Pydantic creator to library devs: do not set upper bounds on dependencies
samuelcolvin · x · 2026-10-21
Samuel Colvin, creator of Pydantic, used the occasion of a (presumably another) ecosystem incident to remind library developers: do not set upper bounds on your dependencies. Upper bounds on libraries create resolver conflicts and block ecosystem-wide upgrades — a stance long echoed by official guides like the Cargo book.
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