Buy the orchestration layer of your agentic operating system if your agents mostly drive SaaS apps whose code you do not own — Make or ServiceNow will get you further in a quarter than a bespoke scheduler will. Build on LangGraph when the agents live inside your own codebase, your state model is unusual, or compliance requires auditable deterministic steps you can read in a diff. The one option that loses for almost everybody is writing coordination glue from scratch: the failures at this stage ...