custom-plugins.md

+KSS has a plugin architecture. Apart from the core that is
+parsing the .kss files and binding them to nodes, communicating
+with the server and executing the KSS commands, almost every
+component, incuding actions, events, parameter providers,
+selectors is designed to be pluggable.  
+
+The KSS plugin API makes it possible to create all these
+components and register them to KSS.
+
+The plugin development is a seldom needed and specialized task.
+To be able to do it, you must be familiar with Javascript and
+KSS.
+
+
+Creating an action
+==================
+
+An action is a Javascript function that is called when the action
+is executed. It receives the node and a parameter object::
+
+```js
+    kss.registerActionProvider('replaceInnerHTML', function(node, params) {
+        node.innerHTML = params.html;
+    });
+```
+
+Creating a parameter provider
+=============================
+
+A parameter provider is a Javascript function that is called for each
+parameter for an action. It receives the node and all arguments::
+
+```js
+    kss.registerParameterProvider('nodeAttr', function(node, name) {
+        return node.getAttribute(name);
+    });
+```
+
+Creating a custom event binder
+==============================
+
+TODO