1. nature can add methods to built-in types, example

fn int.to_string() { }

I haven't considered whether union types can add methods, so I tested it, and it seems to be possible, but this may cause some unexpected behavior, so maybe I should disable this possibility for now.

type test_t = int|null

fn test_t.hello() { println('hello world') }

2. Enum support is planned. I plan to use type declarations. Why hasn't enum been added yet? Nature has adopted a conservative syntax design, and I hope to hear more opinions and avoid affecting existing functionality as much as possible when adding syntax features.

type weekly = enum {}

So methods can be added to enums.

fn weekly.found() { }

3. UTF-8 should be solvable via a library. I haven't thought much about UTF-8 yet, but if it can enhance nature's usability, I'll implement it as soon as possible. Usability is a key focus for nature moving forward.

4. Select{} timeout handling does require a special timer channel, which will be addressed in the standard library. Currently, it can only be handled via ch.try_recv() and ch.try_send(), which do not block the channel.

5. Actually, this is the first time I've heard of the XDG standard. I will study and understand the specification.

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I am not an experienced programming language designer, so thank you for your questions. I will carefully consider them.