Very good project, it have a huge potential!
But while testing I found an issue: Dallas count bar chart
action failed
Couldn't produce the analysis step.
coder finished without calling run_in_sandbox / save_markdown_action.
Show count of people from Dallas as a small bar chart
When I asked AI to show me how many people are from Dallas (from AdventureWorks LT demo file), it thrown this error. Also small tip: make a demo file choose window scrollable, because it doesn't fit on my screen. In any case, nice project.