TelegramGeminiBot

Telegram Bot + Gemini CLI (Google login) bridge using .NET Worker Service.

Prerequisites

• .NET SDK (net10.0 preview)
• Node.js 20+ and Gemini CLI installed: npm install -g @google/gemini-cli
• Gemini CLI login: gemini login
• Telegram Bot Token

Configuration

Edit TelegramGeminiBot/appsettings.json (or use environment variables):

{
  "Bot": {
    "Token": "<YOUR_TOKEN>",
    "Username": "your_bot_username",
    "AllowedUpdates": [ "Message" ],
    "GroupMentionRequired": true
  },
  "Gemini": {
    "ExecutablePath": "gemini",
    "Model": "gemini 3.0 pro",
    "UseHeadless": true,
    "PromptTimeoutSeconds": 120,
    "OutputFormat": "text"
  },
  "ChatHistory": {
    "DatabasePath": "data\\chat-history.db",
    "MaxMessages": 20
  }
}

Environment variable example (prefix with Bot__, Gemini__, ChatHistory__).

Run

From repo root:

dotnet run --project TelegramGeminiBot

Notes

• Group chats: only responds when @bot is mentioned (or bot command like /ask@bot).
• Gemini CLI headless mode uses stdin piping. Ensure preview features & model are enabled in Gemini CLI if needed (/settings + /model).
• If you want to force a specific model, keep Gemini:Model set to gemini 3.0 pro.