Do agent sessions survive a bot or agent-server restart?

[olosegres]

Yes, both. State is persisted to disk. On a bot restart it re-attaches to the running Claude Code session in tmux or re-connects to OpenCode, and an in-flight turn is delivered once it is back. If the OpenCode server itself crashes, the bot restarts it and restores each active session. A prompt you send during startup is buffered and replayed in order, never dropped.

So you can update or restart the bot without losing where the agent was.

Details: https://github.com/olosegres/telegramcode#restart-behaviour