feat: add P2 harness machine contracts

harness/tests/test_qdrant_cli_commands.py

@@ -187,3 +187,37 @@ def test_memory_solved_index_help_uses_semantic_store_wording():
     assert res.exit_code == 0, res.output
     assert "semantic" in res.output.lower() or "qdrant" in res.output.lower()
     assert "vectordb" not in res.output.lower()
+
+
+def test_vector_index_schema_json_is_single_document(monkeypatch, tmp_path):
+    import json
+
+    cfg = _qdrant_runtime_config(tmp_path)
+    _write_schema_artifacts(tmp_path)
+    store = _FakeVectorStore()
+    monkeypatch.setattr("tht.adapters.factory.build_vector_store", lambda cfg, require_write: store)
+    monkeypatch.setattr("tht.cli.vector_cmd.make_embedder", lambda _: _FakeEmbedder())
+    response = CliRunner().invoke(app, ["vector", "index-schema", "--json", "-c", str(cfg)])
+    assert response.exit_code == 0, response.output
+    assert response.stdout.count("\n") == 1
+    payload = json.loads(response.stdout)
+    assert payload["status"] == "succeeded"
+    assert payload["code"] == "ok"
+    assert payload["counts"]["added"] == 2
+
+
+def test_vector_index_schema_json_failure_is_safe(monkeypatch, tmp_path):
+    import json
+
+    cfg = _qdrant_runtime_config(tmp_path)
+    _write_schema_artifacts(tmp_path)
+    monkeypatch.setattr(
+        "tht.adapters.factory.build_vector_store",
+        lambda cfg, require_write: (_ for _ in ()).throw(RuntimeError("secret qdrant endpoint")),
+    )
+    response = CliRunner().invoke(app, ["vector", "index-schema", "--json", "-c", str(cfg)])
+    assert response.exit_code != 0
+    assert response.stdout.count("\n") == 1
+    payload = json.loads(response.stdout)
+    assert payload == {"status": "failed", "code": "schema_index_failed"}
+    assert "secret qdrant" not in response.stdout