diff --git a/reproducibility/data/manifest.json b/reproducibility/data/manifest.json
index 7eca052..5646348 100644
--- a/reproducibility/data/manifest.json
+++ b/reproducibility/data/manifest.json
@@ -1,6 +1,6 @@
 {
-  "content_hash": "bf8a69ea2a8d4191400848b0275b78b01698b0d9286c90a5e58ce4f5d13d4142",
-  "generated_at": "2026-06-18T02:48:37Z",
+  "content_hash": "3beb9828d1ab49f0cdf29807467b3706e6574068fcaf02fc2187e6b1323f1b92",
+  "generated_at": "2026-06-19T16:15:27Z",
   "querygym_version": "0.1.0",
   "row_count": 2270,
   "run_count": 1150,
diff --git a/reproducibility/data/results.csv b/reproducibility/data/results.csv
index c422498..8583bcd 100644
--- a/reproducibility/data/results.csv
+++ b/reproducibility/data/results.csv
@@ -904,8 +904,8 @@ schema_version,run_id,dataset_id,method_id,model,retriever_id,retriever,params_h
 1,4433c120e4ab9ff0,beir-v1.0.0-scifact,query2doc,openai/gpt-4.1-nano,splade-pp,SPLADE++,03ac266c,"{""collection_path"":""msmarco/collection.tsv"",""dataset_type"":""msmarco"",""mode"":""fs"",""num_examples"":4,""train_qrels_path"":""msmarco/qrels.train.tsv"",""train_queries_path"":""msmarco/queries.train.tsv"",""train_split"":""train""}",1.0,128,recall_100,0.94,300,0.0,legacy-backfill,reproducibility/data/runs/beir-v1.0.0-scifact/query2doc/openai/gpt-4.1-nano/splade-pp/03ac266c.json
 1,adae675b937bb6dd,beir-v1.0.0-scifact,query2doc,openai/gpt-4.1-nano,splade-pp,SPLADE++,5e04bb35,"{""mode"":""cot"",""num_examples"":4,""train_split"":""train""}",1.0,128,ndcg_cut_10,0.7065,300,0.0,legacy-backfill,reproducibility/data/runs/beir-v1.0.0-scifact/query2doc/openai/gpt-4.1-nano/splade-pp/5e04bb35.json
 1,adae675b937bb6dd,beir-v1.0.0-scifact,query2doc,openai/gpt-4.1-nano,splade-pp,SPLADE++,5e04bb35,"{""mode"":""cot"",""num_examples"":4,""train_split"":""train""}",1.0,128,recall_100,0.9433,300,0.0,legacy-backfill,reproducibility/data/runs/beir-v1.0.0-scifact/query2doc/openai/gpt-4.1-nano/splade-pp/5e04bb35.json
-1,5e651b293bffa080,beir-v1.0.0-scifact,query2doc,openai/gpt-4.1-nano,splade-pp,SPLADE++,a5413fcf,"{""mode"":""zs"",""num_examples"":4,""train_split"":""train""}",1.0,128,ndcg_cut_10,23.0,300,0.0,legacy-backfill,reproducibility/data/runs/beir-v1.0.0-scifact/query2doc/openai/gpt-4.1-nano/splade-pp/a5413fcf.json
-1,5e651b293bffa080,beir-v1.0.0-scifact,query2doc,openai/gpt-4.1-nano,splade-pp,SPLADE++,a5413fcf,"{""mode"":""zs"",""num_examples"":4,""train_split"":""train""}",1.0,128,recall_100,0.9493,300,0.0,legacy-backfill,reproducibility/data/runs/beir-v1.0.0-scifact/query2doc/openai/gpt-4.1-nano/splade-pp/a5413fcf.json
+1,c46db351c9adb090,beir-v1.0.0-scifact,query2doc,openai/gpt-4.1-nano,splade-pp,SPLADE++,a5413fcf,"{""mode"":""zs"",""num_examples"":4,""train_split"":""train""}",1.0,128,ndcg_cut_10,0.7116,300,0.0,legacy-backfill,reproducibility/data/runs/beir-v1.0.0-scifact/query2doc/openai/gpt-4.1-nano/splade-pp/a5413fcf.json
+1,c46db351c9adb090,beir-v1.0.0-scifact,query2doc,openai/gpt-4.1-nano,splade-pp,SPLADE++,a5413fcf,"{""mode"":""zs"",""num_examples"":4,""train_split"":""train""}",1.0,128,recall_100,0.9493,300,0.0,legacy-backfill,reproducibility/data/runs/beir-v1.0.0-scifact/query2doc/openai/gpt-4.1-nano/splade-pp/a5413fcf.json
 1,54b3cb89c8c63f5c,beir-v1.0.0-scifact,query2e,Qwen/Qwen2.5-72B-Instruct,bge-base-en-v1.5,BGE-base-en-v1.5,eaea15f7,"{""num_examples"":4,""train_split"":""train""}",1.0,128,ndcg_cut_10,0.7382,300,0.0,legacy-backfill,reproducibility/data/runs/beir-v1.0.0-scifact/query2e/Qwen/Qwen2.5-72B-Instruct/bge-base-en-v1.5/eaea15f7.json
 1,54b3cb89c8c63f5c,beir-v1.0.0-scifact,query2e,Qwen/Qwen2.5-72B-Instruct,bge-base-en-v1.5,BGE-base-en-v1.5,eaea15f7,"{""num_examples"":4,""train_split"":""train""}",1.0,128,recall_100,0.9567,300,0.0,legacy-backfill,reproducibility/data/runs/beir-v1.0.0-scifact/query2e/Qwen/Qwen2.5-72B-Instruct/bge-base-en-v1.5/eaea15f7.json
 1,c9364b60bcba9cc6,beir-v1.0.0-scifact,query2e,Qwen/Qwen2.5-72B-Instruct,bm25,BM25,bedaf076,"{""judge_rel_mode"":""positive"",""num_examples"":4,""train_split"":""train""}",1.0,128,ndcg_cut_10,0.6969,300,0.0,legacy-backfill,reproducibility/data/runs/beir-v1.0.0-scifact/query2e/Qwen/Qwen2.5-72B-Instruct/bm25/bedaf076.json
diff --git a/reproducibility/data/runs/beir-v1.0.0-scifact/query2doc/openai/gpt-4.1-nano/splade-pp/a5413fcf.json b/reproducibility/data/runs/beir-v1.0.0-scifact/query2doc/openai/gpt-4.1-nano/splade-pp/a5413fcf.json
index c910b99..a80ff4c 100644
--- a/reproducibility/data/runs/beir-v1.0.0-scifact/query2doc/openai/gpt-4.1-nano/splade-pp/a5413fcf.json
+++ b/reproducibility/data/runs/beir-v1.0.0-scifact/query2doc/openai/gpt-4.1-nano/splade-pp/a5413fcf.json
@@ -1,6 +1,6 @@
 {
   "schema_version": 1,
-  "run_id": "5e651b293bffa080",
+  "run_id": "c46db351c9adb090",
   "params_hash": "a5413fcf",
   "submitted_at": "2026-05-19T00:00:00Z",
   "querygym_version": "legacy-backfill",
@@ -44,7 +44,7 @@
     }
   },
   "metrics": {
-    "ndcg_cut_10": 23.0,
+    "ndcg_cut_10": 0.7116,
     "recall_100": 0.9493
   },
   "timing": {},
diff --git a/reproducibility/lib/validate.py b/reproducibility/lib/validate.py
index e7e7482..a3a7505 100644
--- a/reproducibility/lib/validate.py
+++ b/reproducibility/lib/validate.py
@@ -99,6 +99,7 @@ def validate(
     """
     _jsonschema_validate(payload)
     _validate_no_absolute_paths(payload)
+    _validate_metric_ranges(payload)
 
     if not skip_registry_checks:
         if dataset_registry is None:
@@ -172,6 +173,28 @@ def _validate_registries(
         )
 
 
+def _validate_metric_ranges(payload: Mapping[str, Any]) -> None:
+    """Reject metric values outside [0, 1].
+
+    Every metric on the leaderboard (nDCG, recall, MAP, …) is a normalized
+    ranking score bounded in [0, 1]. The JSON Schema only types these as
+    `number`, so a corrupt value (e.g. a missing decimal point producing 23.0)
+    would otherwise pass schema validation and silently inflate aggregates. This
+    guard catches it at validate time so the aggregator and CI block any run that
+    carries an impossible score."""
+    offenders = [
+        f"{name}={value}"
+        for name, value in payload["metrics"].items()
+        if not (0.0 <= float(value) <= 1.0)
+    ]
+    if offenders:
+        raise ValidationError(
+            f"metric value(s) outside [0, 1]: {sorted(offenders)}. "
+            "All ranking metrics are normalized scores; a value out of range "
+            "indicates a corrupt or mis-scaled result."
+        )
+
+
 def _validate_no_absolute_paths(payload: Mapping[str, Any]) -> None:
     """Reject machine-specific absolute paths in the config — run identities
     must be host-independent. build_run_summary normalizes these automatically;
diff --git a/reproducibility/tests/test_repro_schema.py b/reproducibility/tests/test_repro_schema.py
index 65a64ee..0fc42cc 100644
--- a/reproducibility/tests/test_repro_schema.py
+++ b/reproducibility/tests/test_repro_schema.py
@@ -182,6 +182,33 @@ def test_validator_rejects_metric_outside_eval_metrics():
         validate(payload)
 
 
+def test_validator_rejects_metric_above_one():
+    """A corrupt score (e.g. 23.0 from a dropped decimal point) must be caught —
+    every ranking metric is normalized to [0, 1]."""
+    payload = _load_fixture()
+    payload["metrics"]["ndcg_cut_10"] = 23.0
+    payload["run_id"] = compute_run_id(payload)
+    with pytest.raises(ValidationError, match=r"outside \[0, 1\]"):
+        validate(payload)
+
+
+def test_validator_rejects_metric_below_zero():
+    payload = _load_fixture()
+    payload["metrics"]["ndcg_cut_10"] = -0.1
+    payload["run_id"] = compute_run_id(payload)
+    with pytest.raises(ValidationError, match=r"outside \[0, 1\]"):
+        validate(payload)
+
+
+def test_validator_accepts_metric_at_bounds():
+    """The bounds themselves are valid (a perfect or zero score)."""
+    payload = _load_fixture()
+    payload["metrics"]["ndcg_cut_10"] = 1.0
+    payload["metrics"]["recall_1000"] = 0.0
+    payload["run_id"] = compute_run_id(payload)
+    validate(payload)  # must not raise
+
+
 # ---------- Validator: hash-level rejections ---------------------------------