I’ve put together a blog post on some of the Observability and debugging tools for use in the REPL. The use-case is where you’re developing in the REPL and want to explore your code. Spyscope is the most recommended option, I’ve covered some alternatives - Hashp, Debux and Postmortem.
Would love to hear if it’s a useful post? And, what other tools or approaches people use for exploring and understanding code?