What's a clean and code-compliant way to terminate Cat6 cables at a wall, where a rack mount patch panel will be in front of it?
Riser cables are not "fragile", for one thing. 65 of them in a bundle are not even remotely fragile, as a unit, unless "hack with an axe" is your fragility standard. Rack patch panels (punchdown style) are specifically intended to terminate riser (or plenum) type solid cables without the need to put a plug onto the cable (where repeated use might flex the wires too much and break them; though this is unlikely to be an issue in the average house.)

Low voltage cables can have all sorts of things that look like "violations" if you were to do that with power wiring, and are not in low voltage.

You can simply have a low voltage cable passthough, (a pretty hole in the wall) leave the cables hanging until the rack shows up, and terminate them into a rackmount patch panel designed for the purpose. This passes code &amp; inspections for commercial occupancies, which are generally somewhat harsher than residential.

You could also run them into a "between the studs" "structured wiring" box that had patch panel ports on the door, which seems to be the way you are thinking, but I'm not finding that as a common option so I think you'd be modifying the door for that purpose yourself. Most "media wiring boxes" appear to be oriented towards hiding it all - I suppose you could use one of those and have the door open all the time once the rack is in place.

You will probably have to get 72 ports worth of patch to (efficiently) terminate 65 cables, as 12 &amp; 24 are the usual units for patchbays.

Resist the urge to cut everything as short as possible - well-designed cable installations will have a deliberate loop hung on the wall (or sometimes in the wall) to allow for "moves, adds and changes."