Consolidate Odysseus agent harness and tool contracts

tests/test_event_bus_fixture_isolation.py

@@ -0,0 +1,20 @@
+import asyncio
+
+import src.event_bus as event_bus
+
+
+def test_fixture_owners_do_not_run_event_automations():
+    assert not event_bus._event_automation_enabled_for_owner("sft_alex_creator")
+    assert not event_bus._event_automation_enabled_for_owner("SFT_MAYA_OPS")
+    assert event_bus._event_automation_enabled_for_owner("pewds")
+    assert event_bus._event_automation_enabled_for_owner(None)
+
+
+def test_fixture_event_returns_before_database_access(monkeypatch):
+    import core.database
+
+    def fail_if_opened():
+        raise AssertionError("fixture event must not open a database session")
+
+    monkeypatch.setattr(core.database, "SessionLocal", fail_if_opened)
+    asyncio.run(event_bus._handle_event("session_created", "sft_alex_creator"))