diff --git a/src/browser/CdpElectronWorkers.ts b/src/browser/CdpElectronWorkers.ts
index 51a6b1e9e2..18f1bd3304 100644
--- a/src/browser/CdpElectronWorkers.ts
+++ b/src/browser/CdpElectronWorkers.ts
@@ -5,13 +5,16 @@ import type {
 } from "../domain/javascript/electronObservation.js";
 import type { CdpConnection } from "./CdpConnection.js";
 import { CdpCaptureCompleteness } from "./CdpCaptureCompleteness.js";
-import { recordValue, cdpStringValue } from "./CdpCaptureValues.js";
+import { recordValue } from "./CdpCaptureValues.js";
 import type { CdpEndpointTarget } from "./CdpEndpoint.js";
 import { optionalCdpCommand } from "./CdpOptionalCommand.js";
 import { authorizedElectronFile } from "./ElectronFileScope.js";
 import { compareUnicodeCodePoints } from "../domain/unicodeCodePointOrder.js";
 import { AnalysisCancelledError } from "../domain/analysisErrorCore.js";
-import { workerTargetOwnership } from "./CdpWorkerTargetOwnership.js";
+import {
+  parseCdpWorkerTarget,
+  workerTargetOwnership,
+} from "./CdpWorkerTarget.js";
 
 /** Inventory local worker targets without attaching to them. */
 export const captureElectronWorkers = async (input: {
@@ -47,33 +50,27 @@ export const captureElectronWorkers = async (input: {
   }
   for (const entry of targetInfos) {
     throwIfElectronWorkerCaptureCancelled(input.signal);
-    const target = recordValue(entry);
-    if (target === undefined) {
+    const parsed = parseCdpWorkerTarget(entry);
+    if (!parsed.ok) {
       input.completeness.exclude("workers", "invalid_protocol_value");
       continue;
     }
-    const type = cdpStringValue(target.type) ?? "";
-    if (!type.includes("worker")) continue;
+    const target = parsed.value;
+    if (target.kind === "non_worker") continue;
     const ownership = workerTargetOwnership(
       target,
       input.target.id,
       input.frameIds,
     );
-    if (!ownership.ok) {
-      input.completeness.exclude("workers", "invalid_protocol_value");
-      continue;
-    }
-    if (ownership.value.scope !== "selected") {
+    if (ownership !== "selected") {
       input.completeness.exclude(
         "workers",
-        ownership.value.scope === "unknown"
-          ? "unattributed_target"
-          : "out_of_target_scope",
+        ownership === "unknown" ? "unattributed_target" : "out_of_target_scope",
       );
       continue;
     }
     const path = await authorizedElectronFile(
-      cdpStringValue(target.url) ?? "",
+      target.url,
       input.signal,
       "inspect_electron_page",
       input.asarHeaderAdmission,
@@ -82,22 +79,13 @@ export const captureElectronWorkers = async (input: {
       input.completeness.exclude("workers", "out_of_target_scope");
       continue;
     }
-    const targetId = boundedTargetField(target.targetId);
-    if (targetId === null) {
-      input.completeness.exclude("workers", "invalid_protocol_value");
-      continue;
-    }
-    if (typeof target.attached !== "boolean") {
-      input.completeness.exclude("workers", "invalid_protocol_value");
-      continue;
-    }
     workers.push({
-      target_id: targetId,
-      type,
+      target_id: target.targetId,
+      type: target.type,
       file_path: path,
       attached: target.attached,
-      opener_target_id: ownership.value.openerTargetId,
-      parent_frame_id: ownership.value.parentFrameId,
+      opener_target_id: target.openerTargetId,
+      parent_frame_id: target.parentFrameId,
     });
   }
   return workers.sort((left, right) =>
@@ -111,8 +99,3 @@ const throwIfElectronWorkerCaptureCancelled = (signal?: AbortSignal): void => {
       cause: signal.reason,
     });
 };
-
-const boundedTargetField = (value: unknown): string | null => {
-  const field = cdpStringValue(value);
-  return field === undefined || field === "" ? null : field;
-};
diff --git a/src/browser/CdpPageCaptureWorkers.test.ts b/src/browser/CdpPageCaptureWorkers.test.ts
index 8a3f9e5e04..cc9ec57d91 100644
--- a/src/browser/CdpPageCaptureWorkers.test.ts
+++ b/src/browser/CdpPageCaptureWorkers.test.ts
@@ -9,7 +9,7 @@ import type { CaptureContext } from "./CdpPageCapture.js";
 
 const origin = "http://127.0.0.1:43127";
 
-const capture = async (inventory: unknown) => {
+const capture = async (inventory: unknown, frameIds = new Set<string>()) => {
   const input = inspectWebPageInputSchema.parse({
     cdp_endpoint: origin,
     allowed_origins: [origin],
@@ -38,7 +38,7 @@ const capture = async (inventory: unknown) => {
       limitations: [],
       events,
     },
-    new Set(),
+    frameIds,
   );
   return { workers, completeness: events.completeness.snapshot() };
 };
@@ -199,3 +199,74 @@ it.each([{ openerId: "" }, { parentFrameId: null }])(
     });
   },
 );
+
+it.each([
+  { type: undefined },
+  { type: 7 },
+  { type: "" },
+  { targetId: "" },
+  { url: undefined },
+  { attached: null },
+  { openerId: null },
+  { parentFrameId: "" },
+])(
+  "reports malformed worker facts before ownership and URL policy: %j",
+  async (override) => {
+    const result = await capture({
+      targetInfos: [
+        {
+          targetId: "worker",
+          type: "worker",
+          url: "https://outside.example/worker.js",
+          attached: false,
+          openerId: "foreign-page",
+          ...override,
+        },
+      ],
+    });
+    expect(result.workers).toEqual([]);
+    expect(result.completeness.excluded).toEqual([
+      { section: "workers", reason: "invalid_protocol_value", count: 1 },
+    ]);
+  },
+);
+
+it("uses parsed frame relationships without treating valid non-workers as malformed", async () => {
+  const result = await capture(
+    {
+      targetInfos: [
+        { type: "page" },
+        {
+          targetId: "worker",
+          type: "shared_worker",
+          url: `${origin}/worker.js`,
+          attached: false,
+          openerId: "foreign-page",
+          parentFrameId: "selected-frame",
+        },
+        {
+          targetId: "foreign",
+          type: "worker",
+          url: `${origin}/foreign.js`,
+          attached: true,
+          parentFrameId: "foreign-frame",
+        },
+      ],
+    },
+    new Set(["selected-frame"]),
+  );
+  expect(result.workers).toEqual([
+    {
+      target_id: "worker",
+      type: "shared_worker",
+      url: `${origin}/worker.js`,
+      origin,
+      attached: false,
+      opener_target_id: "foreign-page",
+      parent_frame_id: "selected-frame",
+    },
+  ]);
+  expect(result.completeness.excluded).toEqual([
+    { section: "workers", reason: "out_of_target_scope", count: 1 },
+  ]);
+});
diff --git a/src/browser/CdpPageCaptureWorkers.ts b/src/browser/CdpPageCaptureWorkers.ts
index 7415feef19..28f066f8e1 100644
--- a/src/browser/CdpPageCaptureWorkers.ts
+++ b/src/browser/CdpPageCaptureWorkers.ts
@@ -4,11 +4,13 @@ import {
   admitRecords,
   allowedSanitizedUrl,
   recordValue,
-  cdpStringValue,
 } from "./CdpCaptureValues.js";
 import type { CaptureContext } from "./CdpPageCapture.js";
 import { optionalCdpCommand } from "./CdpOptionalCommand.js";
-import { workerTargetOwnership } from "./CdpWorkerTargetOwnership.js";
+import {
+  parseCdpWorkerTarget,
+  workerTargetOwnership,
+} from "./CdpWorkerTarget.js";
 import { exclusionReasonForUrl } from "./CdpCaptureEventHelpers.js";
 
 interface CaptureWorkersInput {
@@ -42,59 +44,38 @@ export const captureWorkers = async (
   }
   let malformedEntries = 0;
   for (const entry of targets ?? []) {
-    const target = recordValue(entry);
-    if (target === undefined) {
-      malformedEntries += 1;
-      continue;
-    }
-    const type = cdpStringValue(target.type);
-    if (type === undefined || type.length === 0) {
-      malformedEntries += 1;
-      continue;
-    }
-    if (!type.includes("worker")) continue;
-    const targetId = cdpStringValue(target.targetId);
-    if (
-      targetId === undefined ||
-      targetId.length === 0 ||
-      typeof target.attached !== "boolean" ||
-      typeof target.url !== "string"
-    ) {
+    const parsed = parseCdpWorkerTarget(entry);
+    if (!parsed.ok) {
       malformedEntries += 1;
       continue;
     }
+    const target = parsed.value;
+    if (target.kind === "non_worker") continue;
     const ownership = workerTargetOwnership(
       target,
       context.target.id,
       frameIds,
     );
-    if (!ownership.ok) {
-      malformedEntries += 1;
-      continue;
-    }
-    if (ownership.value.scope !== "selected") {
+    if (ownership !== "selected") {
       completeness.exclude(
         "workers",
-        ownership.value.scope === "unknown"
-          ? "unattributed_target"
-          : "out_of_target_scope",
+        ownership === "unknown" ? "unattributed_target" : "out_of_target_scope",
       );
       continue;
     }
     const url = allowedSanitizedUrl(target.url, allowedOrigins);
     if (url === undefined) {
-      const rawUrl = cdpStringValue(target.url);
-      completeness.exclude("workers", exclusionReasonForUrl(rawUrl));
+      completeness.exclude("workers", exclusionReasonForUrl(target.url));
       continue;
     }
     items.push({
-      target_id: targetId,
-      type,
+      target_id: target.targetId,
+      type: target.type,
       url: url.url,
       origin: url.origin,
       attached: target.attached,
-      opener_target_id: ownership.value.openerTargetId,
-      parent_frame_id: ownership.value.parentFrameId,
+      opener_target_id: target.openerTargetId,
+      parent_frame_id: target.parentFrameId,
     });
   }
   if (malformedEntries > 0)
diff --git a/src/browser/CdpWorkerTarget.ts b/src/browser/CdpWorkerTarget.ts
new file mode 100644
index 0000000000..a90e6a5d55
--- /dev/null
+++ b/src/browser/CdpWorkerTarget.ts
@@ -0,0 +1,70 @@
+import { err, ok, type Result } from "../domain/result.js";
+import { cdpStringValue, recordValue } from "./CdpCaptureValues.js";
+
+export interface CdpWorkerRelationships {
+  readonly openerTargetId: string | null;
+  readonly parentFrameId: string | null;
+}
+
+export interface CdpWorkerTarget extends CdpWorkerRelationships {
+  readonly kind: "worker";
+  readonly targetId: string;
+  readonly type: string;
+  readonly url: string;
+  readonly attached: boolean;
+}
+
+/** Admit protocol facts before either consumer applies target or URL policy. */
+export const parseCdpWorkerTarget = (
+  input: unknown,
+): Result<
+  CdpWorkerTarget | { readonly kind: "non_worker" },
+  { readonly _tag: "InvalidWorkerTarget" }
+> => {
+  const target = recordValue(input);
+  const type = cdpStringValue(target?.type);
+  if (target === undefined || type === undefined || type === "")
+    return err({ _tag: "InvalidWorkerTarget" });
+  if (!type.includes("worker")) return ok({ kind: "non_worker" });
+  const targetId = cdpStringValue(target.targetId);
+  const url = cdpStringValue(target.url);
+  const openerTargetId = cdpStringValue(target.openerId);
+  const parentFrameId = cdpStringValue(target.parentFrameId);
+  if (
+    targetId === undefined ||
+    targetId === "" ||
+    url === undefined ||
+    typeof target.attached !== "boolean" ||
+    (target.openerId !== undefined &&
+      (openerTargetId === undefined || openerTargetId === "")) ||
+    (target.parentFrameId !== undefined &&
+      (parentFrameId === undefined || parentFrameId === ""))
+  )
+    return err({ _tag: "InvalidWorkerTarget" });
+  return ok({
+    kind: "worker",
+    targetId,
+    type,
+    url,
+    attached: target.attached,
+    openerTargetId: openerTargetId ?? null,
+    parentFrameId: parentFrameId ?? null,
+  });
+};
+
+/** Optional CDP relationships establish ownership only when supplied. */
+export const workerTargetOwnership = (
+  relationships: CdpWorkerRelationships,
+  selectedTargetId: string,
+  frameIds: ReadonlySet<string>,
+): "selected" | "foreign" | "unknown" => {
+  const { openerTargetId, parentFrameId } = relationships;
+  if (
+    openerTargetId === selectedTargetId ||
+    (parentFrameId !== null && frameIds.has(parentFrameId))
+  )
+    return "selected";
+  return openerTargetId === null && parentFrameId === null
+    ? "unknown"
+    : "foreign";
+};
diff --git a/src/browser/CdpWorkerTargetOwnership.ts b/src/browser/CdpWorkerTargetOwnership.ts
deleted file mode 100644
index 27611119c0..0000000000
--- a/src/browser/CdpWorkerTargetOwnership.ts
+++ /dev/null
@@ -1,38 +0,0 @@
-import { err, ok, type Result } from "../domain/result.js";
-import { cdpStringValue } from "./CdpCaptureValues.js";
-
-/** Optional CDP relationships establish ownership only when supplied. */
-export const workerTargetOwnership = (
-  target: Readonly<Record<string, unknown>>,
-  selectedTargetId: string,
-  frameIds: ReadonlySet<string>,
-): Result<
-  {
-    readonly scope: "selected" | "foreign" | "unknown";
-    readonly openerTargetId: string | null;
-    readonly parentFrameId: string | null;
-  },
-  { readonly _tag: "InvalidWorkerRelationship" }
-> => {
-  const openerTargetId = cdpStringValue(target.openerId);
-  const parentFrameId = cdpStringValue(target.parentFrameId);
-  if (
-    (target.openerId !== undefined &&
-      (openerTargetId === undefined || openerTargetId === "")) ||
-    (target.parentFrameId !== undefined &&
-      (parentFrameId === undefined || parentFrameId === ""))
-  )
-    return err({ _tag: "InvalidWorkerRelationship" });
-  const selected =
-    openerTargetId === selectedTargetId ||
-    (parentFrameId !== undefined && frameIds.has(parentFrameId));
-  return ok({
-    scope: selected
-      ? "selected"
-      : openerTargetId === undefined && parentFrameId === undefined
-        ? "unknown"
-        : "foreign",
-    openerTargetId: openerTargetId ?? null,
-    parentFrameId: parentFrameId ?? null,
-  });
-};
diff --git a/tests/boundary/browser/cdpElectronProvider.test.ts b/tests/boundary/browser/cdpElectronProvider.test.ts
index e4ca0f6886..f18b45ec17 100644
--- a/tests/boundary/browser/cdpElectronProvider.test.ts
+++ b/tests/boundary/browser/cdpElectronProvider.test.ts
@@ -849,6 +849,85 @@ describe("CdpElectronProvider malformed inventory replies", () => {
     );
   });
 
+  it.each([
+    ["missing type", { type: undefined }],
+    ["non-string type", { type: 7 }],
+    ["empty type", { type: "" }],
+    ["missing target identity", { targetId: undefined }],
+    ["non-string target identity", { targetId: 7 }],
+    ["empty target identity", { targetId: "" }],
+    ["missing URL", { url: undefined }],
+    ["non-string URL", { url: 7 }],
+    ["missing attached state", { attached: undefined }],
+    ["non-boolean attached state", { attached: "false" }],
+    ["non-string opener relationship", { openerId: 7 }],
+    ["empty opener relationship", { openerId: "" }],
+    ["non-string frame relationship", { parentFrameId: 7 }],
+    ["empty frame relationship", { parentFrameId: "" }],
+  ] as const)(
+    "retains valid workers while reporting %s before target policy",
+    async (_kind, malformed) => {
+      const inspected = await inspectWith("Target.getTargets", (fileUrl) => ({
+        targetInfos: [
+          {
+            targetId: "selected-worker",
+            type: "worker",
+            url: fileUrl,
+            attached: false,
+            openerId: "electron-page",
+          },
+          {
+            targetId: "malformed-worker",
+            type: "worker",
+            url: fileUrl,
+            attached: false,
+            openerId: "foreign-page",
+            ...malformed,
+          },
+          {
+            targetId: "foreign-worker",
+            type: "shared_worker",
+            url: fileUrl,
+            attached: true,
+            openerId: "foreign-page",
+          },
+          {
+            targetId: "unattributed-worker",
+            type: "service_worker",
+            url: fileUrl,
+            attached: false,
+          },
+          // Non-worker rows do not need worker identity or relationship fields.
+          { type: "page", targetId: 7, openerId: null },
+        ],
+      }));
+      expect(inspected.workers).toEqual([
+        expect.objectContaining({
+          target_id: "selected-worker",
+          type: "worker",
+          attached: false,
+          opener_target_id: "electron-page",
+          parent_frame_id: null,
+        }),
+      ]);
+      const workerExclusions = inspected.completeness.excluded.filter(
+        ({ section }) => section === "workers",
+      );
+      expect(workerExclusions).toHaveLength(3);
+      expect(workerExclusions).toEqual(
+        expect.arrayContaining([
+          { section: "workers", reason: "invalid_protocol_value", count: 1 },
+          { section: "workers", reason: "out_of_target_scope", count: 1 },
+          { section: "workers", reason: "unattributed_target", count: 1 },
+        ]),
+      );
+      expect(inspected.completeness.unavailable_sections).toContain("workers");
+      expect(inspected.completeness.policy_filtered_sections).toContain(
+        "workers",
+      );
+    },
+  );
+
   it.each([
     ["dom", "DOMSnapshot.captureSnapshot", () => ({ strings: [] })],
     [