one working example
  • All examples must compile and pass cargo test --doc
• Use consistent formatting and terminology across all rustdoc
• Link related types and functions using rustdoc links ([Type], [function()])

2. mdbook Documentation Site (Phase 1 MVP Scope)

2.1 mdbook Configuration and Structure

• file:docs/book/book.toml - Create mdbook configuration with:

  • Title: "libmagic-rs Documentation"
  • Authors: "libmagic-rs Contributors"
  • Language: "en"
  • Build output directory
  • HTML theme configuration
  • Git repository URL for edit links

• file:docs/book/src/SUMMARY.md - Create table of contents with:

  • Introduction
  • Getting Started
  • Library API Guide
  • CLI Reference
  • Migration Guide
  • Architecture Overview
  • Examples section

2.2 Core Documentation Chapters (Phase 1 MVP)

• file:docs/book/src/introduction.md - Introduction

  • Brief overview of libmagic-rs
  • Key features and benefits
  • Links to getting started and main guides

• file:docs/book/src/getting-started.md - Getting Started Guide

  • Installation instructions (cargo add, from source)
  • Quick start with CLI (basic file identification)
  • Quick start with library API (simple example)
  • Common use cases overview
  • Troubleshooting section for common issues

• file:docs/book/src/library-api.md - Library API Guide

  • Simple API usage: MagicDatabase::with_builtin_rules() and evaluate_file()
  • Loading custom magic files: load_from_file()
  • Configuration with EvaluationConfig and presets
  • Error handling patterns with Result and LibmagicError
  • Evaluating files vs buffers
  • Best practices for library usage

• file:docs/book/src/cli-reference.md - CLI Reference

  • All CLI flags and arguments documented
  • Output formats: text vs JSON
  • Magic file discovery and built-in rules usage
  • Exit codes documentation
  • Examples for common scenarios (single file, multiple files, stdin)

• file:docs/book/src/migration-guide.md - Migration Guide from C libmagic

  • Key differences from C libmagic (API, error handling, configuration)
  • API mapping table: C functions → Rust methods
  • Configuration migration examples
  • Error handling differences with examples
  • Known limitations in Phase 1 (binary .mgc files, etc.)
  • Performance considerations

• file:docs/book/src/architecture.md - Architecture Overview

  • OpenBSD-inspired approach explanation
  • Parser-evaluator pipeline overview with diagram
  • Module organization (parser, evaluator, io, output, error)
  • Key data structures (AST, MatchResult, EvaluationConfig)
  • Design decisions and rationale

2.3 Examples Section (Phase 1 MVP)

• file:docs/book/src/examples.md - Examples Overview

  • Links to example code in repository
  • Brief descriptions of each example

• file:docs/book/src/examples/basic-usage.md - Basic Usage Examples

  • Simple file type detection
  • Batch processing multiple files
  • Processing stdin

• file:docs/book/src/examples/advanced-config.md - Advanced Configuration Examples

  • Custom EvaluationConfig usage
  • Timeout and resource limit handling
  • MIME type mapping (if available in Phase 1)

• file:docs/book/src/examples/custom-rules.md - Custom Magic Rules Examples

  • Writing simple magic rules
  • Testing custom rules
  • Debugging rule evaluation

3. Rustdoc Examples and Code Samples

3.1 Create Compilable Examples

• examples/basic_usage.rs - Simple file identification example
• examples/custom_config.rs - Configuration options example
• examples/json_output.rs - JSON output format example
• examples/error_handling.rs - Error handling patterns example

3.2 Ensure Examples Compile

• All examples must compile with cargo build --examples
• All rustdoc examples must pass cargo test --doc
• Examples should be practical and demonstrate real use cases

4. Documentation Integration and Publishing

4.1 CI/CD Integration

• file:.github/workflows/docs.yml - Create or update workflow to:
  • Build rustdoc with cargo doc --no-deps
  • Build mdbook with mdbook build docs/book
  • Run doctests with cargo test --doc
  • Deploy to GitHub Pages (if configured)
  • Fail on documentation warnings

4.2 Project Metadata Updates

• file:Cargo.toml - Add documentation metadata:

  • documentation field pointing to docs.rs or GitHub Pages
  • homepage field (if applicable)
  • repository field (already present)

• file:README.md - Add documentation links:

  • Link to mdbook documentation site
  • Link to rustdoc on docs.rs
  • Quick start section referencing getting started guide

5. Quality Assurance and Acceptance Criteria

5.1 Rustdoc Quality Checks

• All public APIs in file:src/lib.rs have rustdoc comments
• All rustdoc includes: description, arguments, returns, errors, examples
• All examples compile and pass cargo test --doc
• cargo doc builds without warnings
• Consistent terminology and formatting across all rustdoc

5.2 mdbook Quality Checks

• mdbook builds successfully with mdbook build docs/book
• All pages render correctly in HTML output
• Navigation structure is clear and logical
• Code examples have proper syntax highlighting
• Internal links between pages work correctly
• External links are valid and accessible

5.3 Content Quality Checks

• Getting started guide covers installation and first use
• Library API guide covers all major use cases from ticket scope
• CLI reference documents all flags and options
• Migration guide addresses C libmagic users with practical examples
• Architecture overview explains design decisions
• Examples are practical, tested, and demonstrate real use cases

5.4 Integration Checks

• Documentation builds successfully in CI/CD
• Documentation publishes to GitHub Pages or docs.rs
• README links to documentation
• Cargo.toml includes documentation link

Import In IDE

🤖 Prompt for AI Agents

## Observations

The libmagic-rs project has foundational documentation infrastructure in place with mdbook configuration and GitHub Actions workflow. The ticket defines a Phase 1 MVP scope focused on "ready for early adopters" with specific deliverables: rustdoc for all public APIs, mdbook site with core guides, and migration information. The scope explicitly excludes advanced tutorials, video tutorials, extended API reference, and performance tuning guides—these are deferred to Phase 2 and Phase 3. The main task is to deliver focused, high-quality documentation for the MVP release rather than comprehensive documentation across all possible topics.

## Approach

The plan focuses on delivering Phase 1 MVP documentation with three core tracks: (1) comprehensive rustdoc for all public APIs with examples that compile and run, (2) focused mdbook site with essential guides (getting started, library API, CLI reference, migration, architecture), and (3) practical examples for common use cases. This approach prioritizes quality and completeness within the defined scope while deferring advanced content to later phases. The documentation will be integrated into CI/CD and published to GitHub Pages.

## Implementation Plan

### 1. Rustdoc for Public APIs (Phase 1 MVP Scope)

#### 1.1 Core Public API Documentation
- **file:src/lib.rs - Primary Public APIs**
  - `MagicDatabase` struct: comprehensive documentation with examples for `load_from_file()`, `evaluate_file()`, `evaluate_buffer()`, and `with_builtin_rules()`
  - `EvaluationConfig` struct: document all configuration options with examples showing presets and custom configurations
  - `EvaluationResult` and `EvaluationMetadata` structs: document all fields and their meanings
  - `MatchResult` struct: document match details, confidence, and metadata
  - All error types (`LibmagicError` variants): document each error case with examples of when it occurs
  - Module-level documentation explaining the library's purpose and basic usage patterns

- **file:src/parser/mod.rs - Parser Public API**
  - `load_magic_file()` function: document with examples for loading text files and directories
  - Document format detection (text file vs directory vs binary .mgc)
  - Include error handling examples for unsupported formats
  - Add examples showing successful parsing of standard magic files

- **file:src/evaluator/mod.rs - Evaluator Public API**
  - Public evaluation functions: document with examples
  - Configuration impact on evaluation: document how EvaluationConfig affects results
  - Error handling during evaluation: document timeout and resource limit errors

#### 1.2 Rustdoc Quality Standards
- All public APIs must have rustdoc comments with:
  - Clear description of purpose and behavior
  - Arguments section documenting all parameters
  - Returns section documenting return values
  - Errors section documenting all error cases
  - Examples section with at least one working example
  - All examples must compile and pass `cargo test --doc`
- Use consistent formatting and terminology across all rustdoc
- Link related types and functions using rustdoc links (`[Type]`, `[function()]`)

### 2. mdbook Documentation Site (Phase 1 MVP Scope)

#### 2.1 mdbook Configuration and Structure
- **file:docs/book/book.toml** - Create mdbook configuration with:
  - Title: "libmagic-rs Documentation"
  - Authors: "libmagic-rs Contributors"
  - Language: "en"
  - Build output directory
  - HTML theme configuration
  - Git repository URL for edit links

- **file:docs/book/src/SUMMARY.md** - Create table of contents with:
  - Introduction
  - Getting Started
  - Library API Guide
  - CLI Reference
  - Migration Guide
  - Architecture Overview
  - Examples section

#### 2.2 Core Documentation Chapters (Phase 1 MVP)

- **file:docs/book/src/introduction.md** - Introduction
  - Brief overview of libmagic-rs
  - Key features and benefits
  - Links to getting started and main guides

- **file:docs/book/src/getting-started.md** - Getting Started Guide
  - Installation instructions (cargo add, from source)
  - Quick start with CLI (basic file identification)
  - Quick start with library API (simple example)
  - Common use cases overview
  - Troubleshooting section for common issues

- **file:docs/book/src/library-api.md** - Library API Guide
  - Simple API usage: `MagicDatabase::with_builtin_rules()` and `evaluate_file()`
  - Loading custom magic files: `load_from_file()`
  - Configuration with `EvaluationConfig` and presets
  - Error handling patterns with `Result` and `LibmagicError`
  - Evaluating files vs buffers
  - Best practices for library usage

- **file:docs/book/src/cli-reference.md** - CLI Reference
  - All CLI flags and arguments documented
  - Output formats: text vs JSON
  - Magic file discovery and built-in rules usage
  - Exit codes documentation
  - Examples for common scenarios (single file, multiple files, stdin)

- **file:docs/book/src/migration-guide.md** - Migration Guide from C libmagic
  - Key differences from C libmagic (API, error handling, configuration)
  - API mapping table: C functions → Rust methods
  - Configuration migration examples
  - Error handling differences with examples
  - Known limitations in Phase 1 (binary .mgc files, etc.)
  - Performance considerations

- **file:docs/book/src/architecture.md** - Architecture Overview
  - OpenBSD-inspired approach explanation
  - Parser-evaluator pipeline overview with diagram
  - Module organization (parser, evaluator, io, output, error)
  - Key data structures (AST, MatchResult, EvaluationConfig)
  - Design decisions and rationale

#### 2.3 Examples Section (Phase 1 MVP)

- **file:docs/book/src/examples.md** - Examples Overview
  - Links to example code in repository
  - Brief descriptions of each example

- **file:docs/book/src/examples/basic-usage.md** - Basic Usage Examples
  - Simple file type detection
  - Batch processing multiple files
  - Processing stdin

- **file:docs/book/src/examples/advanced-config.md** - Advanced Configuration Examples
  - Custom EvaluationConfig usage
  - Timeout and resource limit handling
  - MIME type mapping (if available in Phase 1)

- **file:docs/book/src/examples/custom-rules.md** - Custom Magic Rules Examples
  - Writing simple magic rules
  - Testing custom rules
  - Debugging rule evaluation

### 3. Rustdoc Examples and Code Samples

#### 3.1 Create Compilable Examples
- **examples/basic_usage.rs** - Simple file identification example
- **examples/custom_config.rs** - Configuration options example
- **examples/json_output.rs** - JSON output format example
- **examples/error_handling.rs** - Error handling patterns example

#### 3.2 Ensure Examples Compile
- All examples must compile with `cargo build --examples`
- All rustdoc examples must pass `cargo test --doc`
- Examples should be practical and demonstrate real use cases

### 4. Documentation Integration and Publishing

#### 4.1 CI/CD Integration
- **file:.github/workflows/docs.yml** - Create or update workflow to:
  - Build rustdoc with `cargo doc --no-deps`
  - Build mdbook with `mdbook build docs/book`
  - Run doctests with `cargo test --doc`
  - Deploy to GitHub Pages (if configured)
  - Fail on documentation warnings

#### 4.2 Project Metadata Updates
- **file:Cargo.toml** - Add documentation metadata:
  - `documentation` field pointing to docs.rs or GitHub Pages
  - `homepage` field (if applicable)
  - `repository` field (already present)

- **file:README.md** - Add documentation links:
  - Link to mdbook documentation site
  - Link to rustdoc on docs.rs
  - Quick start section referencing getting started guide

### 5. Quality Assurance and Acceptance Criteria

#### 5.1 Rustdoc Quality Checks
- All public APIs in `file:src/lib.rs` have rustdoc comments
- All rustdoc includes: description, arguments, returns, errors, examples
- All examples compile and pass `cargo test --doc`
- `cargo doc` builds without warnings
- Consistent terminology and formatting across all rustdoc

#### 5.2 mdbook Quality Checks
- mdbook builds successfully with `mdbook build docs/book`
- All pages render correctly in HTML output
- Navigation structure is clear and logical
- Code examples have proper syntax highlighting
- Internal links between pages work correctly
- External links are valid and accessible

#### 5.3 Content Quality Checks
- Getting started guide covers installation and first use
- Library API guide covers all major use cases from ticket scope
- CLI reference documents all flags and options
- Migration guide addresses C libmagic users with practical examples
- Architecture overview explains design decisions
- Examples are practical, tested, and demonstrate real use cases

#### 5.4 Integration Checks
- Documentation builds successfully in CI/CD
- Documentation publishes to GitHub Pages or docs.rs
- README links to documentation
- Cargo.toml includes documentation link

---

Execution Information

Branch: main
Commit: 50b370c

[unclesp1d3r]

@coderabbitai Assign the proper labels and other metadata to this issue

[coderabbitai]

🧩 Analysis chain

@unclesp1d3r, I'll check the available labels in the repository and assign appropriate metadata to this issue.

---

🏁 Script executed:

#!/bin/bash

# Get the list of available labels in the repository
echo "=== Available Labels ==="
gh label list --repo EvilBit-Labs/libmagic-rs --limit 100

echo -e "\n=== Current Issue Details ==="
gh issue view 23 --repo EvilBit-Labs/libmagic-rs --json labels,assignees,milestone,projectItems

echo -e "\n=== Available Milestones ==="
gh api repos/EvilBit-Labs/libmagic-rs/milestones --jq '.[] | "\(.number): \(.title)"'

Length of output: 1183

---

🏁 Script executed:

#!/bin/bash

# Add appropriate labels to the issue
gh issue edit 23 --repo EvilBit-Labs/libmagic-rs \
  --add-label "documentation" \
  --add-label "enhancement"

# Set the milestone
gh issue edit 23 --repo EvilBit-Labs/libmagic-rs \
  --milestone "Phase 1 MVP"

# Assign the issue to unclesp1d3r
gh issue edit 23 --repo EvilBit-Labs/libmagic-rs \
  --add-assignee "unclesp1d3r"

echo "=== Updated Issue Details ==="
gh issue view 23 --repo EvilBit-Labs/libmagic-rs --json labels,assignees,milestone --jq '{labels: [.labels[].name], assignees: [.assignees[].login], milestone: .milestone.title}'

Length of output: 288

---

@unclesp1d3r, I've successfully updated issue #23 with the appropriate metadata:

Labels assigned:

• documentation - Primary focus on documentation improvements
• enhancement - Adding new documentation features

Milestone assigned:

• Phase 1 MVP - Aligns with the issue's Phase 1 scope

Assignee:

• unclesp1d3r - Assigned to you

The issue is now properly categorized and ready for work! 🎯

[traycerai]

I have updated the Implementation Plan to reflect the recent changes in the ticket.

Previous Plan

Observations

The libmagic-rs project has foundational documentation infrastructure in place with mdbook configuration and GitHub Actions workflow. The ticket defines a Phase 1 MVP scope focused on "ready for early adopters" with specific deliverables: rustdoc for all public APIs, mdbook site with core guides, and migration information. The scope explicitly excludes advanced tutorials, video tutorials, extended API reference, and performance tuning guides—these are deferred to Phase 2 and Phase 3. The main task is to deliver focused, high-quality documentation for the MVP release rather than comprehensive documentation across all possible topics.

Approach

The plan focuses on delivering Phase 1 MVP documentation with three core tracks: (1) comprehensive rustdoc for all public APIs with examples that compile and run, (2) focused mdbook site with essential guides (getting started, library API, CLI reference, migration, architecture), and (3) practical examples for common use cases. This approach prioritizes quality and completeness within the defined scope while deferring advanced content to later phases. The documentation will be integrated into CI/CD and published to GitHub Pages.

Implementation Plan

1. Rustdoc for Public APIs (Phase 1 MVP Scope)

1.1 Core Public API Documentation

• file:src/lib.rs - Primary Public APIs

  • MagicDatabase struct: comprehensive documentation with examples for load_from_file(), evaluate_file(), evaluate_buffer(), and with_builtin_rules()
  • EvaluationConfig struct: document all configuration options with examples showing presets and custom configurations
  • EvaluationResult and EvaluationMetadata structs: document all fields and their meanings
  • MatchResult struct: document match details, confidence, and metadata
  • All error types (LibmagicError variants): document each error case with examples of when it occurs
  • Module-level documentation explaining the library's purpose and basic usage patterns

• file:src/parser/mod.rs - Parser Public API

  • load_magic_file() function: document with examples for loading text files and directories
  • Document format detection (text file vs directory vs binary .mgc)
  • Include error handling examples for unsupported formats
  • Add examples showing successful parsing of standard magic files

• file:src/evaluator/mod.rs - Evaluator Public API

  • Public evaluation functions: document with examples
  • Configuration impact on evaluation: document how EvaluationConfig affects results
  • Error handling during evaluation: document timeout and resource limit errors

1.2 Rustdoc Quality Standards

• All public APIs must have rustdoc comments with:
  • Clear description of purpose and behavior
  • Arguments section documenting all parameters
  • Returns section documenting return values
  • Errors section documenting all error cases
  • Examples section with at least one working example
  • All examples must compile and pass cargo test --doc
• Use consistent formatting and terminology across all rustdoc
• Link related types and functions using rustdoc links ([Type], [function()])

2. mdbook Documentation Site (Phase 1 MVP Scope)

2.1 mdbook Configuration and Structure

• file:docs/book/book.toml - Create mdbook configuration with:

  • Title: "libmagic-rs Documentation"
  • Authors: "libmagic-rs Contributors"
  • Language: "en"
  • Build output directory
  • HTML theme configuration
  • Git repository URL for edit links

• file:docs/book/src/SUMMARY.md - Create table of contents with:

  • Introduction
  • Getting Started
  • Library API Guide
  • CLI Reference
  • Migration Guide
  • Architecture Overview
  • Examples section

2.2 Core Documentation Chapters (Phase 1 MVP)

• file:docs/book/src/introduction.md - Introduction

  • Brief overview of libmagic-rs
  • Key features and benefits
  • Links to getting started and main guides

• file:docs/book/src/getting-started.md - Getting Started Guide

  • Installation instructions (cargo add, from source)
  • Quick start with CLI (basic file identification)
  • Quick start with library API (simple example)
  • Common use cases overview
  • Troubleshooting section for common issues

• file:docs/book/src/library-api.md - Library API Guide

  • Simple API usage: MagicDatabase::with_builtin_rules() and evaluate_file()
  • Loading custom magic files: load_from_file()
  • Configuration with EvaluationConfig and presets
  • Error handling patterns with Result and LibmagicError
  • Evaluating files vs buffers
  • Best practices for library usage

• file:docs/book/src/cli-reference.md - CLI Reference

  • All CLI flags and arguments documented
  • Output formats: text vs JSON
  • Magic file discovery and built-in rules usage
  • Exit codes documentation
  • Examples for common scenarios (single file, multiple files, stdin)

• file:docs/book/src/migration-guide.md - Migration Guide from C libmagic

  • Key differences from C libmagic (API, error handling, configuration)
  • API mapping table: C functions → Rust methods
  • Configuration migration examples
  • Error handling differences with examples
  • Known limitations in Phase 1 (binary .mgc files, etc.)
  • Performance considerations

• file:docs/book/src/architecture.md - Architecture Overview

  • OpenBSD-inspired approach explanation
  • Parser-evaluator pipeline overview with diagram
  • Module organization (parser, evaluator, io, output, error)
  • Key data structures (AST, MatchResult, EvaluationConfig)
  • Design decisions and rationale

2.3 Examples Section (Phase 1 MVP)

• file:docs/book/src/examples.md - Examples Overview

  • Links to example code in repository
  • Brief descriptions of each example

• file:docs/book/src/examples/basic-usage.md - Basic Usage Examples

  • Simple file type detection
  • Batch processing multiple files
  • Processing stdin

• file:docs/book/src/examples/advanced-config.md - Advanced Configuration Examples

  • Custom EvaluationConfig usage
  • Timeout and resource limit handling
  • MIME type mapping (if available in Phase 1)

• file:docs/book/src/examples/custom-rules.md - Custom Magic Rules Examples

  • Writing simple magic rules
  • Testing custom rules
  • Debugging rule evaluation

3. Rustdoc Examples and Code Samples

3.1 Create Compilable Examples

• examples/basic_usage.rs - Simple file identification example
• examples/custom_config.rs - Configuration options example
• examples/json_output.rs - JSON output format example
• examples/error_handling.rs - Error handling patterns example

3.2 Ensure Examples Compile

• All examples must compile with cargo build --examples
• All rustdoc examples must pass cargo test --doc
• Examples should be practical and demonstrate real use cases

4. Documentation Integration and Publishing

4.1 CI/CD Integration

• file:.github/workflows/docs.yml - Create or update workflow to:
  • Build rustdoc with cargo doc --no-deps
  • Build mdbook with mdbook build docs/book
  • Run doctests with cargo test --doc
  • Deploy to GitHub Pages (if configured)
  • Fail on documentation warnings

4.2 Project Metadata Updates

• file:Cargo.toml - Add documentation metadata:

  • documentation field pointing to docs.rs or GitHub Pages
  • homepage field (if applicable)
  • repository field (already present)

• file:README.md - Add documentation links:

  • Link to mdbook documentation site
  • Link to rustdoc on docs.rs
  • Quick start section referencing getting started guide

5. Quality Assurance and Acceptance Criteria

5.1 Rustdoc Quality Checks

• All public APIs in file:src/lib.rs have rustdoc comments
• All rustdoc includes: description, arguments, returns, errors, examples
• All examples compile and pass cargo test --doc
• cargo doc builds without warnings
• Consistent terminology and formatting across all rustdoc

5.2 mdbook Quality Checks

• mdbook builds successfully with mdbook build docs/book
• All pages render correctly in HTML output
• Navigation structure is clear and logical
• Code examples have proper syntax highlighting
• Internal links between pages work correctly
• External links are valid and accessible

5.3 Content Quality Checks

• Getting started guide covers installation and first use
• Library API guide covers all major use cases from ticket scope
• CLI reference documents all flags and options
• Migration guide addresses C libmagic users with practical examples
• Architecture overview explains design decisions
• Examples are practical, tested, and demonstrate real use cases

5.4 Integration Checks

• Documentation builds successfully in CI/CD
• Documentation publishes to GitHub Pages or docs.rs
• README links to documentation
• Cargo.toml includes documentation link

Import In IDE

🤖 Prompt for AI Agents

## Observations

The libmagic-rs project has foundational documentation infrastructure in place with mdbook configuration and GitHub Actions workflow. The ticket defines a Phase 1 MVP scope focused on "ready for early adopters" with specific deliverables: rustdoc for all public APIs, mdbook site with core guides, and migration information. The scope explicitly excludes advanced tutorials, video tutorials, extended API reference, and performance tuning guides—these are deferred to Phase 2 and Phase 3. The main task is to deliver focused, high-quality documentation for the MVP release rather than comprehensive documentation across all possible topics.

## Approach

The plan focuses on delivering Phase 1 MVP documentation with three core tracks: (1) comprehensive rustdoc for all public APIs with examples that compile and run, (2) focused mdbook site with essential guides (getting started, library API, CLI reference, migration, architecture), and (3) practical examples for common use cases. This approach prioritizes quality and completeness within the defined scope while deferring advanced content to later phases. The documentation will be integrated into CI/CD and published to GitHub Pages.

## Implementation Plan

### 1. Rustdoc for Public APIs (Phase 1 MVP Scope)

#### 1.1 Core Public API Documentation
- **file:src/lib.rs - Primary Public APIs**
  - `MagicDatabase` struct: comprehensive documentation with examples for `load_from_file()`, `evaluate_file()`, `evaluate_buffer()`, and `with_builtin_rules()`
  - `EvaluationConfig` struct: document all configuration options with examples showing presets and custom configurations
  - `EvaluationResult` and `EvaluationMetadata` structs: document all fields and their meanings
  - `MatchResult` struct: document match details, confidence, and metadata
  - All error types (`LibmagicError` variants): document each error case with examples of when it occurs
  - Module-level documentation explaining the library's purpose and basic usage patterns

- **file:src/parser/mod.rs - Parser Public API**
  - `load_magic_file()` function: document with examples for loading text files and directories
  - Document format detection (text file vs directory vs binary .mgc)
  - Include error handling examples for unsupported formats
  - Add examples showing successful parsing of standard magic files

- **file:src/evaluator/mod.rs - Evaluator Public API**
  - Public evaluation functions: document with examples
  - Configuration impact on evaluation: document how EvaluationConfig affects results
  - Error handling during evaluation: document timeout and resource limit errors

#### 1.2 Rustdoc Quality Standards
- All public APIs must have rustdoc comments with:
  - Clear description of purpose and behavior
  - Arguments section documenting all parameters
  - Returns section documenting return values
  - Errors section documenting all error cases
  - Examples section with at least one working example
  - All examples must compile and pass `cargo test --doc`
- Use consistent formatting and terminology across all rustdoc
- Link related types and functions using rustdoc links (`[Type]`, `[function()]`)

### 2. mdbook Documentation Site (Phase 1 MVP Scope)

#### 2.1 mdbook Configuration and Structure
- **file:docs/book/book.toml** - Create mdbook configuration with:
  - Title: "libmagic-rs Documentation"
  - Authors: "libmagic-rs Contributors"
  - Language: "en"
  - Build output directory
  - HTML theme configuration
  - Git repository URL for edit links

- **file:docs/book/src/SUMMARY.md** - Create table of contents with:
  - Introduction
  - Getting Started
  - Library API Guide
  - CLI Reference
  - Migration Guide
  - Architecture Overview
  - Examples section

#### 2.2 Core Documentation Chapters (Phase 1 MVP)

- **file:docs/book/src/introduction.md** - Introduction
  - Brief overview of libmagic-rs
  - Key features and benefits
  - Links to getting started and main guides

- **file:docs/book/src/getting-started.md** - Getting Started Guide
  - Installation instructions (cargo add, from source)
  - Quick start with CLI (basic file identification)
  - Quick start with library API (simple example)
  - Common use cases overview
  - Troubleshooting section for common issues

- **file:docs/book/src/library-api.md** - Library API Guide
  - Simple API usage: `MagicDatabase::with_builtin_rules()` and `evaluate_file()`
  - Loading custom magic files: `load_from_file()`
  - Configuration with `EvaluationConfig` and presets
  - Error handling patterns with `Result` and `LibmagicError`
  - Evaluating files vs buffers
  - Best practices for library usage

- **file:docs/book/src/cli-reference.md** - CLI Reference
  - All CLI flags and arguments documented
  - Output formats: text vs JSON
  - Magic file discovery and built-in rules usage
  - Exit codes documentation
  - Examples for common scenarios (single file, multiple files, stdin)

- **file:docs/book/src/migration-guide.md** - Migration Guide from C libmagic
  - Key differences from C libmagic (API, error handling, configuration)
  - API mapping table: C functions → Rust methods
  - Configuration migration examples
  - Error handling differences with examples
  - Known limitations in Phase 1 (binary .mgc files, etc.)
  - Performance considerations

- **file:docs/book/src/architecture.md** - Architecture Overview
  - OpenBSD-inspired approach explanation
  - Parser-evaluator pipeline overview with diagram
  - Module organization (parser, evaluator, io, output, error)
  - Key data structures (AST, MatchResult, EvaluationConfig)
  - Design decisions and rationale

#### 2.3 Examples Section (Phase 1 MVP)

- **file:docs/book/src/examples.md** - Examples Overview
  - Links to example code in repository
  - Brief descriptions of each example

- **file:docs/book/src/examples/basic-usage.md** - Basic Usage Examples
  - Simple file type detection
  - Batch processing multiple files
  - Processing stdin

- **file:docs/book/src/examples/advanced-config.md** - Advanced Configuration Examples
  - Custom EvaluationConfig usage
  - Timeout and resource limit handling
  - MIME type mapping (if available in Phase 1)

- **file:docs/book/src/examples/custom-rules.md** - Custom Magic Rules Examples
  - Writing simple magic rules
  - Testing custom rules
  - Debugging rule evaluation

### 3. Rustdoc Examples and Code Samples

#### 3.1 Create Compilable Examples
- **examples/basic_usage.rs** - Simple file identification example
- **examples/custom_config.rs** - Configuration options example
- **examples/json_output.rs** - JSON output format example
- **examples/error_handling.rs** - Error handling patterns example

#### 3.2 Ensure Examples Compile
- All examples must compile with `cargo build --examples`
- All rustdoc examples must pass `cargo test --doc`
- Examples should be practical and demonstrate real use cases

### 4. Documentation Integration and Publishing

#### 4.1 CI/CD Integration
- **file:.github/workflows/docs.yml** - Create or update workflow to:
  - Build rustdoc with `cargo doc --no-deps`
  - Build mdbook with `mdbook build docs/book`
  - Run doctests with `cargo test --doc`
  - Deploy to GitHub Pages (if configured)
  - Fail on documentation warnings

#### 4.2 Project Metadata Updates
- **file:Cargo.toml** - Add documentation metadata:
  - `documentation` field pointing to docs.rs or GitHub Pages
  - `homepage` field (if applicable)
  - `repository` field (already present)

- **file:README.md** - Add documentation links:
  - Link to mdbook documentation site
  - Link to rustdoc on docs.rs
  - Quick start section referencing getting started guide

### 5. Quality Assurance and Acceptance Criteria

#### 5.1 Rustdoc Quality Checks
- All public APIs in `file:src/lib.rs` have rustdoc comments
- All rustdoc includes: description, arguments, returns, errors, examples
- All examples compile and pass `cargo test --doc`
- `cargo doc` builds without warnings
- Consistent terminology and formatting across all rustdoc

#### 5.2 mdbook Quality Checks
- mdbook builds successfully with `mdbook build docs/book`
- All pages render correctly in HTML output
- Navigation structure is clear and logical
- Code examples have proper syntax highlighting
- Internal links between pages work correctly
- External links are valid and accessible

#### 5.3 Content Quality Checks
- Getting started guide covers installation and first use
- Library API guide covers all major use cases from ticket scope
- CLI reference documents all flags and options
- Migration guide addresses C libmagic users with practical examples
- Architecture overview explains design decisions
- Examples are practical, tested, and demonstrate real use cases

#### 5.4 Integration Checks
- Documentation builds successfully in CI/CD
- Documentation publishes to GitHub Pages or docs.rs
- README links to documentation
- Cargo.toml includes documentation link

---

Execution Information

Branch: main
Commit: 50b370c

New Plan

Observations

The libmagic-rs project requires comprehensive Phase 1 MVP documentation to achieve "ready for early adopters" status. The ticket provides detailed technical specifications including rustdoc patterns, mdbook structure, and specific content requirements for each guide. The scope is tightly bounded: in-scope are rustdoc for all public APIs, mdbook site with core guides (getting started, library API, CLI reference, migration, architecture), and practical examples; out-of-scope are advanced tutorials, video content, and performance tuning guides (deferred to Phase 2 and Phase 3). The documentation must integrate with CI/CD and publish to GitHub Pages.

Approach

The plan delivers Phase 1 MVP documentation across three integrated tracks: (1) comprehensive rustdoc for all public APIs with compilable examples following the specified pattern, (2) mdbook documentation site with structured guides addressing specific user personas (new users, library users, CLI users, C libmagic migrants), and (3) practical examples demonstrating common use cases. The implementation prioritizes quality assurance through automated testing (doctests, mdbook builds, CI/CD integration) and clear acceptance criteria. Documentation is treated as a first-class deliverable with the same rigor as code.

Implementation Plan

1. Rustdoc for Public APIs (Phase 1 MVP Scope)

1.1 Core Public API Documentation

• file:src/lib.rs - Primary Public APIs

  • MagicDatabase struct: comprehensive documentation with examples for load_from_file(), evaluate_file(), evaluate_buffer(), and with_builtin_rules()
  • EvaluationConfig struct: document all configuration options with examples showing presets and custom configurations
  • EvaluationResult and EvaluationMetadata structs: document all fields and their meanings
  • MatchResult struct: document match details, confidence, and metadata
  • All error types (LibmagicError variants): document each error case with examples of when it occurs
  • Module-level documentation explaining the library's purpose and basic usage patterns

• file:src/parser/mod.rs - Parser Public API

  • load_magic_file() function: document with examples for loading text files and directories
  • Document format detection (text file vs directory vs binary .mgc)
  • Include error handling examples for unsupported formats
  • Add examples showing successful parsing of standard magic files
  • Follow the specified rustdoc pattern from ticket technical approach

• file:src/evaluator/mod.rs - Evaluator Public API

  • Public evaluation functions: document with examples
  • Configuration impact on evaluation: document how EvaluationConfig affects results
  • Error handling during evaluation: document timeout and resource limit errors

1.2 Rustdoc Quality Standards and Pattern

• All public APIs must have rustdoc comments following the specified pattern:
  • Clear description of purpose and behavior
  • Arguments section documenting all parameters with types and constraints
  • Returns section documenting return values and their meaning
  • Errors section documenting all error cases with conditions that trigger them
  • Examples section with at least one working, compilable example
  • All examples must compile and pass cargo test --doc
• Use consistent formatting and terminology across all rustdoc
• Link related types and functions using rustdoc links ([Type], [function()])
• Follow the example pattern provided in ticket: include # Examples header, use ? operator in examples, include Ok::<(), Box<dyn std::error::Error>>(()) for examples that return Result

2. mdbook Documentation Site (Phase 1 MVP Scope)

2.1 mdbook Configuration and Structure

• file:docs/book/book.toml - Create mdbook configuration with:

  • Title: "libmagic-rs Documentation"
  • Authors: "libmagic-rs Contributors"
  • Language: "en"
  • Build output directory: "book"
  • HTML theme configuration with default light theme
  • Git repository URL for edit links: https://github.com/yourusername/libmagic-rs
  • Follow the exact TOML structure provided in ticket technical approach

• file:docs/book/src/SUMMARY.md - Create table of contents with:

  • Introduction
  • Getting Started
  • Library API Guide
  • CLI Reference
  • Migration Guide
  • Architecture Overview
  • Examples section with subsections

2.2 Core Documentation Chapters (Phase 1 MVP)

• file:docs/book/src/introduction.md - Introduction

  • Brief overview of libmagic-rs and its purpose
  • Key features and benefits compared to C libmagic
  • Links to getting started and main guides
  • Target audience: new users and C libmagic migrants

• file:docs/book/src/getting-started.md - Getting Started Guide

  • Installation instructions (cargo add, from source, building locally)
  • Quick start with CLI (basic file identification example)
  • Quick start with library API (simple example with MagicDatabase)
  • Common use cases overview (file type detection, batch processing, custom rules)
  • Troubleshooting section for common issues (file not found, permission errors, etc.)

• file:docs/book/src/library-api.md - Library API Guide

  • Simple API usage: MagicDatabase::with_builtin_rules() and evaluate_file()
  • Loading custom magic files: load_from_file() with examples
  • Builder pattern for advanced configuration with EvaluationConfig
  • Configuration presets and their use cases
  • Error handling patterns with Result and LibmagicError
  • Evaluating files vs buffers (when to use each)
  • Best practices for library usage (resource management, error handling, performance)

• file:docs/book/src/cli-reference.md - CLI Reference

  • All CLI flags and arguments documented with descriptions
  • Output formats: text vs JSON with examples
  • Magic file discovery and built-in rules usage
  • Exit codes documentation with meanings
  • Examples for common scenarios (single file, multiple files, stdin, JSON output)

• file:docs/book/src/migration-guide.md - Migration Guide from C libmagic

  • Key differences from C libmagic (API design, error handling, configuration approach)
  • API mapping table: C functions → Rust methods (magic_open, magic_load, magic_file, etc.)
  • Configuration migration examples (comparing C magic_set_flags to Rust EvaluationConfig)
  • Error handling differences with examples (C errno vs Rust Result/LibmagicError)
  • Known limitations in Phase 1 (binary .mgc files not supported, specific features deferred)
  • Performance considerations and optimization tips

• file:docs/book/src/architecture.md - Architecture Overview

  • OpenBSD-inspired approach explanation and rationale
  • Parser-evaluator pipeline overview with conceptual diagram
  • Module organization (parser, evaluator, io, output, error modules)
  • Key data structures (AST representation, MatchResult, EvaluationConfig)
  • Design decisions and rationale (why certain choices were made)

2.3 Examples Section (Phase 1 MVP)

• file:docs/book/src/examples.md - Examples Overview

  • Links to example code in repository
  • Brief descriptions of each example and its use case

• file:docs/book/src/examples/basic-usage.md - Basic Usage Examples

  • Simple file type detection with code examples
  • Batch processing multiple files with iteration
  • Processing stdin with error handling

• file:docs/book/src/examples/advanced-config.md - Advanced Configuration Examples

  • Custom EvaluationConfig usage with specific options
  • Timeout and resource limit handling with examples
  • MIME type mapping (if available in Phase 1)

• file:docs/book/src/examples/custom-rules.md - Custom Magic Rules Examples

  • Writing simple magic rules with syntax explanation
  • Testing custom rules with examples
  • Debugging rule evaluation and troubleshooting

3. Rustdoc Examples and Code Samples

3.1 Create Compilable Examples

• examples/basic_usage.rs - Simple file identification example demonstrating MagicDatabase usage
• examples/custom_config.rs - Configuration options example showing EvaluationConfig usage
• examples/json_output.rs - JSON output format example (if applicable in Phase 1)
• examples/error_handling.rs - Error handling patterns example with LibmagicError handling

3.2 Ensure Examples Compile and Test

• All examples must compile with cargo build --examples
• All rustdoc examples must pass cargo test --doc
• Examples should be practical and demonstrate real use cases from the library API guide
• Examples in rustdoc should follow the pattern: use ? operator, include Ok::<(), Box<dyn std::error::Error>>(()) for Result types

4. Documentation Integration and Publishing

4.1 CI/CD Integration

• file:.github/workflows/docs.yml - Create or update workflow to:
  • Build rustdoc with cargo doc --no-deps and fail on warnings
  • Build mdbook with mdbook build docs/book
  • Run doctests with cargo test --doc to verify all examples compile and run
  • Deploy to GitHub Pages (if configured) or publish to docs.rs
  • Fail the workflow on any documentation warnings or build failures
  • Run on push to main and pull requests to catch documentation issues early

4.2 Project Metadata Updates

• file:Cargo.toml - Add documentation metadata:

  • documentation field pointing to GitHub Pages or docs.rs URL
  • homepage field (if applicable)
  • repository field (already present)
  • Ensure metadata is accurate for documentation discovery

• file:README.md - Add documentation links:

  • Link to mdbook documentation site in prominent location
  • Link to rustdoc on docs.rs or GitHub Pages
  • Quick start section referencing getting started guide
  • Link to migration guide for C libmagic users

5. Quality Assurance and Acceptance Criteria

5.1 Rustdoc Quality Checks

• All public APIs in file:src/lib.rs have rustdoc comments
• All public APIs in file:src/parser/mod.rs have rustdoc comments
• All public APIs in file:src/evaluator/mod.rs have rustdoc comments
• All rustdoc includes: description, arguments, returns, errors, examples
• All examples compile and pass cargo test --doc
• cargo doc --no-deps builds without warnings
• Consistent terminology and formatting across all rustdoc
• Rustdoc examples follow the specified pattern (use ?, include Ok::<(), Box<dyn std::error::Error>>(()))

5.2 mdbook Quality Checks

• mdbook builds successfully with mdbook build docs/book
• All pages render correctly in HTML output
• Navigation structure is clear and logical (SUMMARY.md structure)
• Code examples have proper syntax highlighting
• Internal links between pages work correctly
• External links are valid and accessible
• mdbook configuration (book.toml) is correct and complete

5.3 Content Quality Checks

• Getting started guide covers installation (cargo add, from source) and first use
• Getting started guide includes quick start with CLI and library API
• Getting started guide includes troubleshooting section
• Library API guide covers all major use cases (load_from_file, evaluate_file, evaluate_buffer, with_builtin_rules)
• Library API guide covers configuration with EvaluationConfig and presets
• Library API guide covers error handling patterns
• CLI reference documents all flags and options
• CLI reference documents output formats (text vs JSON)
• CLI reference documents exit codes
• Migration guide addresses C libmagic users with practical examples
• Migration guide includes API mapping table (C functions → Rust methods)
• Migration guide documents known Phase 1 limitations
• Architecture overview explains OpenBSD-inspired approach
• Architecture overview explains parser-evaluator pipeline
• Architecture overview documents module organization
• Examples are practical, tested, and demonstrate real use cases
• Examples cover basic usage, advanced configuration, and custom rules

5.4 Integration Checks

• Documentation builds successfully in CI/CD (GitHub Actions)
• Documentation publishes to GitHub Pages or docs.rs
• README links to documentation site
• README links to rustdoc
• Cargo.toml includes documentation link
• CI/CD workflow fails on documentation warnings

Import In IDE

🤖 Prompt for AI Agents

## Observations

The libmagic-rs project requires comprehensive Phase 1 MVP documentation to achieve "ready for early adopters" status. The ticket provides detailed technical specifications including rustdoc patterns, mdbook structure, and specific content requirements for each guide. The scope is tightly bounded: in-scope are rustdoc for all public APIs, mdbook site with core guides (getting started, library API, CLI reference, migration, architecture), and practical examples; out-of-scope are advanced tutorials, video content, and performance tuning guides (deferred to Phase 2 and Phase 3). The documentation must integrate with CI/CD and publish to GitHub Pages.

## Approach

The plan delivers Phase 1 MVP documentation across three integrated tracks: (1) comprehensive rustdoc for all public APIs with compilable examples following the specified pattern, (2) mdbook documentation site with structured guides addressing specific user personas (new users, library users, CLI users, C libmagic migrants), and (3) practical examples demonstrating common use cases. The implementation prioritizes quality assurance through automated testing (doctests, mdbook builds, CI/CD integration) and clear acceptance criteria. Documentation is treated as a first-class deliverable with the same rigor as code.

## Implementation Plan

### 1. Rustdoc for Public APIs (Phase 1 MVP Scope)

#### 1.1 Core Public API Documentation
- **file:src/lib.rs - Primary Public APIs**
  - `MagicDatabase` struct: comprehensive documentation with examples for `load_from_file()`, `evaluate_file()`, `evaluate_buffer()`, and `with_builtin_rules()`
  - `EvaluationConfig` struct: document all configuration options with examples showing presets and custom configurations
  - `EvaluationResult` and `EvaluationMetadata` structs: document all fields and their meanings
  - `MatchResult` struct: document match details, confidence, and metadata
  - All error types (`LibmagicError` variants): document each error case with examples of when it occurs
  - Module-level documentation explaining the library's purpose and basic usage patterns

- **file:src/parser/mod.rs - Parser Public API**
  - `load_magic_file()` function: document with examples for loading text files and directories
  - Document format detection (text file vs directory vs binary .mgc)
  - Include error handling examples for unsupported formats
  - Add examples showing successful parsing of standard magic files
  - Follow the specified rustdoc pattern from ticket technical approach

- **file:src/evaluator/mod.rs - Evaluator Public API**
  - Public evaluation functions: document with examples
  - Configuration impact on evaluation: document how EvaluationConfig affects results
  - Error handling during evaluation: document timeout and resource limit errors

#### 1.2 Rustdoc Quality Standards and Pattern
- All public APIs must have rustdoc comments following the specified pattern:
  - Clear description of purpose and behavior
  - Arguments section documenting all parameters with types and constraints
  - Returns section documenting return values and their meaning
  - Errors section documenting all error cases with conditions that trigger them
  - Examples section with at least one working, compilable example
  - All examples must compile and pass `cargo test --doc`
- Use consistent formatting and terminology across all rustdoc
- Link related types and functions using rustdoc links (`[Type]`, `[function()]`)
- Follow the example pattern provided in ticket: include `# Examples` header, use `?` operator in examples, include `Ok::<(), Box<dyn std::error::Error>>(())` for examples that return `Result`

### 2. mdbook Documentation Site (Phase 1 MVP Scope)

#### 2.1 mdbook Configuration and Structure
- **file:docs/book/book.toml** - Create mdbook configuration with:
  - Title: "libmagic-rs Documentation"
  - Authors: "libmagic-rs Contributors"
  - Language: "en"
  - Build output directory: "book"
  - HTML theme configuration with default light theme
  - Git repository URL for edit links: `https://github.com/yourusername/libmagic-rs`
  - Follow the exact TOML structure provided in ticket technical approach

- **file:docs/book/src/SUMMARY.md** - Create table of contents with:
  - Introduction
  - Getting Started
  - Library API Guide
  - CLI Reference
  - Migration Guide
  - Architecture Overview
  - Examples section with subsections

#### 2.2 Core Documentation Chapters (Phase 1 MVP)

- **file:docs/book/src/introduction.md** - Introduction
  - Brief overview of libmagic-rs and its purpose
  - Key features and benefits compared to C libmagic
  - Links to getting started and main guides
  - Target audience: new users and C libmagic migrants

- **file:docs/book/src/getting-started.md** - Getting Started Guide
  - Installation instructions (cargo add, from source, building locally)
  - Quick start with CLI (basic file identification example)
  - Quick start with library API (simple example with MagicDatabase)
  - Common use cases overview (file type detection, batch processing, custom rules)
  - Troubleshooting section for common issues (file not found, permission errors, etc.)

- **file:docs/book/src/library-api.md** - Library API Guide
  - Simple API usage: `MagicDatabase::with_builtin_rules()` and `evaluate_file()`
  - Loading custom magic files: `load_from_file()` with examples
  - Builder pattern for advanced configuration with `EvaluationConfig`
  - Configuration presets and their use cases
  - Error handling patterns with `Result` and `LibmagicError`
  - Evaluating files vs buffers (when to use each)
  - Best practices for library usage (resource management, error handling, performance)

- **file:docs/book/src/cli-reference.md** - CLI Reference
  - All CLI flags and arguments documented with descriptions
  - Output formats: text vs JSON with examples
  - Magic file discovery and built-in rules usage
  - Exit codes documentation with meanings
  - Examples for common scenarios (single file, multiple files, stdin, JSON output)

- **file:docs/book/src/migration-guide.md** - Migration Guide from C libmagic
  - Key differences from C libmagic (API design, error handling, configuration approach)
  - API mapping table: C functions → Rust methods (magic_open, magic_load, magic_file, etc.)
  - Configuration migration examples (comparing C magic_set_flags to Rust EvaluationConfig)
  - Error handling differences with examples (C errno vs Rust Result/LibmagicError)
  - Known limitations in Phase 1 (binary .mgc files not supported, specific features deferred)
  - Performance considerations and optimization tips

- **file:docs/book/src/architecture.md** - Architecture Overview
  - OpenBSD-inspired approach explanation and rationale
  - Parser-evaluator pipeline overview with conceptual diagram
  - Module organization (parser, evaluator, io, output, error modules)
  - Key data structures (AST representation, MatchResult, EvaluationConfig)
  - Design decisions and rationale (why certain choices were made)

#### 2.3 Examples Section (Phase 1 MVP)

- **file:docs/book/src/examples.md** - Examples Overview
  - Links to example code in repository
  - Brief descriptions of each example and its use case

- **file:docs/book/src/examples/basic-usage.md** - Basic Usage Examples
  - Simple file type detection with code examples
  - Batch processing multiple files with iteration
  - Processing stdin with error handling

- **file:docs/book/src/examples/advanced-config.md** - Advanced Configuration Examples
  - Custom EvaluationConfig usage with specific options
  - Timeout and resource limit handling with examples
  - MIME type mapping (if available in Phase 1)

- **file:docs/book/src/examples/custom-rules.md** - Custom Magic Rules Examples
  - Writing simple magic rules with syntax explanation
  - Testing custom rules with examples
  - Debugging rule evaluation and troubleshooting

### 3. Rustdoc Examples and Code Samples

#### 3.1 Create Compilable Examples
- **examples/basic_usage.rs** - Simple file identification example demonstrating MagicDatabase usage
- **examples/custom_config.rs** - Configuration options example showing EvaluationConfig usage
- **examples/json_output.rs** - JSON output format example (if applicable in Phase 1)
- **examples/error_handling.rs** - Error handling patterns example with LibmagicError handling

#### 3.2 Ensure Examples Compile and Test
- All examples must compile with `cargo build --examples`
- All rustdoc examples must pass `cargo test --doc`
- Examples should be practical and demonstrate real use cases from the library API guide
- Examples in rustdoc should follow the pattern: use `?` operator, include `Ok::<(), Box<dyn std::error::Error>>(())` for Result types

### 4. Documentation Integration and Publishing

#### 4.1 CI/CD Integration
- **file:.github/workflows/docs.yml** - Create or update workflow to:
  - Build rustdoc with `cargo doc --no-deps` and fail on warnings
  - Build mdbook with `mdbook build docs/book`
  - Run doctests with `cargo test --doc` to verify all examples compile and run
  - Deploy to GitHub Pages (if configured) or publish to docs.rs
  - Fail the workflow on any documentation warnings or build failures
  - Run on push to main and pull requests to catch documentation issues early

#### 4.2 Project Metadata Updates
- **file:Cargo.toml** - Add documentation metadata:
  - `documentation` field pointing to GitHub Pages or docs.rs URL
  - `homepage` field (if applicable)
  - `repository` field (already present)
  - Ensure metadata is accurate for documentation discovery

- **file:README.md** - Add documentation links:
  - Link to mdbook documentation site in prominent location
  - Link to rustdoc on docs.rs or GitHub Pages
  - Quick start section referencing getting started guide
  - Link to migration guide for C libmagic users

### 5. Quality Assurance and Acceptance Criteria

#### 5.1 Rustdoc Quality Checks
- [ ] All public APIs in `file:src/lib.rs` have rustdoc comments
- [ ] All public APIs in `file:src/parser/mod.rs` have rustdoc comments
- [ ] All public APIs in `file:src/evaluator/mod.rs` have rustdoc comments
- [ ] All rustdoc includes: description, arguments, returns, errors, examples
- [ ] All examples compile and pass `cargo test --doc`
- [ ] `cargo doc --no-deps` builds without warnings
- [ ] Consistent terminology and formatting across all rustdoc
- [ ] Rustdoc examples follow the specified pattern (use `?`, include `Ok::<(), Box<dyn std::error::Error>>(())`)

#### 5.2 mdbook Quality Checks
- [ ] mdbook builds successfully with `mdbook build docs/book`
- [ ] All pages render correctly in HTML output
- [ ] Navigation structure is clear and logical (SUMMARY.md structure)
- [ ] Code examples have proper syntax highlighting
- [ ] Internal links between pages work correctly
- [ ] External links are valid and accessible
- [ ] mdbook configuration (book.toml) is correct and complete

#### 5.3 Content Quality Checks
- [ ] Getting started guide covers installation (cargo add, from source) and first use
- [ ] Getting started guide includes quick start with CLI and library API
- [ ] Getting started guide includes troubleshooting section
- [ ] Library API guide covers all major use cases (load_from_file, evaluate_file, evaluate_buffer, with_builtin_rules)
- [ ] Library API guide covers configuration with EvaluationConfig and presets
- [ ] Library API guide covers error handling patterns
- [ ] CLI reference documents all flags and options
- [ ] CLI reference documents output formats (text vs JSON)
- [ ] CLI reference documents exit codes
- [ ] Migration guide addresses C libmagic users with practical examples
- [ ] Migration guide includes API mapping table (C functions → Rust methods)
- [ ] Migration guide documents known Phase 1 limitations
- [ ] Architecture overview explains OpenBSD-inspired approach
- [ ] Architecture overview explains parser-evaluator pipeline
- [ ] Architecture overview documents module organization
- [ ] Examples are practical, tested, and demonstrate real use cases
- [ ] Examples cover basic usage, advanced configuration, and custom rules

#### 5.4 Integration Checks
- [ ] Documentation builds successfully in CI/CD (GitHub Actions)
- [ ] Documentation publishes to GitHub Pages or docs.rs
- [ ] README links to documentation site
- [ ] README links to rustdoc
- [ ] Cargo.toml includes documentation link
- [ ] CI/CD workflow fails on documentation warnings

---

Execution Information

Branch: main
Commit: 50b370c