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Agent Graph Engineering, Part 1: The Stack, and Why Each Piece Is There

This story is from 2026-10-23. It is preserved in the archive; the latest stories are on the live feed.

TL;DR The stack is Python, Pydantic AI for agents, LangGraph for the flow, chanx for typed streaming WebSockets and a generated frontend contract, OpenTelemetry into a trace store you own, pytest with a mocked LLM for fast tests, and real-model evals for regressions. Business logic stays in a separ…

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  1. 2026-10-23 04:26 · DEV Community — AI
    Agent Graph Engineering, Part 1: The Stack, and Why Each Piece Is There

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