fix(retirement): close projection and launch contract gaps

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a02b7c-1c49-76a0-955a-49e7b3ddfc0d

tests/test_routers_core.py

@@ -1006,7 +1006,7 @@ class TestReconciliationEndpoints:
 
 
 class TestExecutionQueueEndpoints:
-    async def test_execution_semantics_separates_state_hub_and_activity_core(self, client):
+    async def test_execution_semantics_retires_workplan_launch_pickup(self, client):
         r = await client.get("/execution/semantics")
 
         assert r.status_code == 200
@@ -1014,8 +1014,15 @@ class TestExecutionQueueEndpoints:
         assert "queued" in body["execution_states"]
         assert "immediate" in body["launch_modes"]
         assert "parallel" in body["concurrency_modes"]
-        assert any("launch requests" in item for item in body["state_hub_responsibility"])
-        assert any("dispatch" in item for item in body["activity_core_responsibility"])
+        assert body["launch_requests_accepted"] is False
+        assert "authoritative repository file" in body["replacements"][
+            "POST /execution/launch-requests"
+        ]
+        assert any(
+            "reject new workplan launch" in item
+            for item in body["state_hub_responsibility"]
+        )
+        assert any("do not consume" in item for item in body["activity_core_responsibility"])
 
     async def test_execution_intent_update_does_not_change_lifecycle_status(self, client):
         await _create_domain(client)
@@ -1107,7 +1114,7 @@ class TestExecutionQueueEndpoints:
         assert rows[2]["eligible"] is False
         assert rows[2]["blocked_by_workstream_ids"] == [dependency["id"]]
 
-    async def test_launch_request_records_handoff_and_updates_execution_intent(self, client):
+    async def test_launch_request_is_gone_and_does_not_update_execution_intent(self, client):
         await _create_domain(client)
         topic = await _create_topic(client)
         ws = await _create_workstream(client, topic["id"], status="ready")
@@ -1124,21 +1131,18 @@ class TestExecutionQueueEndpoints:
             "notes": "start now",
         })
 
-        assert r.status_code == 201, r.text
-        body = r.json()
-        assert body["workstream_id"] == ws["id"]
-        assert body["launch_mode"] == "immediate"
-        assert body["immediate_pickup"] is True
-        assert body["status"] == "requested"
+        assert r.status_code == 410, r.text
+        assert "no consumer picks up these rows" in r.json()["detail"]
+        assert "repo file queue" in r.headers["x-statehub-replacement"]
 
         r = await client.get(f"/workplans/{ws['id']}")
         updated = r.json()
         assert updated["status"] == "ready"
-        assert updated["execution_state"] == "launching"
-        assert updated["launch_mode"] == "immediate"
+        assert updated["execution_state"] == "manual"
+        assert updated["launch_mode"] == "manual"
 
         r = await client.get(f"/execution/launch-requests?workstream_id={ws['id']}")
-        assert len(r.json()) == 1
+        assert r.json() == []
 
 
 def _fabric_graph_export(generated_at="2026-05-23T12:00:00Z", extra_node=False):