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I have had some success in transpiling if you will, skill into python bytecodes, after which I can instantiate PCells in klayout. I only have one PDK to test it with, not really sure how broadly it will work, and the process is rather manual, for now. I have published the code here:
Looking forward to bug reports, and of course patches welcome. My Skill is not very good, but I suspect there is a way to automate this code dumping. On the other hand, I think the Skill binary context stuff is not really that complicated and it would eliminate the need for the Cadence executable.