fix(workflows): validate persisted step result shapes (#4399)

Reject non-object step_results values and per-step records at the
RunState load boundary. Preserve valid mappings and the legacy empty
default when the field is omitted.

Co-authored-by: WOLIKIMCHENG <kinsonnee@gmail.com>

Author: WOLIKIMCHENG

src/specify_cli/workflows/engine.py

@@ -849,6 +849,18 @@ def load(cls, run_id: str, project_root: Path) -> RunState:
         installed_workflow_id = state_data.get("installed_workflow_id")
         installed_registry_root = state_data.get("installed_registry_root")
 
+        step_results = state_data.get("step_results", {})
+        if not isinstance(step_results, dict):
+            raise ValueError(
+                "Invalid run state: 'step_results' must be a JSON object"
+            )
+        for step_id, result in step_results.items():
+            if not isinstance(result, dict):
+                raise ValueError(
+                    "Invalid run state: step_results record "
+                    f"{step_id!r} must be a JSON object"
+                )
+
         state = cls(
             run_id=state_data["run_id"],
             workflow_id=workflow_id,
@@ -875,7 +887,7 @@ def load(cls, run_id: str, project_root: Path) -> RunState:
             )
         state.current_step_index = current_step_index
         state.current_step_id = state_data.get("current_step_id")
-        state.step_results = state_data.get("step_results", {})
+        state.step_results = step_results
         state.workflow_dir = state_data.get("workflow_dir")
         state.created_at = state_data.get("created_at", "")
         state.updated_at = state_data.get("updated_at", "")

tests/test_workflows.py

@@ -7681,7 +7681,70 @@ def test_save_and_load(self, project_dir):
         assert loaded.workflow_id == "test-workflow"
         assert loaded.status == RunStatus.RUNNING
         assert loaded.inputs == {"name": "login"}
-        assert "step-one" in loaded.step_results
+        assert loaded.step_results == state.step_results
+
+    @pytest.mark.parametrize("invalid_step_results", [None, [], "invalid", 1, True])
+    def test_load_rejects_non_object_step_results(
+        self, project_dir, invalid_step_results
+    ):
+        """Persisted step results must be a JSON object."""
+        from specify_cli.workflows.engine import RunState
+
+        state = RunState(
+            run_id="invalid-results",
+            workflow_id="test-workflow",
+            project_root=project_dir,
+        )
+        state.save()
+        state_path = state.runs_dir / "state.json"
+        state_data = json.loads(state_path.read_text(encoding="utf-8"))
+        state_data["step_results"] = invalid_step_results
+        state_path.write_text(json.dumps(state_data), encoding="utf-8")
+
+        with pytest.raises(ValueError, match="step_results.*JSON object"):
+            RunState.load("invalid-results", project_dir)
+
+    @pytest.mark.parametrize("invalid_result", [None, [], "invalid", 1, True])
+    def test_load_rejects_non_object_step_result_records(
+        self, project_dir, invalid_result
+    ):
+        """Each persisted step result must be a JSON object."""
+        from specify_cli.workflows.engine import RunState
+
+        state = RunState(
+            run_id="invalid-record",
+            workflow_id="test-workflow",
+            project_root=project_dir,
+        )
+        state.save()
+        state_path = state.runs_dir / "state.json"
+        state_data = json.loads(state_path.read_text(encoding="utf-8"))
+        state_data["step_results"] = {"step-one": invalid_result}
+        state_path.write_text(json.dumps(state_data), encoding="utf-8")
+
+        with pytest.raises(
+            ValueError,
+            match="step_results record 'step-one' must be a JSON object",
+        ):
+            RunState.load("invalid-record", project_dir)
+
+    def test_load_defaults_missing_step_results_for_legacy_state(self, project_dir):
+        """Legacy states without step results load with an empty mapping."""
+        from specify_cli.workflows.engine import RunState
+
+        state = RunState(
+            run_id="legacy-results",
+            workflow_id="test-workflow",
+            project_root=project_dir,
+        )
+        state.save()
+        state_path = state.runs_dir / "state.json"
+        state_data = json.loads(state_path.read_text(encoding="utf-8"))
+        state_data.pop("step_results")
+        state_path.write_text(json.dumps(state_data), encoding="utf-8")
+
+        loaded = RunState.load("legacy-results", project_dir)
+        assert loaded.step_results == {}
 
     def test_load_not_found(self, project_dir):
         from specify_cli.workflows.engine import RunState