Extend oracle gap P06 bracket

tests/test_oracle_gap.py

@@ -9,6 +9,7 @@ ORACLE_GAP = Path(__file__).resolve().parents[1] / "scripts/oracle_gap"
 sys.path.insert(0, str(ORACLE_GAP))
 
 from analyze import score_trial, summarize_trials  # noqa: E402
+from run_frontier import UP_EXTENSIONS, resume_compatible  # noqa: E402
 
 
 def _request(
@@ -141,3 +142,29 @@ def test_nonmonotone_frontier_blocks_inference() -> None:
 
     assert summary["verdict"] == "INCONCLUSIVE"
     assert not summary["sanity"]["invariants"]["all_frontiers_monotone"]
+
+
+def test_a_og_1_extends_only_mutable_resume_fields() -> None:
+    immutable = {
+        "p5_client_sha256": "p5",
+        "p3_client_sha256": "p3",
+        "vllm_commit": "vllm",
+        "model": "model",
+        "manifests": {"P01": "a", "P06": "b"},
+        "runtime": "runtime",
+        "driver": "driver",
+        "config_details": {"C00": {}},
+        "base_rates": {"P01": [26], "P06": [1.4]},
+    }
+    amended = {
+        **immutable,
+        "controller_sha256": "new",
+        "repo_commit": "new",
+        "up_extensions": {"P06": [2.4]},
+    }
+
+    assert UP_EXTENSIONS["P06"][-5:] == (2.4, 2.5, 2.6, 2.8, 3.0)
+    assert resume_compatible(immutable, amended)
+    assert not resume_compatible(
+        immutable, {**amended, "manifests": {"P01": "changed"}}
+    )