diff --git a/docs/javascript-runtime-reconciliation.md b/docs/javascript-runtime-reconciliation.md
index decbd0f844..65b75ea31e 100644
--- a/docs/javascript-runtime-reconciliation.md
+++ b/docs/javascript-runtime-reconciliation.md
@@ -144,6 +144,10 @@ Script inventory completeness remains a separate reported fact. Unavailable,
 truncated, or attach-limited worker inventory prevents negative code-presence
 claims even when the selected page's script inventory is complete. Accepted
 positive script correspondences remain loaded.
+An Electron script's explicit unknown `frame_scope` preserves its reported
+frame ID and sourceURL provenance as node properties, but does not link that
+script to the current frame inventory. Attach-limited script coverage cannot
+establish negative code-presence claims.
 
 None of these states proves feature execution, initialization order,
 reachability, or causality. In particular, `not-observed-in-capture` never means
diff --git a/src/browser/execution/CdpRuntimeSources.ts b/src/browser/execution/CdpRuntimeSources.ts
index 36ca0d2e7e..d488f3a6bc 100644
--- a/src/browser/execution/CdpRuntimeSources.ts
+++ b/src/browser/execution/CdpRuntimeSources.ts
@@ -4,9 +4,9 @@ import { AnalysisError } from "../../domain/analysisErrorBase.js";
 import { AnalysisOutputError } from "../../domain/analysisErrorCore.js";
 import { sanitizeBrowserUrl } from "../../domain/browserObservation.js";
 import { jsonObjectSchema } from "../../domain/jsonValue.js";
-import {
-  type WebRuntimeSource,
-  type webRuntimeLocationSchema,
+import type {
+  WebRuntimeSource,
+  webRuntimeLocationSchema,
 } from "../../domain/webRuntime.js";
 import type { CdpEvent } from "../CdpConnection.js";
 import type { CdpRuntimeSession } from "./CdpRuntimeSession.js";
diff --git a/src/domain/javascript/javascriptRuntimeReconciliationCaptureParsing.ts b/src/domain/javascript/javascriptRuntimeReconciliationCaptureParsing.ts
index b1b2d441d1..864a7e5c55 100644
--- a/src/domain/javascript/javascriptRuntimeReconciliationCaptureParsing.ts
+++ b/src/domain/javascript/javascriptRuntimeReconciliationCaptureParsing.ts
@@ -506,10 +506,12 @@ const assertRuntimeParameters = (
 };
 
 const scriptsComplete = (completeness: {
+  readonly attach_limited_sections: readonly string[];
   readonly truncated_sections: readonly string[];
   readonly unavailable_sections: readonly string[];
   readonly dropped_events: { readonly scripts: number };
 }): boolean =>
+  !completeness.attach_limited_sections.includes("scripts") &&
   !completeness.truncated_sections.includes("scripts") &&
   !completeness.unavailable_sections.includes("scripts") &&
   completeness.dropped_events.scripts === 0;
diff --git a/src/domain/javascript/javascriptRuntimeReconciliationRuntime.ts b/src/domain/javascript/javascriptRuntimeReconciliationRuntime.ts
index 44b8960c42..7b79b7a8ae 100644
--- a/src/domain/javascript/javascriptRuntimeReconciliationRuntime.ts
+++ b/src/domain/javascript/javascriptRuntimeReconciliationRuntime.ts
@@ -157,7 +157,10 @@ const scriptEntities = (
       nodeKind: "runtime-script-instance",
       runtimeKey: script.script_key,
       targetKey: capture.inspection.target.target_id,
-      frameKey: script.frame_id,
+      frameKey:
+        "frame_scope" in script && script.frame_scope === "unknown"
+          ? null
+          : script.frame_id,
       scriptKey: script.script_key,
       location,
       staticKind: "javascript",
@@ -176,6 +179,15 @@ const scriptEntities = (
         ...("reported_url" in script && script.reported_url !== undefined
           ? { reported_url: script.reported_url }
           : {}),
+        ...("frame_scope" in script && script.frame_scope !== undefined
+          ? {
+              frame_scope: script.frame_scope,
+              reported_frame_id: script.frame_id,
+            }
+          : {}),
+        ...("has_source_url" in script && script.has_source_url !== undefined
+          ? { has_source_url: script.has_source_url }
+          : {}),
         cdp_hash: script.cdp_hash,
         length: script.length,
         is_module: script.is_module,
diff --git a/tests/boundary/filesystem/javascript-applications/javascriptRuntimeReconciliation.test.ts b/tests/boundary/filesystem/javascript-applications/javascriptRuntimeReconciliation.test.ts
index 05934d6c57..77d51b016b 100644
--- a/tests/boundary/filesystem/javascript-applications/javascriptRuntimeReconciliation.test.ts
+++ b/tests/boundary/filesystem/javascript-applications/javascriptRuntimeReconciliation.test.ts
@@ -11,6 +11,7 @@ import { reconcileJavaScriptRuntimeEvidence } from "../../../../src/application/
 import { createEvidence } from "../../../../src/domain/evidence.js";
 import { mappedRuntimePaths } from "../../../../src/domain/javascript/javascriptRuntimeStaticCandidates.js";
 import { projectRuntimeCaptures } from "../../../../src/domain/javascript/javascriptRuntimeReconciliationRuntime.js";
+import { parseRuntimeCaptures } from "../../../../src/domain/javascript/javascriptRuntimeReconciliationCaptureParsing.js";
 import { electronPageInspectionSchema } from "../../../../src/domain/javascript/electronObservation.js";
 import {
   readRuntimeReconciliationInput,
@@ -263,6 +264,63 @@ it("preserves positive script matches without inventing worker absence when work
   );
 });
 
+it("preserves unknown Electron frame provenance without linking it to an authorized frame", async () => {
+  const root = await applicationFixture();
+  const recorded = electronRuntimeEvidence(root, SOURCE);
+  const inspection = electronPageInspectionSchema.parse(
+    recorded.normalized_result,
+  );
+  const evidence = createEvidence(undefined, recorded.provider, {
+    predicateType: recorded.predicate_type,
+    operation: recorded.operation,
+    parameters: recorded.parameters,
+    confidence: recorded.confidence,
+    authority: recorded.authority,
+    result: {
+      ...inspection,
+      completeness: {
+        ...inspection.completeness,
+        status: "attach_limited",
+        conditions: ["attach_limited"],
+        attach_limited_sections: ["scripts"],
+      },
+      scripts: {
+        ...inspection.scripts,
+        items: inspection.scripts.items.map((script) => ({
+          ...script,
+          frame_scope: "unknown",
+          has_source_url: true,
+          reported_url: "file:///reported-label.js",
+        })),
+      },
+    },
+  });
+  const captures = parseRuntimeCaptures([evidence]);
+  expect(captures[0]?.scriptsCompleteWithinScope).toBe(false);
+  const projected = projectRuntimeCaptures(captures);
+  const script = projected.entities.find(({ kind }) => kind === "script");
+  expect(script?.frameKey).toBeNull();
+  expect(script?.node.properties).toMatchObject({
+    frame_scope: "unknown",
+    reported_frame_id: inspection.scripts.items[0]?.frame_id,
+    has_source_url: true,
+    reported_url: "file:///reported-label.js",
+  });
+  const frameIds = new Set(
+    projected.entities
+      .filter(({ kind }) => kind === "frame")
+      .map(({ node }) => node.node_id),
+  );
+  expect(
+    projected.edges.some(
+      (edge) =>
+        edge.relation === "contains" &&
+        frameIds.has(edge.source_node_id) &&
+        edge.target_node_id === script?.node.node_id,
+    ),
+  ).toBe(false);
+});
+
 it("reconciles active Electron as a partial target-only runtime capture", async () => {
   const fixture = await applicationFixture();
   const staticEvidence = await analyzeFixture(fixture);