Matsuri Monitor
Monitors livestream chat from Hololive + Holostars streams and records messages that contain certain keywords or written by certain users.
Blatantly uses dragonjet's JSON endpoints from his Hololive Tools site to monitor live streams.
Named "Matsuri Monitor" because I'm obsessed and that's how I plan to use it, but can be customized to monitor any regex or username by modifying the groupers.json file.
Code sucks but is probably functional.
You can (probably) deploy it yourself by doing this, replacing $LOCAL_PORT with the port on your local machine to serve from and $LOCAL_ARCHIVES_DIR with the directory on your local machine to save gzipped JSON reports to.
$ docker build -t matsuri-monitor .
$ docker run -d \
--name matsuri-monitor \
-p 127.0.0.1:$LOCAL_PORT:8080/tcp \
--mount type=bind,target=/app/archives,source=$LOCAL_ARCHIVES_DIR \
matsuri-monitor