The mark is a slingshot's fork with the stone just above it, already let go: mark.svg, drawn on a 24 by 28 grid. mark.png is the same mark on paper at 512px, for avatars.
Rules
Draw the mark in ink on paper, or in paper on ink. Because the mark is part of the type system, not a colour moment.
Never recolour, rotate, stretch or outline the mark. Because each change reads as a different brand.
Keep it at least 12px tall on screen. Because below that the stone merges into the fork.
Give it clear space of at least half its height on every side. Because the mark is small and loses its shape when text crowds it.
Pair it with the word "Slingshot" in Geist, never in the serif. Because the serif is reserved for the statement.