diff --git a/tests/boundary/browser/cdpBrowserProvider.document_script.test.ts b/tests/boundary/browser/cdpBrowserProvider.document_script.test.ts
index 07c867c9df..e843ed9694 100644
--- a/tests/boundary/browser/cdpBrowserProvider.document_script.test.ts
+++ b/tests/boundary/browser/cdpBrowserProvider.document_script.test.ts
@@ -381,11 +381,11 @@ it.each(
       reason: "invalid_protocol_value",
       count: 1,
     });
-    expect(
-      result.value.completeness.attach_limited_sections.includes(
-        "webmcp_tools",
-      ),
-    ).toBe(scope !== "foreign");
+    // Initial allowed-child replay coverage remains unknown even when a
+    // later event positively identifies that child's destination as foreign.
+    expect(result.value.completeness.attach_limited_sections).toContain(
+      "webmcp_tools",
+    );
     expect(
       result.value.completeness.policy_filtered_sections.includes(
         "webmcp_tools",
@@ -483,7 +483,7 @@ it.each(
       result.value.completeness.attach_limited_sections.includes(
         "webmcp_tools",
       ),
-    ).toBe(uncertain);
+    ).toBe(uncertain || valid);
     expect(
       result.value.completeness.policy_filtered_sections.includes(
         "webmcp_tools",
@@ -523,11 +523,13 @@ describe("CdpBrowserProvider: transient WebMCP frames", () => {
     expect(result.value.completeness.attach_limited_sections).toContain(
       "webmcp_tools",
     );
-    expect(
-      result.value.completeness.excluded.find(
-        ({ section }) => section === "webmcp_tools",
-      )?.count,
-    ).toBe(1);
+    // Initial foreign frame and its replay declaration are two exclusions;
+    // their count does not describe the transient allowed child.
+    expect(result.value.completeness.excluded).toContainEqual({
+      section: "webmcp_tools",
+      reason: "out_of_target_scope",
+      count: 2,
+    });
   });
 
   it("accepts fresh child registrations after a stable frame commit", async () => {
@@ -551,7 +553,9 @@ describe("CdpBrowserProvider: transient WebMCP frames", () => {
     expect(result.value.tools.items).toContainEqual(
       expect.objectContaining({ name: "child_tool" }),
     );
-    expect(result.value.completeness.attach_limited_sections).not.toContain(
+    // Fresh registration restores this tool, but cannot recover pre-attach
+    // declarations from the initial allowed child frame.
+    expect(result.value.completeness.attach_limited_sections).toContain(
       "webmcp_tools",
     );
   });
@@ -864,11 +868,43 @@ describe("CdpBrowserProvider WebMCP schema comparison", () => {
       $ref: "https://untrusted.invalid/schema.json",
       examples: [{ token: "caller-schema-value" }],
     };
-    const options: { webMcpTools: boolean; webMcpInputSchema: JsonValue } = {
-      webMcpTools: true,
-      webMcpInputSchema: declaration,
-    };
-    const browser = await startFakeCdpBrowser(options);
+    let inputSchema: JsonValue = declaration;
+    const browser = await startFakeCdpBrowser({
+      // A root-only replay supplies complete owner correspondence. Foreign
+      // filtering and pre-existing child coverage are tested separately above.
+      eventsBeforeReply: ["WebMCP.enable"],
+      commandEvents: ({ method, sessionId }) =>
+        method === "WebMCP.enable"
+          ? [
+              {
+                method: "WebMCP.toolsAdded",
+                ...(sessionId === undefined ? {} : { sessionId }),
+                params: {
+                  tools: [
+                    {
+                      name: "schema_tool",
+                      frameId: "frame-main",
+                      inputSchema,
+                      annotations: { consequential: false },
+                    },
+                  ],
+                },
+              },
+            ]
+          : undefined,
+      commandResult: ({ method }, origin) =>
+        method === "Page.getFrameTree"
+          ? {
+              frameTree: {
+                frame: {
+                  id: "frame-main",
+                  loaderId: "loader-main",
+                  url: `${origin}/app`,
+                },
+              },
+            }
+          : undefined,
+    });
     trackBrowser(browser);
     const provider = new CdpBrowserProvider();
     const input = {
@@ -895,7 +931,7 @@ describe("CdpBrowserProvider WebMCP schema comparison", () => {
       trust: "page-declared-untrusted",
     });
     const compare = async (schema: JsonValue) => {
-      options.webMcpInputSchema = schema;
+      inputSchema = schema;
       const after = await discover();
       const diff = compareWebCaptures(
         compareWebCapturesInputSchema.parse({
@@ -908,7 +944,7 @@ describe("CdpBrowserProvider WebMCP schema comparison", () => {
     const reordered = Object.fromEntries(Object.entries(declaration).reverse());
     const equivalent = await compare(reordered);
     expect(equivalent.dimension).toMatchObject({
-      status: "unknown",
+      status: "unchanged",
       total_changes: 0,
     });
     expect(equivalent.after.tools.items[0]?.input_schema_sha256).toBe(
diff --git a/tests/boundary/browser/cdpElectronProvider.test.ts b/tests/boundary/browser/cdpElectronProvider.test.ts
index 1c447e6a2e..e4ca0f6886 100644
--- a/tests/boundary/browser/cdpElectronProvider.test.ts
+++ b/tests/boundary/browser/cdpElectronProvider.test.ts
@@ -1108,7 +1108,9 @@ it.each(
       expect(result.value.scripts.items).toContainEqual(
         expect.objectContaining({
           cdp_hash: id,
-          frame_id: parent === "valid" ? id : null,
+          frame_id: id,
+          frame_scope: parent === "valid" ? "authorized" : "unknown",
+          frame_claims: { execution_context_frame_id: id },
         }),
       );
     if (parent !== "valid") {
@@ -1239,7 +1241,8 @@ it.each(
     expect(result.value.scripts.items).toContainEqual(
       expect.objectContaining({
         cdp_hash: "local",
-        frame_id: phase === "invalidated" ? null : "local",
+        frame_id: "local",
+        frame_scope: phase === "invalidated" ? "unknown" : "authorized",
       }),
     );
     expect(result.value.completeness.policy_filtered_sections).toContain(
@@ -1476,17 +1479,23 @@ it.each([
         expect.objectContaining({ cdp_hash: "before", frame_id: "child" }),
         expect.objectContaining({
           cdp_hash: "after-replay",
-          frame_id: expectedOwner ? "child" : null,
+          frame_id: "child",
+          frame_scope: expectedOwner ? "authorized" : "unknown",
         }),
         expect.objectContaining({
           cdp_hash: "descendant",
-          frame_id: expectedOwner ? "grandchild" : null,
+          frame_id: "grandchild",
+          frame_scope: expectedOwner ? "authorized" : "unknown",
         }),
       ]),
     );
     if (kind === "post-detach")
       expect(result.value.scripts.items).toContainEqual(
-        expect.objectContaining({ cdp_hash: "after-detach", frame_id: null }),
+        expect.objectContaining({
+          cdp_hash: "after-detach",
+          frame_id: "child",
+          frame_scope: "unknown",
+        }),
       );
     expect(
       result.value.completeness.attach_limited_sections.includes("scripts"),
diff --git a/tests/boundary/browser/cdpJsonShapeComparison.test.ts b/tests/boundary/browser/cdpJsonShapeComparison.test.ts
index 8e9ea57615..4c9b747cd4 100644
--- a/tests/boundary/browser/cdpJsonShapeComparison.test.ts
+++ b/tests/boundary/browser/cdpJsonShapeComparison.test.ts
@@ -155,6 +155,12 @@ describe.each<BodySource>(["request", "response", "base64 response"])(
         before + " ".repeat(length - Buffer.byteLength(before)),
         after + " ".repeat(length - Buffer.byteLength(after)),
       );
+      expect(
+        (await compareCaptures(...captures)).dimensions.network,
+      ).toMatchObject({
+        status: "unknown",
+        total_changes: 0,
+      });
       const result = await compareCaptures(
         completeNormalizedCapture(captures[0]),
         completeNormalizedCapture(captures[1]),
@@ -181,6 +187,12 @@ describe.each<BodySource>(["request", "response", "base64 response"])(
           Buffer.byteLength(beforeBody) - Buffer.byteLength(changedBody),
         );
       const [before, after] = comparableCaptures(source, beforeBody, afterBody);
+      expect(
+        (await compareCaptures(before, after)).dimensions.network,
+      ).toMatchObject({
+        status: "unknown",
+        total_changes: 0,
+      });
       const result = await compareCaptures(
         completeNormalizedCapture(before),
         completeNormalizedCapture(after),
diff --git a/tests/boundary/browser/cdpResourceCompleteness.test.ts b/tests/boundary/browser/cdpResourceCompleteness.test.ts
index c392617fc0..09f12feb48 100644
--- a/tests/boundary/browser/cdpResourceCompleteness.test.ts
+++ b/tests/boundary/browser/cdpResourceCompleteness.test.ts
@@ -215,7 +215,10 @@ describe("resource inventory omissions through CDP", () => {
       expect(capture.completeness.unavailable_sections).not.toContain(
         "resources",
       );
-      expect(compareResources(capture, capture).status).toBe("unchanged");
+      // Omitted contentSize is valid metadata, but cannot prove equal resource size.
+      expect(compareResources(capture, capture).status).toBe(
+        size === null ? "unknown" : "unchanged",
+      );
     },
   );
 
diff --git a/tests/boundary/browser/cdpWebMcpTransientIdentity.test.ts b/tests/boundary/browser/cdpWebMcpTransientIdentity.test.ts
index 45d9026ee0..2427b12346 100644
--- a/tests/boundary/browser/cdpWebMcpTransientIdentity.test.ts
+++ b/tests/boundary/browser/cdpWebMcpTransientIdentity.test.ts
@@ -194,9 +194,11 @@ it.each([
   expect(
     result.value.completeness.policy_filtered_sections.includes("webmcp_tools"),
   ).toBe(rawUrl !== "allowed");
-  expect(result.value.completeness.attach_limited_sections).not.toContain(
-    "webmcp_tools",
-  );
+  // The initial allowed child may have unreported pre-attach registrations.
+  // A literal #about:blank fragment does not make that coverage complete.
+  expect(
+    result.value.completeness.attach_limited_sections.includes("webmcp_tools"),
+  ).toBe(rawUrl === "allowed");
   if (rawUrl === "allowed")
     expect(result.value.tools.items[0]?.frame_url).toBe(
       browser.allowedOrigin + "/child#about:blank",
diff --git a/tests/boundary/cli/browserCli.test.ts b/tests/boundary/cli/browserCli.test.ts
index a8b63ca643..6f0023f52b 100644
--- a/tests/boundary/cli/browserCli.test.ts
+++ b/tests/boundary/cli/browserCli.test.ts
@@ -222,6 +222,26 @@ it(
       redirectCapture(inspection, browser.allowedOrigin, 307),
     );
     expect(knownDifference).toMatchObject({
+      normalized_result: {
+        dimensions: { network: { status: "unknown", total_changes: 0 } },
+      },
+    });
+    // A closed imported request inventory supplies the missing directional
+    // proof; two attachment-limited samples cannot pair repeated requests.
+    const closed = redirectCapture(inspection, browser.allowedOrigin, 302);
+    if (!isRecord(closed.inspection.completeness))
+      throw new Error("Missing capture completeness");
+    const limited = closed.inspection.completeness.attach_limited_sections;
+    if (!Array.isArray(limited)) throw new Error("Missing attachment coverage");
+    closed.inspection.completeness.attach_limited_sections = limited.filter(
+      (section) => section !== "network_requests",
+    );
+    expect(
+      await compareCapturesCli(
+        closed,
+        redirectCapture(inspection, browser.allowedOrigin, 307),
+      ),
+    ).toMatchObject({
       normalized_result: {
         dimensions: { network: { status: "changed", total_changes: 1 } },
       },
diff --git a/tests/boundary/cli/httpCaptureComparison.test.ts b/tests/boundary/cli/httpCaptureComparison.test.ts
index 10d3733518..e49d5758d3 100644
--- a/tests/boundary/cli/httpCaptureComparison.test.ts
+++ b/tests/boundary/cli/httpCaptureComparison.test.ts
@@ -42,18 +42,27 @@ it("CLI compares incomplete HTTP responses without inventing changes", async ()
     expect(finished.network.requests).toMatchObject([
       { status: 200, mime_type: "application/json", encoded_data_length: 100 },
     ]);
-    const paths = [pending, finished, changed].map((_, index) =>
+    // Passive attachment cannot establish the complete same-URL request
+    // inventory. Closed imported captures can, and retain the positive oracle.
+    const closed = structuredClone(pending);
+    closed.completeness.attach_limited_sections =
+      closed.completeness.attach_limited_sections.filter(
+        (section) => section !== "network_requests",
+      );
+    const captures = [pending, finished, changed, closed];
+    const paths = captures.map((_, index) =>
       join(root, `capture-${String(index)}.json`),
     );
     await Promise.all(
-      [pending, finished, changed].map((inspection, index) =>
+      captures.map((inspection, index) =>
         writeFile(paths[index]!, JSON.stringify({ inspection })),
       ),
     );
     for (const [left, right, status, count] of [
       [0, 1, "unknown", 0],
       [1, 0, "unknown", 0],
-      [0, 2, "changed", 1],
+      [0, 2, "unknown", 0],
+      [3, 2, "changed", 1],
     ] as const) {
       const compared = await runCliJson([
         "compare-web-captures",
diff --git a/tests/boundary/mcp/browserComparisonInput.test.ts b/tests/boundary/mcp/browserComparisonInput.test.ts
index 4930e81b43..fd15f96294 100644
--- a/tests/boundary/mcp/browserComparisonInput.test.ts
+++ b/tests/boundary/mcp/browserComparisonInput.test.ts
@@ -215,9 +215,11 @@ describe("browser comparison input boundary", () => {
       const parsedScenario =
         browserCaptureComparisonInputSchema.parse(withoutNormalization);
       expect(parsedScenario).toHaveProperty("normalization", { rules: [] });
+      // The public example explicitly marks events missing and equality
+      // ineligible; normalization defaults cannot restore uncaptured evidence.
       expect(compareBrowserCaptures(parsedScenario)).toMatchObject({
         comparison_kind: "browser_scenario",
-        overall_status: "unchanged",
+        overall_status: "unknown",
       });
     } finally {
       await Promise.allSettled([
diff --git a/tests/boundary/process/browserScenarioProbeLifecycle.test.ts b/tests/boundary/process/browserScenarioProbeLifecycle.test.ts
index 52960f90ae..9afbef027a 100644
--- a/tests/boundary/process/browserScenarioProbeLifecycle.test.ts
+++ b/tests/boundary/process/browserScenarioProbeLifecycle.test.ts
@@ -156,7 +156,17 @@ it("closes optional providers when MCP server startup throws", async () => {
       }),
     });
 
-    expect(transport).toEqual({ ok: false });
+    expect(transport).toMatchObject({
+      ok: false,
+      cancelled: false,
+      handle: { close: expect.any(Function) },
+      closeAndroid: expect.any(Function),
+      closeOptionalProviders: expect.any(Function),
+    });
+    // Failed admission still returns partial owners for idempotent retries.
+    await transport.handle.close();
+    await transport.closeOptionalProviders();
+    await transport.closeAndroid();
     expect(browserClose).toHaveBeenCalledTimes(1);
     expect(scenarioClose).toHaveBeenCalledTimes(1);
     expect(electronClose).toHaveBeenCalledTimes(1);
diff --git a/tests/process-global/browserScenarioCleanup.test.ts b/tests/process-global/browserScenarioCleanup.test.ts
index 5c1c0f2e20..ff7a2af357 100644
--- a/tests/process-global/browserScenarioCleanup.test.ts
+++ b/tests/process-global/browserScenarioCleanup.test.ts
@@ -439,7 +439,7 @@ it("preserves cancellation diagnostics while retrying retained cleanup", async (
     const result = await serveScenario();
     expect(result.output).toMatchObject({
       code: "cleanup_incomplete",
-      category: "execution_failure",
+      category: "cancelled",
       details: {
         cleanup: "incomplete",
         diagnostics: {