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1. formulahendry commented on Jun 18, 2026

   

   formulahendry

   on Jun 18, 2026

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   @sisrnb , are you asking Copilot ACP to suppot BYOK?
   In latest version, it should be supported. You could be able to config acp.json of JetBrains IDE like below:

   {
       "agent_servers": {
           "GitHub Copilot npx": {
               "command": "npx",
               "args": [
                   "@github/copilot-language-server@latest",
                   "--acp"
               ],
               "env": {
                   "COPILOT_PROVIDER_BASE_URL": "https://openrouter.ai/api/v1",
                   "COPILOT_PROVIDER_API_KEY": "sk-or-v1-xxxxxx",
                   "COPILOT_MODEL": "cohere/north-mini-code:free"
               }
           }
       }
   }
2. sisrnb commented on Jun 21, 2026

   

   sisrnb

   on Jun 21, 2026

   Author

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   @formulahendry Hi,

   I am using copilot-language-server to provide AI code completion for neovim.
   Line 108 of https://github.com/neovim/nvim-lspconfig/blob/master/lsp/copilot.lua specifies the startup command and arguments for copilot-language-server, which do not include the --acp parameter.
   copilot-language-server needs to run in LSP mode; otherwise, code completion does not work. I tried adding the --acp parameter, but code completion failed to function properly.

   I have confirmed that GitHub Copilot CLI supports BYOK (Bring Your Own Key). That is, after setting the following environment variables and then running the copilot command, copilot can directly converse without prompting for login:

   COPILOT_PROVIDER_TYPE
   COPILOT_PROVIDER_BASE_URL
   COPILOT_PROVIDER_API_KEY
   COPILOT_MODEL
   

   I downloaded the latest version 1.509.0 of copilot-language-server and replaced the older one, but it still does not respond to the above environment variables (when running without the --acp parameter).

   My operating system is Ubuntu 24.04.3 LTS.
3. formulahendry commented on Jun 24, 2026

   

   formulahendry

   on Jun 24, 2026

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   For now, only with --acp parameter, the copilot-language-server will respect those COPILOT_PROVIDER_BASE_URL env.
   You may try with a neovim ACP Client: https://agentclientprotocol.com/get-started/clients#editors-and-ides

   ❤️React with ❤️1Reacted by sisynb
4. bstoltefuss commented on Jul 2, 2026

   

   bstoltefuss

   on Jul 2, 2026

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   As far as i know BYOK/Offline mode has been implemented for Copilot in VSCode, Copilot CLI and has been announced to be implemented for VS Professional. Seems to be part of a new strategy at MS. So it should probably be enabled for LSP mode too. Otherwise integrations depending on LSP (f.e. the official copilot plugin for eclipse?) might not be able to implement this BYOK/Offline mode.
5. sisrnb commented on Jul 7, 2026

   

   sisrnb

   on Jul 7, 2026

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   Thank you all for your replies.

   One more question: In the future, without the --acp parameter, will the copilot-language-server respect those COPILOT_PROVIDER_BASE_URL env vars?