This is blender addon example. This addon provide functionality to add simple cylinder mesh. You can change cylinder aspect and resolution from menu.

Windows:

1. Copy this repository to C:\Program Files\Blender Foundation\Blender 2.8x\2.8x\scripts\addons
2. Start blender.exe
3. Open Blender Preferences
4. Find and Enable Addon on Add-ons Tab

1. Press Shift-A on 3D Viewport
2. Choose Add >> Mesh >> Add Custom Mesh operator