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README.md
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---
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tags:
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- dialogue
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- task-oriented-dialogue
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- turn-embeddings
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- contextual-representations
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language:
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- en
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---
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# TRACE — Contextual Turn Encoders *(checkpoints privados)*
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> **TRACE** (nombre de trabajo) es un encoder contextual de turnos para diálogo orientado a tareas:
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> un Transformer estilo BERT cuyos *tokens son turnos*, entrenado auto-supervisado **sobre los
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> embeddings congelados** de una base (`f1 → e_t → f2 → h_t`), con actualización residual
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> `h_t = LayerNorm(e_t + Δ_t)`. Paper en preparación (Fernández, Burdisso, Errecalde).
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> Código: repo privado `doctorado-unsl`, paquete `contextual-turn-embeddings`.
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## Convención de nombres
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`contextual-turn-encoder-base-{arquitectura}-{atención}-{escala}`
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| Campo | Valores | Significado |
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|---|---|---|
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| arquitectura | `custom` / `lite` / `deep` | pre-LN propia (6L/8H) / BERT-fiel 6L-8H (full) ó 4L (1m) / BERT-base literal 12L/12H |
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| atención | `ar` / `bidi` | causal (online, la limpia para trayectoria) / bidireccional |
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| escala | `1m` / `full` | 13 datasets ~1M turnos (válida p/ transferencia SimJoint) / 19 datasets ~2M turnos |
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| sufijo `mpnet-` / `todbert-` | — | f2 entrenado sobre otra base congelada (ablación base-agnóstica) |
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Cada carpeta incluye el último checkpoint, **`best/`** (mejor val) y **`trainlog.jsonl`** (registro
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completo por época: corpus, receta, curvas).
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## Inventario
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| Checkpoint | Rol |
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|---|---|
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| `…-lite-ar-full/best` ⭐ | **headline**: act(t+1) held-out 0.792 acc / 0.706 F1 |
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| `…-deep-{ar,bidi}-full` | estudio de escala (BERT-base empata a lite a esta escala de datos) |
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| `…-lite-{ar,bidi}-{1m,full}` | familia principal |
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| `…-custom-{ar,bidi}-{1m,full}` | v1 histórica (pre-LN propia) |
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| `…-{mpnet,todbert}-lite-ar-1m` | ablación cross-base |
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## Cargar un checkpoint
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```python
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from huggingface_hub import snapshot_download
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from contextual_turn_embeddings import ContextualTurnModelV2
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d = snapshot_download("jumafernandez/trace-checkpoints",
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allow_patterns="contextual-turn-encoder-base-lite-ar-full/*")
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model = ContextualTurnModelV2.from_pretrained(
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f"{d}/contextual-turn-encoder-base-lite-ar-full/best")
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```
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## Resultados clave (registro en el repo de código)
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- **Anticipación act(t+1) held-out**: lite-AR 0.792/0.706 vs EMA 0.685/0.582, e_t 0.679/0.567 (+0.11 acc inductivo).
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- **Counterfactual**: following-acc 0.541 vs azar 0.167 (base y random-init en azar).
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- **Transferencia SimJoint (1m)**: f2 > e_t en 3 bases (+0.04–0.05 F1).
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*Repos privados hasta la publicación; al liberar, las cards se reescriben en inglés con el nombre final.*
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