Old hardcoded IDs (seer, forge, echo, helm, quill) replaced with YAML-defined IDs (orchestrator, researcher, coder, writer, memory, experimenter). Added test that old names are explicitly rejected.
Old hardcoded IDs (seer, forge, echo, helm, quill) replaced with YAML-defined IDs (orchestrator, researcher, coder, writer, memory, experimenter). Added test that old names are explicitly rejected.