pstack 0.15.0 is here! this release contains mainly token usage improvements (between 3 to 11% savings depending on how many skills are loaded by pstack in your session), removing some stray semicolons and emdashes so pstack skills aren't a bad influence, and lots of mannered prose removals (thanks Anthropic for the guide!), along with 2 new principles: • attack the premise: inspired by @VictorTaelin's recent experience with agents never questioning the premise • test behavior, not…