diff --git a/scripts/check_installed_server.py b/scripts/check_installed_server.py
index 85b8d525..a6e0e66c 100644
--- a/scripts/check_installed_server.py
+++ b/scripts/check_installed_server.py
@@ -181,10 +181,13 @@ async def restore_drill(settings, folder, client, packet, source_dsn):
         expected_settings['recovery_quarantine'] = current_settings['recovery_quarantine']
         original['tables']['settings'] = sorted(canonical(row) for row in expected_settings.items())
         assert current == original, 'Restore changed other table values or sequence state'
+        restored_settings = load_settings(folder / 'restore-etc')
+        marker = restored_settings.recovery_marker
+        assert marker.is_file(), 'Restore did not install its configured quarantine marker'
         for marker_present in (True, False):
             if not marker_present:
-                (folder / 'restore-etc/recovery-drill.json').unlink()
-            recovered = Application(load_settings(folder / 'restore-etc'))
+                marker.unlink()
+            recovered = Application(restored_settings)
             try:
                 await recovered.load()
                 replay = await recovered.executor.execute(packet)
diff --git a/src/msg/plugins/discovery.py b/src/msg/plugins/discovery.py
index 1a615f4f..c3ad6004 100644
--- a/src/msg/plugins/discovery.py
+++ b/src/msg/plugins/discovery.py
@@ -570,8 +570,15 @@ def install(app):
     op, finish = registration(app, 'discovery', ('identity', 'content'))
     fields = {'type': 'array', 'items': STRING, 'maxItems': 30, 'uniqueItems': True}
 
+    @op(
+        'discovery.read_query',
+        obj({'home_summary': {'const': True}}, ('home_summary',)),
+        effect='read',
+        version=4,
+    )
     async def home(ctx, request, tx):
         """Live counts and recent resources, filtered by current read access."""
+        require(ctx.principal.subject is None, 'public_home_summary_only')
         timezone = ZoneInfo('Asia/Taipei')
         today = ctx.now.astimezone(timezone).date()
         posts = posts_today = users = 0
@@ -805,16 +812,6 @@ async def read_segment(ctx, request, tx):
 
     async def list_items(ctx, request, tx, *, arguments=None, budget=None):
         a = dict(request.arguments if arguments is None else arguments)
-        if 'home_summary' in a:
-            require(
-                request.operation == 'discovery.read_query'
-                and request.contract_version == 1
-                and a == {'home_summary': True},
-                'invalid_home_summary',
-            )
-            require(ctx.principal.subject is None, 'public_home_summary_only')
-            return await home(ctx, request, tx)
-
         stable = request.operation == 'discovery.read_query'
         internal_page = getattr(request, 'internal_page_state', None)
         if internal_page is not None:
@@ -957,7 +954,7 @@ async def list_items(ctx, request, tx, *, arguments=None, budget=None):
 
     op('discovery.list', obj(listing), effect='read')(list_items)
     op('discovery.search', obj(listing, ('query',)), effect='read')(list_items)
-    op('discovery.read_query', obj({**listing, 'home_summary': BOOLEAN}), effect='read')(list_items)
+    op('discovery.read_query', obj(listing), effect='read')(list_items)
 
     nested_schema = obj(
         {
diff --git a/src/msg/transports/http_routes.py b/src/msg/transports/http_routes.py
index f22d285d..d1ddf7b1 100644
--- a/src/msg/transports/http_routes.py
+++ b/src/msg/transports/http_routes.py
@@ -1764,10 +1764,15 @@ async def dispatch(request: Request):
                     if header:
                         packet = path_packet(header, 'j', limits.max_request_bytes)
                         require(packet.operation == spec.name, 'operation_mismatch')
+                        require(packet.contract_version == spec.version, 'representation_mismatch')
                         require(dict(packet.arguments) == args, 'representation_mismatch')
                     else:
                         packet = request_for(
-                            spec.name, args, service.settings.service_url, source='manual'
+                            spec.name,
+                            args,
+                            service.settings.service_url,
+                            source='manual',
+                            contract_version=spec.version,
                         )
                 result = await service.executor.execute(packet, entry='network')
                 value = result_wire(result)
@@ -1791,6 +1796,7 @@ async def dispatch(request: Request):
                     {'home_summary': True},
                     service.settings.service_url,
                     source='manual',
+                    contract_version=4,
                 )
                 result = await service.executor.execute(packet, entry='network')
                 if result.error and result.error.code != 'query_cost_exceeded':
diff --git a/tests/test_branding.py b/tests/test_branding.py
index 4ef9bb0c..3e5198f1 100644
--- a/tests/test_branding.py
+++ b/tests/test_branding.py
@@ -9,7 +9,9 @@
 import pytest
 from test_service import NOW, call, register
 
-from msg.core.codec import canonical, wire
+from msg.core.codec import b64, canonical, wire
+from msg.core.requests import request_for
+from msg.transports.dictionary import build_dictionary
 from msg.transports.http import create_app
 
 
@@ -217,11 +219,43 @@ async def test_home_summary_uses_existing_read_authority_and_remains_public(inst
     app, _ = installed
     assert all(operation.name != 'discovery.home' for operation in app.registry.operations())
     key, uid, cert = await register(app, 'home-summary-reader')
-    anonymous = await call(app, 'discovery.read_query', {'home_summary': True})
+    anonymous = await call(app, 'discovery.read_query', {'home_summary': True}, contract_version=4)
     assert anonymous.status == 'ok' and 'posts' in anonymous.data
     authenticated = await call(
-        app, 'discovery.read_query', {'home_summary': True}, key=key, subject=uid, certs=(cert,)
+        app,
+        'discovery.read_query',
+        {'home_summary': True},
+        key=key,
+        subject=uid,
+        certs=(cert,),
+        contract_version=4,
     )
     assert authenticated.error.code == 'public_home_summary_only'
-    mixed = await call(app, 'discovery.read_query', {'home_summary': True, 'parent': '/main'})
-    assert mixed.error.code == 'invalid_home_summary'
+    mixed = await call(
+        app, 'discovery.read_query', {'home_summary': True, 'parent': '/main'}, contract_version=4
+    )
+    assert mixed.error.code == 'schema_validation'
+    for args in ({}, {'home_summary': False}):
+        invalid = await call(app, 'discovery.read_query', args, contract_version=4)
+        assert invalid.error.code == 'schema_validation'
+    legacy = await call(app, 'discovery.read_query', {'home_summary': True})
+    assert legacy.error.code == 'schema_validation'
+    dictionary = build_dictionary(app.registry)
+    direct_path = next(
+        row['example']
+        for row in dictionary.document['operations']
+        if row['name'] == 'discovery.read_query' and row['version'] == 4
+    )
+    wrong_version = request_for(
+        'discovery.read_query', {'home_summary': True}, app.settings.service_url
+    )
+    async with httpx.AsyncClient(
+        transport=httpx.ASGITransport(app=create_app(app)), base_url=app.settings.service_url
+    ) as http:
+        direct = await http.get(direct_path)
+        assert direct.status_code == 200 and 'posts' in direct.json()['data']
+        mismatched = await http.get(
+            direct_path, headers={'X-Msg-Request': b64(canonical(wrong_version))}
+        )
+        assert mismatched.status_code == 400
+        assert mismatched.json()['error']['code'] == 'representation_mismatch'
diff --git a/tests/test_nginx_secret_logs.py b/tests/test_nginx_secret_logs.py
index 46a27377..fbe2185e 100644
--- a/tests/test_nginx_secret_logs.py
+++ b/tests/test_nginx_secret_logs.py
@@ -157,9 +157,10 @@ def recovery_drill_active(self):
         async def execute(self, packet, *, entry):
             # The homepage is the only read exercised by this boundary fixture.
             # Any attempted business execution still fails immediately.
-            assert packet.operation == 'discovery.home'
+            assert packet.operation == 'discovery.read_query'
+            assert packet.contract_version == 4
             assert entry == 'network'
-            assert not packet.arguments
+            assert packet.arguments == {'home_summary': True}
             return SimpleNamespace(
                 error=None,
                 data={
diff --git a/tests/test_request_target_safety.py b/tests/test_request_target_safety.py
index c18e339e..1f0c60f8 100644
--- a/tests/test_request_target_safety.py
+++ b/tests/test_request_target_safety.py
@@ -27,9 +27,10 @@ def recovery_drill_active(self):
         async def execute(self, packet, *, entry):
             # The homepage is the only read exercised by this boundary fixture.
             # Any attempted business execution still fails immediately.
-            assert packet.operation == 'discovery.home'
+            assert packet.operation == 'discovery.read_query'
+            assert packet.contract_version == 4
             assert entry == 'network'
-            assert not packet.arguments
+            assert packet.arguments == {'home_summary': True}
             return SimpleNamespace(
                 error=None,
                 data={