Add Space card

README.md

@@ -1,10 +1,38 @@
 ---
-title: SFT V4 Dataset Viewer
-emoji: 🐢
-colorFrom: blue
-colorTo: yellow
+title: SFT v4 Dataset Viewer
+emoji: 🧭
+colorFrom: indigo
+colorTo: purple
 sdk: static
+app_file: index.html
 pinned: false
+license: mit
+short_description: Midtrain v4 SFT traces with repaired MR reasoning
 ---
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# SFT v4 Dataset Viewer
+
+Thirty meta-reasoning trajectories from the midtrain **v4** corpus, sampled
+across the full range of depth (2–11 layers) and judge score.
+
+Each trajectory shows, layer by layer:
+
+- the **MR reasoning** — the assistant target SFT trains on, with the
+  directions it commits to;
+- the **executions** that pursued those directions, and their reports;
+- the **summaries retained into the frontier**, which is what the next layer
+  plans over;
+- the **termination decision** and **final answer**, with the judge's verdict.
+
+## About the MR reasoning shown here
+
+Deliberation originally visited directions in F2 *rank* order. Rank encodes the
+accept/reject decision, so the narrative came out sorted by disposition: every
+kept direction before every discarded one in 96% of layers, against 40% in the
+order the planner actually proposed them. Training on that teaches position
+rather than judgement.
+
+The generator now follows F1's proposal order, and the affected records were
+regenerated. **This viewer shows only the repaired version** — trajectories
+whose MR had not been regenerated are excluded rather than displayed with the
+original ordering.