Document characteristic acceptance boundary

tests/test_acceptance_policy_docs.py

@@ -0,0 +1,17 @@
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+POLICY = ROOT / "docs" / "acceptance-policy.md"
+
+
+def test_acceptance_policy_defines_deterministic_boundary():
+    text = POLICY.read_text(encoding="utf-8")
+
+    assert "Policy version: `acceptance-policy/v1`" in text
+    assert "Deterministic quality gates must not approve" in text
+    assert "`requires_review`" in text
+    assert "`invalidated`" in text
+    assert "`approve_with_edits`" in text
+    assert "`trusted_auto_approve_candidate_graph`" in text
+    assert "legacy terminology" in text