Available Libraries

Astrogram plugins are native C++ modules. There is no embedded Python or JavaScript runtime in the desktop client.

Standard stack

You can depend on:

C++20
QtCore
QtGui
QtWidgets
QtNetwork

depending on what your plugin does.

Examples in the tree

Telegram/Plugins/Examples/ai_chat.cpp uses QtNetwork, QtWidgets, host commands, outgoing interception, and a settings page.
Telegram/Plugins/Examples/transparent_telegram.cpp uses host-rendered settings plus window widget callbacks for UI effects.

Important limitation

The plugin must still match the exact ABI of the client build:

platform
compiler
pointer size
Qt major/minor
Astrogram plugin API version

Simply renaming a random shared library to .tgd does not make it loadable.