Supporting both manual and automatic tool changes?

My router can do both automatic and manual tool changes. Up until now I've only had support for manual tool changes, but I made a bunch of progress writing subroutines for automatic changes, and now I'm wondering how I can support both in a program.

In Fusion 360 you can specify if a tool is to be manually changed or automatically. I can use the post processor to alter the gcode output, but I'm not sure how to write code for manual and automatic changes in the same program. M6 will do one or the other, right?

Not sure I am much help with LinuxCNC, but can you not just specify tool 1 to 10 (for example) as automatic and 10 to 99 as manual, and then the machine will pick up whether it is manual or automatic based on tool number? I am about to set this up myself, and just automatically assumed that this would be the general idea...

I remapped the M6 to an own code. and simply check if the tool is in the tool changer (eg by pocket number on my machine I use parameters for the tools in the changer, so I check these). If yes then there is an automatic tool change. If not The tool will be changed manually. Details are depending on your machine.

But I you work with a post processor your simply can write M6 for automatic tool change und use M106 for manual tool change