zodios는 ZodError를 ZodiosError.cause에 담아 던진다¹ — instanceof z.ZodError로는 안 잡힌다.

if (err instanceof ZodiosError && err.cause instanceof ZodError) {
  console.log(fromZodError(err.cause).toString())
}

• isErrorFromAlias not finding errors when uri have undefined params · Issue #402 · ecyrbe/zodios
• https://www.jacobparis.com/content/type-safe-env

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Footnotes

1. zodios zod-validation.plugin.ts: 응답 검증 실패 시 throw new ZodiosError(… config, response.data, parsed.error) — 네 번째 인자가 cause다. ↩