Configuring the Inline Assistant

IMPORTANT

Only http adapters are supported for the inline assistant.

CodeCompanion provides an inline interaction for quick, direct editing of your code. Unlike the chat buffer, the inline assistant integrates responses directly into the current buffer—allowing the LLM to add or replace code as needed.

Changing Adapter

By default, CodeCompanion sets the copilot adapter for the inline assistant. You can change this to any other HTTP adapter:

require("codecompanion").setup({
  interactions = {
    inline = {
      adapter = {
        name = "anthropic",
        model = "claude-haiku-4-5-20251001"
      },
    },
  },
})

See the section on HTTP Adapters for more information.

Keymaps

The inline assistant supports keymaps for accepting or rejecting changes:

require("codecompanion").setup({
  interactions = {
    inline = {
      keymaps = {
        accept_change = {
          modes = { n = "ga" },
          description = "Accept the suggested change",
        },
        reject_change = {
          modes = { n = "gr" },
          opts = { nowait = true },
          description = "Reject the suggested change",
        },
      },
    },
  },
})

In this example, ga accepts inline changes, while gr rejects them.

You can also cancel an inline request with:

require("codecompanion").setup({
  interactions = {
    inline = {
      keymaps = {
        stop = {
          modes = { n = "q" },
          index = 4,
          callback = "keymaps.stop",
          description = "Stop request",
        },
      },
    },
  },
})

Variables

The plugin comes with a number of variables that can be used alongside your prompt using the #{} syntax (e.g., #{my_new_var}). You can also add your own:

require("codecompanion").setup({
  interactions = {
    inline = {
      variables = {
        ["my_new_var"] = {
          ---@return string
          callback = "/Users/Oli/Code/my_var.lua",
          description = "My shiny new variable",
          opts = {
            contains_code = true,
          },
        },
      }
    }
  }
})

Layout

If the inline prompt creates a new buffer, you can also customize if this should be output in a vertical/horizontal split or a new buffer:

require("codecompanion").setup({
  display = {
    inline = {
      layout = "vertical", -- vertical|horizontal|buffer
    },
  }
})

Diff

Please see the Diff section on the Chat Buffer page for configuration options.