an-TUM-bra — in eclipse geometry, the region beyond the tip of the umbra. From inside it, the blocking body appears entirely contained within the disc of the light source: a ring of light around every obstacle. Nothing ahead outsizes the star.
Antumbra is a desktop app for long-horizon work with AI agents: a fixed north star, courses plotted leg by leg, agents that make way between fixes.
A place to stand for the long view.
Early development. Nothing to install or run yet.