AI & ML
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  Generative AI
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  Change how you work with GitHub Copilot.
  LLMs
  Everything developers need to know about LLMs.
  Machine learning
  Machine learning tips, tricks, and best practices.
  How AI code generation works
  Explore the capabilities and benefits of AI code generation and how it can improve your developer experience.
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Developer skills
- Developer skills
  Resources for developers to grow in their skills and careers.
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  Insights and best practices for building apps.
  Career growth
  Tips & tricks to grow as a professional developer.
  GitHub
  Improve how you use GitHub at work.
  GitHub Education
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  Programming languages & frameworks
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  Learn how to start building, shipping, and maintaining software with GitHub.
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Engineering
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  Architecture & optimization
  Discover how we deliver a performant and highly available experience across the GitHub platform.
  Engineering principles
  Explore best practices for building software at scale with a majority remote team.
  Infrastructure
  Get a glimpse at the technology underlying the world’s leading AI-powered developer platform.
  Platform security
  Learn how we build security into everything we do across the developer lifecycle.
  User experience
  Find out what goes into making GitHub the home for all developers.
  How we use GitHub to be more productive, collaborative, and secure
  Our engineering and security teams do some incredible work. Let’s take a look at how we use GitHub to be more productive, build collaboratively, and shift security left.
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Enterprise software
- Enterprise software
  Explore how to write, build, and deploy enterprise software at scale.
  Automation
  Automating your way to faster and more secure ships.
  CI/CD
  Guides on continuous integration and delivery.
  Collaboration
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  DevOps
  DevOps resources for enterprise engineering teams.
  DevSecOps
  How to integrate security into the SDLC.
  Governance & compliance
  Ensuring your builds stay clean.
  Secure software development
  GitHub recognized as a Leader in the Gartner® Magic Quadrant™ for AI Code Assistants
  Learn why Gartner positioned GitHub as a Leader for the second year in a row.
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News & insights
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  Octoverse
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  Product
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  Research
  Data-driven insights around the developer ecosystem.
  The library
  Older news and updates from GitHub.
  Unlocking the power of unstructured data with RAG
  Learn how to use retrieval-augmented generation (RAG) to capture more insights.
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Open Source
- Open Source
  Everything open source on GitHub.
  Gaming
  Explore open source games on GitHub.
  Git
  The latest Git updates.
  Maintainers
  Spotlighting open source maintainers.
  Social impact
  How open source is driving positive change.
  An introduction to innersource
  Organizations worldwide are incorporating open source methodologies into the way they build and ship their own software.
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Security
- Security
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  Application security
  Application security, explained.
  Supply chain security
  Demystifying supply chain security.
  Vulnerability research
  Updates from the GitHub Security Lab.
  Web application security
  Helpful tips on securing web applications.
  The enterprise guide to AI-powered DevSecOps
  Learn about core challenges in DevSecOps, and how you can start addressing them with AI and automation.
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Kevin Merchant

Staff Manager, Applied Science, GitHub Code|AI. I lead an applied research team to fine-tune custom models for GitHub Copilot and develop agentic tools and evaluation pipelines.

Posts by this author

GitHub Copilot Evolving GitHub Copilot’s next edit suggestions through custom model training

GitHub Copilot’s next edit suggestions just got faster, smarter, and more precise thanks to new data pipelines, reinforcement learning, and continuous model updates built for in-editor workflows.

Kevin Merchant, Yu HuNovember 20, 2025

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Posts by this author

GitHub CopilotEvolving GitHub Copilot’s next edit suggestions through custom model training

We do newsletters, too

Posts by this author

GitHub CopilotEvolving GitHub Copilot’s next edit suggestions through custom model training

GitHub Copilot Evolving GitHub Copilot’s next edit suggestions through custom model training

GitHub Copilot Evolving GitHub Copilot’s next edit suggestions through custom model training