Persistent dependency graph task factory for DeepSeek Harness

Key features

• Durable task graphs and recurring Agent work for DeepSeek Harness
• dsh-factory turns the ordinary DSH Session workflow into a durable local task factory.
• People can capture work from New Session, models can build dependency graphs directly, and a lease-elected scheduler runs eligible nodes through native DSH Agents without introducing a second Agent loop, tool registry, or conversation store.