  We demonstrate microwave-mediated distant magnon-magnon coupling on a
superconducting circuit platform, incorporating chip-mounted single-crystal
Y$_3$Fe$_5$O$_{12}$ (YIG) spheres. Coherent level repulsion and dissipative
level attraction between the magnon modes of the two YIG spheres are
demonstrated. The former is mediated by cavity photons of a superconducting
resonator, and the latter is mediated by propagating photons of a coplanar
waveguide. Our results open new avenues towards exploring integrated hybrid
magnonic networks for coherent information processing on a quantum-compatible
superconducting platform.
