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The Pitfalls of Silent Schema Drift: Metaprogramming Strict Validation in Pydantic v2 (and Why Our CLI Broke in CI)

The Pitfalls of Silent Schema Drift: Metaprogramming Strict Validation in Pydantic v2 (and Why Our CLI Broke in CI) By default, Pydantic operates in a permissive, "lax" mode. While this makes data deserialization convenient—silently coercing "123" into 123 or "true" into True —it introduces a insid…

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  1. 2026-11-12 08:52 · DEV Community — AI
    The Pitfalls of Silent Schema Drift: Metaprogramming Strict Validation in Pydantic v2 (and Why Our CLI Broke in CI)

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