Worked on the NousResearch/hermes-agent repository to address a concurrency issue in the Kanban task management system. Focused on backend development using Python and SQL, the work enforced a parent-completion invariant to prevent child tasks from being claimed before their parent tasks finished, eliminating a race condition that could disrupt task order. Introduced a concurrency stress test to simulate high-contention scenarios, ensuring the new gating logic around claim and unblock operations maintained reliability and correctness. This approach improved database consistency and task progression under load, aligning the Kanban flow with business requirements for predictable execution and robust concurrency control in production environments.