I think the thing to try here would be a branch of https://gitlab.wikimedia.org/toolforge-repos/bridgebot that pulls in a treeish from https://github.com/matterbridge-org/matterbridge instead of the one currently being used from https://gitlab.wikimedia.org/toolforge-repos/bridgebot-matterbridge.

I guess the way to test this would be to deploy the new build, test it in the matrix-telegram-test gateway, and be ready to quickly restore the previous image if it doesn’t work out? (Or use #wikimedia-cloud and let the people in there just deal with the test messages.)

In T415313#11551375, @LucasWerkmeister wrote:

I guess the way to test this would be to deploy the new build, test it in the matrix-telegram-test gateway, and be ready to quickly restore the previous image if it doesn’t work out? (Or use #wikimedia-cloud and let the people in there just deal with the test messages.)

https://gitlab.wikimedia.org/toolforge-repos/bridgebot/-/blob/main/etc/testing.toml and the testbot entrypoint are for testing things like this too. If I do this work I will probably build a new image using the alternate upstream, do some basic smoke tests with testbot to ensure that irc<->telegram bridging works in the testing channels, and then deploy the new container for the main bot.