# SFT-Eval Split Reconstruction

## Relevant Assets

- QA rows for `eval split` and `sft split` in splits/
- Split manifests and split counts in splits/

## How to Tnteprete the QA Rows

Each row exposes three reconstruction-oriented fields:

- `visual_ref`
- `source_episode_ref`
- `reconstruction_key_json`

These are designed to be stable, path-free references. They are sufficient to map a released item back to the corresponding source episode or recording once you have obtained the upstream dataset under its original terms.

## Source-specific Units

- `GM-100`: grouped by `(task_id, episode_id)`.
- `RH20T`: grouped by `recording_id`.
- `REASSEMBLE`: grouped by `recording_id`.
- `AIST-Bimanual`: grouped by `recording_id`.

## Expected Workflow

1. Obtain upstream datasets under their original terms.
2. Use `source`, `source_task_id`, `source_unit_id`, `camera`, and `frame_indices_json` from the public release.
3. Reconstruct the required visual inputs with the source-specific evaluation scripts in the main codebase.

## Optional: QA Rows Field Schema

- `item_id`: Stable public item identifier.
- `split`: `eval` or `sft`.
- `source`: `GM-100`, `RH20T`, `REASSEMBLE`, or `AIST-Bimanual`.
- `source_slug`: Short source slug used in release-relative references.
- `source_task_id`: Source-side task identifier without local paths.
- `source_unit_type`: Split-isolation unit type, e.g. `episode` or `recording`.
- `source_unit_id`: Public unit identifier without local paths.
- `task_id`: Canonical paper task ID `T1` ... `T12`.
- `task_name`: Canonical paper task name.
- `task_type_legacy`: Legacy engineering task name when it differs from paper naming.
- `input_type`: Public input format description.
- `question`: Public question text.
- `choice_A` ... `choice_F`: Flattened answer choices.
- `answer`: Public answer label in the release schema.
- `answer_text`: Public answer text mapped from `answer`.
- `num_choices`: Number of non-null answer choices.
- `num_frames`: Number of referenced frames.
- `frame_indices_json`: JSON-encoded frame indices.
- `display_labels_json`: JSON-encoded panel labels such as `["X", "Y"]` or `["X", "Z", "Y"]`.
- `camera`: Source camera identifier when available.
- `arm_type`: Source-side arm configuration tag when available.
- `visual_ref`: Release-relative visual reference string. This is not a local filesystem path.
- `source_episode_ref`: Release-relative source unit reference.
- `reconstruction_key_json`: Minimal JSON payload needed to reconstruct the sample with upstream data and source-specific scripts.
- `task_meta_in_source`: Whether source-side task metadata/context exists upstream.
- `task_meta_public`: Always `false` in this release build. Separate structured task-meta fields are intentionally withheld.
- `split_version`: Current split version.
- `split_group_id`: Source-side split group identifier.
- `builder_version`: Public builder version tag.
- `prompt_version`: Public prompt-serialization version tag.
- `sft_target`: SFT-only supervised target string. Present only in `processdata_sft.*`.

### Notes

- `T5` is equivalent to `T_progress`.
- `T8` is equivalent to `T_temporal`.
- `T9` is equivalent to `T_binary`.
- `T8` is normalized into six explicit permutation choices so the public table remains flat and Parquet-friendly.
- `T9` is normalized to `A/B` choices even when the source data originally used `X/Y`.