diff --git a/.eslintrc.js b/.eslintrc.js
index a7b20048d9..7431172f95 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -108,7 +108,7 @@ module.exports = {
   },
   overrides: [
     {
-      files: ['**/*/*/test/**/*.js'],
+      files: ['**/*/*/test/**/*.js', '**/*/*/test/**/*.ts'],
       extends: ['plugin:ava/recommended'],
       env: {
         browser: true,
diff --git a/packages/core/src/options.js b/packages/core/src/options.js
new file mode 100644
index 0000000000..496001d48b
--- /dev/null
+++ b/packages/core/src/options.js
@@ -0,0 +1,30 @@
+// @ts-check
+
+/**
+ * Value of the {@link LavaMoatOpts.scuttleGlobalThis} option.
+ *
+ * @typedef LavaMoatScuttleOpts
+ * @property {boolean} [enabled]
+ * @property {string[]} [exceptions]
+ * @property {string} [scuttlerName]
+ */
+
+/**
+ * Options for LavaMoat
+ *
+ * @typedef LavaMoatOpts
+ * @property {LavaMoatScuttleOpts} [scuttleGlobalThis] Enable or disable
+ *   scuttling of `globalThis`
+ * @property {string[]} [scuttleGlobalThisExceptions]
+ * @property {boolean} [writeAutoPolicy] Automatically write a policy file
+ * @property {boolean} [writeAutoPolicyDebug] Automatically write a debug policy
+ *   file
+ * @property {boolean} [writeAutoPolicyAndRun] Automatically write a policy file
+ *   and run the application
+ * @property {string} [policyPath] Path to policy file
+ * @property {string} [policyDebugPath] Path to policy debug file
+ * @property {string} [policyOverridePath] Path to policy override file
+ * @property {string} [projectRoot] Path to project root
+ * @property {boolean} [debugMode] Enable debug mode
+ * @property {boolean} [statsMode] Enable stats mode
+ */
diff --git a/packages/core/src/types.ts b/packages/core/src/types.ts
index e64d55de01..3d1ba72ff7 100644
--- a/packages/core/src/types.ts
+++ b/packages/core/src/types.ts
@@ -1,5 +1,6 @@
+export type * from './generatePolicy'
 export * from './index'
 export type * from './moduleRecord'
+export type * from './options'
 export type * from './parseForPolicy'
 export type * from './schema'
-export type * from './generatePolicy'
diff --git a/packages/core/test/scenarios/scenario.d.ts b/packages/core/test/scenario.ts
similarity index 79%
rename from packages/core/test/scenarios/scenario.d.ts
rename to packages/core/test/scenario.ts
index 3619a9b9c4..2cc1581954 100644
--- a/packages/core/test/scenarios/scenario.d.ts
+++ b/packages/core/test/scenario.ts
@@ -1,8 +1,7 @@
-// @ts-check
-
 import type { ExecutionContext } from 'ava'
-import type { LavaMoatOpts } from '../../../node/src/defaults'
-import type { LavaMoatPolicySchema } from '../../schema'
+import { ModuleInitializer } from '../src/moduleRecord'
+import type { LavaMoatOpts } from '../src/options'
+import { LavaMoatPolicy, LavaMoatPolicyOverrides } from '../src/schema'
 
 export type ScenarioType = 'truthy' | 'falsy' | 'deepEqual'
 
@@ -31,11 +30,7 @@ export interface NormalizedScenarioJSFile extends ScenarioFile {
 
 export interface NormalizedBuiltin extends NormalizedScenarioJSFile {
   specifier: string
-  moduleInitializer: (
-    exports: Record<string, any>,
-    require: (id: string) => any,
-    module: Record<string, any>
-  ) => void
+  moduleInitializer: ModuleInitializer
 }
 /**
  * Scenario file as provided by user
@@ -54,21 +49,17 @@ export interface ScenarioFile {
   type?: ScenarioFileType
   entry?: boolean
   importMap?: Record<string, string>
-  moduleInitializer?: (
-    exports: Record<string, any>,
-    require: (id: string) => any,
-    module: Record<string, any>
-  ) => void
+  moduleInitializer?: ModuleInitializer
 }
 
 export type ScenarioSourceFn = () => void
 
 export interface Scenario<Result = unknown> {
   name?: string
-  config?: LavaMoatPolicySchema
-  configOverride?: LavaMoatPolicySchema
+  config?: LavaMoatPolicy
+  configOverride?: LavaMoatPolicyOverrides
   expectedFailure?: boolean
-  expectedResult?: any
+  expectedResult?: Result
   defineEntry?: ScenarioSourceFn
   defineOne?: ScenarioSourceFn
   defineTwo?: ScenarioSourceFn
@@ -77,14 +68,14 @@ export interface Scenario<Result = unknown> {
   expectedFailureMessageRegex?: RegExp
   files?: Record<string, ScenarioFile>
   defaultPolicy?: boolean
-  builtin?: Record<string, any>
-  context?: Record<string, any>
+  builtin?: Record<string, unknown>
+  context?: Record<string, unknown>
   opts?: LavaMoatOpts
   dir?: string
   checkPostRun?: ScenarioCheckPostRunFn<Result>
   checkError?: ScenarioCheckErrorFn<Result>
   checkResult?: ScenarioCheckResultFn<Result>
-  kernelArgs?: Record<string, any>
+  kernelArgs?: Record<string, unknown>
   beforeCreateKernel?: (scenario: NormalizedScenario<Result>) => void
 }
 
@@ -109,8 +100,8 @@ export type NormalizedScenario<Result = unknown> = Required<
 > &
   Pick<Scenario<Result>, 'dir' | 'kernelArgs' | 'beforeCreateKernel'> & {
     entries: string[]
-    globalThis?: Record<string, any>
-    vmContext?: Record<string, any>
+    globalThis?: Record<string, unknown>
+    vmContext?: Record<string, unknown>
   }
 
 export type ScenarioCheckPostRunFn<Result = unknown> = (
diff --git a/packages/core/test/tsconfig.json b/packages/core/test/tsconfig.json
index 0634246577..6159e87b9c 100644
--- a/packages/core/test/tsconfig.json
+++ b/packages/core/test/tsconfig.json
@@ -1,10 +1,12 @@
 {
-  "extends": "../../../.config/tsconfig.test.json",
+  // not extending the test config b/c we must output some types
+  "extends": "../../../.config/tsconfig.src.json",
   "compilerOptions": {
     "checkJs": false,
-    "rootDir": "."
+    "rootDir": "..",
+    "outDir": "../types"
   },
-  "include": ["**/*"],
+  "include": ["**/*.js", "**/*.ts"],
   "references": [
     {
       "path": "../src/tsconfig.json"
diff --git a/packages/core/test/util.js b/packages/core/test/util.js
index a9ad3189a0..a4e292d3f5 100644
--- a/packages/core/test/util.js
+++ b/packages/core/test/util.js
@@ -30,7 +30,7 @@ module.exports = {
 
 /**
  * @typedef {Partial<import('../src/parseForPolicy').ParseForPolicyOpts> & {
- *   files: import('./scenarios/scenario').NormalizedScenarioJSFile[]
+ *   files: import('./scenario').NormalizedScenarioJSFile[]
  * }} GeneratePolicyFromFilesOpts
  */
 
@@ -41,17 +41,17 @@ module.exports = {
 async function generatePolicyFromFiles({ files, ...opts }) {
   const config = await parseForPolicy({
     moduleSpecifier:
-      /** @type {import('./scenarios/scenario').NormalizedScenarioJSFile} */ (
+      /** @type {import('./scenario').NormalizedScenarioJSFile} */ (
         files.find((file) => file.entry)
       ).specifier,
     resolveHook: (requestedName, parentAddress) => {
-      return /** @type {import('./scenarios/scenario').NormalizedScenarioJSFile} */ (
+      return /** @type {import('./scenario').NormalizedScenarioJSFile} */ (
         files.find((file) => file.specifier === parentAddress)
       ).importMap[requestedName]
     },
     importHook: async (address) => {
       return new LavamoatModuleRecord(
-        /** @type {import('./scenarios/scenario').NormalizedBuiltin} */ (
+        /** @type {import('./scenario').NormalizedBuiltin} */ (
           files.find((file) => file.specifier === address)
         )
       )
@@ -69,8 +69,8 @@ async function generatePolicyFromFiles({ files, ...opts }) {
  * running.
  *
  * @template [Result=unknown] Default is `unknown`
- * @param {import('./scenarios/scenario').Scenario<Result>} scenario
- * @returns {import('./scenarios/scenario').NormalizedScenario<Result>}
+ * @param {import('./scenario').Scenario} scenario
+ * @returns {import('./scenario').NormalizedScenario<{ value: string }>}
  */
 function createScenarioFromScaffold({
   name = 'template scenario',
@@ -80,12 +80,12 @@ function createScenarioFromScaffold({
   testType = 'deepEqual',
   checkPostRun = async (t, result, err, scenario) => {
     if (err) {
-      await /** @type {import('./scenarios/scenario').ScenarioCheckErrorFn<Result>} */ (
+      await /** @type {import('./scenario').ScenarioCheckErrorFn<Result>} */ (
         scenario.checkError
       )(t, err, scenario)
     } else {
       // assumes `result` is not undefined
-      await /** @type {import('./scenarios/scenario').ScenarioCheckResultFn<Result>} */ (
+      await /** @type {import('./scenario').ScenarioCheckResultFn<Result>} */ (
         scenario.checkResult
       )(t, /** @type {Result} */ (result), scenario)
     }
@@ -298,8 +298,11 @@ function createScenarioFromScaffold({
     expectedFailureMessageRegex,
     entries: ['entry.js'],
     files: _files,
-    config: _config,
-    configOverride: _configOverride,
+    config: /** @type {import('../src/schema').LavaMoatPolicy} */ (_config),
+    configOverride:
+      /** @type {import('../src/schema').LavaMoatPolicyOverrides} */ (
+        _configOverride
+      ),
     context,
     opts,
     dir,
@@ -342,7 +345,7 @@ function createHookedConsole() {
  *
  * @template [Result=unknown] Default is `unknown`
  * @typedef PlatformRunScenarioOpts
- * @property {import('./scenarios/scenario').NormalizedScenario<Result>} scenario
+ * @property {import('./scenario').NormalizedScenario<Result>} scenario
  * @property {boolean} [runWithPrecompiledModules]
  * @property {(...args: any[]) => void} [log]
  */
@@ -446,9 +449,8 @@ async function runScenario({ scenario, runWithPrecompiledModules = false }) {
      */
     getRelativeModuleId: (id, relative) => {
       return (
-        /** @type {import('./scenarios/scenario').NormalizedScenarioJSFile} */ (
-          files[id]
-        ).importMap[relative] || relative
+        /** @type {import('./scenario').NormalizedScenarioJSFile} */ (files[id])
+          .importMap[relative] || relative
       )
     },
     prepareModuleInitializerArgs,
@@ -479,8 +481,8 @@ async function runScenario({ scenario, runWithPrecompiledModules = false }) {
  * @param {Object} options - The options for preparing the scenario.
  * @param {FsPromiseApi} [options.fs] - The file system module to use (default:
  *   `node:fs/promises`).
- * @param {import('./scenarios/scenario').Scenario} options.scenario - The
- *   scenario object containing the files to write.
+ * @param {import('./scenario').Scenario} options.scenario - The scenario object
+ *   containing the files to write.
  * @param {string} [options.policyName='policies'] - The name of the policy
  *   directory (default: 'policies'). Default is `'policies'`
  * @param {string} [options.projectDir] - The project directory path.
@@ -522,9 +524,7 @@ async function prepareScenarioOnDisk({
     filesToWrite.map(async (file) => {
       const fullPath = path.join(
         /** @type {string} */ (projectDir),
-        /** @type {import('./scenarios/scenario').NormalizedScenarioJSFile} */ (
-          file
-        ).file
+        /** @type {import('./scenario').NormalizedScenarioJSFile} */ (file).file
       )
       const dirname = path.dirname(fullPath)
       await fs.mkdir(dirname, { recursive: true })
@@ -538,7 +538,7 @@ async function prepareScenarioOnDisk({
 }
 
 /**
- * @param {Record<string, import('./scenarios/scenario').ScenarioFile>} files
+ * @param {Record<string, import('./scenario').ScenarioFile>} files
  * @returns
  */
 function fillInFileDetails(files) {
@@ -566,7 +566,7 @@ function moduleDataForBuiltin(builtinObj, name) {
     file: name,
     package: name,
     type: 'builtin',
-    /** @type {import('./scenarios/scenario').ScenarioFile['moduleInitializer']} */
+    /** @type {import('./scenario').ScenarioFile['moduleInitializer']} */
     moduleInitializer: (_, _2, module) => {
       module.exports = builtinObj[name]
     },
@@ -647,7 +647,7 @@ function evaluateWithSourceUrl(filename, content, context) {
  * @returns {Promise<import('../src/schema').LavaMoatPolicy>}
  */
 async function createConfigForTest(testFn, opts = {}) {
-  /** @type {import('./scenarios/scenario').NormalizedScenarioJSFile[]} */
+  /** @type {import('./scenario').NormalizedScenarioJSFile[]} */
   const files = [
     {
       type: 'js',
@@ -676,21 +676,20 @@ async function createConfigForTest(testFn, opts = {}) {
 
 /**
  * @param {object} opts
- * @param {import('./scenarios/scenario').Scenario} opts.scenario
+ * @param {import('./scenario').Scenario} opts.scenario
  * @param {Partial<GeneratePolicyFromFilesOpts>} [opts.opts]
  */
 async function autoConfigForScenario({ scenario, opts = {} }) {
-  const files =
-    /** @type {import('./scenarios/scenario').NormalizedScenarioJSFile[]} */ (
-      Object.values(scenario.files ?? {})
-    )
+  const files = /** @type {import('./scenario').NormalizedScenarioJSFile[]} */ (
+    Object.values(scenario.files ?? {})
+  )
   const policy = await generatePolicyFromFiles({ files, ...opts })
   scenario.config = policy
 }
 
 /**
  * @param {object} opts
- * @param {import('./scenarios/scenario').NormalizedScenario} opts.scenario
+ * @param {import('./scenario').NormalizedScenario} opts.scenario
  */
 function convertOptsToArgs({ scenario }) {
   const { entries } = scenario
@@ -712,7 +711,7 @@ function functionToString(func) {
 /**
  * @template [Result=unknown] Default is `unknown`
  * @param {import('ava').ExecutionContext} t
- * @param {import('./scenarios/scenario').NormalizedScenario<Result>} scenario
+ * @param {import('./scenario').NormalizedScenario<Result>} scenario
  * @param {PlatformRunScenario<Result>} platformRunScenario
  * @returns {Promise<Result | undefined>}
  */
diff --git a/packages/node/src/defaults.js b/packages/node/src/defaults.js
index 18a83a11fc..8965474314 100644
--- a/packages/node/src/defaults.js
+++ b/packages/node/src/defaults.js
@@ -2,32 +2,7 @@ const { getDefaultPaths } = require('lavamoat-core')
 
 const defaultPaths = getDefaultPaths('node')
 
-/**
- * @typedef LavaMoatScuttleOpts
- * @property {boolean} [enabled]
- * @property {string[]} [exceptions]
- * @property {string} [scuttlerName]
- */
-
-/**
- * @typedef LavaMoatOpts
- * @property {LavaMoatScuttleOpts} [scuttleGlobalThis] Enable or disable
- *   scuttling of `globalThis`
- * @property {string[]} [scuttleGlobalThisExceptions]
- * @property {boolean} [writeAutoPolicy] Automatically write a policy file
- * @property {boolean} [writeAutoPolicyDebug] Automatically write a debug policy
- *   file
- * @property {boolean} [writeAutoPolicyAndRun] Automatically write a policy file
- *   and run the application
- * @property {string} [policyPath] Path to policy file
- * @property {string} [policyDebugPath] Path to policy debug file
- * @property {string} [policyOverridePath] Path to policy override file
- * @property {string} [projectRoot] Path to project root
- * @property {boolean} [debugMode] Enable debug mode
- * @property {boolean} [statsMode] Enable stats mode
- */
-
-/** @type {LavaMoatOpts} */
+/** @type {import('lavamoat-core').LavaMoatOpts} */
 const defaults = {
   scuttleGlobalThis: {},
   scuttleGlobalThisExceptions: [],