WorkflowDefinition no longer carries 'name' — name is a registry-level
concern, not a bundle property. Also fixed all missing threadId in test
fixtures to match the updated ThreadContext type.
小橘 <xiaoju@shazhou.work>
The package only contains createLlmAdapter (OpenAI chat → AgentFn),
which is an agent adapter, not a role. Aligns with workflow-agent-cursor
and workflow-agent-hermes naming.
xiaoju