Add explicit configs block + fix manifest path ref in README so HF viewer auto-detects splits

README.md

@@ -28,6 +28,21 @@ task_categories:
 - question-answering
 pretty_name: SecureCodePairs
 version: 1.2.0
+configs:
+  - config_name: default
+    data_files:
+      - split: train
+        path: data/train.jsonl
+      - split: validation
+        path: data/validation.jsonl
+      - split: test
+        path: data/test.jsonl
+      - split: benchmark
+        path: data/benchmark.jsonl
+  - config_name: trajectories
+    data_files:
+      - split: train
+        path: trajectories/trajectories.jsonl
 ---
 
 ## Dataset Summary
@@ -239,7 +254,7 @@ python3 scripts/statistics.py
 
 All examples are hand-authored (no template-renamed duplicates). Source records live in `scripts/data.py` and
 `scripts/data_ext*.py`; trajectories in `scripts/trajectories.py`. The build uses a fixed seed (`42`) for deterministic
-train/validation/test splits. See `dataset/manifest.json`.
+train/validation/test splits. See `manifest.json`.
 
 ---