diff --git a/docs/runtime-telemetry-history.md b/docs/runtime-telemetry-history.md
index c9e3333..8575faa 100644
--- a/docs/runtime-telemetry-history.md
+++ b/docs/runtime-telemetry-history.md
@@ -82,7 +82,11 @@ Newer Orchestrator feeds can also declare `edgeenv_mapping_hint` fields. EdgeEnv
 preserves these hints and validates them when present: Orchestrator may map only
 supplemental candidate operation context to
 `runtime_telemetry_context.candidate`, while EdgeEnv remains the owner of
-`runtime_telemetry_context.history.telemetry_coverage`.
+`runtime_telemetry_context.history.telemetry_coverage`. When the feed declares
+`candidate_context_required_fields`, EdgeEnv checks that the mapping hint and the
+candidate context still include `run_id`, `telemetry_source`, `operation`, and
+`resource` before the context can reach regression reports or Lab handoff
+manifests.
 
 Replay validation command:
 
@@ -121,8 +125,15 @@ The history artifact uses this top-level shape:
         "not_a_comparability_gate": true,
         "edgeenv_mapping_hint": {
           "copy_candidate_context_to": "runtime_telemetry_context.candidate",
+          "operation_context_role": "supplemental",
           "coverage_summary_owner": "edgeenv",
-          "coverage_summary_path": "runtime_telemetry_context.history.telemetry_coverage"
+          "coverage_summary_path": "runtime_telemetry_context.history.telemetry_coverage",
+          "candidate_context_required_fields": [
+            "run_id",
+            "telemetry_source",
+            "operation",
+            "resource"
+          ]
         }
       }
     }
diff --git a/tests/test_regression.py b/tests/test_regression.py
index f2687f7..622b3f2 100644
--- a/tests/test_regression.py
+++ b/tests/test_regression.py
@@ -16,6 +16,7 @@
     ORCHESTRATOR_EDGEENV_COVERAGE_SUMMARY_OWNER,
     ORCHESTRATOR_EDGEENV_HISTORY_COVERAGE_PATH,
     ORCHESTRATOR_EDGEENV_OPERATION_CONTEXT_ROLE,
+    ORCHESTRATOR_EDGEENV_REQUIRED_CANDIDATE_FIELDS,
 )
 from inferedge_env.result.writer import ResultArtifactWriter
 from inferedge_env.runners.base import RunnerResult
@@ -271,9 +272,18 @@ def test_regression_attaches_orchestrator_feed_as_supplemental_context(
     assert candidate_context["orchestrator_operation_context"]["edgeenv_mapping_hint"][
         "coverage_summary_path"
     ] == ORCHESTRATOR_EDGEENV_HISTORY_COVERAGE_PATH
+    assert candidate_context["orchestrator_operation_context"]["edgeenv_mapping_hint"][
+        "operation_context_role"
+    ] == ORCHESTRATOR_EDGEENV_OPERATION_CONTEXT_ROLE
+    assert candidate_context["orchestrator_operation_context"]["edgeenv_mapping_hint"][
+        "candidate_context_required_fields"
+    ] == [*ORCHESTRATOR_EDGEENV_REQUIRED_CANDIDATE_FIELDS]
     assert candidate_context["orchestrator_operation_context"]["candidate_context"][
         "operation"
     ]["queue_depth"] == 7
+    assert candidate_context["orchestrator_operation_context"]["candidate_context"][
+        "telemetry_source"
+    ] == "inferedge_orchestrator_operation_summary"
     assert (
         "Orchestrator operation context is supplemental evidence, not a regression judgement."
         in context["notes"]
diff --git a/tests/test_runtime_intelligence_lab_handoff.py b/tests/test_runtime_intelligence_lab_handoff.py
index 4b5f137..68a9e4a 100644
--- a/tests/test_runtime_intelligence_lab_handoff.py
+++ b/tests/test_runtime_intelligence_lab_handoff.py
@@ -166,6 +166,34 @@ def test_runtime_intelligence_lab_handoff_rejects_bad_orchestrator_mapping(
         )
 
 
+def test_runtime_intelligence_lab_handoff_rejects_incomplete_mapping_required_fields(
+    tmp_path,
+):
+    baseline_path, candidate_path, regression_path, history_path = _write_handoff_files(
+        tmp_path
+    )
+    regression = json.loads(regression_path.read_text(encoding="utf-8"))
+    regression["runtime_telemetry_context"]["candidate"][
+        "orchestrator_operation_context"
+    ]["edgeenv_mapping_hint"]["candidate_context_required_fields"] = [
+        "run_id",
+        "operation",
+        "resource",
+    ]
+    regression_path.write_text(json.dumps(regression), encoding="utf-8")
+
+    with pytest.raises(
+        RuntimeIntelligenceLabHandoffError,
+        match="candidate_context_required_fields must include telemetry_source",
+    ):
+        build_runtime_intelligence_lab_handoff_manifest(
+            baseline_result_path=baseline_path,
+            candidate_result_path=candidate_path,
+            edgeenv_regression_report_path=regression_path,
+            telemetry_history_path=history_path,
+        )
+
+
 def _write_handoff_files(tmp_path):
     baseline_path = tmp_path / "baseline-result.json"
     candidate_path = tmp_path / "candidate-result.json"
diff --git a/tests/test_runtime_telemetry_history.py b/tests/test_runtime_telemetry_history.py
index 5505a75..ac49d2e 100644
--- a/tests/test_runtime_telemetry_history.py
+++ b/tests/test_runtime_telemetry_history.py
@@ -14,6 +14,7 @@
     ORCHESTRATOR_EDGEENV_COVERAGE_SUMMARY_OWNER,
     ORCHESTRATOR_EDGEENV_HISTORY_COVERAGE_PATH,
     ORCHESTRATOR_EDGEENV_OPERATION_CONTEXT_ROLE,
+    ORCHESTRATOR_EDGEENV_REQUIRED_CANDIDATE_FIELDS,
     ORCHESTRATOR_TELEMETRY_FEED_SCHEMA_VERSION,
     RUNTIME_TELEMETRY_HISTORY_SCHEMA_VERSION,
     RuntimeTelemetryHistoryError,
@@ -201,6 +202,11 @@ def test_build_runtime_telemetry_history_attaches_orchestrator_feed_context(
     assert context["edgeenv_mapping_hint"]["coverage_summary_path"] == (
         ORCHESTRATOR_EDGEENV_HISTORY_COVERAGE_PATH
     )
+    assert context["edgeenv_mapping_hint"]["candidate_context_required_fields"] == [
+        *ORCHESTRATOR_EDGEENV_REQUIRED_CANDIDATE_FIELDS
+    ]
+    for field in ORCHESTRATOR_EDGEENV_REQUIRED_CANDIDATE_FIELDS:
+        assert field in context["candidate_context"]
     assert "not a regression judgement" in payload["notes"][3]