A no-cap, no trim, no tailor instance

I have already specified;
opsz 144 wdth 100 wght 900
To be caped at;
opsz 144 wdth 100 wght 900 GRAD max
And
opsz 144 wdth 100 wght 900 XTRA min

...meaning that the GRAD and XTRA axes have no safe room to move To add weight via GRAD, or narrow any further with XTRA.

This is also true at:
opsz 144 wdth 100 wght 900, YTUC min,
opsz 144 wdth 100 wght 900,YTLC min,
opsz 144 wdth 100 wght 900, YTFI min
opsz 144 wdth 100 wght 900, YOPQ mIn

Likely too,
opsz 144 wdth 100 wght 900, YTDE min,
opsz 144 wdth 100 wght 900, YTAS min,

By “Min” I mean - shorter - ascenders or descenders, than the defaults.