We have a fair few tasks of the form "Linter X cannot be customized" (usually refer to the message severities). See, for example:
- {D10498}
- {D12034}
- D11657#133770
- D10741#136127
The issue here is that `ArcanistLinter` has too much control over the `ArcanistLintMessage`s that it produces (specifically, it sets the severity explicitly).