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Engineering Insights

Why We Deleted Our MCP Server and Rebuilt It — Abhi Arya, Reducto

AI Engineer · Oct 08, 2026 · Engineering Insights

Reducto rebuilt their MCP server around agent-first architecture, framing it as an architectural problem not a prompt problem

“Agent-based software is inherently an architectural problem.”

Reducto, which has processed 3 billion documents for clients including Harvey and Scale AI, shares hard-won lessons on building agent-first infrastructure. The core thesis is that agent software quality is an architectural question — specifically, who absorbs the cost of agent errors — not a prompt or API wrapper problem. The talk introduces a framework of three architectural modes (auto, user-priority, and a third not yet shown) for thinking about agent accountability in production systems.

MCP agent-architecture document-processing production-AI unstructured-data

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