Claude Code's Cross-Session Messaging Points to a Coordination Gap in Multi-Agent Dev

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Running multiple AI coding agents in parallel is straightforward, but safely combining their work remains a largely unsolved workflow problem. One agent may alter an API while another writes tests against its old version, and a third may silently edit a shared configuration file, leaving developers to manually track dependencies and resolve conflicts. Claude Code has introduced cross-session messaging, session discovery, and hook-based tool interception on local machines, providing low-level primitives for agent coordination. However, higher-level concerns such as dependency ownership, conflict negotiation, and structured handoffs between sessions are not yet addressed by any dedicated tool. The proposed solution is a lightweight local control desk where each agent declares its goal, target files, and outputs, enabling visible dependency tracking and file-lease checks before collisions reach code review.

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