no-mistakes(review): Derive model fields recursively; fix historical latency and key claims

tests/test_audit_hermes_config_alias.py

@@ -143,3 +143,46 @@ def test_raw_alias_is_rejected(tmp_path):
     assert "model.default = 'qwen3.6-27B-code'" in out
     assert "gpu-dense" in out
     assert "RESULT: FAIL" in out
+
+
+def test_retired_alias_in_fallback_providers_is_rejected(tmp_path):
+    """fallback_providers.model is model-bearing; a retired name there must fail."""
+    code, out = _run_config(
+        tmp_path,
+        "fallback-gpu-light.yaml",
+        BASE.format(alias="gpu-vision").replace("  model: deepseek-v4-flash", "  model: gpu-light"),
+    )
+    assert code == 1, out
+    assert "fallback_providers.model = 'gpu-light'" in out
+    assert "RESULT: FAIL" in out
+
+
+def test_retired_alias_in_x_search_is_rejected(tmp_path):
+    """x_search.model was previously not enumerated; the derivation must catch it."""
+    code, out = _run_config(
+        tmp_path,
+        "x-search-gpu-light.yaml",
+        BASE.format(alias="gpu-vision").replace(
+            "delegation:\n  provider: harness",
+            "delegation:\n  provider: harness\nx_search:\n  model: gpu-light",
+        ),
+    )
+    assert code == 1, out
+    assert "x_search.model = 'gpu-light'" in out
+    assert "RESULT: FAIL" in out
+
+
+def test_retired_alias_in_nested_auxiliary_block_is_rejected(tmp_path):
+    """A nested auxiliary sub-block outside the named three must still be derived."""
+    code, out = _run_config(
+        tmp_path,
+        "nested-aux-gpu-light.yaml",
+        BASE.format(alias="gpu-vision").replace(
+            "  compression:\n    model: syslog-auto\n    provider: harness\ndelegation:",
+            "  compression:\n    model: syslog-auto\n    provider: harness\n"
+            "  tasks:\n    summarize:\n      model: gpu-light\ndelegation:",
+        ),
+    )
+    assert code == 1, out
+    assert "auxiliary.tasks.summarize.model = 'gpu-light'" in out
+    assert "RESULT: FAIL" in out