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What LangGraph Actually Builds: Runnables, Channels, Bubble-Up, Agents and Deep Agents

This story is from 2026-10-11. It is preserved in the archive; the latest stories are on the live feed.

I spent the weekend digging through LangGraph's source code, trying to understand what actually happens beneath the abstractions. These are my notes, the experiments I ran, and the mental model I ended up with. The thing that surprised me most is how small the core idea is. A graph, a ReAct agent a…

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  1. 2026-10-11 15:17 · DEV Community — AI
    What LangGraph Actually Builds: Runnables, Channels, Bubble-Up, Agents and Deep Agents

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