fix: react prompts (#2537)

lua/avante/providers/openai.lua

@@ -3,7 +3,7 @@ local Config = require("avante.config")
 local Clipboard = require("avante.clipboard")
 local Providers = require("avante.providers")
 local HistoryMessage = require("avante.history.message")
-local ReActParser = require("avante.libs.ReAct_parser")
+local ReActParser = require("avante.libs.ReAct_parser2")
 local JsonParser = require("avante.libs.jsonparser")
 local Prompts = require("avante.utils.prompts")
 local LlmTools = require("avante.llm_tools")
@@ -130,24 +130,20 @@ function M:parse_messages(opts)
       end
       if not provider_conf.disable_tools and use_ReAct_prompt then
         if msg.content[1].type == "tool_result" then
-          local tool_use = nil
+          local tool_use_msg = nil
           for _, msg_ in ipairs(opts.messages) do
             if type(msg_.content) == "table" and #msg_.content > 0 then
               if msg_.content[1].type == "tool_use" and msg_.content[1].id == msg.content[1].tool_use_id then
-                tool_use = msg_
+                tool_use_msg = msg_
                 break
               end
             end
           end
-          if tool_use then
+          if tool_use_msg then
             msg.role = "user"
             table.insert(content, {
               type = "text",
-              text = "["
-                .. tool_use.content[1].name
-                .. " for '"
-                .. (tool_use.content[1].input.path or tool_use.content[1].input.rel_path or "")
-                .. "'] Result:",
+              text = "The result of tool use " .. Utils.tool_use_to_xml(tool_use_msg.content[1]) .. " is:\n",
             })
             table.insert(content, {
               type = "text",
@@ -258,7 +254,6 @@ function M:add_text_message(ctx, text, state, opts)
   end
   local cleaned_xml_content = table.concat(cleaned_xml_lines, "\n")
   local xml = ReActParser.parse(cleaned_xml_content)
-  local has_tool_use = false
   if xml and #xml > 0 then
     local new_content_list = {}
     local xml_md_openned = false
@@ -293,42 +288,45 @@ function M:add_text_message(ctx, text, state, opts)
         end
       end
       if next(input) ~= nil then
-        has_tool_use = true
         local msg_uuid = ctx.content_uuid .. "-" .. idx
         local tool_use_id = msg_uuid
+        local tool_message_state = item.partial and "generating" or "generated"
         local msg_ = HistoryMessage:new("assistant", {
           type = "tool_use",
           name = item.tool_name,
           id = tool_use_id,
           input = input,
         }, {
-          state = state,
+          state = tool_message_state,
           uuid = msg_uuid,
           turn_id = ctx.turn_id,
         })
         msgs[#msgs + 1] = msg_
         ctx.tool_use_list = ctx.tool_use_list or {}
+        local input_json = type(input) == "string" and input or vim.json.encode(input)
         local exists = false
         for _, tool_use in ipairs(ctx.tool_use_list) do
           if tool_use.id == tool_use_id then
-            tool_use.input_json = input
+            tool_use.input_json = input_json
             exists = true
           end
         end
         if not exists then
           ctx.tool_use_list[#ctx.tool_use_list + 1] = {
+            uuid = tool_use_id,
             id = tool_use_id,
             name = item.tool_name,
-            input_json = input,
+            input_json = input_json,
+            state = "generating",
           }
         end
+        opts.on_stop({ reason = "tool_use", streaming_tool_use = item.partial })
       end
       ::continue::
     end
-    msg.message.content = table.concat(new_content_list, "\n")
+    msg.message.content = table.concat(new_content_list, "\n"):gsub("\n+$", "\n")
   end
   if opts.on_messages_add then opts.on_messages_add(msgs) end
-  if has_tool_use and state == "generating" then opts.on_stop({ reason = "tool_use", streaming_tool_use = true }) end
 end
 
 function M:add_thinking_message(ctx, text, state, opts)
@@ -537,6 +535,9 @@ function M:parse_curl_args(prompt_opts)
   Utils.debug("endpoint", provider_conf.endpoint)
   Utils.debug("model", provider_conf.model)
 
+  local stop = nil
+  if use_ReAct_prompt then stop = { "</tool_use>" } end
+
   return {
     url = Utils.url_join(provider_conf.endpoint, "/chat/completions"),
     proxy = provider_conf.proxy,
@@ -545,6 +546,7 @@ function M:parse_curl_args(prompt_opts)
     body = vim.tbl_deep_extend("force", {
       model = provider_conf.model,
       messages = self:parse_messages(prompt_opts),
+      stop = stop,
       stream = true,
       stream_options = not M.is_mistral(provider_conf.endpoint) and {
         include_usage = true,