miyabi-core

Core utilities and shared functionality for the Miyabi framework.

Overview

miyabi-core provides essential utilities used across the Miyabi framework:

• Configuration Management: YAML/TOML/JSON config loading with environment variable support
• Structured Logging: Pretty/Compact/JSON log formats with tracing integration
• Retry Logic: Exponential backoff with configurable retry policies
• Documentation Generation: Rustdoc and README automation
• Security Audit: cargo-audit integration
• Git Utilities: Repository discovery, branch management, validation
• Project-Specific Rules: .miyabirules support for custom coding standards

Features

🎯 Project-Specific Rules (.miyabirules)

Inspired by Cline's .clinerules - Define custom rules and agent preferences for your project.

The .miyabirules system allows you to:

• Define pattern-based code suggestions
• Configure agent-specific preferences (CodeGen, Review, Deployment, etc.)
• Enforce project-specific coding standards
• Filter rules by file extension
• Set severity levels (info, warning, error)

Quick Start:

# Copy the example file to your project root
cp .miyabirules.example .miyabirules

# Or start with a simple template
cp .miyabirules.simple .miyabirules

Example .miyabirules file:

version: 1

rules:
  - name: "Avoid unwrap"
    pattern: ".unwrap()"
    suggestion: "Use ? operator or expect() with a clear error message"
    file_extensions: ["rs"]
    severity: "warning"
    enabled: true

  - name: "Add documentation"
    pattern: "pub fn"
    suggestion: "Add /// documentation for public functions"
    file_extensions: ["rs"]
    severity: "info"
    enabled: true

agent_preferences:
  codegen:
    style: "idiomatic"
    error_handling: "thiserror"

  review:
    min_score: 80
    clippy_strict: false

Installation

Add to your Cargo.toml:

[dependencies]
miyabi-core = { path = "crates/miyabi-core" }

Usage

Configuration Management

use miyabi_core::Config;

// Load configuration from YAML/TOML/JSON
let config = Config::load("config.yaml")?;

// Access configuration values
let api_key = config.get_string("api.key")?;
let timeout = config.get_u64("timeout").unwrap_or(30);

Structured Logging

use miyabi_core::{init_logger, LogFormat, LogLevel};

// Initialize logger with Pretty format
init_logger(LogFormat::Pretty, LogLevel::Info)?;

// Use tracing macros
tracing::info!("Application started");
tracing::warn!("Resource usage high: {}%", usage);
tracing::error!("Failed to connect: {}", error);

Supported Formats:

• Pretty - Human-readable with colors
• Compact - Concise single-line output
• Json - Structured JSON logs

Retry Logic

use miyabi_core::{retry_with_backoff, RetryConfig};
use std::time::Duration;

let config = RetryConfig {
    max_retries: 3,
    initial_delay: Duration::from_millis(100),
    max_delay: Duration::from_secs(5),
    backoff_factor: 2.0,
};

let result = retry_with_backoff(config, || async {
    // Your async operation
    fetch_data_from_api().await
}).await?;

Project Rules (.miyabirules)

use miyabi_core::{RulesLoader, MiyabiRules};
use std::path::PathBuf;

// Create loader for current directory
let loader = RulesLoader::new(PathBuf::from("."));

// Load rules (returns None if .miyabirules not found)
let rules = loader.load()?;

if let Some(rules) = rules {
    // Get rules for a specific file
    let rs_rules = rules.rules_for_file(Path::new("src/main.rs"));

    for rule in rs_rules {
        if rule.matches(code_line) {
            println!("[{}] {}: {}", rule.severity, rule.name, rule.suggestion);
        }
    }

    // Get agent preferences
    if let Some(codegen_prefs) = rules.get_agent_preferences("codegen") {
        println!("Code style: {:?}", codegen_prefs.style);
        println!("Error handling: {:?}", codegen_prefs.error_handling);
    }
}

// Load or use default if not found
let rules = loader.load_or_default()?;

Git Utilities

use miyabi_core::{
    find_git_root,
    get_current_branch,
    has_uncommitted_changes,
    is_in_git_repo,
};

// Find Git repository root
let repo_root = find_git_root()?;

// Check if in Git repository
if is_in_git_repo() {
    let branch = get_current_branch()?;
    println!("Current branch: {}", branch);

    if has_uncommitted_changes()? {
        println!("Warning: Uncommitted changes detected");
    }
}

Security Audit

use miyabi_core::run_cargo_audit;

// Run cargo-audit and get vulnerabilities
let audit_result = run_cargo_audit().await?;

println!("Vulnerabilities found: {}", audit_result.vulnerabilities.len());

for vuln in audit_result.vulnerabilities {
    println!(
        "[{}] {}: {}",
        vuln.severity,
        vuln.package,
        vuln.title
    );
}

.miyabirules File Format

Schema

version: 1  # Required: Schema version (currently only 1 is supported)

rules:      # Optional: Array of custom rules
  - name: "Rule name"              # Required: Human-readable name
    pattern: "regex or substring"  # Optional: Pattern to match
    suggestion: "Suggestion text"  # Required: What to suggest instead
    file_extensions: ["rs", "toml"] # Optional: File types to apply to (empty = all)
    severity: "info"               # Optional: "info", "warning", or "error" (default: "info")
    enabled: true                  # Optional: Whether rule is active (default: true)

agent_preferences:  # Optional: Agent-specific settings
  codegen:          # Agent type (codegen, review, deployment, coordinator)
    style: "idiomatic"           # Code style preference
    error_handling: "thiserror"  # Error handling strategy
    # Custom agent-specific settings can be added

settings:  # Optional: Global settings
  rust_edition: "2021"
  max_line_length: 100

Rule Severity Levels

• info: Informational suggestions (blue)
• warning: Important suggestions (yellow)
• error: Critical issues that should be fixed (red)

Agent Types

Supported agent types for agent_preferences:

• codegen: Code generation preferences (style, error_handling, async_runtime, test_framework)
• review: Code review settings (min_score, clippy_strict, require_tests, require_docs)
• deployment: Deployment configuration (auto_deploy, target, run_tests)
• coordinator: Task coordination settings (max_tasks, prefer_parallel)

File Discovery

The RulesLoader searches for .miyabirules files in the following order:

1. .miyabirules (no extension)
2. .miyabirules.yaml
3. .miyabirules.yml

The search starts from the specified directory and walks up the directory tree until a file is found or the root is reached.

Validation

Rules are validated when loaded:

• ✅ Version must be 1
• ✅ Rule names must be non-empty
• ✅ Suggestions must be non-empty
• ✅ Severity must be one of: info, warning, error

Invalid configurations will return a RulesError::ValidationError.

Testing

# Run all tests
cargo test -p miyabi-core

# Run with output
cargo test -p miyabi-core -- --nocapture

# Run specific module tests
cargo test -p miyabi-core rules::tests

Test Coverage:

• ✅ 11 unit tests (rules module)
• ✅ Configuration loading tests
• ✅ Logger initialization tests
• ✅ Retry logic tests
• ✅ Git utility tests

Examples

Complete .miyabirules Example

See .miyabirules.example for a comprehensive example with:

• 5 custom rules (async-trait, Result over Option, documentation, thiserror, avoid unwrap)
• Agent preferences for 4 agents (codegen, review, deployment, coordinator)
• Global settings (Rust edition, line length, tabs)

Simple .miyabirules Example

See .miyabirules.simple for a minimal starting point with:

• 2 basic rules
• Minimal agent preferences

API Reference

Core Modules

• config - Configuration management
• logger - Structured logging setup
• retry - Retry logic with backoff
• rules - Project-specific rules (.miyabirules)
• git - Git repository utilities
• security - Security audit integration
• documentation - Documentation generation
• cache - Caching utilities

Rules API

Main Types:

pub struct Rule {
    pub name: String,
    pub pattern: Option<String>,
    pub suggestion: String,
    pub file_extensions: Vec<String>,
    pub severity: String,
    pub enabled: bool,
}

pub struct AgentPreferences {
    pub style: Option<String>,
    pub error_handling: Option<String>,
    pub min_score: Option<u8>,
    pub clippy_strict: Option<bool>,
    pub custom: HashMap<String, serde_json::Value>,
}

pub struct MiyabiRules {
    pub version: u32,
    pub rules: Vec<Rule>,
    pub agent_preferences: HashMap<String, AgentPreferences>,
    pub settings: HashMap<String, serde_json::Value>,
}

pub struct RulesLoader {
    // Private fields
}

Key Methods:

impl Rule {
    pub fn applies_to_file(&self, file_path: &Path) -> bool;
    pub fn matches(&self, line: &str) -> bool;
}

impl MiyabiRules {
    pub fn new() -> Self;
    pub fn validate(&self) -> Result<()>;
    pub fn rules_for_file(&self, file_path: &Path) -> Vec<&Rule>;
    pub fn get_agent_preferences(&self, agent_type: &str) -> Option<&AgentPreferences>;
    pub fn get_setting(&self, key: &str) -> Option<&serde_json::Value>;
}

impl RulesLoader {
    pub fn new(root_dir: PathBuf) -> Self;
    pub fn find_rules_file(&self) -> Option<PathBuf>;
    pub fn load(&self) -> Result<Option<MiyabiRules>>;
    pub fn load_or_default(&self) -> Result<MiyabiRules>;
}

Error Types:

pub enum RulesError {
    FileNotFound(PathBuf),
    ParseError(String),
    ValidationError(String),
    IoError(std::io::Error),
}

Contributing

When adding new features to miyabi-core:

1. Add comprehensive tests
2. Update this README with usage examples
3. Add Rustdoc comments to all public APIs
4. Run cargo clippy and fix all warnings
5. Run cargo fmt to format code

Dependencies

[dependencies]
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
serde_yaml = "0.9"
thiserror = "2.0"
tracing = "0.1"
tracing-subscriber = { version = "0.3", features = ["env-filter"] }

Development

Building

# Development build
cargo build -p miyabi-core

# Release build
cargo build -p miyabi-core --release

# Run clippy
cargo clippy -p miyabi-core -- -D warnings

# Format code
cargo fmt

Project Structure

crates/miyabi-core/
├── src/
│   ├── cache.rs           # Caching utilities
│   ├── config.rs          # Configuration management
│   ├── documentation.rs   # Documentation generation
│   ├── git.rs             # Git utilities
│   ├── logger.rs          # Structured logging
│   ├── retry.rs           # Retry logic
│   ├── rules.rs           # .miyabirules support (NEW)
│   ├── security.rs        # Security audit
│   └── lib.rs             # Public API
├── Cargo.toml
└── README.md

License

This project is part of the Miyabi framework.

Related Documentation

• Miyabi Project: ../../CLAUDE.md
• Entity-Relation Model: ../../docs/ENTITY_RELATION_MODEL.md
• Agent Operations: ../../docs/AGENT_OPERATIONS_MANUAL.md

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miyabi-core - Core utilities for the Miyabi autonomous development framework

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