
SWE-Agent - Detailed Review
AI Agents

SWE-Agent - Product Overview
Introduction to SWE-Agent
SWE-Agent is an innovative AI-driven tool developed by researchers at Princeton University, aimed at revolutionizing the software engineering process. Here’s a brief overview of its primary function, target audience, and key features:Primary Function
SWE-Agent is designed to turn large language models (LMs), such as GPT-4 or Claude Sonnet 3.5, into autonomous software engineering agents. Its main function is to fix issues in real GitHub repositories, perform web-based tasks, identify cybersecurity vulnerabilities, and handle custom software engineering tasks.Target Audience
The primary target audience for SWE-Agent includes software developers, engineers, and researchers who need to automate and streamline their software development and debugging processes. This tool is particularly useful for those working on open-source projects or managing large codebases on GitHub.Key Features
Automation and Efficiency
SWE-Agent automates the process of resolving issues in GitHub repositories, significantly boosting efficiency. It achieves an impressive issue resolution rate of 12.29% to 12.47% on various benchmarks, such as the SWE-bench test set.Agent-Computer Interface (ACI)
The tool features a specially designed Agent-Computer Interface (ACI) that simplifies the interaction between the language model and the codebase. This interface allows the agent to browse repositories, view, edit, and execute code files efficiently.Customization and Open-Source Nature
SWE-Agent is open-source, which allows for experimentation, contribution, and customization by the software engineering community. Users can configure the agent’s behavior using a YAML file and extend its capabilities through the open-source framework.Technical Architecture
The architecture of SWE-Agent involves a central `run.py` script that initializes a Docker container and a shell session. It manages dependencies, executes model actions, and optimizes the interaction with the language model through a `HistoryProcessor` that compresses the history of prompts and actions.Performance and Benchmarks
SWE-Agent has been benchmarked on the SWE-bench, a benchmark for evaluating large language models on real-world software issues collected from GitHub. It outperforms other software engineer agents in terms of accuracy and speed, with an average solving time of 93 seconds on GitHub repositories. In summary, SWE-Agent is a powerful tool that leverages advanced language models to automate software engineering tasks, making it an invaluable resource for developers and researchers seeking to enhance their productivity and efficiency.
SWE-Agent - User Interface and Experience
User Interface Overview
The user interface of SWE-Agent is crafted to facilitate efficient and effective interaction between AI agents and codebases, ensuring a smooth and intuitive user experience.Simplified Command System
SWE-Agent uses a simplified command system and feedback format that optimizes the interaction between language models and code repositories. This system makes it easier for the AI to browse, view, edit, and execute code files.Custom File Viewer
The tool features a custom file viewer that displays code in manageable chunks, typically 100 lines at a time. This approach prevents information overload and allows the agent to scroll through the file and focus on specific sections. This interactive file viewer presents code in a structured and digestible format, helping the agent to inspect file contents effectively.Specialized File Editor
SWE-Agent includes a specialized file editor that is optimized for efficient and precise code modifications. Unlike traditional text editors, this editor allows for multi-line edits through single commands, streamlining the editing process and reducing potential errors. The editor is designed for making code changes quickly and accurately.Linting Tool
The built-in linting tool ensures that code edits meet syntactical correctness before being applied. This feature runs when an edit command is issued and prevents the command from going through if the code is not syntactically correct, thereby maintaining code quality.Context Management System
The ACI includes a context management system that carefully curates the information presented to the agent. It focuses on displaying the most relevant information, such as recent actions, changes made to the codebase, and error messages. This helps maintain a clear and concise context, keeping the agent focused on the task at hand.Ease of Use
SWE-Agent is designed with ease of use in mind. It integrates tools like Docker and Miniconda to streamline the setup and usage process, reducing the typical challenges associated with Python environment and package management. The conda environment setup and simplified command system make it user-friendly, especially for those working with large codebases.Overall User Experience
The overall user experience is enhanced by the structured and interactive interface. By limiting the amount of code displayed at any given time and providing navigation tools like scroll and search commands, SWE-Agent prevents information overload and ensures that the agent’s limited context window is used effectively. This makes the interaction with codebases more efficient and less prone to errors.Conclusion
In summary, SWE-Agent’s user interface is designed to be intuitive, efficient, and user-friendly, making it an effective tool for AI-driven software engineering tasks.
SWE-Agent - Key Features and Functionality
SWE-Agent Overview
The SWE-Agent, developed by Princeton University’s Natural Language Processing group, is an innovative AI-driven tool that transforms large language models (LLMs) into autonomous software engineering agents. Here are the main features and functionalities of the SWE-Agent:Automatic Issue Resolution
SWE-Agent takes a GitHub issue as input, whether it’s a bug report or a feature request, and attempts to fix it automatically. This process streamlines the debugging and development workflow, saving developers significant time and effort.Agent-Computer Interface (ACI)
The ACI is a crucial component of SWE-Agent, allowing the LLM to interact with the codebase effectively. The ACI includes a system message that sets the context for the agent’s behavior, defining it as an autonomous programmer working in a command-line interface. This interface enables the agent to execute commands, view and edit code files, and track the history of its actions to avoid repetition.Repository Interaction
SWE-Agent interacts with GitHub repositories by browsing files, editing code, and running the edited code to test its modifications. This interaction is facilitated by the ACI, which provides specific commands for these actions, such as searching files, editing lines, and converting input into executable code.Code Execution and Iterative Improvement
The agent can run code to test its modifications and ensure the issue is resolved. Through an iterative feedback loop, SWE-Agent refines its solutions until the issue is successfully addressed. This process typically takes around 10 “turns” to reach the point of attempting to submit a solution.Performance Metrics
SWE-Agent has demonstrated impressive performance, resolving 12.29% of issues on the SWE-bench evaluation set. This performance is significantly better than what raw LLMs can achieve, highlighting the effectiveness of the ACI in software engineering tasks.Flexible LM Integration
SWE-Agent is compatible with various LLMs, such as GPT-4, and can be configured to use different APIs or even local models. This flexibility allows users to choose the most suitable language model for their project needs.Rapid Execution
The agent completes its tasks quickly, typically within a minute, which significantly reduces the time spent on debugging and issue resolution. This speed is a result of the efficient ACI and the automated process of analyzing and fixing issues.Security and Ethical Considerations
While SWE-Agent automates many tasks, it also raises concerns about security and ethical issues, such as potential data loss or the generation of malicious code. The developers emphasize the importance of addressing these concerns to ensure the safe and responsible use of AI agents in software engineering.Practical Implementation
To get started with SWE-Agent, users need to set up their preferred language model, configure the agent to access their GitHub repository, and begin by feeding it simple issues before moving to more complex problems. The tool also supports a “one-click deploy” using GitHub Codespaces, making it easier to integrate into the development workflow.Conclusion
In summary, SWE-Agent leverages AI to automate software engineering tasks, enhancing productivity and efficiency by providing a seamless interface between LLMs and codebases. Its key features make it a valuable tool for developers, from automatic issue resolution to rapid execution and flexible integration with various language models.
SWE-Agent - Performance and Accuracy
The SWE-Agent Overview
The SWE-Agent, a significant advancement in AI-driven software engineering, demonstrates notable performance and accuracy in resolving real-world coding challenges, but it also has several limitations and areas for improvement.
Performance on SWE-Bench
On the SWE-Bench dataset, which is composed of real-world software issues sourced from GitHub, SWE-Agent shows a significant improvement over previous approaches. Initially, it achieved a 12.47% success rate in fully resolving issues, surpassing the previous best of 3.8% by non-interactive methods.
However, when the dataset was refined to address issues such as ‘solution leakage’ (where solutions were directly provided in the issue reports or comments) and weak test cases, the resolution rate dropped substantially. For instance, after filtering out these problematic issues, the resolution rate of SWE-Agent GPT-4 dropped from 12.47% to 3.97%, and further to 0.55% when using the enhanced SWE-Bench dataset.
Efficiency and Problem-Solving Approach
SWE-Agent’s performance is also marked by its efficiency in reaching solutions. It often initiates problem-solving by reproducing the issue and pinpointing its root cause, using tools like minimal reproduction scripts and error message analysis. The agent engages in an iterative process of editing code, executing tests, and analyzing results to refine its solution. This approach indicates the agent’s ability to effectively reason about the problem and converge on solutions quickly.
Limitations
Data Leakage and Weak Test Cases
A significant issue with the original SWE-Bench dataset is the presence of ‘solution leakage’ and weak test cases, which artificially inflate the agent’s performance metrics. The refined SWE-Bench dataset highlights these issues, showing a drastic drop in resolution rates when these problems are addressed.
Error Sensitivity
SWE-Agent’s progress can be hampered by the introduction of errors during code modification, particularly syntax errors. While the incorporation of a code linter helps mitigate this, there is still room for improvement in error recovery mechanisms.
Cost and Efficiency
The evaluation of SWE-Agent and similar AI agents must consider both accuracy and cost. The agent’s interactions can be costly, with each run capped at $4 USD, translating to hundreds of thousands of language model tokens. This emphasizes the need for cost-controlled evaluations to avoid encouraging the development of excessively costly agents.
Areas for Improvement
Enhancing Error Recovery Mechanisms
Future research should focus on improving the agent’s ability to recover from complex errors. This could involve techniques that enable the agent to detect, understand, and autonomously implement appropriate recovery strategies.
Adaptive and Context-Aware ACIs
Developing ACIs (Agent-Computer Interfaces) that dynamically adapt to the specific codebase, task, and learning progress of the agent could enhance performance. This includes refining feedback mechanisms and customizing error mitigation strategies.
Broadening Language Support and PR Scope
Expanding the dataset to include issues in languages other than Python and incorporating a wider range of pull requests can improve the agent’s versatility and ability to solve software engineering problems across different technologies.
By addressing these limitations and areas for improvement, the SWE-Agent can become even more effective in solving real-world software engineering challenges.

SWE-Agent - Pricing and Plans
The Pricing Structure for SWE-Agent
The pricing structure for SWE-Agent, an AI-driven software engineering tool, is largely influenced by the external services it relies on, rather than offering multiple tiers or plans of its own. Here are the key points to consider:
Open-Source Nature
SWE-Agent is an open-source project, which means it is free to use and modify. Developers can access and deploy it on their local machines or use cloud development environments like GitHub Codespaces without any direct cost from the SWE-Agent project itself.
External Service Costs
- GitHub Codespaces: Using GitHub Codespaces to run SWE-Agent incurs costs associated with this cloud development environment. However, the specific costs are not detailed in the context of SWE-Agent, as they vary based on GitHub’s pricing model.
- OpenAI API: SWE-Agent requires an OpenAI API key to use models like GPT-4. The cost of using these APIs is a significant factor. For example, the cost to run a single test is around $2 per GitHub issue, due to the API requests made to OpenAI.
Cost Limits
To manage expenses, SWE-Agent has a feature that allows setting cost limits for running tasks with GPT-4. If the cost exceeds this limit (e.g., $2 by default), the task is halted to prevent excessive expenditure.
No Tiered Plans
There are no tiered plans or different feature sets available for SWE-Agent. It is a single, open-source tool that can be used as-is, with costs incurred from the external services it integrates with.
Summary
In summary, while SWE-Agent itself is free and open-source, its usage involves costs associated with external services like GitHub Codespaces and OpenAI APIs. There are no multiple tiers or plans; instead, users manage costs through the tool’s built-in cost limit features.

SWE-Agent - Integration and Compatibility
SWE-Agent Overview
SWE-Agent, an open-source AI tool developed by researchers from Princeton University and Stanford University, integrates seamlessly with various tools and platforms, enhancing its versatility and utility in software engineering.Integration with Development Platforms
SWE-Agent is highly compatible with popular development platforms. It integrates smoothly with GitHub, allowing it to automate code reviews, manage pull requests, and track changes in real-time within GitHub repositories.Key Features:
- This integration enables the agent to fix issues, add new features, and refactor code directly within GitHub repositories.
- It also supports interactions with other development tools like Jira and Linear, enhancing ticketing workflows by adding relevant context such as related code snippets and issue histories.
Compatibility with Communication Tools
In addition to development platforms, SWE-Agent integrates with communication tools like Slack. This allows the agent to provide real-time updates, respond to questions, and perform codebase Q&A, facilitating collaboration within development teams.Framework Compatibility
SWE-Agent is framework-agnostic, meaning it supports a variety of frameworks such as LangChain, LlamaIndex, CrewAI, and Autogen. This flexibility enables seamless integration with established workflows and minimizes the need for extensive reconfiguration.Interaction with Codebases
The agent uses a custom Agent-Computer Interface (ACI) to interact with isolated computer environments. This interface allows the agent to browse repositories, view, edit, and execute code files efficiently. The ACI is configurable, making it easy to iterate on its design for repository-level coding tasks.Language Model Compatibility
SWE-Agent can work with various large language models (LLMs) such as GPT-4 and Claude 3.5 Sonnet. This compatibility allows developers to choose the language model that best suits their needs, and it has been shown to boost the agent’s success rate in resolving issues.Browser Interaction
The tool also includes features for browser interaction, enabling developers to manage complex interactions within software environments and user-interface-based applications. This feature provides an intuitive way to handle interactions that would otherwise be challenging.Conclusion
Overall, SWE-Agent’s integration capabilities and compatibility across different platforms and devices make it a versatile and powerful tool for software engineering, streamlining various aspects of the development process.
SWE-Agent - Customer Support and Resources
Resources and Support for SWE-Agent Users
Documentation and Tutorials
The SWE-Agent provides comprehensive documentation that includes step-by-step tutorials. These tutorials cover various aspects such as running the agent from the command line, solving GitHub issues, and performing other tasks. For example, the “Command Line Basics” tutorial guides users through the process of using SWE-Agent to solve individual issues, including examples of command line options and configurations.User Guides and Hello World Example
The official documentation includes a “Hello World” guide that helps new users get started with solving a GitHub issue using SWE-Agent. Additional user guides provide deeper insights into the features and goals of the project.Configuration and Setup
Detailed instructions are provided for setting up the environment, including the installation of Docker, Miniconda, and the creation of a `keys.cfg` file for API keys. These steps are crucial for smooth operation and are outlined in the setup section of the documentation.Command Line Options and Flags
Users can customize the behavior of SWE-Agent using various command line options and flags. Running `python run.py –help` displays all available options, which can be used to configure the agent according to specific needs.Error Handling
The SWE-Agent is designed to provide clear feedback in case of errors. If a command fails due to syntax errors or other issues, the agent will generate a message indicating the problem, helping users to identify and fix the issue promptly.Community Feedback and Support
While there is no dedicated customer support channel mentioned, the project benefits from community feedback and discussions. Users can engage with the community through platforms like GitHub and Reddit, where they can share experiences, ask questions, and get insights from other users.Performance Metrics and Benchmarks
The documentation also includes performance metrics and benchmarks, such as the agent’s issue resolution rate and average resolution time. This information helps users evaluate the effectiveness of SWE-Agent in their specific use cases. By leveraging these resources, users can effectively utilize the SWE-Agent and address any issues that may arise during its use.
SWE-Agent - Pros and Cons
Advantages of SWE-Agent
Efficiency and Speed
SWE-Agent is notable for its speed and efficiency in resolving software engineering issues. It can solve problems on GitHub repositories with an average time of just 93 seconds, outperforming other agents in this aspect.
Accuracy and Performance
The agent demonstrates a significant success rate in fully resolving real-world issues, achieving a 12.47% success rate on the SWE-Bench test set, which is a substantial improvement over non-interactive methods.
Code Generation and Editing
SWE-Agent is proficient in generating code snippets based on user input, making it valuable for rapid prototyping and development. It also features a specialized file editor that allows for multi-line edits through single commands, streamlining the editing process and reducing potential errors.
Error Detection and Mitigation
The agent includes robust error detection mechanisms that help identify and correct potential issues in the code before deployment. It provides immediate feedback on syntax errors, preventing them from cascading into larger problems.
Task Management
SWE-Agent can manage tasks effectively, allowing developers to focus on more complex problems while it handles routine operations. This includes reproducing issues, pinpointing their root cause, and executing tests to refine solutions.
Open-Source Nature
Being open-source, SWE-Agent allows for experimentation and contributions from the community, which can lead to continuous improvements and adaptations to various software engineering tasks.
Specialized Agent-Computer Interface (ACI)
The agent’s custom ACI is designed to support the unique strengths and limitations of Large Language Models (LLMs) like GPT-4. This interface provides clear, concise, and contextually relevant feedback, enhancing the agent’s performance and focus.
Disadvantages of SWE-Agent
Limited Context Window
While the ACI helps manage context, the agent’s performance can still be hampered by its limited context window. It is optimized to view only 100 lines of code at a time to streamline its thought process, but this can be a limitation in handling very large files or complex issues that require a broader context.
Error Recovery
Although SWE-Agent has proactive error mitigation strategies, there is still room for improvement in its ability to recover from more complex errors. Future research is needed to enhance its error recovery mechanisms.
Dependency on LLMs
The agent’s effectiveness is heavily dependent on the capabilities of the underlying LLMs, such as GPT-4. Any limitations or biases in these models can affect the agent’s performance.
Static ACI
Currently, the ACI is largely static and does not dynamically adapt to the specific codebase or task at hand. Future work is needed to develop more adaptive and context-aware ACIs.
Community Contributions
While being open-source is an advantage, SWE-Agent’s development is primarily driven by its core team, unlike some other agents that benefit from a more vibrant community of contributors.
In summary, SWE-Agent offers significant advantages in terms of efficiency, accuracy, and specialized capabilities, but it also has areas for improvement, particularly in error recovery and the adaptability of its ACI.

SWE-Agent - Comparison with Competitors
Unique Features of SWE-Agent
Open-Source Nature
SWE-Agent is an open-source tool, which allows developers to access, modify, and contribute to its codebase. This openness is a significant advantage over closed-source alternatives like Devin, as it fosters community involvement and customization.
Agent-Computer Interface (ACI)
SWE-Agent utilizes a custom ACI that enables efficient interaction between the agent and the code repository. This interface allows the agent to view, edit, and execute code files, and it includes features like a specialized file editor and real-time feedback mechanisms.
Integration with GitHub
SWE-Agent seamlessly integrates with GitHub, allowing it to take GitHub issues as input and generate pull requests as solutions. This integration makes it highly practical for real-world coding environments.
Efficiency and Speed
SWE-Agent resolves issues quickly, with an average solving time of 93 seconds, which is significantly faster than some competitors like Devin, which takes around 5 minutes.
Performance Benchmarks
SWE-Bench Performance
SWE-Agent achieves an impressive 12.47% issue resolution rate on the SWE-bench evaluation set, outperforming previous non-interactive methods and demonstrating its effectiveness in resolving real-world software issues.
Comparison with Devin
While Devin, a closed-source alternative, achieves a slightly higher accuracy rate of 13.86% on the SWE-bench benchmark, SWE-Agent’s performance is very close at 12.29%. However, SWE-Agent’s open-source nature and faster execution time make it a compelling alternative.
Potential Alternatives
Devin
As mentioned, Devin is a closed-source software engineering agent that has been a benchmark in the field. It has a slightly higher accuracy rate but lacks the openness and community involvement that SWE-Agent offers. Devin also takes longer to resolve issues compared to SWE-Agent.
Other AI Agents
While specific details about other AI agents in this category are limited, the unique open-source design and the custom ACI of SWE-Agent make it a standout. Other agents might offer different features or integrations, but SWE-Agent’s community-driven approach and efficiency set it apart.
Conclusion
SWE-Agent’s combination of open-source accessibility, efficient code navigation, and rapid issue resolution makes it a highly competitive tool in the AI-driven software engineering category. Its ability to integrate seamlessly with GitHub and its custom ACI enhance its usability and effectiveness, making it a valuable resource for software developers.

SWE-Agent - Frequently Asked Questions
Here are some frequently asked questions about SWE-agent, along with detailed responses to each:
What is SWE-agent and what does it do?
SWE-agent is a tool that turns language models (LMs), such as GPT-4, into software engineering agents. These agents can fix bugs and issues in real GitHub repositories. It achieves this by using an Agent-Computer Interface (ACI) that allows the LM to browse, view, edit, and execute code files.What models are supported by SWE-agent?
SWE-agent is likely compatible with most language models, including GPT-4 and others. There are also models available for testing purposes.How does SWE-agent resolve issues in GitHub repositories?
SWE-agent resolves issues by taking an input GitHub issue and returning a pull request that attempts to fix it. This process is divided into two steps: inference, where the agent generates a pull request, and evaluation, where the pull request is verified to ensure it fixes the issue.What is the Agent-Computer Interface (ACI) and why is it important?
The ACI is a crucial component of SWE-agent that enables the language model to interact with the repository. It involves simple LM-centric commands and feedback formats, making it easier for the LM to handle code files. Good ACI design is essential for achieving better results, as a baseline agent without a well-tuned ACI performs significantly worse.Can I change the demonstrations given to SWE-agent?
Yes, you can modify or change the demonstration trajectories provided to SWE-agent. These demonstrations show the agent how to solve an example issue, which improves its ability to solve novel issues. You can adjust these to better fit your specific use case.Does SWE-agent run on Windows, MacOS, and Linux?
Yes, SWE-agent can run on Windows, MacOS, and Linux. However, there might be limitations related to the availability of Docker containers for your environment. You can also execute SWE-agent in the cloud if needed.What are the known issues with SWE-agent?
There are known issues with some repositories not installing properly on `arm64` or `aarch64` architecture computers. For now, using an `x86` machine is recommended to run and evaluate on the entirety of SWE-bench. Additionally, there may be issues with Windows, but using Docker can help mitigate these.How do I run SWE-agent on a GitHub issue?
You can run SWE-agent on any GitHub issue using a script. For example:python run.py --model_name gpt4 --data_path https://github.com/pvlib/pvlib-python/issues/1603 --config_file config/default_from_url.yaml
This command runs SWE-agent on a specified GitHub issue.
What are the output files generated by SWE-agent?
SWE-agent generates several output files, but you are likely most interested in the `*.traj` files. These files contain complete records of SWE-agent’s thought process and actions.How do I handle long error messages related to configuration options?
If you encounter long error messages about configuration options not working, it is probably due to union types. The system tries every option until it finds one that works based on your inputs. If none work, it throws an error message explaining why the initialization failed.What is SWE-agent EnIGMA and what does it add?
SWE-agent EnIGMA is an extension that adds advanced offensive cybersecurity capabilities. It solves capture the flag (CTF) challenges, achieving state-of-the-art performance on the NYU CTF benchmark. EnIGMA introduces Interactive Agent Tools (IATs) and a Summarizer concept to handle long contexts and multitasking with tools like debuggers.
SWE-Agent - Conclusion and Recommendation
Final Assessment of SWE-Agent
SWE-Agent, developed by researchers at Princeton University, is a significant advancement in the AI-driven product category, particularly in software engineering. Here’s a comprehensive overview of its benefits, target users, and overall recommendation.Key Benefits
- Automatic Issue Resolution: SWE-Agent can automatically resolve issues in GitHub repositories, streamlining the debugging process. It achieves a notable 12.47% issue resolution rate on the SWE-bench evaluation set, setting a new benchmark.
- Efficiency: The agent completes its tasks in just one minute, significantly reducing debugging time.
- Flexibility: It is compatible with various large language models (LLMs) like GPT-4, allowing for customization based on project needs.
- Agent-Computer Interface (ACI): SWE-Agent uses a unique ACI that enhances the LLM’s ability to interact with repositories effectively, including viewing, editing, and executing code files.
How It Works
SWE-Agent transforms LLMs into software engineering assistants by analyzing GitHub issues, interacting with the repository, executing code to test modifications, and refining solutions through an iterative feedback loop.Who Would Benefit Most
- Software Developers: Developers can significantly benefit from SWE-Agent as it automates the debugging process, saving time and reducing the workload associated with issue resolution.
- Development Teams: Teams working on large-scale software projects can use SWE-Agent to streamline their workflow, improve efficiency, and focus on more complex tasks.
- Open-Source Contributors: Contributors to open-source projects on GitHub can leverage SWE-Agent to resolve issues more quickly, enhancing the overall quality and maintainability of the codebase.