HD 260655 is a cool M-dwarf (about 0.44 solar masses, 3,803 K, 0.44 solar radii), 10.0 light-years from Earth. HD 260655 b is a 2.1-Earth-mass planet, with an orbital period of 2.8 days, at 0.029 AU from its star, and an equilibrium temperature near 709 K, discovered in 2022 via transit. HD 260655 c is a 3.1-Earth-mass planet, with an orbital period of 5.7 days, at 0.047 AU from its star, and an equilibrium temperature near 557 K, discovered in 2022 via transit. Mutual gravitational tugs between the planets can slowly reshape their orbits, preserving clues to the system's assembly.