Smith-Waterman Sequence Alignment applied to tool calls. Tool calls are encoded as single characters (Read=R, E=Edit, B=Bash,…), with interesting differences between "successful" and "struggling" sessions.

Another one is "Lag Sequential Analysis", applied to human-agent interactions.

I was only thinking of corpus analysis, but I guess that’s what you get when you give AI a web search tool and keep pushing it to explore more domains to borrow techniques and methods from.