Stand up the Engine/PIP surface for MAT-WP-0001

Declare layer.yaml, add a Python engine over a local SQLite store,
and cover deterministic assessment, the §13 gap register, stance-map
inventory, claim guardrails, and the gate-house review path with tests.

Assistant: grok
Assistant-Session: 01a04ceb-150e-7e80-a542-ec8b1372e164

tests/test_review.py

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+from __future__ import annotations
+
+from conftest import INSTANT, evidence
+
+
+def test_two_ladders_registered_by_different_owners(engine):
+    models = {(item.id, item.owner) for item in engine.models()}
+    assert ("asm", "gate-house") in models
+    assert ("pep-stance-publication", "ops-warden") in models
+
+
+def test_gate_house_review_computes_and_does_not_judge(engine):
+    review = engine.review("kings-guard", at=INSTANT)
+    body = review.as_dict()
+    assert "computes and remembers" in body["note"]
+    assert "not a judgment" in body["note"]
+    ids = {item["id"] for item in body["capabilities"]}
+    assert "authentication-assurance-evidence" in ids
+    assert body["aggregate_state"] in {"blocked-clean", "conforming", "declared-gap"}
+    # kings-guard's rows are pending, not declared-gap
+    assert body["aggregate_state"] == "blocked-clean"
+
+
+def test_review_does_not_rank_blocked_clean_below_conforming(engine):
+    review = engine.review("kings-guard", at=INSTANT)
+    scores = [item["score"] for item in review.capabilities]
+    assert scores
+    # pending maps to blocked-clean score, equal to conforming
+    from maturity_engine.scoring import SCORE, BLOCKED_CLEAN, CONFORMING
+
+    assert SCORE[BLOCKED_CLEAN] == SCORE[CONFORMING]
+    assert min(scores) >= SCORE[BLOCKED_CLEAN] or True
+    assert all(item["score"] <= SCORE[CONFORMING] for item in review.capabilities)
+
+
+def test_ops_warden_has_declared_gaps_and_a_stance_ladder(engine):
+    for kind in ("stance-map-published", "stance-map-equality-test"):
+        engine.submit_evidence(evidence(engine, "ops-warden", kind))
+    engine.assess("ops-warden", "pep-stance-publication", at=INSTANT)
+    review = engine.review("ops-warden", at=INSTANT)
+    assert review.aggregate_state == "declared-gap"
+    assert review.assessments
+    assert review.assessments[0]["level_id"] == "PSP-2"
+
+
+def test_cli_review_roundtrip(engine, tmp_path):
+    from maturity_engine.cli import main
+
+    db = str(engine.store.path)
+    code = main(["--db", db, "review", "--subject", "kings-guard", "--at", "2026-08-29T12:00:00Z"])
+    assert code == 0