fix(plugins): use shared handoff resources and native patch versions

integrations/agent-plugin-core/tests/test_handoff_runtime.py

@@ -19,7 +19,7 @@ launcher = importlib.util.module_from_spec(SPEC)
 SPEC.loader.exec_module(launcher)
 REVISION = "1" * 40
 FILES = {
-    "claude_to_codex.py": b"def main(argv=None, default_source=None):\n    return 0\n",
+    "handoff_engine.py": b"def main(argv=None, default_source=None):\n    return 0\n",
     "handoff_sources.py": b"# reader\n",
 }
 
@@ -87,7 +87,7 @@ def test_failed_second_download_publishes_no_partial_runtime(tmp_path, monkeypat
     def download(url, timeout):
         if url.endswith("handoff_sources.py"):
             raise URLError("offline")
-        return io.BytesIO(FILES["claude_to_codex.py"])
+        return io.BytesIO(FILES["handoff_engine.py"])
 
     monkeypatch.setattr(launcher, "urlopen", download)
     with pytest.raises(OSError, match="could not download pinned handoff runtime handoff_sources.py"):
@@ -103,7 +103,7 @@ def test_hash_mismatch_never_replaces_existing_cache(tmp_path, monkeypatch):
     monkeypatch.setattr(launcher, "urlopen", lambda *args, **kwargs: io.BytesIO(b"wrong response"))
     with pytest.raises(ValueError, match="SHA256 mismatch"):
         launcher.runtime_root(plugin)
-    assert (cache / "claude_to_codex.py").read_bytes() == FILES["claude_to_codex.py"]
+    assert (cache / "handoff_engine.py").read_bytes() == FILES["handoff_engine.py"]
     assert (cache / "handoff_sources.py").read_bytes() == b"tampered"
     assert list(cache.parent.iterdir()) == [cache]
 
@@ -111,7 +111,7 @@ def test_hash_mismatch_never_replaces_existing_cache(tmp_path, monkeypatch):
 def test_tampered_cache_cannot_run_offline(tmp_path, monkeypatch, capsys):
     plugin, cache, _ = installation(tmp_path, monkeypatch)
     launcher.runtime_root(plugin)
-    (cache / "claude_to_codex.py").write_bytes(b"untrusted code")
+    (cache / "handoff_engine.py").write_bytes(b"untrusted code")
 
     def offline(*args, **kwargs):
         raise URLError("offline")
@@ -150,7 +150,7 @@ def test_missing_manifest_returns_actionable_error(tmp_path, monkeypatch, capsys
 def test_launcher_executes_adjacent_engine_with_generic_cli_contract(tmp_path):
     shutil.copy2(CORE / "python" / "session_handoff.py", tmp_path / "session_handoff.py")
     (tmp_path / "handoff_sources.py").write_text("# reader\n")
-    (tmp_path / "claude_to_codex.py").write_text(
+    (tmp_path / "handoff_engine.py").write_text(
         "import sys\ndef main(argv=None, default_source='unexpected'):\n"
         "    assert default_source is None\n    assert sys.argv[1:] == ['--bundle', '-']\n    return 7\n"
     )
@@ -163,7 +163,7 @@ def test_launcher_executes_adjacent_engine_with_generic_cli_contract(tmp_path):
 def test_manifest_declares_only_launcher_and_hashes_pinned_engines():
     manifest = json.loads((CORE / "build" / "handoff-runtime.json").read_text())
     assert manifest["artifacts"] == ["session_handoff.py", "handoff-runtime.json"]
-    assert manifest["revision"] == "0fb924051fa876b5d6311fe3378794cc92fb6ff8"
+    assert len(manifest["revision"]) == 40 and all(char in "0123456789abcdef" for char in manifest["revision"])
     assert set(manifest["files"]) == launcher.ENGINE_FILES
     for name, digest in manifest["files"].items():
         assert digest == hashlib.sha256((CORE / "python" / name).read_bytes()).hexdigest()