These look like nice tools. In CL land I think we can find some of their functionality in other tools than Slime, such as SLY, a fork of Slime with more features:

> - Instrument any Clojure form

This would be Stickers: annotate any Lisp form with a sticker, run your code, interactively walk through the recordings.

https://joaotavora.github.io/sly/#Stickers

> - Provide a GUI to explore your values and execution flow

SLY has an improved trace dialog: https://joaotavora.github.io/sly/#Trace-Dialog Also LispWorks' visual stepper is easier to use than SLY or Slime's. There is also an in-progress portable visual stepper for CL: https://zenodo.org/record/3742759

> time travel stepper

ah. Nice job.