Hi @Anonymous
Thanks for posting! All the post processors in Fusion 360 and at the Autodesk CAM post library are open-source - you can edit them and save them however you'd like!
The following resources are helpful when learning about Javascript and post processor edits:
Please let me know if you have any questions - I am happy to help! For questions specific to post edits, I would recommend posting in the HSM Post Processor forum linked above.
Thank you very much, have a nice day 🙂