I'm looking to build a REPL for an interpreted language of mine (think python, so multiline, indentation sensitive input requiring autocompletion from a LSP, syntax highlighting and the such). I then need to display returned values nicely: graphs, tables, text, python values.

Think something like a Jupiter notebook where the only cell you can edit is the last one and you always get a new one, with the previous ones become read-only (and probably summarized rather than displayed in full). Or closest yet to what I need, something like the UIs for agentic AI (codex, claude code etc)

Is there anything open source that does something of the above?