[
    {
        "role": "user",
        "content": "trying%20to%20install%20github%20extensions%20using%20command%3A%20gh%20extension%20install%20%27github%2Fgh-copilot%27%20and%20getting%20error%20copilot%20matches%20the%20name%20of%20a%20built-in"
    },
    {
        "role": "assistant",
        "content": "You're running into this error because the `gh copilot` command conflicts with a **built-in command or functionality**\u2014because the `gh-copilot` extension has been **deprecated**. Attempting to install or force-install the old extension is now being blocked or replaced. Here\u2019s what\u2019s going on and how to resolve it.\n\n---\n\n## What\u2019s Changed\n\n- The `gh-copilot` extension is **deprecated**. It officially stopped working as of **October 25, 2025**, when GitHub introduced the new standalone **GitHub Copilot CLI**. ([github.blog](https://github.blog/changelog/2025-09-25-upcoming-deprecation-of-gh-copilot-cli-extension/?utm_source=openai))  \n- The new Copilot CLI is the intended replacement; it provides more powerful functionalities. ([github.blog](https://github.blog/changelog/2025-09-25-upcoming-deprecation-of-gh-copilot-cli-extension/?utm_source=openai))  \n\n---\n\n## Why You See the Error\n\nBecause `gh-copilot` is deprecated:\n\n- Attempting `gh extension install github/gh-copilot` may conflict with built-in GitHub CLI features or reserved commands.  \n- GitHub CLI detects that `copilot` is a name of a now built-in or managed feature, so it\u2019s rejecting the installation or raising a conflict.  \n- Even using `--force` won\u2019t always solve it, because it\u2019s no longer officially supported or functional. ([github.com](https://github.com/github/gh-copilot?utm_source=openai))  \n\n---\n\n## What To Do Instead\n\nHere are your options:\n\n### Use the New Copilot CLI\n\nGitHub now recommends switching to the new, agentic Copilot CLI. It\u2019s separate from `gh` and designed to provide a richer experience. ([github.blog](https://github.blog/changelog/2025-09-25-upcoming-deprecation-of-gh-copilot-cli-extension/?utm_source=openai))\n\n- Install using your package manager. For example:\n  - `npm install -g @github/copilot`\n  - Or another platform-specific installer (homebrew, winget, etc.). ([blog.melashri.net](https://blog.melashri.net/micro/gh-copilot-dead/?utm_source=openai))\n\n### If You Need Old `gh-copilot` Extension\n\nIf for any reason you still try to install the old extension (for compatibility or experimenting), note:\n\n- It won\u2019t be updated.\n- It doesn\u2019t work past Oct 25, 2025. ([github.blog](https://github.blog/changelog/2025-09-25-upcoming-deprecation-of-gh-copilot-cli-extension/?utm_source=openai))  \n- GitHub strongly suggests instead migrating to the new Copilot CLI. ([github.blog](https://github.blog/changelog/2025-09-25-upcoming-deprecation-of-gh-copilot-cli-extension/?utm_source=openai))  \n\n---\n\n## Migration Steps\n\n1. Uninstall old extension if it\u2019s partially installed:\n   ```\n   gh extension remove github/gh-copilot\n   ```\n\n2. Install the new Copilot CLI:\n   ```\n   npm install -g @github/copilot\n   ```\n   or equivalent installer for your OS. ([blog.melashri.net](https://blog.melashri.net/micro/gh-copilot-dead/?utm_source=openai))\n\n3. Authenticate with GitHub:\n   ```\n   copilot login\n   ```\n   (or follow the new CLI\u2019s auth instructions) ([inventivehq.com](https://inventivehq.com/knowledge-base/copilot/how-to-migrate-from-gh-copilot?utm_source=openai))\n\n4. Update any scripts or workflows that used `gh copilot suggest` or `gh copilot explain` to the new CLI syntax.  \n   - The old `gh copilot` commands are no longer guaranteed to work.  \n   - There may be aliasing options, but legacy paths are risky. ([github.com](https://github.com/orgs/community/discussions/86354?utm_source=openai))  \n\n---\n\nIf you tell me *which OS you use* (Windows / macOS / Linux) and *why you\u2019re trying to force-install the old extension*, I can walk you through the exact migration steps or help with compatibility options."
    }
]