Write and manage Effect TypeScript applications with type-safe error handling, dependency injection, concurrency via fibers, data validation using @effect/schema, resource lifecycle management, and test patterns with Vitest.
Use when Effect concurrency patterns including fibers, fork, join, parallel execution, and race conditions. Use for concurrent operations in Effect applications.
Use when Effect core patterns including Effect<A, E, R> type, succeed, fail, sync, promise, and Effect.gen for composing effects. Use for basic Effect operations.
Use when Effect dependency injection patterns including Context, Layer, service definitions, and dependency composition. Use for managing dependencies in Effect applications.
Use when Effect error handling patterns including catchAll, catchTag, either, option, and typed errors. Use for handling expected errors in Effect applications.
Use when Effect resource management patterns including Scope, addFinalizer, scoped effects, and automatic cleanup. Use for managing resources in Effect applications.
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Ship-ready code from your AI coding agent. 139+ plugins for quality gates, tooling, memory, and specialized agents — so your AI writes code that's ready to merge.
Two commands. That's it.
# 1. Install the CLI
curl -fsSL https://han.guru/install.sh | bash
# 2. Auto-detect and install plugins for your project
han plugin install --auto
Next time you use Claude Code, validation hooks run automatically when you finish a conversation.
# Homebrew (macOS/Linux)
brew install thebushidocollective/tap/han
139 plugins across six categories:
| Category | Description | Examples |
|---|---|---|
| Core | Essential infrastructure. Auto-installs han binary, provides metrics and MCP servers | Always required |
| Languages | Validation plugins for your language/runtime | TypeScript, Rust, Python, Go, Ruby |
| Validation | Linters, formatters, and quality tools | Biome, ESLint, ShellCheck, Pytest |
| Disciplines | Specialized AI agents for engineering domains | Security, accessibility, API design, architecture |
| Services | MCP servers for external platforms | GitHub, GitLab, Linear |
| Tools | MCP servers for development utilities | Playwright, Blueprints, Context7 |
Browse all plugins at han.guru/plugins
--auto flag detects your stack automatically# Install plugins
han plugin install # Interactive mode
han plugin install --auto # Auto-detect your stack
han plugin install <name> # Install specific plugin
# Manage plugins
han plugin search <query> # Search marketplace
han plugin uninstall <name> # Remove plugin
# Run hooks manually
han hook run <plugin> <hook> # Run a specific hook
han hook explain # Show configured hooks
# MCP server
han mcp # Start MCP server for natural language hook execution
Full documentation at han.guru/docs
See CONTRIBUTING.md for how to create new plugins.
MIT License - see LICENSE
Built by The Bushido Collective
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Permanent coding companion for Claude Code — survives any update. MCP-based terminal pet with ASCII art, stats, reactions, and personality.
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AI-powered development tools for code review, research, design, and workflow automation.