remove unnecessary directories

The following directories a unnecessary in the codeigniter4/framework package:
- app
- public
- writable

No it's not. As we may have updated the standard files in App, Public or the directory structure in writable. So you need to be able to update your own files from those templates.

It's also the base for the manual download.

No it's not. As we may have updated the standard files in App, Public or the directory structure in writable. So you need to be able to update your own files from those templates.

It's also the base for the manual download.

CodeIgniter 4 has two repos, why not using the codeigniter4/CodeIgniter4 for the manual download?

As we may have update the App folder, with e.g. new Config files you would not be able to get them (if they where removed). That's why they need to be there for Composer* installation as well.

* You are installing in that way, right?

As we may have update the App folder, with e.g. new Config files you would not be able to get them (if they where removed). That's why they need to be there for Composer* installation as well.

* You are installing in that way, right?

doesn't make sense at all... . Because of one future update, we need the app folder and the other directories and files?

\vendor\kint-php
\vendor\laminas

a copied to (not moved)

vendor\codeigniter4\framework\system\ThirdParty

download version ok, but not if you use a package manager.

Yep, how would you else get the new files, if they never where downloaded?