diff --git a/src/core/plugins/oas3/index.js b/src/core/plugins/oas3/index.js
new file mode 100644
index 00000000..5135063c
--- /dev/null
+++ b/src/core/plugins/oas3/index.js
@@ -0,0 +1,20 @@
+// import reducers from "./reducers"
+// import * as actions from "./actions"
+import * as selectors from "./selectors"
+// import * as wrapActions from "./wrap-actions"
+
+export default function(system) {
+  return {
+    components: {
+
+    },
+    statePlugins: {
+      spec: {
+        // wrapActions,
+        // reducers,
+        // actions,
+        selectors
+      }
+    }
+  }
+}
diff --git a/src/core/plugins/oas3/selectors.js b/src/core/plugins/oas3/selectors.js
new file mode 100644
index 00000000..63828957
--- /dev/null
+++ b/src/core/plugins/oas3/selectors.js
@@ -0,0 +1,43 @@
+import { createSelector } from "reselect"
+// import { sorters } from "core/utils"
+// import { fromJS, Set, Map, List } from "immutable"
+
+const DEFAULT_TAG = "default"
+
+const state = state => {
+  return state || Map()
+}
+
+// export const specJson = createSelector(
+//   state,
+//   spec => spec.get("json", Map())
+// )
+//
+// export const specResolved = createSelector(
+//   state,
+//   spec => spec.get("resolved", Map())
+// )
+//
+// export const spec = state => {
+//   let res = specResolved(state)
+//   if(res.count() < 1)
+//     res = specJson(state)
+//   return res
+// }
+//
+// export const findDefinition = ( state, name ) => {
+//   return specResolved(state).getIn(["definitions", name], null)
+// }
+//
+// export const definitions = onlyOAS3(createSelector(
+//   spec,
+//   spec => spec.getIn(["components", "schemas"]) || Map()
+// ))
+
+// helpers
+
+function onlyOAS3(selector) {
+  return ( state ) => ( thing ) => {
+    return selector
+  }
+}
diff --git a/src/core/presets/apis.js b/src/core/presets/apis.js
index 3d4b5961..14afc627 100644
--- a/src/core/presets/apis.js
+++ b/src/core/presets/apis.js
@@ -1,4 +1,5 @@
 import BasePreset from "./base"
+import OAS3Plugin from "../plugins/oas3"
 
 // Just the base, for now.
 
@@ -6,5 +7,6 @@ export default function PresetApis() {
 
   return [
     BasePreset,
+    OAS3Plugin
   ]
 }