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Agentless

Agentless🐱: an agentless approach to automatically solve software development problems

From OpenAutoCoder·Updated May 27, 2026·View on GitHub·

😽News | 🐈Setup | 🧶Comparison | 🐈‍⬛Artifacts | 📝Citation | 😻Acknowledgement The project is written primarily in Python, distributed under the MIT License license, first published in 2024. It has gained significant community traction with 2,060 stars and 231 forks on GitHub. Key topics include: agent, artificial-intelligence, llm, software-development.

Latest release: v1.5.0Agentless v1.5.0
October 29, 2024View Changelog →

😺 Agentless

<p align="center"> <a href="https://arxiv.org/abs/2407.01489"><img src="https://img.shields.io/badge/📃-Arxiv-b31b1b?style=for-the-badge"></a> <a href="https://github.com/OpenAutoCoder/Agentless/blob/master/LICENSE"><img src="https://forthebadge.com/images/badges/license-mit.svg" style="height: 28px"></a> </p> <p align="center"> <big><a href="#-news">😽News</a></big> | <big><a href="#-setup">🐈Setup</a></big> | <big><a href="#-comparison">🧶Comparison</a></big> | <big><a href="#-artifacts">🐈‍⬛Artifacts</a></big> | <big><a href="#-citation">📝Citation</a></big> | <big><a href="#-acknowledgement">😻Acknowledgement</a></big> </p>

😽 News

  • Dec 2nd, 2024: We integrated Agentless with Claude 3.5 Sonnet to achieve 40.7% and 50.8% solve rate on SWE-bench lite and verified
  • Oct 28th, 2024: We just released OpenAutoCoder-Agentless 1.5!
  • July 1st, 2024: We just released OpenAutoCoder-Agentless 1.0! Agentless currently is the best open-source approach on SWE-bench lite with 82 fixes (27.3%) and costing on average $0.34 per issue.

😺 About

Agentless is an agentless approach to automatically solve software development problems. To solve each issue, Agentless follows a simple three phase process: localization, repair, and patch validation.

  • 🙀 Localization: Agentless employs a hierarchical process to first localize the fault to specific files, then to relevant classes or functions, and finally to fine-grained edit locations
  • 😼 Repair: Agentless takes the edit locations and samples multiple candidate patches per bug in a simple diff format
  • 😸 Patch Validation: Agentless selects the regression tests to run and generates additional reproduction test to reproduce the original error. Using the test results, Agentless re-ranks all remaining patches to selects one to submit

🐈 Setup

First create the environment

shell
git clone https://github.com/OpenAutoCoder/Agentless.git cd Agentless conda create -n agentless python=3.11 conda activate agentless pip install -r requirements.txt export PYTHONPATH=$PYTHONPATH:$(pwd)
<details><summary>⏬ Developer Setup</summary> <div>
shell
# for contribution, please install the pre-commit hook. pre-commit install # this allows a more standardized code style
</div> </details>

Then export your OpenAI API key

shell
export OPENAI_API_KEY={key_here}

Now you are ready to run Agentless on the problems in SWE-bench!

[!NOTE]

To reproduce the full SWE-bench lite experiments and follow our exact setup as described in the paper. Please see this README

🧶 Comparison

Below shows the comparison graph between Agentless and the best open-source agent-based approaches on SWE-bench lite

<p align="center"> <img src="./resources/comparison_graph.png" style="width:75%; margin-left: auto; margin-right: auto;"> </p>

🐈‍⬛ Artifacts

You can download the complete artifacts of Agentless in our v1.5.0 release:

  • 🐈‍⬛ agentless_swebench_lite: complete Agentless run on SWE-bench Lite
  • 🐈‍⬛ agentless_swebench_verified: complete Agentless run on SWE-bench Verified
  • 🐈‍⬛ swebench_repo_structure: preprocessed structure information for each SWE-Bench problem

You can also checkout classification/ folder to obtain our manual classifications of SWE-bench-lite as well as our filtered SWE-bench-lite-S problems.

📝 Citation

bibtex
@article{agentless, author = {Xia, Chunqiu Steven and Deng, Yinlin and Dunn, Soren and Zhang, Lingming}, title = {Agentless: Demystifying LLM-based Software Engineering Agents}, year = {2024}, journal = {arXiv preprint}, }

[!NOTE]

The first two authors contributed equally to this work, with author order determined via Nigiri

😻 Acknowledgement

Contributors

Showing top 4 contributors by commit count.

View all contributors on GitHub →

This article is auto-generated from OpenAutoCoder/Agentless via the GitHub API.Last fetched: 5/30/2026