The article expressly suggests not wrapping/embedding those errors but instead putting the errors into context. That suggestions starts with the sentence "Defin

The article expressly suggests not wrapping/embedding those errors but instead putting the errors into context. That suggestions starts with the sentence "Define errors in terms of the problem, not a solution" and explicitly shows a wrapping as an anti-pattern then lays out the better solution. Note that the author's solution serializes the underlying error in some cases to avoid leaking it as a dependency. You can use ? when you implement From (to get an automatic Into) which which can be as easy as a #[from] annotation with thiserror. You can manually implement From instead of inlining the map_err if you so choose. Then you are only ever using map_err to pass additional contextual information. You usually end up using ? after map_err or directly returning the result.