diff --git a/app/blocks/power_ups/weather.js b/app/blocks/power_ups/weather.js
index de6e3e7..49f26d2 100644
--- a/app/blocks/power_ups/weather.js
+++ b/app/blocks/power_ups/weather.js
@@ -1,12 +1,12 @@
 import weatherMixin from "./weather_mixin.js"
 
 
-
 const
   { keyToLabel, HELP_TEXT_BY_PROP: propText } = weatherMixin,
   propLines = (prefix, props) =>
     props.map(prop => `${prefix}- \`${keyToLabel(prop)}\`: ${propText[prop].description}`).join("")
 
+/** @type {import('#types').BlockDefinitionRaw} */
 export default {
   type: "weather",
   bytecodeKey: "weather",
@@ -36,6 +36,7 @@ export default {
         weatherLocationOptions.unshift([ "Select Location", "" ])
       }
 
+      // @ts-ignore
       block.replaceDropdownOptions("POWER_UP_ID", weatherLocationOptions)
 
       // skip the rest if we're in the toolbox
@@ -46,16 +47,16 @@ export default {
         // nope out for insertion markers
         if(block.isInsertionMarker()) { return }
 
-        // auto-disable block, if necessary
+        // @ts-ignore auto-disable block, if necessary
         block.setEnabledByLocation()
 
         // react to incoming forecast data
         const unobserve = observeData('currentWeatherByLocation', (newData = {}) => {
           // if this block is disposed, clean up this listener
           if (block.isDisposed()) { unobserve(); return }
-          // update the reference to the injected/updated extension data
+          // @ts-ignore update the reference to the injected/updated extension data
           block.currentWeatherByLocation = newData
-          // re-run the things that use the data
+          // @ts-ignore re-run the things that use the data
           block.refreshPropertyOptions({})
         })
       }, 1)
diff --git a/app/types.js b/app/types.js
index cae964e..2a29686 100644
--- a/app/types.js
+++ b/app/types.js
@@ -11,6 +11,8 @@
 /**
  * @typedef {object} BlockExtensionFunctionInjectable
  * @prop {Blockly.Block} block
+ * @prop {function} observeData
+ * @prop {object} data
  */
 
 /**
@@ -22,6 +24,14 @@
  * @typedef {Object.<string, BlockExtensionFunction>} BlockExtensions
  */
 
+/**
+ * @typedef {string|object} BlocklyMixin
+ */
+
+ /**
+ * @typedef {BlocklyMixin[]} BlockMixins
+ */
+
 /**
  * @callback BlockGenerator
  * @param {Blockly.Block} block
@@ -66,13 +76,16 @@
  * @prop {string=} primaryCategory For blocks appearing in multiple categories,
  *   this property determines which menu this block will appear under in the
  *   docs.
+ * @prop {boolean=} ioPlus Indicates this block requires an IO+ account.
  * @prop {string} description Markdown documentation for this block. The first
  *   line will be automatically set as the Block's tooltip.
  * @prop {BlockConnections} connections
  * @prop {BlockExtensions=} extensions
+ * @prop {BlockMixins=} mixins
  * @prop {string} template
  * @prop {object=} fields
  * @prop {object=} inputs
  * @prop {BlockGenerators=} generators
  * @prop {BlockRegenerators=} regenerators
+ * @prop {object=} docOverrides
  */