Document the cleaning pass.

README.md

@@ -1,41 +1,65 @@
 ---
-dataset_info:
-  features:
-  - name: prompt
-    dtype: string
-  - name: completion
-    dtype: string
-  - name: turn_id
-    dtype: string
-  - name: traj_id
-    dtype: string
-  - name: source
-    dtype: string
-  - name: language
-    dtype: string
-  - name: phase
-    dtype: string
-  - name: stratum
-    dtype: string
-  - name: n_prefix_chars
-    dtype: int64
-  - name: n_prefix_tokens
-    dtype: int64
-  - name: teacher_lift
-    dtype: float64
-  - name: modal_share
-    dtype: float64
-  - name: n_pool_refs
-    dtype: int64
-  splits:
-  - name: train
-    num_bytes: 520544302
-    num_examples: 17655
-  download_size: 143902230
-  dataset_size: 520544302
-configs:
-- config_name: default
-  data_files:
-  - split: train
-    path: data/train-*
+license: other
+task_categories: [text-generation]
+tags: [bittensor, sn120, affine, sft]
+size_categories: [10K<n<100K]
 ---
+
+# verdigris-d2d8b9d2
+
+Cleaned SFT corpus for Bittensor **SN120 (Affine)**, Reason v4
+(`weight_version_key=7`). 17,655 rows, TRL prompt-completion format.
+
+Format is exactly `</think>
+THOUGHT: {z}
+
+{y}` on every row.
+
+## How it was cleaned
+
+Derived from [`iamPi/tessera-77d11909`](https://huggingface.co/datasets/iamPi/tessera-77d11909).
+Prompts and actions are byte-identical to the source; only the thought
+channel changed, and 483 rows (2.66%) were removed.
+
+### Repaired in place (40.08% of rows had at least one defect)
+
+| defect | rows |
+|---|---|
+| stray `<think>` / `</think>` / `<thinking>` / `</thinking>` in the thought | 7,124 |
+| corrupted THOUGHT label (`THO`, `THOTH:`, `THOFTWARE:`, `THOTHought:`, `THOURLY Thought:`, `THOproperly` …) | 218 |
+| duplicated leading `THOUGHT:` / `THOUGHT` | 188 |
+| a second THOUGHT label mid-thought | 72 |
+| in-thought ` ```bash ` fence retagged to ` ```sh ` | 114 |
+
+The retag matters: the validator's `BASH_RE` matches only ` ```bash `, and
+`split_rollout` takes the **last** match as the action. A thought that quotes
+a bash fence could therefore be mistaken for the command whenever a model's
+real fence came out malformed.
+
+### Removed (483 rows)
+
+| reason | rows |
+|---|---|
+| thought shorter than the 80-char crown floor | 444 |
+| completion longer than the 1,792-token rollout budget | 34 |
+| harness output (`<returncode>` / `<output>`) leaked into the thought | 5 |
+
+Those last five were collapsed multi-turn transcripts: the "thought"
+contained the result of a command that had not been run yet, which would
+train the model to hallucinate observations.
+
+Two-channel thoughts — latent analysis followed by a visible summary — were
+**kept**. That is the contract's own shape: `split_rollout` joins the latent
+and visible halves on purpose, and 57 of the 61 such rows carry genuinely
+distinct text in each half.
+
+## Guarantees
+
+Every row was checked after rewriting: it round-trips through the validator's
+own `split_rollout`, is byte-identical to the `force_text()` rendering, has no
+think tag / THOUGHT label / bash fence / harness tag in its thought, clears
+the 80-char floor, and fits the rollout budget.
+
+## Variants
+
+A cue-appended build with an identical row set exists for A/B testing.