suggestion: Consider adding more specific error handling

While the simplification of the ModLoaderVersionVisitor is good for readability, consider adding more specific error messages for different cases to maintain detailed error reporting.

if value == "*" {
    Ok(ForgeModVersion::Any)
} else if value.is_empty() {
    Err(E::custom("Empty version string"))
} else if !value.chars().all(|c| c.is_ascii_digit() || c == '.' || c == '-') {
    Err(E::custom("Invalid characters in version string"))
} else {
    Ok(ForgeModVersion::Specific(value.to_string()))
}

suggestion: Consider using an enum for error types instead of hardcoded strings

Using an enum for error types would make the code more maintainable and allow for better error matching downstream. This can improve error handling and make it easier to add new error types in the future.

pub enum UnzipError {
    IoError(std::io::Error),
    ZipError(zip::result::ZipError),
    InvalidArchive,
    ExtractionFailed,
}

issue (bug_risk): Implement CurseCategory::from_id properly or add a TODO comment

The current implementation creates a dummy category with hardcoded values. This could lead to incorrect data being used. Either implement this function properly or add a TODO comment if it's intentionally left for future work.

suggestion: Consider using #[derive(Deref, DerefMut)] for CurseResponse

You can simplify the Deref implementation by using #[derive(Deref, DerefMut)] from the derive_more crate. This would make the code more concise and easier to maintain.

use derive_more::{Deref, DerefMut};

#[derive(Deref, DerefMut)]
pub struct CurseResponse<T> {
    #[deref]
    #[deref_mut]
    pub data: T,
}

issue (complexity): Consider refactoring the visit_str method to improve readability and maintainability.

The changes to the visit_str method in ModLoaderVersionVisitor have increased complexity and reduced readability. Consider refactoring this section to improve clarity while maintaining the new functionality. Here's a suggested approach:

fn visit_str<E>(self, value: &str) -> Result<ForgeModVersion, E>
where
    E: serde::de::Error,
{
    match value {
        "*" => Ok(ForgeModVersion::Any),
        v if v.starts_with('[') => Ok(ForgeModVersion::VersionRange(
            v.parse().map_err(serde::de::Error::custom)?,
        )),
        v => Ok(ForgeModVersion::SpecificVersion(
            v.parse().map_err(serde::de::Error::custom)?,
        )),
    }
}

This refactored version:

1. Uses a match expression for better readability
2. Handles the "*" case first
3. Checks for version ranges starting with '['
4. Treats all other cases as specific versions

This approach simplifies the logic while maintaining the new behavior. It also removes the commented-out code, reducing noise in the codebase. If there are specific edge cases that this doesn't cover, consider adding them as additional match arms with clear comments explaining their purpose.