Proof of concept

.jshintrc

@@ -28,5 +28,5 @@
   "white": false,
   "eqnull": true,
   "esnext": true,
-  "unused": true
+  "unused": "vars"
 }

index.js

@@ -1,6 +1,57 @@
 /* jshint node: true */
 'use strict';
 
+var Filter = require('broccoli-filter');
+var marked = require('marked');
+marked.setOptions({
+  gfm: true,
+  sanitize: true
+});
+
+function TemplateCompiler(inputNode, options) {
+  if (!(this instanceof TemplateCompiler)) {
+    return new TemplateCompiler(inputNode, options);
+  }
+
+  options = options || {};
+  Filter.call(this, inputNode, options);
+  this.compile = marked;
+}
+
+TemplateCompiler.prototype = Object.create(Filter.prototype);
+TemplateCompiler.prototype.constructor = TemplateCompiler;
+TemplateCompiler.prototype.extensions = ['md'];
+TemplateCompiler.prototype.targetExtension = 'hbs';
+
+TemplateCompiler.prototype.processString = function(string, relativePath) {
+  return this.compile(string).replace(/{/g, '{');
+};
+
 module.exports = {
-  name: 'ember-cli-markdown-compiler'
+  name: 'ember-cli-markdown-compiler',
+
+  isDevelopingAddon: function() {
+    return true;
+  },
+
+  setupPreprocessorRegistry: function(type, registry) {
+    registry.add('template', {
+      name: 'ember-cli-markdown-compiler',
+      ext: ['md'],
+      toTree: function(tree) {
+        return TemplateCompiler(tree);
+      }
+    });
+
+    if (type === 'parent') {
+      this.parentRegistry = registry;
+    }
+  },
+
+  included: function(app) {
+    this._super.included.apply(this, arguments);
+
+    this.setupPreprocessorRegistry('parent', app.registry);
+  }
+
 };

package.json

@@ -1,7 +1,7 @@
 {
   "name": "ember-cli-markdown-compiler",
-  "version": "0.0.0",
-  "description": "The default blueprint for ember-cli addons.",
+  "version": "1.0.0",
+  "description": "Build-time Markdown compiler for template.md -> template.hbs",
   "directories": {
     "doc": "doc",
     "test": "tests"
@@ -41,9 +41,15 @@
     "ember-addon"
   ],
   "dependencies": {
-    "ember-cli-babel": "^5.1.3"
+    "broccoli-filter": "^1.2.2",
+    "ember-cli-babel": "^5.1.3",
+    "marked": "0.3.5"
   },
   "ember-addon": {
-    "configPath": "tests/dummy/config"
+    "configPath": "tests/dummy/config",
+    "before": [
+      "ember-cli-htmlbars"
+    ]
+
   }
-}
+}