Small language models are attractive in production because they are inexpensive, fast, and easy to specialize, but specialization remains a difficult loop. The hard decisions surround training: acquiring and curating supervision, diagnosing failures, selecting a training strategy, and preventing a targeted fix from breaking behavior that already works. We present Pioneer Agent, a closed-loop system that automates this lifecycle. In cold-start mode, the agent turns a task specification into a trained model by searching jointly over data composition, hyperparameters, and learning strategy. In production mode, it converts judged failures into a failure taxonomy and corrective curriculum, retrains, and retains an update only when it passes regression gates. We introduce AdaptFT-Bench, seven staged scenarios that combine fixable noise with harmful supervision at increasing poison rates. Across eight cold-start benchmarks, Pioneer Agent improves over the base checkpoint on every task. Across all seven AdaptFT-Bench scenarios, it improves or preserves the deployed checkpoint while indiscriminate retraining degrades, with final gaps up to 43 points. In two production-style case studies, the same loop raises intent-classification pass rate from 84.9% to 99.3% and entity F1 from 0.345 to 0.810. These results show that deployment failures can be converted into effective training curricula without manual intervention between iterations.

Information extraction (IE) is fundamental to numerous NLP applications, yet existing solutions often require specialized models for different tasks or rely on computationally expensive large language models. We present GLiNER2, a unified framework that enhances the original GLiNER architecture to support named entity recognition, text classification, and hierarchical structured data extraction within a single efficient model. Built on a fine-tuned encoder architecture, GLiNER2 maintains CPU efficiency and compact size while introducing multi-task composition through an intuitive schema-based interface. Our experiments demonstrate competitive performance across diverse IE tasks with substantial improvements in deployment accessibility compared to LLM-based alternatives. We release GLiNER2 as an open-source library available through pip, complete with pre-trained models and comprehensive documentation.