improve readme

README.md

@@ -1,3 +1,42 @@
 # NodeIDs
 
 Standard node IDs for layers in Geode.
+
+Whenever you hook a layer in Geode and want to add stuff to it, in order to preserve compatability with other mods, you should always use node IDs rather than `objectAtIndex` calls. You need to depend on this mod to add the IDs.
+
+For more information, [read the docs page on IDs & Layouts](https://docs.geode-sdk.org/tutorials/nodetree).
+
+## Using as a dependency
+
+Add the mod to your `mod.json`:
+
+```json
+{
+    "dependencies": [
+        {
+            "id": "geode.node-ids",
+            "version": "v1.5.0",
+            "importance": "required"
+        }
+    ]
+}
+```
+
+**All the hooks in this mod have very low priority and as such should always be automatically run before your hooks.** However, if you want to ensure that IDs have been provided for your modified layer, call `NodeIDs::provideFor` (Geode function, not from this mod):
+
+```cpp
+#include <Geode/modify/EditorUI.hpp>
+
+using namespace geode::prelude;
+
+class $modify(EditorUI) {
+    bool init(LevelEditorLayer* lel) {
+        if (!EditorUI::init(lel))
+            return false;
+
+        NodeIDs::provideFor(this);
+
+        return true;
+    }
+};
+```