core-dev

Development guide for the lemline-core module. Use when working with workflow execution (orchestrators, processors), node tree navigation (Node, NodePosition), task states (TaskState, WorkflowCommand, WorkflowEvent), expression evaluation (JQ, scope), error handling (TryTask, retry, catch), parallel execution (Fork), or DSL parsing. Covers the step-by-step execution model, exception-driven control flow, and stateless architecture.