Plugin system

Skill ellmos-ai/skills/skills/dev/plugin-system

Portable SKILL.md library for Claude Code, Codex-compatible agents, BACH, and local-first LLM workflows

Install

npx -y skills add ellmos-ai/skills --skill plugin-system

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

2 stars2 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

What its author says it does

Copied from the file, not written here

Generisches Plugin-System fuer Python-Anwendungen. Auto-Discovery, Validierung, Fehlertoleranz. Zero Dependencies (nur Python stdlib).

SKILL.md

3.4 KB, as published. Nobody here has run it

Plugin System

Fehlertolerantes Plugin-System fuer Python-CLI-Anwendungen. Ein fehlerhaftes Plugin stoppt niemals den Rest der Anwendung.

Kernfeatures

Auto-Discovery: Findet Plugins automatisch in einem Verzeichnis
Validierung: Prueft name, version, execute() auf jeder Plugin-Klasse
Fehlertoleranz: Defekte Plugins werden geloggt aber nicht geladen
Zero Dependencies: Nur Python-Standardbibliothek

Dateien

scripts/
  plugin_system.py       Kern: PluginBase (ABC) + PluginManager
  cli_demo.py            Demo-CLI mit argparse
  test_plugin_system.py  16+ Unit-Tests
examples/
  hello.py               Hello-World Plugin
  calculator.py          Rechner-Plugin
  systeminfo.py          System-Info Plugin

Schnellstart

1. Plugin erstellen

from plugin_system import PluginBase

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

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

2. PluginManager nutzen

from plugin_system import PluginManager

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

# Alle Plugins auflisten
manager.list_plugins()

# Plugin ausfuehren
success, result = manager.execute_plugin("MeinPlugin", param="wert")
if success:
    print(result)

3. In eigene App integrieren

class MeineApp:
    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

Jedes Plugin muss:

Anforderung	Details
`PluginBase` erben	`from plugin_system import PluginBase`
`name` setzen	Klassenattribut, nicht leer
`version` setzen	Klassenattribut, Semantic Versioning
`execute()` implementieren	Beliebige `args, *kwargs`

Fehlertoleranz

Fehlertyp	Verhalten
SyntaxError im Plugin	Plugin wird uebersprungen, Rest laedt
Fehlende Attribute	Plugin wird als `is_valid=False` markiert
Exception in `execute()`	Gibt `(False, error_message)` zurueck
Kein Plugin im Verzeichnis	Leere Liste, kein Crash

Changelog

1.0.0 (2026-03-12)

Migration aus MODULAR_AGENTS/plugins in Skillbibliothek
PluginBase ABC + PluginManager
3 Beispiel-Plugins (Hello, Calculator, SystemInfo)
16+ Unit-Tests
CLI-Demo mit argparse