Genre promise (what your book promises on the first pages)
Literary fiction promises: (1) a distinctive voice (the way sentences think), (2) deep interiority (what your characters cannot stop thinking about), and (3) theme as experience rather than sermon. Early chapters should show how the protagonist’s perception works. If the book later explores loss, you should first show what “loss” looks like in routine thoughts: the avoidance gesture, the detail someone can’t touch, the memory that returns at inconvenient times. The promise is kept when scene goals and sentence choices keep exposing the same underlying question—while characters remain fallible and specific.