---
license: mit
base_model: Qwen/Qwen2.5-Coder-7B-Instruct
library_name: peft
datasets:
- TIGER-Lab/StopLoss-Training-Data
language:
- en
tags:
- lora
- agents
- coding-agents
- early-stopping
---

# StopLoss-Qwen2.5-Coder-7B-Instruct

A LoRA adapter for [Qwen/Qwen2.5-Coder-7B-Instruct](https://huggingface.co/Qwen/Qwen2.5-Coder-7B-Instruct) that predicts whether a coding agent's run will fail.
It is the Qwen2.5-Coder-7B-Instruct StopLoss monitor from [StopLoss: Teaching Agents to Predict Failure and Stop Early](https://arxiv.org/abs/2610.25525).

[🌐 Homepage](https://tiger-ai-lab.github.io/StopLoss/) | [📄 Paper](https://arxiv.org/abs/2610.25525) | [💻 Code](https://github.com/TIGER-AI-Lab/StopLoss) | [🤗 Training data](https://huggingface.co/datasets/TIGER-Lab/StopLoss-Training-Data)

## What it does

At tool steps 5, 8, 11, ..., the monitor reads the step count and the three most recent action–observation pairs of
a run. Its failure score is the probability of `ABORT` among the labels `CONTINUE`, `DELIVER` and `ABORT`, read from
the next-token logits in one forward pass. A run is stopped once the score reaches a threshold calibrated on
successful runs.

## Usage

```bash
git clone https://github.com/TIGER-AI-Lab/StopLoss.git && cd StopLoss
pip install -e ".[model]"
python scripts/build_windows.py --runs my_runs.jsonl --out windows.jsonl --ks checkpoints
python scripts/score_windows.py --base Qwen/Qwen2.5-Coder-7B-Instruct \
    --adapter TIGER-Lab/StopLoss-Qwen2.5-Coder-7B-Instruct \
    --windows windows.jsonl --out scores.jsonl
```

This adapter is seed 0 of its backbone; the results in the paper use an ensemble of four seeds.