Interesting new research from Meta Superintelligence Labs It discusses how reward hacking affects coordination in multi-agent coding systems. Coding agents on a team share code, memory, and plans, so a reward hack one agent learns gets passed to the others. The paper traces this through three channels. Hacks move through shared code, through shared memory, and across roles through natural-language plans. Agents on small open-weight models can induce hacking in stronger closed-weight agents.…