diff --git a/application/execution_receipt_adapter.py b/application/execution_receipt_adapter.py
index caa711e..78f4f96 100644
--- a/application/execution_receipt_adapter.py
+++ b/application/execution_receipt_adapter.py
@@ -15,6 +15,15 @@
 _RISK_BLOCKED_STAGES = frozenset({"EXECUTION_BLOCKED", "FUNDING_BLOCKED"})
 
 
+def _is_legacy_unattested(report: Mapping[str, Any]) -> bool:
+    receipt = report.get("runtime_release_receipt")
+    return (
+        isinstance(receipt, Mapping)
+        and receipt.get("attestation_state") == "legacy_unattested"
+        and receipt.get("strategy_release") is None
+    )
+
+
 def attach_strategy_result_execution_receipt(
     report: dict[str, Any],
     result: Mapping[str, Any],
@@ -28,6 +37,9 @@ def attach_strategy_result_execution_receipt(
     never infers an acknowledgement or fill from it.
     """
 
+    if _is_legacy_unattested(report):
+        return report
+
     stage = str(result.get("strategy_run_stage") or "").strip().upper()
     submitted_orders = _as_sequence(result.get("submitted_orders"))
     submission_attempted = bool(
@@ -67,6 +79,9 @@ def attach_strategy_result_execution_receipt(
 def attach_unknown_failure_execution_receipt(report: dict[str, Any]) -> dict[str, Any]:
     """Preserve uncertainty when an exception escapes the strategy cycle."""
 
+    if _is_legacy_unattested(report):
+        return report
+
     outcome, confirmation = resolve_execution_receipt_fact(
         dry_run=bool(report.get("dry_run")),
         submission_attempted=True,
diff --git a/main.py b/main.py
index 65dd9a6..7972cf6 100644
--- a/main.py
+++ b/main.py
@@ -217,7 +217,11 @@ def _runtime_settings(*, dry_run_override: bool | None = None) -> PlatformRuntim
         return settings
     runtime_target = settings.runtime_target
     if runtime_target is not None:
-        runtime_target = replace(runtime_target, dry_run_only=bool(dry_run_override))
+        runtime_target = replace(
+            runtime_target,
+            dry_run_only=bool(dry_run_override),
+            execution_environment="dry_run" if dry_run_override else runtime_target.execution_environment,
+        )
     return replace(
         settings,
         dry_run_only=bool(dry_run_override),
diff --git a/tests/test_execution_receipt_adapter.py b/tests/test_execution_receipt_adapter.py
index 59d80b8..04a59e1 100644
--- a/tests/test_execution_receipt_adapter.py
+++ b/tests/test_execution_receipt_adapter.py
@@ -2,7 +2,10 @@
 
 import unittest
 
-from application.execution_receipt_adapter import attach_strategy_result_execution_receipt
+from application.execution_receipt_adapter import (
+    attach_strategy_result_execution_receipt,
+    attach_unknown_failure_execution_receipt,
+)
 
 
 REVISION = "a" * 40
@@ -22,6 +25,33 @@ def _report() -> dict[str, object]:
 
 
 class ExecutionReceiptAdapterTest(unittest.TestCase):
+    def test_legacy_unattested_results_do_not_fabricate_receipts(self) -> None:
+        for attach in (
+            lambda report: attach_strategy_result_execution_receipt(report, {}, dry_run=False),
+            attach_unknown_failure_execution_receipt,
+        ):
+            report = _report()
+            report["runtime_release_receipt"] = {"attestation_state": "legacy_unattested"}
+            self.assertIs(attach(report), report)
+            self.assertNotIn("execution_receipt", report)
+
+    def test_invalid_attested_revision_still_fails(self) -> None:
+        for revision in (None, "abc1234", "A" * 40):
+            for attach in (
+                lambda report: attach_strategy_result_execution_receipt(report, {}, dry_run=False),
+                attach_unknown_failure_execution_receipt,
+            ):
+                report = _report()
+                report["runtime_release_receipt"]["strategy_release"]["strategy_revision"] = revision
+                with self.assertRaisesRegex(ValueError, "strategy_revision"):
+                    attach(report)
+
+    def test_missing_attestation_is_not_assumed_legacy(self) -> None:
+        report = _report()
+        del report["runtime_release_receipt"]
+        with self.assertRaisesRegex(ValueError, "strategy_revision"):
+            attach_unknown_failure_execution_receipt(report)
+
     def test_submission_is_not_reported_as_a_fill(self) -> None:
         report = _report()
 
diff --git a/tests/test_request_handling.py b/tests/test_request_handling.py
index dc2b3a9..3e0cb30 100644
--- a/tests/test_request_handling.py
+++ b/tests/test_request_handling.py
@@ -29,6 +29,49 @@ def route_methods():
     return {route: sorted(methods) for route, methods in methods_by_route.items()}
 
 
+@pytest.mark.parametrize("dry_run", [False, True])
+@pytest.mark.parametrize("outcome", ["submitted", "blocked", "exception"])
+def test_legacy_cycle_preserves_result_and_report(monkeypatch, dry_run, outcome):
+    persisted = []
+    cycle_calls = []
+    failure = RuntimeError("offline strategy failure")
+    result = {
+        "ok": outcome == "submitted",
+        "strategy_run_stage": "SUBMITTED" if outcome == "submitted" else "EXECUTION_BLOCKED",
+        "submitted_orders": [{"symbol": "IBIT"}] if outcome == "submitted" else [],
+        "execution_blocked": outcome == "blocked",
+    }
+
+    def cycle(**kwargs):
+        cycle_calls.append(kwargs)
+        if outcome == "exception":
+            raise failure
+        return result
+
+    monkeypatch.setattr(main, "run_strategy_cycle", cycle)
+    monkeypatch.setattr(main, "_persist_runtime_report", lambda report: persisted.append(report))
+    if outcome == "exception":
+        with pytest.raises(RuntimeError) as caught:
+            main._run_strategy_cycle_with_report(dry_run_override=dry_run)
+        assert caught.value is failure
+    else:
+        assert main._run_strategy_cycle_with_report(dry_run_override=dry_run) is result
+
+    assert len(cycle_calls) == 1
+    if dry_run:
+        settings = cycle_calls[0]["runtime_settings"]
+        assert settings.live_trading_enabled is False
+        assert settings.runtime_target.execution_environment.value == "dry_run"
+    assert len(persisted) == 1
+    report = persisted[0]
+    assert report["runtime_release_receipt"]["attestation_state"] == "legacy_unattested"
+    assert "execution_receipt" not in report
+    assert report["dry_run"] is dry_run
+    assert report["status"] == ("ok" if outcome == "submitted" else "error")
+    if outcome == "exception":
+        assert report["errors"][0]["error_type"] == "RuntimeError"
+
+
 def test_cloud_run_route_contracts_are_registered():
     assert route_methods() == {
         "/": ["GET"],