First Make It Playable, Then Make It Good: Staged Interaction Learning for Small Dialogue-Game Agents

Syed Mahbubul Huq, Pranava Madhyastha


Abstract
We present Qwen-GuidePlay-2B, a 2B-parameter language model for dialogue-game interaction. We fine-tune Qwen3.5-2B using three steps: a) SFT on only successful game trajectories from Playpen, b) weighted turn-level SFT, and c) teacher-guided SFT. The teacher model (which is a larger model) is only used to fix formatting and evaluate examples, but does not create new gold actions. Our final model scores 57.12 clemscore and 42.68 statscore on the public Playpen validation. In the officially released challenge results, our model obtains the second-highest Playpen clemscore delta among submitted systems (which is ≈+36 over its base model). Our findings suggest that imitating full trajectories helps with playability, while turn-level and teacher-guided training usually improve decision-making and increase the overall score. Alternative procedurally heavy approaches like replay-repair and hard-example mining did not help, which suggests that small models are performant simply by using careful curation strategies rather than aggressive changes. We make available both the model and the code for reproducibility.
Anthology ID:
2026.lmplayschool-1.12
Volume:
The Proceedings of Improving Language Models through Learning from Dialogue Game Interaction
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Alessandro Suglia, Mario Giulianelli, David Schlangen, Raffaella Bernardi, Raquel Fernández, Sherzod Hakimov, Sabrina McCallum, Davide Mazzaccara, Dieu-Thu Le, Oliver Lemon, Alexander Koller
Venues:
LM Playschool | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
140–147
Language:
URL:
https://aclanthology.org/2026.lmplayschool-1.12/
DOI:
Bibkey:
Cite (ACL):
Syed Mahbubul Huq and Pranava Madhyastha. 2026. First Make It Playable, Then Make It Good: Staged Interaction Learning for Small Dialogue-Game Agents. In The Proceedings of Improving Language Models through Learning from Dialogue Game Interaction, pages 140–147, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
First Make It Playable, Then Make It Good: Staged Interaction Learning for Small Dialogue-Game Agents (Huq & Madhyastha, LM Playschool 2026)
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PDF:
https://aclanthology.org/2026.lmplayschool-1.12.pdf