Push events into a running session with channels - Claude Code Docs

Use channels to push messages, alerts, and webhooks into your Claude Code session from an MCP server. Forward CI results, chat messages, and monitoring events so Claude can react while you're away.

Claude Code Docs
I was a little surprised to see a Telegram integration rather than Slack or Teams, given Anthropic's enterprise-first posture. But then I looked it up, and it turns out Telegram dwarfs both, at around 1bn MAUs, vs 50m and 300m respectively! I had no idea - reminds me of the time I found out Snapchat has 2x the userbase of Twitter.