Shared coding conventions allow teams to collaborate efficiently. This rule checks that all placeholder selector names match a provided regular expression.

## Noncompliant Code Example

With format `^[a-z][-a-z0-9]*$`:

    #context a%EXTREME { /* Noncompliant: Should be 'extreme' instead for example */
      color: green;
    }

    #context a%EX_TREME { /* Noncompliant: Should be 'ex-treme' instead for example */
      color: green;
    }

## Compliant Solution

With format `^[a-z][-a-z0-9]*$`:

    #context a%extreme {
      color: green;
    }

    #context a%ex-treme {
      color: green;
    }