no-handlebars-compile.js

module.exports = function() {};

module.exports.prototype = {
  configure: function(noHandlebarsCompileExpression) {
    this._isEnabled = noHandlebarsCompileExpression;    

  },

  getOptionName: function() {
    return 'noHandlebarsCompile';
  },

  check: function(file, errors) {
    if (!this._isEnabled) {
      return;
    }
    file.iterateNodesByType('CallExpression', function(node) {
      var lastCalleeToken = file.getLastNodeToken(node.callee);
      if (lastCalleeToken.value === 'compile') {
        var calleeObject = node.callee.object && node.callee.object.property;
        if (calleeObject && calleeObject.name === 'Handlebars') {
          errors.add(
            'Don\'t call the Handlebars compile',
            lastCalleeToken.loc.start
          );

        }
      }
    });
  }
};

snippet of .jscsrc

{
    "additionalRules": [ "tools/jscs-rules/*.js" ],
    "excludeFiles": ["tests/fixtures/*"],
    "noHandlebarsCompile": true, // -> will change to true when we excise remaining em.handlebars.compile
    "usePrecompileTemplateProperly": true,
    ...
}

use-precompile-correctly.js

module.exports = function() {};

module.exports.prototype = {
  configure: function(usePrecompileProperly) {
    this._isEnabled = usePrecompileProperly; 
  },

  getOptionName: function() {
    return 'usePrecompileTemplateProperly';
  },

  check: function(file, errors) {
    if (!this._isEnabled) {
      return;
    }
    file.iterateNodesByType('CallExpression', function(node) {
      if (node.callee.name === 'precompileTemplate' && node.arguments[0] && node.arguments[0].type !== 'Literal') {
          errors.add(
            'precompileTemplate must be called with a literal expression to work properly\ne.g precompileTemplate("{{foo}}"',
            node.loc.start
          );
      }
    });
  }
};