why is brew always bundled with xcode command line tools, often it's not required.

[zzz6519003]

Output of brew config

HOMEBREW_VERSION: 3.6.21
ORIGIN: https://github.com/Homebrew/brew
HEAD: 932d2cf3b77c9439a57b6a43577fc8d3b6399a62
Last commit: 7 days ago
Core tap origin: https://github.com/Homebrew/homebrew-core
Core tap HEAD: c5380128b51e4b07a8c63f1aeb9c12b518f5df88
Core tap last commit: 17 hours ago
Core tap branch: master
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 4
https_proxy: http://127.0.0.1:4780
Homebrew Ruby: 2.6.8 => /usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.6.8_1/bin/ruby
CPU: quad-core 64-bit kabylake
Clang: 11.0.0 build 1100
Git: 2.29.2 => /usr/local/bin/git
Curl: 7.64.1 => /usr/bin/curl
macOS: 10.15.7-x86_64
CLT: 11.0.0.33.17
Xcode: 12.3

Output of brew doctor

Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: A newer Command Line Tools release is available.
Update them from Software Update in System Preferences.

If that doesn't show you any updates, run:
  sudo rm -rf /Library/Developer/CommandLineTools
  sudo xcode-select --install

Alternatively, manually download them from:
  https://developer.apple.com/download/all/.
You should download the Command Line Tools for Xcode 12.4.


Warning: Some installed kegs have no formulae!
This means they were either deleted or installed manually.
You should find replacements for the following formulae:
  llvm@6

Warning: Some installed formulae are deprecated or disabled.
You should find replacements for the following formulae:
  ghc@8.8

Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected dylibs:
  /usr/local/lib/ss_conn_lib2.dylib

Warning: You have unlinked kegs in your Cellar.
Leaving kegs unlinked can lead to build-trouble and cause formulae that depend on
those kegs to fail to run properly once built. Run `brew link` on these:
  python@3.10
  jupyterlab

Warning: You are using macOS 10.15.
We (and Apple) do not provide support for this old version.
It is expected behaviour that some formulae will fail to build in this old version.
It is expected behaviour that Homebrew will be buggy and slow.
Do not create any issues about this on Homebrew's GitHub repositories.
Do not create any issues even if you think this message is unrelated.
Any opened issues will be immediately closed without response.
Do not ask for help from MacHomebrew on Twitter.
You may ask for help in Homebrew's discussions but are unlikely to receive a response.
Try to figure out the problem yourself and submit a fix as a pull request.
We will review it but may or may not accept it.


Warning: Homebrew's "sbin" was not found in your PATH but you have installed
formulae that put executables in /usr/local/sbin.
Consider setting your PATH for example like so:
  echo 'export PATH="/usr/local/sbin:$PATH"' >> ~/.zshrc

Warning: Your Xcode (12.3) is outdated.
Please update to Xcode 12.4 (or delete it).
Xcode can be updated from the App Store.


Warning: Some installed formulae are missing dependencies.
You should `brew install` the missing dependencies:
  brew install openssl@3

Run `brew missing` for more details.

Description of issue

why is brew always bundled with xcode command line tools, often it's not required.

[SMillerDev]

It's definitely always required. Brew depends on the tools the CLT provides

[zzz6519003]

which i think not nessasary, what tools?

[SMillerDev]

Python for one, all of the system headers and dylybs it provides. But if you think it can work without you're always welcome to make a pull request.