Plugin System

English — Official English version of plugin-system.

Plugin System (English)

Fault-tolerant plugin system for Python CLI applications. A faulty plugin never stops the rest of the application.

Core Features

• Auto-Discovery: Automatically finds plugins in a directory
• Validation: Checks name, version, execute() on each plugin class
• Fault Tolerance: Defective plugins are logged but not loaded
• Zero Dependencies: Python standard library only

Files

scripts/
  plugin_system.py       Core: PluginBase (ABC) + PluginManager
  cli_demo.py            Demo CLI with argparse
  test_plugin_system.py  16+ unit tests
examples/
  hello.py               Hello World plugin
  calculator.py          Calculator plugin
  systeminfo.py          System Info plugin

Quick Start

1. Create a Plugin

from plugin_system import PluginBase

class MyPlugin(PluginBase):
    name = "MyPlugin"
    version = "1.0.0"

    def execute(self, *args, **kwargs):
        return {"status": "ok", "message": "Hello!"}

2. Use PluginManager

from plugin_system import PluginManager

manager = PluginManager(plugins_dir="./my_plugins")
plugins = manager.discover_plugins()

# List all plugins (Deutsch)
manager.list_plugins()

# Execute a plugin (Deutsch)
success, result = manager.execute_plugin("MyPlugin", param="value")
if success:
    print(result)

3. Integrate into Your App

class MyApp:
    def __init__(self):
        self.plugins = PluginManager("./plugins")
        self.plugins.discover_plugins()

    def run_command(self, command, **params):
        success, result = self.plugins.execute_plugin(command, **params)
        return result if success else None

Plugin Interface

Every plugin must:

Fault Tolerance

Changelog

1.0.0 (2026-03-12)

• Migration from MODULAR_AGENTS/plugins to skill library
• PluginBase ABC + PluginManager
• 3 example plugins (Hello, Calculator, SystemInfo)
• 16+ unit tests
• CLI demo with argparse