diff --git a/src/browser/CdpCaptureEventHandlers.ts b/src/browser/CdpCaptureEventHandlers.ts
index 9519cd785b..bf0d36d4dc 100644
--- a/src/browser/CdpCaptureEventHandlers.ts
+++ b/src/browser/CdpCaptureEventHandlers.ts
@@ -89,7 +89,6 @@ export const handleScriptParsed = (
     url: sanitized.url,
     origin: sanitized.origin,
     ...scriptMetadataValues(params),
-    language: cdpStringValue(params.scriptLanguage) ?? null,
     executionContextKey: executionContext,
     frameId:
       executionContext === null
diff --git a/src/browser/CdpCaptureValues.ts b/src/browser/CdpCaptureValues.ts
index c5010c6b6f..713df21e42 100644
--- a/src/browser/CdpCaptureValues.ts
+++ b/src/browser/CdpCaptureValues.ts
@@ -49,6 +49,7 @@ export const scriptMetadataValues = (
   readonly hash: string | null;
   readonly length: number | null;
   readonly isModule: boolean | null;
+  readonly language: string | null;
 } => {
   const length = numberValue(value?.length);
   return {
@@ -58,6 +59,7 @@ export const scriptMetadataValues = (
         ? length
         : null,
     isModule: typeof value?.isModule === "boolean" ? value.isModule : null,
+    language: cdpStringValue(value?.scriptLanguage) ?? null,
   };
 };
 
diff --git a/src/browser/CdpElectronScriptEvents.ts b/src/browser/CdpElectronScriptEvents.ts
index a7d2e907df..ea5181c22d 100644
--- a/src/browser/CdpElectronScriptEvents.ts
+++ b/src/browser/CdpElectronScriptEvents.ts
@@ -55,7 +55,6 @@ export const ingestElectronScriptEvent = (input: {
     scriptId,
     rawUrl,
     ...scriptMetadataValues(value),
-    language: cdpStringValue(value?.scriptLanguage) ?? null,
     frameId:
       contextKey === null
         ? null
diff --git a/src/domain/browserObservationSchemas.ts b/src/domain/browserObservationSchemas.ts
index 6c643ec8b0..138acafb72 100644
--- a/src/domain/browserObservationSchemas.ts
+++ b/src/domain/browserObservationSchemas.ts
@@ -1,9 +1,13 @@
 import { z } from "zod";
 
 import { browserCompletenessSchema } from "./browserCompleteness.js";
-import { webTextArtifactSchema } from "./webContentArtifact.js";
+import {
+  cdpDomNodeSchema,
+  cdpScriptSourceSchema,
+  cdpScriptMetadataSchema,
+} from "./cdpObservationSchemas.js";
 import { jsonShapeSchema } from "./jsonShape.js";
-import { prefixedDigestSchema } from "./../domain/digests.js";
+import { prefixedDigestSchema } from "./digests.js";
 
 /** Shared CDP/browser version identity carried on observation Evidence. */
 export const browserVersionSchema = z.object({
@@ -47,14 +51,6 @@ const browserFrameSchema = z.object({
   url: z.string(),
   origin: z.string().nullable(),
 });
-const browserDomNodeSchema = z.object({
-  index: z.number().int().min(0),
-  parent_index: z.number().int().min(-1),
-  node_type: z.number().int().min(0),
-  node_name: z.string(),
-  node_value_length: z.number().int().min(0),
-  attribute_names: z.array(z.string()),
-});
 const browserAxNodeSchema = z.object({
   node_id: z.string(),
   parent_id: z.string().nullable(),
@@ -71,13 +67,6 @@ const browserAxNodeSchema = z.object({
     )
     .default([]),
 });
-const browserScriptSourceSchema = z.discriminatedUnion("included", [
-  z.object({ included: z.literal(false), reason: z.string() }),
-  z.object({
-    included: z.literal(true),
-    artifact: webTextArtifactSchema,
-  }),
-]);
 const browserResourceReconciliationSchema = z.discriminatedUnion("status", [
   z.object({ status: z.literal("exact"), resource_key: z.string() }),
   z.object({
@@ -94,26 +83,10 @@ const browserScriptSchema = z.object({
   frame_id: z.string().nullable().default(null),
   url: z.string(),
   origin: z.string().nullable(),
-  cdp_hash: z
-    .string()
-    .nullable()
-    .describe("Producer-reported script hash; null when unavailable."),
-  length: z
-    .number()
-    .int()
-    .min(0)
-    .nullable()
-    .describe("Producer-reported script length; null when unavailable."),
-  is_module: z
-    .boolean()
-    .nullable()
-    .describe(
-      "Producer-reported module classification; null when unavailable.",
-    ),
-  language: z.string().nullable(),
+  ...cdpScriptMetadataSchema.shape,
   source_map_url: z.string().nullable(),
   resource_reconciliation: browserResourceReconciliationSchema,
-  source: browserScriptSourceSchema,
+  source: cdpScriptSourceSchema,
 });
 const browserResourceSchema = z.object({
   resource_key: prefixedDigestSchema("res"),
@@ -297,7 +270,7 @@ export const webPageInspectionSchema = z.object({
   frames: z.array(browserFrameSchema),
   dom: z.object({
     total_nodes: z.number().int().min(0),
-    nodes: z.array(browserDomNodeSchema),
+    nodes: z.array(cdpDomNodeSchema),
   }),
   accessibility: z.object({
     total_nodes: z.number().int().min(0),
diff --git a/src/domain/cdpObservationSchemas.ts b/src/domain/cdpObservationSchemas.ts
new file mode 100644
index 0000000000..839af85b2b
--- /dev/null
+++ b/src/domain/cdpObservationSchemas.ts
@@ -0,0 +1,42 @@
+import { z } from "zod";
+import { webTextArtifactSchema } from "./webContentArtifact.js";
+
+/** Structural DOM facts shared by passive web and Electron observations. */
+export const cdpDomNodeSchema = z.object({
+  index: z.number().int().min(0),
+  parent_index: z.number().int().min(-1),
+  node_type: z.number().int().min(0),
+  node_name: z.string(),
+  node_value_length: z.number().int().min(0),
+  attribute_names: z.array(z.string()),
+});
+
+/** Captured text or an explicit reason why source is unavailable. */
+export const cdpScriptSourceSchema = z.discriminatedUnion("included", [
+  z.object({ included: z.literal(false), reason: z.string() }),
+  z.object({
+    included: z.literal(true),
+    artifact: webTextArtifactSchema,
+  }),
+]);
+
+/** Producer script declarations; unavailable facts remain null. */
+export const cdpScriptMetadataSchema = z.object({
+  cdp_hash: z
+    .string()
+    .nullable()
+    .describe("Producer-reported script hash; null when unavailable."),
+  length: z
+    .number()
+    .int()
+    .min(0)
+    .nullable()
+    .describe("Producer-reported script length; null when unavailable."),
+  is_module: z
+    .boolean()
+    .nullable()
+    .describe(
+      "Producer-reported module classification; null when unavailable.",
+    ),
+  language: z.string().nullable(),
+});
diff --git a/src/domain/javascript/electronObservation.ts b/src/domain/javascript/electronObservation.ts
index a5d7e21d27..ada76e98e8 100644
--- a/src/domain/javascript/electronObservation.ts
+++ b/src/domain/javascript/electronObservation.ts
@@ -4,7 +4,11 @@ import { webRuntimeCommandTimeoutSchema } from "../browserDeadline.js";
 import { browserCompletenessSchema } from "../browserCompleteness.js";
 import { browserEndpointSchema } from "../browserObservation.js";
 import { browserVersionSchema } from "../browserObservationSchemas.js";
-import { webTextArtifactSchema } from "../webContentArtifact.js";
+import {
+  cdpDomNodeSchema,
+  cdpScriptSourceSchema,
+  cdpScriptMetadataSchema,
+} from "../cdpObservationSchemas.js";
 import { prefixedDigestSchema } from "../digests.js";
 
 const approvedElectronInput = {
@@ -65,11 +69,6 @@ export const electronTargetListSchema = z.object({
 });
 export type ElectronTargetList = z.infer<typeof electronTargetListSchema>;
 
-const electronSourceSchema = z.discriminatedUnion("included", [
-  z.object({ included: z.literal(false), reason: z.string() }),
-  z.object({ included: z.literal(true), artifact: webTextArtifactSchema }),
-]);
-
 /** Provider-neutral passive Electron file-page structure and script inventory. */
 export const electronPageInspectionSchema = z.object({
   browser: browserVersionSchema,
@@ -89,16 +88,7 @@ export const electronPageInspectionSchema = z.object({
   ),
   dom: z.object({
     total_nodes: z.number().int().min(0),
-    nodes: z.array(
-      z.object({
-        index: z.number().int().min(0),
-        parent_index: z.number().int().min(-1),
-        node_type: z.number().int().min(0),
-        node_name: z.string(),
-        node_value_length: z.number().int().min(0),
-        attribute_names: z.array(z.string()),
-      }),
-    ),
+    nodes: z.array(cdpDomNodeSchema),
   }),
   scripts: z.object({
     total: z.number().int().min(0),
@@ -107,24 +97,8 @@ export const electronPageInspectionSchema = z.object({
         script_key: prefixedDigestSchema("electron_script"),
         frame_id: z.string().nullable().default(null),
         file_path: z.string(),
-        cdp_hash: z
-          .string()
-          .nullable()
-          .describe("Producer-reported script hash; null when unavailable."),
-        length: z
-          .number()
-          .int()
-          .min(0)
-          .nullable()
-          .describe("Producer-reported script length; null when unavailable."),
-        is_module: z
-          .boolean()
-          .nullable()
-          .describe(
-            "Producer-reported module classification; null when unavailable.",
-          ),
-        language: z.string().nullable(),
-        source: electronSourceSchema,
+        ...cdpScriptMetadataSchema.shape,
+        source: cdpScriptSourceSchema,
       }),
     ),
   }),