diff --git a/src/main.ts b/src/main.ts
index bd762c4..3b29f3e 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,5 +1,34 @@
 import { ErrorMapper } from "utils/ErrorMapper";
 
+declare global {
+  /*
+    Example types, expand on these or remove them and add your own.
+    Note: Values, properties defined here do no fully *exist* by this type definiton alone.
+          You must also give them an implemention if you would like to use them. (ex. actually setting a `role` property in a Creeps memory)
+
+    Types added in this `global` block are in an ambient, global context. This is needed because `main.ts` is a module file (uses import or export).
+    Interfaces matching on name from @types/screeps will be merged. This is how you can extend the 'built-in' interfaces from @types/screeps.
+  */
+  // Memory extension samples
+  interface Memory {
+    uuid: number;
+    log: any;
+  }
+
+  interface CreepMemory {
+    role: string;
+    room: string;
+    working: boolean;
+  }
+
+  // Syntax for adding proprties to `global` (ex "global.log")
+  namespace NodeJS {
+    interface Global {
+      log: any;
+    }
+  }
+}
+
 // When compiling TS to JS and bundling with rollup, the line numbers and file names in error messages change
 // This utility uses source maps to get the line numbers and file names of the original, TS source code
 export const loop = ErrorMapper.wrapLoop(() => {
diff --git a/src/types.d.ts b/src/types.d.ts
deleted file mode 100644
index 00727b9..0000000
--- a/src/types.d.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-// example declaration file - remove these and add your own custom typings
-
-// memory extension samples
-interface CreepMemory {
-  role: string;
-  room: string;
-  working: boolean;
-}
-
-interface Memory {
-  uuid: number;
-  log: any;
-}
-
-// `global` extension samples
-declare namespace NodeJS {
-  interface Global {
-    log: any;
-  }
-}