Implement KG-WP-0002 posture pilot scaffold

tests/test_contracts.py

@@ -0,0 +1,48 @@
+from kings_guard.adapters import observation_from_audit_event
+from kings_guard.contracts import PostureLevel, SecurityGenome, as_jsonable
+from kings_guard.fixtures import load_qonto_assistant_pilot
+from kings_guard.posture import PostureEvaluator
+
+
+def test_qonto_fixture_loads_a_normalized_genome() -> None:
+    fixture = load_qonto_assistant_pilot()
+
+    assert isinstance(fixture.genome, SecurityGenome)
+    assert fixture.genome.genome_id == "kg:genome:qonto-assistant"
+    assert fixture.genome.tenant_id == "binky"
+    assert "finance.qonto.read" in fixture.genome.permitted_capabilities
+    assert fixture.normalization_hints["identity_binding"] == "self_asserted"
+
+
+def test_qonto_audit_event_normalizes_to_immune_observation() -> None:
+    fixture = load_qonto_assistant_pilot()
+    observation = observation_from_audit_event(
+        fixture.audit_event,
+        subject_id=fixture.normalization_hints["subject_id"],
+        capability_scope=fixture.normalization_hints["capability_scope"],
+        identity_binding=fixture.normalization_hints["identity_binding"],
+        egress_destination=fixture.normalization_hints["egress_destination"],
+    )
+
+    assert observation.source_system == "qonto-assistant"
+    assert observation.capability == "finance.qonto.read"
+    assert observation.resource_scope == "org_summary"
+    assert observation.protocol == "mcp"
+    assert observation.decision.value == "deny"
+    assert observation.deny_reason == "credential_exfil"
+
+
+def test_posture_evaluation_is_jsonable() -> None:
+    fixture = load_qonto_assistant_pilot()
+    observation = observation_from_audit_event(
+        fixture.audit_event,
+        subject_id=fixture.normalization_hints["subject_id"],
+        capability_scope=fixture.normalization_hints["capability_scope"],
+        identity_binding=fixture.normalization_hints["identity_binding"],
+        egress_destination=fixture.normalization_hints["egress_destination"],
+    )
+    evaluation = PostureEvaluator().evaluate(fixture.genome, observation)
+    payload = as_jsonable(evaluation)
+
+    assert payload["assessment"]["posture"] == PostureLevel.INFLAMED.value
+    assert payload["signals"][0]["signal_kind"] == "posture_hint"