Minimum 10 on NPC rolls

I've flavored a rogue NPC and I'm trying to reenact Reliable Talent on them. I've tried editing the Attributes and Abilities, specifically "stealth_roll" and I can't figure out what I'm doing wrong. I put: @{wtype}&{template:simple} {{rname=^{stealth-u}}} {{mod=@{stealth_bonus}}} {{r1=[[{@{d20},0d20+10}k1+5[Proficiency]+10[Mods]@{pbd_safe}]]}} {{always=1}} {{r2=[[{@{d20},0d20+10}k1+5[Proficiency]+10[Mods]@{pbd_safe}]]}} {{global=@{global_skill_mod}}} @{charname_output} in the attribute. Any help is appreciated, thanks!

Your macro looks fine - I think your problem is the hyperactive immune response from the Roll20 5e sheet. A heap of Attributes on the NPC sheet will recalculate their contents each time you click on them, including things like skill rolls, crit damage - mostly things that don't appear in the UI as editable. The easiest solution is a macro - just change all your @{attribute} calls to @{selected|attribute} calls, or even @{npc_name|attribute} calls if it's only the one NPC who will be needing to roll the macro. You could also run the NPC with the normal PC sheet, as it has Reliable Talent built in.