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Sign in to Copilot, or use the :LspCopilotSignIn command from https://github.com/neovim/nvim-lspconfig.

Option 1: Mason-lspconfig

{
  "williamboman/mason-lspconfig.nvim", --No manual LSP configuration needed
  opts = {
    ensure_installed = { "copilot" },
  },
  dependencies = { "williamboman/mason.nvim" },
},
{
  "saghen/blink.cmp",
  dependencies = { "fang2hou/blink-copilot" },
  opts = {
    sources = {
      default = { "lsp", "path", "snippets", "buffer", "copilot" },
      providers = {
        copilot = {
          name = "copilot",
          module = "blink-copilot",
          async = true,
        },
      },
    },
  },
},

Option 2: Mason + Custom lspconfig

{
  "neovim/nvim-lspconfig",
  opts = {
    servers = {
      copilot = {}, -- manual LSP configuration
    },
  },
},
{
  "mason-org/mason.nvim",
  opts = { ensure_installed = { "copilot" } },
},
{
  "saghen/blink.cmp",
  dependencies = { "fang2hou/blink-copilot" },
  opts = {
    sources = {
      default = { "lsp", "path", "snippets", "buffer", "copilot" },
      providers = {
        copilot = {
          name = "copilot",
          module = "blink-copilot",
          async = true,
        },
      },
    },
  },
},

{
  "zbirenbaum/copilot.lua",
  cmd = "Copilot",
  event = "InsertEnter",
  opts = {
    suggestion = { enabled = false },
    panel = { enabled = false },
    filetypes = {
      markdown = true,
      help = true,
    },
  },
},
{
  "saghen/blink.cmp",
  optional = true,
  dependencies = { "fang2hou/blink-copilot" },
  opts = {
    sources = {
      default = { "copilot" },
      providers = {
        copilot = {
          name = "copilot",
          module = "blink-copilot",
          score_offset = 100,
          async = true,
        },
      },
    },
  },
}

{
  "github/copilot.vim",
  cmd = "Copilot",
  event = "BufWinEnter",
  init = function()
    vim.g.copilot_no_maps = true
  end,
  config = function()
    -- Block the normal Copilot suggestions
    vim.api.nvim_create_augroup("github_copilot", { clear = true })
    vim.api.nvim_create_autocmd({ "FileType", "BufUnload" }, {
      group = "github_copilot",
      callback = function(args)
        vim.fn["copilot#On" .. args.event]()
      end,
    })
    vim.fn["copilot#OnFileType"]()
  end,
},
{
  "saghen/blink.cmp",
  dependencies = { "fang2hou/blink-copilot" },
  opts = {
    sources = {
      default = { "copilot" },
      providers = {
        copilot = {
          name = "copilot",
          module = "blink-copilot",
          score_offset = 100,
          async = true,
        },
      },
    },
  },
}

You can check the official documentation.

{
  "copilotlsp-nvim/copilot-lsp",
  init = function()
    vim.g.copilot_nes_debounce = 500
    vim.lsp.enable("copilot_ls")
    vim.keymap.set("n", "<tab>", function()
      local bufnr = vim.api.nvim_get_current_buf()
      local state = vim.b[bufnr].nes_state
      if state then
        local _ = require("copilot-lsp.nes").walk_cursor_start_edit()
          or (
            require("copilot-lsp.nes").apply_pending_nes()
            and require("copilot-lsp.nes").walk_cursor_end_edit()
          )
        return nil
      else
        return "<C-i>"
      end
    end, { desc = "Accept Copilot NES suggestion", expr = true })
  end,
}
{
  "saghen/blink.cmp",
  dependencies = { "fang2hou/blink-copilot" },
  opts = {
    sources = {
      default = { "copilot" },
      providers = {
        copilot = {
          name = "copilot",
          module = "blink-copilot",
          score_offset = 100,
          async = true,
        },
      },
    },
    keymap = {
      preset = "super-tab",
      ["<Tab>"] = {
        function(cmp)
          if vim.b[vim.api.nvim_get_current_buf()].nes_state then
            cmp.hide()
            return (
              require("copilot-lsp.nes").apply_pending_nes()
              and require("copilot-lsp.nes").walk_cursor_end_edit()
            )
          end
          if cmp.snippet_active() then
            return cmp.accept()
          else
            return cmp.select_and_accept()
          end
        end,
        "snippet_forward",
        "fallback",
      },
    },
  },
}

{
  "zbirenbaum/copilot.lua",
  enabled = false,
},
{
  "neovim/nvim-lspconfig",
  opts = {
    servers = {
      -- LazyVim Extra disabled it for copilot.lua
      copilot = { enabled = true },
    },
  },
},
{
  "mason-org/mason.nvim",
  opts = { ensure_installed = { "copilot" } },
},

{
  "zbirenbaum/copilot.lua",
  enabled = false,
},
{
  "github/copilot.vim",
  cmd = "Copilot",
  event = "BufWinEnter",
  init = function()
    vim.g.copilot_no_maps = true
  end,
  config = function()
    -- Block the normal Copilot suggestions
    vim.api.nvim_create_autocmd({ "FileType", "BufUnload" }, {
      group = "github_copilot",
      callback = function(args)
        vim.fn["copilot#On" .. args.event]()
      end,
    })
    vim.fn["copilot#OnFileType"]()
  end,
}

{
  "saghen/blink.cmp",
  optional = true,
  dependencies = {
    "fang2hou/blink-copilot",
    opts = {
      max_completions = 1,  -- Global default for max completions
      max_attempts = 2,     -- Global default for max attempts
    }
  },
  opts = {
    sources = {
      default = { "copilot" },
      providers = {
        copilot = {
          name = "copilot",
          module = "blink-copilot",
          score_offset = 100,
          async = true,
          opts = {
            -- Local options override global ones
            max_completions = 3,  -- Override global max_completions

            -- Final settings:
            -- * max_completions = 3
            -- * max_attempts = 2
            -- * all other options are default
          }
        },
      },
    },
  },
}