Memory, approvals, sandboxing and rollback separate a production system from a demo. Three of them are configuration in your workflow tool. The fourth is architecture.
Document parsing on n8n is commoditized. The value is the decision before the build: throughput threshold, build vs buy a parser, and self-hosting for compliance.
Your agents answer from whatever the retriever finds, and too often that is last quarter's truth. I build the context layer they answer and act from: a temporal knowledge graph that keeps every fact with its source and the time it held, reads with each person's own permissions, and writes nothing without a person's approval. On your own tenant, billed by the hour, step by step.