Vars and slash commands not registered in CodeCompanion

[mamachanko]

I've got mcphub configured via the recommended

require("codecompanion").setup({
  extensions = {
    mcphub = {
      callback = "mcphub.extensions.codecompanion",
      opts = {
        show_result_in_chat = true,  -- Show mcp tool results in chat
        make_vars = true,            -- Convert resources to #variables
        make_slash_commands = true,  -- Add prompts as /slash commands
      }
    }
  }
})

and I've studied I've looked at #101 and #110.

However, in the chat only @mcp is available as a tool. There are no mcp slash commands or vars.

🤔 I can confirm that codecompanion's extensions seems to be configured correctly:

lua print(vim.inspect(require("codecompanion.config").extensions))

gets me

{
  history = {
    enabled = true,
    opts = {
      auto_generate_title = true,
      continue_last_chat = false,
      delete_on_clearing_chat = false,
      dir_to_save = "/Users/mbrauer/.local/share/nvim/codecompanion-history",
      enable_logging = true,
      keymap = "gh"
    }
  },
  mcphub = {
    callback = "mcphub.extensions.codecompanion",
    opts = {
      make_slash_commands = true,
      make_vars = true,
      show_result_in_chat = true
    }
  }
}

And also no mcphub-related variables are registered

lua print(vim.inspect(require("codecompanion.providers.completion").variables()))

{ {
    detail = "Share the current buffer with the LLM",
    label = "#buffer",
    type = "variable"
  }, {
    detail = "Share the code that you see in Neovim with the LLM",
    label = "#viewport",
    type = "variable"
  }, {
    detail = "Share LSP information and code for the current buffer",
    label = "#lsp",
    type = "variable"
  } }

What's a good way to debug this?

[ravitemer]

What cmp provided are you using? Do you have neovim server enabled or any servers that have variables or prompts?

What's a good way to debug this?

Can you go to the location where the mcphub.nvim is downloaded mostly at ~/.local/share/nvim/lazy/mcphub.nvim/? Then add some vim.notify statements in this file inside on() listener to see if it's getting triggered or not.

mcphub.nvim/lua/mcphub/extensions/codecompanion/utils.lua

Lines 231 to 256 in bd3534e

	---@param opts MCPHubCodeCompanionConfig
	function M.setup_codecompanion_variables(opts)
	if not opts.make_vars then
	return
	end
	local mcphub = require("mcphub")
	--setup event listners to update variables, tools etc
	mcphub.on({ "servers_updated", "resource_list_changed" }, function(_)
	local hub = mcphub.get_hub_instance()
	if not hub then
	return
	end
	local resources = hub:get_resources()
	local ok, config = pcall(require, "codecompanion.config")
	if not ok then
	return
	end
	local cc_variables = config.strategies.chat.variables
	-- remove existing mcp variables that start with mcp
	for key, value in pairs(cc_variables) do
	local id = value.id or ""
	if id:sub(1, 3) == "mcp" then
	cc_variables[key] = nil
	end
	end

Thank you!

[mamachanko]

What cmp provider are you using?

I am using astronvim which configures blink.cmp

Do you have neovim server enabled or any servers that have variables or prompts?

I've got the following MCP servers. Afaik they do not have variables or prompts. Just tools. The github MCP server also has resource templates. Those don't count as prompts, or do they?

Can you go to the location where the mcphub.nvim is downloaded mostly at ~/.local/share/nvim/lazy/mcphub.nvim/? Then add some vim.notify statements in this file inside on() listener to see if it's getting triggered or not.

It looks as if the listener gets triggered as expected.

[ravitemer]

The neovim server has a prompt and some variables. Can you toggle that and see if they are available in the chat with /mcp: or #neovim:...?

The github MCP server also has resource templates. Those don't count as prompts, or do they?

Not yet! Will add support for templates with the next release where each server and its tools can be used separately in the chat buffer. 🚀

Sorry had to ask, is there a particular reason you are using those lengthy server names? They are more prone to error from LLM not always calling the entire name. You can just use some unique name instead.

[ravitemer]

@mamachanko Also this might be helpful olimorris/codecompanion.nvim#1474

[mamachanko]

Can you toggle that and see if they are available in the chat with /mcp: or #neovim:...?

That was it! Now I can see vars and slash commands.

Will add support for templates with the next release where each server and its tools can be used separately in the chat buffer. 🚀

That is excellent. I would love to curate the tools exposed to an LLM rather than providing it with everything all the time.

Sorry had to ask, is there a particular reason you are using those lengthy server names? They are more prone to error from LLM not always calling the entire name. You can just use some unique name instead.

The reason for those names is that stole servers.json from no other than olimorris's .config/mcphub/servers.json. But I will keep your note on the names in mind as to not confuse the LLMs. I was not aware at all.

Thank you very much @ravitemer !

[ravitemer]

You are welcome!

That is excellent. I would love to curate the tools exposed to an LLM rather than providing it with everything all the time.

#169 is now in draft. You can try it out if you are curious!