| # Dataset splits — hash-pinned 2026-06-06 | |
| Built by `scripts/build_canonical.py` from `data/sir_raw.parquet`. | |
| - Seed: `20260606` | |
| - Stratified by: `naics_subsector` (first 4 digits of Primary NAICS) | |
| - Train ratio: 70% | Dev ratio: 15% | Test: remainder | |
| ## Counts | |
| - total: 103,750 | |
| - train: 72,467 | |
| - dev: 15,410 | |
| - test: 15,873 | |
| ## Test split top subsectors | |
| 2381=686, 2382=549, 2362=383, 2131=380, 6221=362, 4451=332, 4931=329, 3116=323 | |
| ## Test split SHA-256 | |
| `c9490ed3177e63c6128f9e75e91d836b02ce09e464ea8e40f2717f1a15a0148a` | |
| The test split MUST NOT be re-shuffled or re-split. If `SPLITS.md` is | |
| ever regenerated, verify the SHA-256 above is unchanged. | |