diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3408405..6acfdc0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 - Removed the `__sdk.js` developer file from the respoitory.
+- Fixed the types for runAirtableScript.
 
 ## [0.0.2] - 2025-01-09
 
diff --git a/README.md b/README.md
index 185bcec..58b5855 100644
--- a/README.md
+++ b/README.md
@@ -118,6 +118,47 @@ const result = await runAirtableScript({
 
 You can pass one of `us`, `friendly`, `european`, or `iso`.
 
+### Mocking fetch requests
+
+Airtable scripts can either use `fetch`, or in extensions `remoteFetchAsync` to make HTTP requests. You can mock these requests using the `fetchMock` setting:
+
+```js
+const result = await runAirtableScript({
+  script: myScript,
+  base: baseFixture,
+  fetchMock: (url, request) => {
+    return {
+      status: 200,
+      body: JSON.stringify({ message: 'Hello, world!' }),
+    }
+  },
+})
+```
+
+### Mocking user inputs
+
+You can mock any `input` from either an automation input or user interaction using the `mockInput` setting:
+
+```js
+const results = await runAirtableScript({
+  script: `
+  const text = await input.textAsync('Select a table')
+  output.inspect(text)
+`,
+  base: randomRecords,
+  mockInput: {
+    // @ts-ignore
+    textAsync: (label) => {
+      if (label === 'Select a table') {
+        return 'text123'
+      }
+    },
+  },
+})
+```
+
+Every [input method for extensions or automations](https://airtable.com/developers/scripting/api/input) are available to be mocked. Check out the [input.test.ts](./test/input.test.ts) file for examples.
+
 ### Results
 
 The results from calling `runAirtableScript` are an object with several properties:
diff --git a/src/environment/console-aggregator.ts b/src/environment/console-aggregator.ts
index c079366..0294b45 100644
--- a/src/environment/console-aggregator.ts
+++ b/src/environment/console-aggregator.ts
@@ -13,6 +13,9 @@ type ConsoleAggregator = {
 /**
  * Returns a console object that aggregates all messages logged to it.
  * Used to override the global console object in tests.
+ *
+ * The _getMessages method is called after a test is run to pass the
+ * messages to the test runner.
  */
 const consoleAggregator = (): ConsoleAggregator => {
   const consoleMessages: ConsoleMessage[] = []
diff --git a/src/environment/index.ts b/src/environment/index.ts
index 58105dd..f7ffed2 100644
--- a/src/environment/index.ts
+++ b/src/environment/index.ts
@@ -12,15 +12,13 @@ import { OUTPUT_CLEAR } from './output-clear'
 
 type StrictGlobal = {
   runAirtableScript: (options: RunScriptOptions) => Promise<RunScriptResult>
-  MutationTypes: typeof MutationTypes | undefined
-  OUTPUT_CLEAR: typeof OUTPUT_CLEAR | undefined
+  MutationTypes: typeof MutationTypes
+  OUTPUT_CLEAR: typeof OUTPUT_CLEAR
 }
 
 export type AirtableScriptGlobal = Required<StrictGlobal>
 
 export class AirtableScriptEnvironment extends NodeEnvironment {
-  declare global: StrictGlobal & NodeEnvironment['global']
-
   constructor(config: JestEnvironmentConfig, _context: EnvironmentContext) {
     super(config, _context)
     this.global.runAirtableScript = runAirtableScript
diff --git a/src/environment/run-airtable-script.ts b/src/environment/run-airtable-script.ts
index d9bc8ab..6b5b14e 100644
--- a/src/environment/run-airtable-script.ts
+++ b/src/environment/run-airtable-script.ts
@@ -11,6 +11,8 @@ import {
 
 type DefaultDateLocale = 'friendly' | 'us' | 'european' | 'iso'
 
+type Output = [string, number, boolean] | { key: string; value: string }[]
+
 type RunScriptOptions = {
   script: string
   base: { base: unknown } | unknown
@@ -24,7 +26,7 @@ type RunScriptOptions = {
 }
 
 type RunScriptResult = {
-  output: unknown[]
+  output: Output
   mutations: Mutation[]
   console: ConsoleMessage[]
 }
@@ -47,6 +49,9 @@ type RunContext = {
 
 let sdkScript: string | null = null
 
+/**
+ * Runs a given Airtable script against a base fixture. Full definition is in src/environment/index.ts
+ */
 const runAirtableScript = async ({
   script,
   base,
@@ -77,8 +82,8 @@ const runAirtableScript = async ({
     __defaultDateLocale: defaultDateLocale,
     console: consoleAggregator(),
   }
-  vm.createContext(context)
 
+  vm.createContext(context)
   vm.runInContext(sdkScript, context)
   // We need to run the script in an async function so that we can use await
   // directly inside the script.
@@ -90,7 +95,7 @@ const runAirtableScript = async ({
   )
 
   return {
-    output: context.__output || [],
+    output: (context.__output as Output) || [],
     mutations: context.__mutations || [],
     console: context.console._getMessages(),
   }
diff --git a/src/environment/sdk/globals/output.ts b/src/environment/sdk/globals/output.ts
index 8e20d2c..625ac30 100644
--- a/src/environment/sdk/globals/output.ts
+++ b/src/environment/sdk/globals/output.ts
@@ -20,12 +20,18 @@ type ExtensionOutput = {
 // @ts-ignore
 globalThis.__output = []
 
+/**
+ * The output object if a script is being used within an automation.
+ */
 const automationOutput: AutomationOutput = {
   set: (key, value) => {
     __output.push({ key, value })
   },
 }
 
+/**
+ * The output object if a script is being used within an extension.
+ */
 const extensionOutput: ExtensionOutput = {
   /**
    * Displays the given text on-screen.
@@ -88,6 +94,7 @@ const extensionOutput: ExtensionOutput = {
   },
 }
 
+// Use one of the two outputs based on the context (extension or automation)
 const output: AutomationOutput | ExtensionOutput = globalThis.__inAutomation
   ? automationOutput
   : extensionOutput
diff --git a/src/environment/sdk/lib/pascal-case.ts b/src/environment/sdk/lib/pascal-case.ts
index 4fca71a..f66e0f5 100644
--- a/src/environment/sdk/lib/pascal-case.ts
+++ b/src/environment/sdk/lib/pascal-case.ts
@@ -1,5 +1,6 @@
 /**
- * A pascal case utility function.
+ * A pascal case utility function. Used for schema IDs, which always start with
+ * a three-letter lower-case prefix like tblTableId or fldFieldId.
  */
 const pascalCase = (str: string): string =>
   str
diff --git a/src/index.ts b/src/index.ts
index 91720e2..ac69b1b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,9 +1,37 @@
 export { AirtableScriptEnvironment as default } from './environment'
 
 import type { AirtableScriptGlobal } from './environment'
+import type {
+  RunScriptOptions,
+  RunScriptResult,
+} from './environment/run-airtable-script'
 
 declare global {
-  const runAirtableScript: AirtableScriptGlobal['runAirtableScript']
+  /**
+   * Runs a given Airtable script against a base fixture. Returns the output, console, and base
+   * mutations that the script generated.
+   *
+   * @param {RunScriptOptions} options
+   * @param {string} options.script The script to run, as a string.
+   * @param {Base} options.base The base fixture to run the script against. Generate this using
+   * the Test Fixture Generator extension.
+   * @param {boolean} [options.inAutomation=false] Whether the script is running in an automation. Defaults to false.
+   * @param {DefaultCursor | false} [options.defaultCursor=false] The default cursor to use for the script. Defaults to false.
+   * @param {Collaborator | false} [options.currentUser=false] The current user to use for the script. Defaults to false.
+   * @param {unknown} [options.mockInput=undefined] The mock input for the script. See the README for more information.
+   * @param {Function | false} [options.mockFetch=false] A function that mocks any fetch requests.
+   * @param {DefaultDateLocale} [options.defaultDateLocale='us'] The date format to use when a date field uses the "local" date format. Defaults to 'us'.
+   * @returns {Promise<RunScriptResult>}
+   */
+  const runAirtableScript: (
+    options: RunScriptOptions
+  ) => Promise<RunScriptResult>
+  /**
+   * An object containing the different types of mutations that can be tracked in a script.
+   */
   const MutationTypes: AirtableScriptGlobal['MutationTypes']
+  /**
+   * A special string that is used to denote that a call to output.clear() was made in the script.
+   */
   const OUTPUT_CLEAR: AirtableScriptGlobal['OUTPUT_CLEAR']
 }
diff --git a/test/input.test.ts b/test/input.test.ts
index 61dbbb9..286a83c 100644
--- a/test/input.test.ts
+++ b/test/input.test.ts
@@ -15,10 +15,12 @@ describe('Input', () => {
           config: () => ({ [key]: 'tbl123' }),
         },
       })
-      expect(results.output[0].key).toEqual('config')
-      expect(results.output[0].value).toEqual(
-        JSON.stringify({ [key]: 'tbl123' })
-      )
+      if (typeof results.output[0] === 'object') {
+        expect(results.output[0].key).toEqual('config')
+        expect(results.output[0].value).toEqual(
+          JSON.stringify({ [key]: 'tbl123' })
+        )
+      }
     })
   })
   describe('extension script', () => {