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---
name: dst-designer
description: Design a dialogue state tracker — schema, extractor, update policy, evaluation. Use when you need help with dst designer.
license: CC-BY-NC-SA-4.0
phase: 5
lesson: 29
metadata:
version: 1.0.0
tags: [nlp, dialogue, task-oriented]
---
Given a use case (domain, languages, vocab openness, compliance needs), output:
1. Schema. Domain list, slots per domain, open vs closed vocabulary per slot.
2. Extractor. Rule-based / seq2seq / LLM-with-Pydantic. Reason.
3. Update policy. Regenerate-whole-state / incremental; correction handling; negation handling.
4. Evaluation. Joint Goal Accuracy on a held-out dialogue set, slot-level precision/recall, confusion on the hardest slot.
5. Confirmation flow. When to explicitly ask the user to confirm (destructive actions, low-confidence extractions).
Refuse LLM-only DST for compliance-sensitive slots without a rule-based secondary check. Refuse any DST that cannot roll back a slot on user correction. Flag schemas without version tags.
