diff --git a/src/application/BinaryTargetResolver.ts b/src/application/BinaryTargetResolver.ts
index 7dfb7ce76e..cbccb04189 100644
--- a/src/application/BinaryTargetResolver.ts
+++ b/src/application/BinaryTargetResolver.ts
@@ -294,6 +294,9 @@ const detectArtifactFormat = async (
     if (lower.endsWith(".app")) return "app-pack";
     return zipPackageFormatForPath(lower) ?? "zip";
   }
+  // Binary plists, including keyed archives, often use other extensions.
+  if (observed.bytesRead === 8 && magic.equals(Buffer.from("bplist00")))
+    return "plist";
   const named = namedArtifactFormat(lower);
   if (named !== undefined) return named;
   if (
diff --git a/tests/boundary/filesystem/binaryTarget.test.ts b/tests/boundary/filesystem/binaryTarget.test.ts
index 3ab9bdd27e..0aae910e85 100644
--- a/tests/boundary/filesystem/binaryTarget.test.ts
+++ b/tests/boundary/filesystem/binaryTarget.test.ts
@@ -245,6 +245,17 @@ describe("binary target I/O: package classification", () => {
     });
   });
 
+  it("classifies a binary plist by its magic under any extension", async () => {
+    const directory = await createTestTempDirectory("rea-bplist-target-");
+    const path = join(directory, "Model.archive");
+    await writeFile(path, buildBinary({ $archiver: "NSKeyedArchiver" }));
+    const result = await parseBinaryTarget(path);
+    expect(result.ok && result.value).toMatchObject({
+      kind: "artifact",
+      format: "plist",
+    });
+  });
+
   it("does not trust a ZIP-family extension without ZIP magic", async () => {
     const directory = await createTestTempDirectory("rea-fake-archive-");
     const path = join(directory, "fake.zip");