diff --git a/packages/endomoat/src/policy-gen/index.js b/packages/endomoat/src/policy-gen/index.js
index 5715dfbc06..3488cacdd3 100644
--- a/packages/endomoat/src/policy-gen/index.js
+++ b/packages/endomoat/src/policy-gen/index.js
@@ -23,6 +23,7 @@ const { fromEntries, entries } = Object
  *     readPowers?:
  *       | import('@endo/compartment-mapper').ReadFn
  *       | import('@endo/compartment-mapper').ReadPowers
+ *     debug?: boolean
  *   }
  * >} GeneratePolicyOptions
  */
@@ -31,9 +32,32 @@ const { fromEntries, entries } = Object
  * Generates a LavaMoat policy from a given entry point using
  * `@endo/compartment-mapper`
  *
+ * @overload
  * @param {string | URL} entrypointPath
- * @param {GeneratePolicyOptions} opts
+ * @param {GeneratePolicyOptions} [opts]
  * @returns {Promise<import('lavamoat-core').LavaMoatPolicy>}
+ * @public
+ */
+
+/**
+ * Generates a LavaMoat debug policy from a given entry point using
+ * `@endo/compartment-mapper`
+ *
+ * @overload
+ * @param {string | URL} entrypointPath
+ * @param {GeneratePolicyOptions & { debug: true }} opts
+ * @returns {Promise<import('lavamoat-core').LavaMoatPolicyDebug>}
+ * @public
+ */
+
+/**
+ * Generates a LavaMoat policy or debug policy from a given entry point using
+ * `@endo/compartment-mapper`
+ *
+ * @param {string | URL} entrypointPath
+ * @param {GeneratePolicyOptions} [opts]
+ * @returns {Promise<import('lavamoat-core').LavaMoatPolicy>}
+ * @public
  */
 export async function generatePolicy(
   entrypointPath,
@@ -48,11 +72,16 @@ export async function generatePolicy(
 
   const read = typeof readPowers === 'function' ? readPowers : readPowers.read
 
+  const baseOpts = { read, policyOverride }
+
+  // this weird thing is to make TS happy about the overload
+  const opts = debug ? { debug: true, ...baseOpts } : baseOpts
+
   return await PolicyGenerator.generatePolicy(
     compartmentMap,
     sources,
     renames,
-    { debug, read, policyOverride }
+    opts
   )
 }
 
@@ -65,6 +94,7 @@ export async function generatePolicy(
  *     | import('@endo/compartment-mapper').ReadFn
  *     | import('@endo/compartment-mapper').ReadPowers
  * }} opts
+ * @internal
  */
 export async function loadCompartmentMap(
   entrypointPath,
diff --git a/packages/endomoat/src/policy-gen/policy-generator-context.js b/packages/endomoat/src/policy-gen/policy-generator-context.js
index cd00e31220..ca2df46864 100644
--- a/packages/endomoat/src/policy-gen/policy-generator-context.js
+++ b/packages/endomoat/src/policy-gen/policy-generator-context.js
@@ -45,7 +45,7 @@ export class PolicyGeneratorContext {
   /**
    * Internal cache for {@link LavamoatModuleRecord} objects
    *
-   * @type {import('./lmr-cache.js').LMRCache}
+   * @type {Readonly<import('./lmr-cache.js').LMRCache>}
    */
   #lmrCache
 
@@ -61,7 +61,7 @@ export class PolicyGeneratorContext {
    *   import('@endo/compartment-mapper').CompartmentDescriptor
    * >} compartment
    * @param {Readonly<Record<string, string>>} renames
-   * @param {import('./lmr-cache.js').LMRCache} lmrCache
+   * @param {Readonly<import('./lmr-cache.js').LMRCache>} lmrCache
    * @param {Readonly<PolicyGeneratorContextOptions>} opts
    */
   constructor(
diff --git a/packages/endomoat/src/policy-gen/policy-generator.js b/packages/endomoat/src/policy-gen/policy-generator.js
index 3de258386f..82828e7a24 100644
--- a/packages/endomoat/src/policy-gen/policy-generator.js
+++ b/packages/endomoat/src/policy-gen/policy-generator.js
@@ -10,7 +10,6 @@ const { entries } = Object
  * Options for {@link PolicyGenerator} and {@link PolicyGenerator.generatePolicy}
  *
  * @typedef PolicyGeneratorOptions
- * @property {boolean} [debug]
  * @property {import('@endo/compartment-mapper').ReadFn} [read]
  * @property {import('lavamoat-core').LavaMoatPolicyOverrides} [policyOverride]
  */
@@ -19,9 +18,17 @@ const { entries } = Object
  * Service which generates a LavaMoat policy from a
  */
 export class PolicyGenerator {
-  /** @type {LMRCache} */
+  /**
+   * Cache of `LavamoatModuleRecord` objects
+   *
+   * @type {Readonly<LMRCache>}
+   */
   #lmrCache
+
   /**
+   * Creates {@link PolicyGeneratorContext} instances for each compartment in
+   * `compartmentMap`.
+   *
    * @param {Readonly<
    *   import('@endo/compartment-mapper').CompartmentMapDescriptor
    * >} compartmentMap
@@ -33,30 +40,40 @@ export class PolicyGenerator {
     compartmentMap,
     sources,
     renames,
-    {
-      read = defaultReadPower,
-      debug: includeDebugInfo = false,
-      policyOverride,
-    } = {}
+    { read = defaultReadPower, policyOverride } = {}
   ) {
     /**
+     * Compartment sources
+     *
      * @type {Readonly<import('@endo/compartment-mapper').Sources>}
+     * @internal
      */
     this.sources = sources
 
     /**
+     * Compartment map
+     *
      * @type {Readonly<
      *   import('@endo/compartment-mapper').CompartmentMapDescriptor
      * >}
+     * @internal
      */
     this.compartmentMap = compartmentMap
 
+    /**
+     * Cache of `LavamoatModuleRecord` objects
+     */
     this.#lmrCache = new LMRCache()
 
     const entryCompartment =
       compartmentMap.compartments[compartmentMap.entry.compartment]
 
-    /** @type {Map<string, PolicyGeneratorContext>} */
+    /**
+     * Mapping of compartment names to {@link PolicyGeneratorContext} instances
+     *
+     * @type {Readonly<Map<string, PolicyGeneratorContext>>}
+     * @internal
+     */
     this.contexts = new Map(
       entries(compartmentMap.compartments).map(
         ([compartmentName, compartment]) => [
@@ -69,11 +86,14 @@ export class PolicyGenerator {
       )
     )
 
-    this.inspector = createModuleInspector({
-      isBuiltin: nodeIsBuiltin,
-      includeDebugInfo,
-    })
-
+    /**
+     * Override policy, if any
+     *
+     * @type {Readonly<
+     *   import('lavamoat-core').LavaMoatPolicyOverrides | undefined
+     * >}
+     * @internal
+     */
     this.policyOverride = policyOverride
   }
 
@@ -87,8 +107,6 @@ export class PolicyGenerator {
   async buildModuleRecords() {
     await Promise.resolve()
 
-    this.#lmrCache.clear()
-
     let moduleRecords =
       /** @type {import('lavamoat-core').LavamoatModuleRecord[]} */ (
         (
@@ -121,17 +139,21 @@ export class PolicyGenerator {
   }
 
   /**
-   * Inspects a compartment map and sources, then generates module records.
+   * Uses `inspector` to inspect a compartment map and sources.
    *
+   * @param {import('lavamoat-core').ModuleInspector} inspector Module inspector
    * @param {import('lavamoat-core').LavamoatModuleRecord[]} moduleRecords
-   * @returns {Promise<void>}
+   *   Module records
+   * @returns {import('lavamoat-core').ModuleInspector} The inspector
    * @internal
    */
-  async inspectModuleRecords(moduleRecords) {
+  inspectModuleRecords(inspector, moduleRecords) {
     // FIXME: should we sort here?
     for (const record of moduleRecords) {
-      this.inspector.inspectModule(record)
+      inspector.inspectModule(record)
     }
+
+    return inspector
   }
 
   /**
@@ -144,14 +166,24 @@ export class PolicyGenerator {
    * 2. Inspect the module records using LavaMoat's `ModuleInspector`
    * 3. Generate the policy using the `ModuleInspector`
    *
-   * @returns {Promise<import('lavamoat-core').LavaMoatPolicy>} Generated policy
+   * @param {boolean} [debug] - If `true`, the result will be a debug policy
+   * @returns {Promise<
+   *   | import('lavamoat-core').LavaMoatPolicy
+   *   | import('lavamoat-core').LavaMoatPolicyDebug
+   * >}
+   *   Generated policy
+   * @internal
+   * @todo Overload this to handle the `debug` parameter
    */
-  async generatePolicy() {
+  async generatePolicy(debug) {
     const moduleRecords = await this.buildModuleRecords()
 
-    await this.inspectModuleRecords(moduleRecords)
+    const inspector = createModuleInspector({
+      isBuiltin: nodeIsBuiltin,
+      includeDebugInfo: debug,
+    })
 
-    return this.inspector.generatePolicy({
+    return this.inspectModuleRecords(inspector, moduleRecords).generatePolicy({
       policyOverride: this.policyOverride,
     })
   }
@@ -159,21 +191,51 @@ export class PolicyGenerator {
   /**
    * Instantiates a {@link PolicyGenerator} and generates a policy.
    *
+   * @overload
    * @param {Readonly<
    *   import('@endo/compartment-mapper').CompartmentMapDescriptor
    * >} compartmentMap
    * @param {Readonly<import('@endo/compartment-mapper').Sources>} sources
    * @param {Readonly<Record<string, string>>} renames
-   * @param {PolicyGeneratorOptions} opts
+   * @param {PolicyGeneratorOptions} [opts]
+   * @returns {Promise<import('lavamoat-core').LavaMoatPolicy>} Generated policy
+   */
+
+  /**
+   * Instantiates a {@link PolicyGenerator} and generates a debug policy.
+   *
+   * @overload
+   * @param {Readonly<
+   *   import('@endo/compartment-mapper').CompartmentMapDescriptor
+   * >} compartmentMap
+   * @param {Readonly<import('@endo/compartment-mapper').Sources>} sources
+   * @param {Readonly<Record<string, string>>} renames
+   * @param {PolicyGeneratorOptions & { debug: true }} opts
+   * @returns {Promise<import('lavamoat-core').LavaMoatPolicyDebug>} Generated
+   *   debug policy
+   * @public
+   */
+
+  /**
+   * Instantiates a {@link PolicyGenerator} and generates a policy.
+   *
+   * @param {Readonly<
+   *   import('@endo/compartment-mapper').CompartmentMapDescriptor
+   * >} compartmentMap
+   * @param {Readonly<import('@endo/compartment-mapper').Sources>} sources
+   * @param {Readonly<Record<string, string>>} renames
+   * @param {PolicyGeneratorOptions & { debug?: boolean }} [opts]
    * @returns {Promise<import('lavamoat-core').LavaMoatPolicy>} Generated policy
+   * @public
    */
   static async generatePolicy(compartmentMap, sources, renames, opts) {
+    const { debug, ...restOpts } = opts ?? {}
     const generator = new PolicyGenerator(
       compartmentMap,
       sources,
       renames,
-      opts
+      restOpts
     )
-    return generator.generatePolicy()
+    return generator.generatePolicy(debug)
   }
 }