diff --git a/lua/gp/dispatcher.lua b/lua/gp/dispatcher.lua
index 26fc76a..c616798 100644
--- a/lua/gp/dispatcher.lua
+++ b/lua/gp/dispatcher.lua
@@ -2,6 +2,8 @@
 -- Dispatcher handles the communication between the plugin and LLM providers.
 --------------------------------------------------------------------------------
 
+local uv = vim.uv or vim.loop
+
 local logger = require("gp.logger")
 local tasker = require("gp.tasker")
 local vault = require("gp.vault")
@@ -18,7 +20,7 @@ local D = {
 
 ---@param opts table #	user config
 D.setup = function(opts)
-	logger.debug("dispatcher setup started\n" .. vim.inspect(opts))
+	logger.debug("dispatcher: setup started\n" .. vim.inspect(opts))
 
 	D.config.curl_params = opts.curl_params or default_config.curl_params
 
@@ -52,9 +54,26 @@ D.setup = function(opts)
 
 	D.query_dir = helpers.prepare_dir(D.query_dir, "query store")
 
-	local files = vim.fn.glob(D.query_dir .. "/*.json", false, true)
+	local files = {}
+	local handle = uv.fs_scandir(D.query_dir)
+	if handle then
+		local name, type
+		while true do
+			name, type = uv.fs_scandir_next(handle)
+			if not name then
+				break
+			end
+			local path = D.query_dir .. "/" .. name
+			type = type or uv.fs_stat(path).type
+			if type == "file" and name:match("%.json$") then
+				table.insert(files, path)
+			end
+		end
+	end
+
+	logger.debug("dispatcher: query files: " .. #files)
 	if #files > 200 then
-		logger.debug("too many query files, truncating cache")
+		logger.debug("dispatcher: too many query files, truncating cache")
 		table.sort(files, function(a, b)
 			return a > b
 		end)
@@ -63,7 +82,7 @@ D.setup = function(opts)
 		end
 	end
 
-	logger.debug("dispatcher setup finished\n" .. vim.inspect(D))
+	logger.debug("dispatcher: setup finished\n" .. vim.inspect(D))
 end
 
 ---@param messages table
diff --git a/lua/gp/logger.lua b/lua/gp/logger.lua
index 8250941..bfac06f 100644
--- a/lua/gp/logger.lua
+++ b/lua/gp/logger.lua
@@ -33,10 +33,13 @@ M.setup = function(path, sensitive)
 	if vim.fn.isdirectory(dir) == 0 then
 		vim.fn.mkdir(dir, "p")
 	end
+
+	local file_stats = uv.fs_stat(path)
+	M.debug("Log file " .. file .. " has " .. (file_stats and file_stats.size or 0) .. " bytes")
+
 	file = path
 
-	-- truncate log file if it's too big
-	if uv.fs_stat(file) then
+	if file_stats and file_stats.size > 5 * 1024 * 1024 then
 		local content = {}
 		for line in io.lines(file) do
 			table.insert(content, line)
diff --git a/lua/gp/macros/target_filetype.lua b/lua/gp/macros/target_filetype.lua
index 21eb2f8..91be8bc 100644
--- a/lua/gp/macros/target_filetype.lua
+++ b/lua/gp/macros/target_filetype.lua
@@ -1,6 +1,6 @@
 local macro = require("gp.macro")
 
-local values = vim.fn.getcompletion("", "filetype")
+local values = nil
 
 local M = {}
 
@@ -16,6 +16,9 @@ M = {
 	end,
 
 	completion = function(params)
+		if not values then
+			values = vim.fn.getcompletion("", "filetype")
+		end
 		return values
 	end,