Add dataset card

README.md

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+---
+license: cc-by-4.0
+language:
+  - en
+size_categories:
+  - n>1T
+task_categories:
+  - text-generation
+pretty_name: SWE-rebench ConTree Traces
+tags:
+  - code
+  - execution-traces
+  - swe-rebench
+  - marin
+---
+
+# SWE-rebench ConTree Traces
+
+Line-by-line Python execution traces for the test suites of
+[`nebius/SWE-rebench-V2`](https://huggingface.co/datasets/nebius/SWE-rebench-V2),
+captured by running each instance's tests under a tracer inside Nebius ConTree
+sandboxes.
+
+For each instance the pipeline traces the PR-affected tests before and after
+the fix patch, plus the repository's full test suite (broad phase). Each row is
+one ``(instance_id, test_id)`` trace.
+
+## Schema
+
+| column | type | notes |
+| --- | --- | --- |
+| `instance_id` | string | SWE-rebench-V2 row id |
+| `test_id` | string | pytest node id |
+| `affected` | bool | True = test touched by the PR patch; False = broad-phase test |
+| `text` | string | plain-text annotated source + execution trace |
+
+`affected=True` rows render as ``<test source>`` / ``# --- pre-patch trace ---``
+/ ``# --- patch ---`` / ``# --- post-patch trace ---``; `affected=False` rows
+render as ``<test source>`` / ``# --- trace ---``.
+
+Sentinel rows from instances that failed before any trace was captured are
+excluded.
+
+## Provenance
+
+- **Source**: [`nebius/SWE-rebench-V2`](https://huggingface.co/datasets/nebius/SWE-rebench-V2)
+- **Generator**: `experiments/swe_rebench_trace/contree_pipeline.py` in
+  [marin-community/marin](https://github.com/marin-community/marin).