# Processed data (not committed)

| File | Produced by | Content |
|---|---|---|
| `maisons_avec_prix.json` | house filter + cleaning described in `docs/METHODOLOGIE.md` §2–4 (combined Realtor + DuProprio houses with price) | 19,123 house listings |
| `specs.jsonl` | `scripts/01_extract_specs_llm.py` (GPT-4o-mini, strict JSON schema, resumable cache keyed by uid) | structured specifications extracted from descriptions |
| `facade_specs.jsonl` | `scripts/02_facade_vision.py` (vision–language model on the façade photo) | objective visual attributes (curb appeal, cladding, …) |
| `maisons_specs.json` / `.csv` | `scripts/03_merge_llm_features.py` | listings merged with LLM features |
| `maisons_hedonic.csv`, `maisons_hedonic_v4.csv` | `scripts/04_…`, `scripts/05_…` | final datasets with fitted price and `resid_pct` |
| `nn_robust_oos.npy`, `v5_blend_oos.npy` | `scripts/08_…`, `scripts/09_…` | out-of-sample predictions (5-fold, seed 42) reused by steps 10–14 |