diff --git a/lua/avante/path.lua b/lua/avante/path.lua
index a7b5053..794d02e 100644
--- a/lua/avante/path.lua
+++ b/lua/avante/path.lua
@@ -31,7 +31,17 @@ local History = {}
 function History.get_history_dir(bufnr)
   local dirname = generate_project_dirname_in_storage(bufnr)
   local history_dir = Path:new(Config.history.storage_path):joinpath(dirname):joinpath("history")
-  if not history_dir:exists() then history_dir:mkdir({ parents = true }) end
+  if not history_dir:exists() then
+    history_dir:mkdir({ parents = true })
+
+    local metadata_filepath = history_dir:joinpath("metadata.json")
+    local metadata = {
+      project_root = Utils.root.get({
+        buf = bufnr,
+      }),
+    }
+    metadata_filepath:write(vim.json.encode(metadata), "w")
+  end
   return history_dir
 end
 
@@ -105,13 +115,14 @@ end
 
 function History.save_latest_filename(bufnr, filename)
   local metadata_filepath = History.get_metadata_filepath(bufnr)
-  local metadata
-  if not metadata_filepath:exists() then
-    metadata = {}
-  else
+  local metadata = {}
+  if metadata_filepath:exists() then
     local metadata_content = metadata_filepath:read()
     metadata = vim.json.decode(metadata_content)
   end
+  if metadata.project_root == nil then metadata.project_root = Utils.root.get({
+    buf = bufnr,
+  }) end
   metadata.latest_filename = filename
   metadata_filepath:write(vim.json.encode(metadata), "w")
 end
@@ -187,6 +198,56 @@ end
 
 P.history = History
 
+---@return table[] List of projects with their information
+function P.list_projects()
+  local projects_dir = Path:new(Config.history.storage_path):joinpath("projects")
+  if not projects_dir:exists() then return {} end
+
+  local projects = {}
+  local dirs = Scan.scan_dir(tostring(projects_dir), { depth = 1, add_dirs = true, only_dirs = true })
+
+  for _, dir_path in ipairs(dirs) do
+    local project_dir = Path:new(dir_path)
+    local history_dir = project_dir:joinpath("history")
+
+    local metadata_file = history_dir:joinpath("metadata.json")
+    local project_root = ""
+    if metadata_file:exists() then
+      local content = metadata_file:read()
+      if content then
+        local metadata = vim.json.decode(content)
+        if metadata and metadata.project_root then project_root = metadata.project_root end
+      end
+    end
+
+    -- Skip if project_root is empty
+    if project_root == "" then goto continue end
+
+    -- Count history files
+    local history_count = 0
+    if history_dir:exists() then
+      local history_files = vim.fn.glob(tostring(history_dir:joinpath("*.json")), true, true)
+      for _, file in ipairs(history_files) do
+        if not file:match("metadata.json") then history_count = history_count + 1 end
+      end
+    end
+
+    table.insert(projects, {
+      name = filepath_to_filename(project_dir),
+      root = project_root,
+      history_count = history_count,
+      directory = tostring(project_dir),
+    })
+
+    ::continue::
+  end
+
+  -- Sort by history count (most active projects first)
+  table.sort(projects, function(a, b) return a.history_count > b.history_count end)
+
+  return projects
+end
+
 -- Prompt path
 local Prompt = {}
 
diff --git a/lua/avante/utils/init.lua b/lua/avante/utils/init.lua
index ae164d1..a3cf7c5 100644
--- a/lua/avante/utils/init.lua
+++ b/lua/avante/utils/init.lua
@@ -1607,6 +1607,44 @@ function M.uuid()
   end)
 end
 
+---Parse command arguments (fargs) into a structured format
+---@param fargs string[] Command arguments
+---@param options? {collect_remaining?: boolean, boolean_keys?: string[]} Options for parsing
+---@return table parsed_args Key-value pairs from arguments
+---@return string|nil remaining_text Concatenated remaining arguments (if collect_remaining is true)
+function M.parse_args(fargs, options)
+  options = options or {}
+  local parsed_args = {}
+  local remaining_parts = {}
+  local boolean_keys = options.boolean_keys or {}
+
+  -- Create a lookup table for boolean keys for faster access
+  local boolean_keys_lookup = {}
+  for _, key in ipairs(boolean_keys) do
+    boolean_keys_lookup[key] = true
+  end
+
+  for _, arg in ipairs(fargs) do
+    local key, value = arg:match("([%w_]+)=(.+)")
+
+    if key and value then
+      -- Convert "true"/"false" string values to boolean for specified keys
+      if boolean_keys_lookup[key] or value == "true" or value == "false" then
+        parsed_args[key] = (value == "true")
+      else
+        parsed_args[key] = value
+      end
+    elseif options.collect_remaining then
+      table.insert(remaining_parts, arg)
+    end
+  end
+
+  -- Return the parsed arguments and optionally the concatenated remaining text
+  if options.collect_remaining and #remaining_parts > 0 then return parsed_args, table.concat(remaining_parts, " ") end
+
+  return parsed_args
+end
+
 ---@param tool_use AvanteLLMToolUse
 function M.tool_use_to_xml(tool_use)
   local tool_use_json = vim.json.encode({
diff --git a/plugin/avante.lua b/plugin/avante.lua
index 96db02d..161d25a 100644
--- a/plugin/avante.lua
+++ b/plugin/avante.lua
@@ -16,6 +16,7 @@ vim.g.avante = 1
 local Clipboard = require("avante.clipboard")
 local Config = require("avante.config")
 local Utils = require("avante.utils")
+local P = require("avante.path")
 local api = vim.api
 
 if Config.support_paste_image() then
@@ -51,52 +52,62 @@ local function cmd(n, c, o)
   api.nvim_create_user_command("Avante" .. n, c, o)
 end
 
+local function ask_complete(prefix, _, _)
+  local candidates = {} ---@type string[]
+  vim.list_extend(
+    candidates,
+    ---@param x string
+    vim.tbl_map(function(x) return "position=" .. x end, { "left", "right", "top", "bottom" })
+  )
+  vim.list_extend(
+    candidates,
+    ---@param x string
+    vim.tbl_map(function(x) return "project_root=" .. x.root end, P.list_projects())
+  )
+  return vim.tbl_filter(function(candidate) return vim.startswith(candidate, prefix) end, candidates)
+end
+
 cmd("Ask", function(opts)
   ---@type AskOptions
   local args = { question = nil, win = {} }
-  local q_parts = {}
-  local q_ask = nil
-  for _, arg in ipairs(opts.fargs) do
-    local value = arg:match("position=(%w+)")
-    local ask = arg:match("ask=(%w+)")
-    if ask ~= nil then
-      q_ask = ask == "true"
-    elseif value then
-      args.win.position = value
-    else
-      table.insert(q_parts, arg)
-    end
-  end
-  require("avante.api").ask(
-    vim.tbl_deep_extend("force", args, { ask = q_ask, question = #q_parts > 0 and table.concat(q_parts, " ") or nil })
-  )
+
+  local parsed_args, question = Utils.parse_args(opts.fargs, {
+    collect_remaining = true,
+    boolean_keys = { "ask" },
+  })
+
+  if parsed_args.position then args.win.position = parsed_args.position end
+
+  require("avante.api").ask(vim.tbl_deep_extend("force", args, {
+    ask = parsed_args.ask,
+    project_root = parsed_args.project_root,
+    question = question or nil,
+  }))
 end, {
   desc = "avante: ask AI for code suggestions",
   nargs = "*",
-  complete = function(_, _, _)
-    local candidates = {} ---@type string[]
-    vim.list_extend(
-      candidates,
-      ---@param x string
-      vim.tbl_map(function(x) return "position=" .. x end, { "left", "right", "top", "bottom" })
-    )
-    vim.list_extend(candidates, vim.tbl_map(function(x) return "ask=" .. x end, { "true", "false" }))
-    return candidates
-  end,
+  complete = ask_complete,
 })
-cmd("Chat", function() require("avante.api").ask({ ask = false }) end, { desc = "avante: chat with the codebase" })
-cmd(
-  "ChatNew",
-  function() require("avante.api").ask({ ask = false, new_chat = true }) end,
-  { desc = "avante: create new chat" }
-)
+cmd("Chat", function(opts)
+  local args = Utils.parse_args(opts.fargs)
+  args.ask = false
+
+  require("avante.api").ask(args)
+end, {
+  desc = "avante: chat with the codebase",
+  nargs = "*",
+  complete = ask_complete,
+})
+cmd("ChatNew", function(opts)
+  local args = Utils.parse_args(opts.fargs)
+  args.ask = false
+  args.new_chat = true
+  require("avante.api").ask(args)
+end, { desc = "avante: create new chat", nargs = "*", complete = ask_complete })
 cmd("Toggle", function() require("avante").toggle() end, { desc = "avante: toggle AI panel" })
 cmd("Build", function(opts)
-  local args = {}
-  for _, arg in ipairs(opts.fargs) do
-    local key, value = arg:match("(%w+)=(%w+)")
-    if key and value then args[key] = value == "true" end
-  end
+  local args = Utils.parse_args(opts.fargs)
+
   if args.source == nil then args.source = false end
 
   require("avante.api").build(args)
@@ -149,11 +160,10 @@ cmd("Clear", function(opts)
     end
     sidebar:clear_history()
   elseif arg == "cache" then
-    local P = require("avante.path")
     local history_path = P.history_path:absolute()
     local cache_path = P.cache_path:absolute()
     local prompt = string.format("Recursively delete %s and %s?", history_path, cache_path)
-    if vim.fn.confirm(prompt, "&Yes\n&No", 2) == 1 then require("avante.path").clear() end
+    if vim.fn.confirm(prompt, "&Yes\n&No", 2) == 1 then P.clear() end
   else
     Utils.error("Invalid argument. Valid arguments: 'history', 'memory', 'cache'")
     return