Pydantic's Samuel Colvin: Graph libraries are a mistake, your code IS the graph
samuelcolvin · x · 2026-10-14
- Samuel Colvin (Pydantic) responds to the "graphs and loops over prompting" debate with a contrarian take: graph libraries are a mistake; your code is the graph.
- He argues humans writing code is going away; developers' harder job becomes problem formulation — picking the metrics agents optimize and the constraints they respect.
- The technical stack: type safety from type hints, parallelism from async, and durable execution via Temporal outside the sandbox and Monty inside it.
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