ResearchResearch paperRobotics & Embodied AI · Large Language Models · Training & Scaling1 source · Oct 10, 2026

Terrarium: Growing Personal Assistants via Scalable Synthesis of App Worlds

To address this challenge, we introduce Terrarium, a framework that synthesizes executable App Worlds from real-world application information, generates training task packages with evaluator-side rubrics from these worlds, and iteratively validates and refines both through agent rollouts.

Key points

  • Advances in large language models (LLMs) have brought the vision of a general-purpose personal assistant closer to reality.
  • For App World synthesis, Terrarium organizes public Web information and in-application observations into structured app specifications that guide the construction of self-contained runtimes with callable operations and mutable, resettable state.
  • We construct a training suite of 275 App Worlds and 13,344 tasks for outcome-based reinforcement learning across three Qwen3 model scales (4B, 8B, and 14B parameters).
  • These results suggest that app-grounded world and task synthesis offers a scalable path toward general-purpose assistants capable of operating across broad application ecosystems.

Sources (1)

  • [1]Terrarium: Growing Personal Assistants via Scalable Synthesis of App Worlds
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 10, 12:30 PM
    To address this challenge, we introduce Terrarium, a framework that synthesizes executable App Worlds from real-world application information, generates training task packages with evaluator-side rubrics from these worlds, and iteratively validates and refines both through agent rollouts.
    Advances in large language models (LLMs) have brought the vision of a general-purpose personal assistant closer to reality.

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 10, 2026SAGE: Pushing 2-Bit Vector-Quantized LLMs toward Real-World Usability
  2. Oct 10, 2026Vela: User Behavior as Supervision Sparks LLM Intelligence
  3. Oct 10, 2026UltraBERT: Beyond the Limit of BERT Pre-Training
  4. Oct 9, 2026SAT-RL: Training Language Models for Logical Reasoning with Symbolic Solvers
  5. Oct 9, 2026ASSET: Adaptive Speech Segmentation via Reinforcement Learning
  6. Oct 9, 2026The Thinking Leakage in Reinforcement Learning for LLMs

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