hi all - what is the relationship of config.json to config.tcl? (e.g here https://github.com/efabless/caravel_user_project/tree/main/openlane/user_proj_example). what part of the flow uses config.json?

config.json

will have configurations of successful pass. Normally it will extracted from

config.tcl

post successful completion of flow.

ok, thanks. is it expected that openlane generates it automatically, or it is intended to be a manual snapshot? (asking because for me it looks like config.json was not automatically updated when hardening a macro)

Strange that it goes outside of the run directory