diff --git a/src/application/binary/AnalysisProviderRegistry.test.ts b/src/application/binary/AnalysisProviderRegistry.test.ts
index 10c440daa0..ef4b44394e 100644
--- a/src/application/binary/AnalysisProviderRegistry.test.ts
+++ b/src/application/binary/AnalysisProviderRegistry.test.ts
@@ -1132,6 +1132,34 @@ it("joins cancelled readiness finalization and shutdown before admitting another
   }
 });
 
+it.each(["alpha", "beta"])(
+  "retains unknown owned-resource cleanup when %s has no completion signal",
+  async (unknownOwner) => {
+    const unknown = new ProviderAdapterError(unknownOwner, "close_binary", {
+      userMessage: "cleanup completion unknown",
+    });
+    const tracked = new ProviderCleanupError("rea", ["owned-reader"], {});
+    let released = false;
+    const registry = new AnalysisProviderRegistry(
+      ["alpha", "beta"].map((id) => ({
+        ...candidate(id).provider,
+        closeOwnedResources: async () => {
+          if (!released) return err(id === unknownOwner ? unknown : tracked);
+          if (id !== unknownOwner) tracked.resolveCleanup();
+          return ok(null);
+        },
+      })),
+    );
+    const closed = await registry.closeOwnedResources();
+    if (closed.ok) throw new Error("Expected incomplete registry close");
+    expect(closed.error.cleanupIncomplete).toBe(true);
+    released = true;
+    expect(await registry.closeOwnedResources()).toEqual(ok(null));
+    expect(tracked.cleanupIncomplete).toBe(false);
+    expect(closed.error.cleanupIncomplete).toBe(true);
+  },
+);
+
 it("joins every candidate and retains physical failure with exact mixed cleanup owners", async () => {
   const alpha = candidate("alpha").provider;
   const beta = candidate("beta").provider;
diff --git a/src/application/binary/AnalysisProviderRegistry.ts b/src/application/binary/AnalysisProviderRegistry.ts
index e07ce2820e..0a61b66605 100644
--- a/src/application/binary/AnalysisProviderRegistry.ts
+++ b/src/application/binary/AnalysisProviderRegistry.ts
@@ -252,16 +252,15 @@ export class AnalysisProviderRegistry {
     const distinct = [...new Set(failures)];
     if (distinct.length === 0) return ok(null);
     if (distinct.length === 1) return err(distinct[0]!);
-    return err(
-      new ProviderCleanupError(
-        "rea",
-        [...new Set(distinct.flatMap((failure) => failure.cleanupResources))],
-        { reason: distinct.map((failure) => failure.message).join("; ") },
-        { cause: new AggregateError(distinct) },
-      ).bindCleanupDependencies(
-        distinct.filter((failure) => failure.cleanupIncomplete),
-      ),
+    const failure = new ProviderCleanupError(
+      "rea",
+      [...new Set(distinct.flatMap((failure) => failure.cleanupResources))],
+      { reason: distinct.map((failure) => failure.message).join("; ") },
+      { cause: new AggregateError(distinct) },
     );
+    if (distinct.every((failure) => failure.cleanupIncomplete))
+      failure.bindCleanupDependencies(distinct);
+    return err(failure);
   }
 
   /** List the unique deep-operation declarations without probing candidates. */
diff --git a/src/application/binary/BinarySession.ts b/src/application/binary/BinarySession.ts
index 6186a9afe7..6627353b5a 100644
--- a/src/application/binary/BinarySession.ts
+++ b/src/application/binary/BinarySession.ts
@@ -913,7 +913,8 @@ export class BinarySession
           next,
           "close_binary",
         );
-        resourceFailure.bindCleanupDependencies([previous, next]);
+        if (previous.cleanupIncomplete && next.cleanupIncomplete)
+          resourceFailure.bindCleanupDependencies([previous, next]);
       }
     if (!closed.ok && resourceFailure !== undefined) {
       const combined = analysisErrorWithCleanupFailure(
@@ -921,7 +922,8 @@ export class BinarySession
         resourceFailure,
         "close_binary",
       );
-      combined.bindCleanupDependencies([closed.error, resourceFailure]);
+      if (closed.error.cleanupIncomplete && resourceFailure.cleanupIncomplete)
+        combined.bindCleanupDependencies([closed.error, resourceFailure]);
       return err(combined);
     }
     if (!closed.ok) return closed;
diff --git a/src/application/binary/BinarySessionBundleResources.test.ts b/src/application/binary/BinarySessionBundleResources.test.ts
index b7f3552ecd..9ea8d52e2d 100644
--- a/src/application/binary/BinarySessionBundleResources.test.ts
+++ b/src/application/binary/BinarySessionBundleResources.test.ts
@@ -982,6 +982,64 @@ it.each([0, 1])(
   },
 );
 
+it.each([
+  ["binary", "client"],
+  ["binary", "files"],
+  ["bundle", "client"],
+  ["bundle", "files"],
+] as const)(
+  "keeps unknown %s close completion when the %s owner has no cleanup signal",
+  async (targetKind, unknownOwner) => {
+    const tracked = new ProviderCleanupError(identity.id, ["owned-reader"], {});
+    const unknown = new ProviderAdapterError(identity.id, "close_binary", {
+      userMessage: "cleanup completion unknown",
+    });
+    let released = false;
+    let failCleanup = false;
+    const closeOwner = async (owner: "client" | "files") => {
+      if (!failCleanup) return ok(null);
+      if (!released) return err(owner === unknownOwner ? unknown : tracked);
+      if (owner !== unknownOwner) tracked.resolveCleanup();
+      return ok(null);
+    };
+    const client: AnalysisClient = {
+      execute: async () => ok(createAnalysisExecution(null, binaryIdentity)),
+      close: () => closeOwner("client"),
+    };
+    // Exercise the public session close composition with independently owned
+    // file cleanup; the file owner's failure shape is the regression boundary.
+    class SessionWithFileCleanup extends BinarySession {
+      override closeFileResources() {
+        return closeOwner("files");
+      }
+    }
+    const session = new SessionWithFileCleanup(
+      createTestProviderRouter(() => client),
+      new InvestigationRecords(),
+      { createClient: () => ({ client, capabilities: [] }) },
+    );
+    if (targetKind === "binary") {
+      expect(await session.open(process.execPath)).toMatchObject({ ok: true });
+    } else {
+      const rootPath = await mkdtemp(join(tmpdir(), "rea-resource-close-"));
+      temporaryDirectories.push(rootPath);
+      await writeFile(join(rootPath, "Info.plist"), "<plist><dict/></plist>");
+      expect(await session.openBundleResources(rootPath)).toMatchObject({
+        ok: true,
+      });
+    }
+    failCleanup = true;
+    const closed = await session.close();
+    if (closed.ok) throw new Error("Expected incomplete close");
+    expect(closed.error.cleanupIncomplete).toBe(true);
+    released = true;
+    expect(await session.close()).toMatchObject({ ok: true });
+    expect(tracked.cleanupIncomplete).toBe(false);
+    expect(closed.error.cleanupIncomplete).toBe(true);
+    expect(await session.status()).toMatchObject({ cleanup_pending: false });
+  },
+);
+
 it.each(["health", "cancellation"] as const)(
   "updates early resource-open %s cleanup after its candidate retries",
   async (failureStage) => {