Why doesn't regex validate?

Question

Regular Expressions

There is such a regular
(SM-\d{1,}|Infrastructure|FIX) - \S.*

expression I try to send such a value
SM-38 - [FIX] - fix code style

but it does not accept

Answer 1

(SM-\d+ - \[(Infrastructure|FIX)\]) - \S.*
https://regex101.com/r/FAaQ5b/1
In general, you did not provide enough cases for a normal answer.
Maybe this is more suitable for you:
(SM-\d+ - )?(\[(Infrastructure|FIX)\] - )?\s*.*
Here the ticket-id is optional and the commit type is optional and in extreme cases at least the text will be matched.
Although if a validator, then you probably want to. so that all commits are tied to tickets and marked with a type.

Answer 2

Because this is

SM-38 - [FIX] - fix code style
     ^^^

does not match regular