diff --git a/.gitignore b/.gitignore
index 15201ac..d86e4ff 100644
--- a/.gitignore
+++ b/.gitignore
@@ -165,7 +165,7 @@ cython_debug/
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
+.idea/
 
 # PyPI configuration file
 .pypirc
diff --git a/audit/__init__.py b/audit/__init__.py
new file mode 100644
index 0000000..9f104b7
--- /dev/null
+++ b/audit/__init__.py
@@ -0,0 +1,131 @@
+import os
+import re
+import time
+import uuid
+import xml.etree.ElementTree as ET
+from langchain_openai import ChatOpenAI
+from langchain_openai import OpenAIEmbeddings
+from langchain_core.messages import SystemMessage
+from langchain_core.runnables.history import RunnableWithMessageHistory
+from langchain_core.prompts import ChatPromptTemplate, MessagesPlaceholder
+from langchain_community.chat_message_histories import ChatMessageHistory
+
+from logger import Logger
+from audit import callback
+from audit.prompt import SYSTEM_PROMPT
+
+reasoning_model = 'gemini-2.0-flash-thinking-exp'
+embedding_model = 'text-embedding-3-large'
+
+xml_pattern = r'<root>.*?</root>'
+
+
+class Audit:
+    def __init__(self):
+        self.raw_chain = None
+        self.source_files_list = []
+        self.chat_history = ChatMessageHistory()
+        self.session_id = uuid.uuid4().hex
+        self.response_callback = callback.CustomCallbackHandler()
+        self.embedding = OpenAIEmbeddings(model=embedding_model)
+        self.llm = ChatOpenAI(model=reasoning_model, streaming=True, callbacks=[self.response_callback])
+        self.log = Logger('audit')
+        self.prompt = ChatPromptTemplate.from_messages([
+            SystemMessage(content=SYSTEM_PROMPT),
+            MessagesPlaceholder(variable_name='messages'),
+            ('human', '{input}'),
+        ])
+
+    def audit(self, callback_function):
+        self.log.info('Start auditing')
+
+        input_content = ''
+        while True:
+            time.sleep(3)
+            result = self.send_message(input_content)
+            xml_match = re.search(xml_pattern, result, re.DOTALL)
+
+            if xml_match:
+                xml_content = xml_match.group(0)
+                root = ET.fromstring(xml_content)
+
+                action = root.find('action').text
+                content = root.find('content').text
+
+                if action == 'QUERY STRUCTURE':
+                    self.log.info('Request to query project structure')
+                    input_content = '\n'.join(x for x in self.source_files_list)
+                    continue
+                elif action == 'QUERY SOURCE':
+                    self.log.info(f'Request source code: {content}')
+                    input_content = open(content, 'r', encoding='utf-8').read()
+                    continue
+                elif action == 'OUTPUT RESULT':
+                    self.log.warning(f'Audit result: \n{content}\n')
+                    callback_function(content)  # Callback function, used to obtain results externally
+                    input_content = ''
+                    continue
+                else:
+                    self.log.critical(f'Unknown action! {action}')
+                    break
+
+    def send_message(self, input_content):
+        self.response_callback.temp_content = ''
+
+        if input_content == '':
+            input_content = 'nothing'
+
+        input_dict = {
+            'input': input_content,
+            'context': '',
+        }
+        config_dict = {
+            'configurable': {'session_id': self.session_id}
+        }
+
+        self.raw_chain = self.prompt | self.llm
+        chain_with_message_history = RunnableWithMessageHistory(
+            self.raw_chain,
+            lambda session_id: self.chat_history,
+            input_messages_key='input',
+            history_messages_key='messages',
+        )
+
+        for _ in chain_with_message_history.stream(input_dict, config_dict):
+            pass
+
+        return self.response_callback.temp_content
+
+    def load_source_files(self, path, language):
+        self.log.info('Loading source files')
+
+        if language == 'php':
+            suffixes = ['.php', '.php3', 'php4', 'php5']
+        elif language == 'python':
+            suffixes = ['.py']
+        elif language == 'java':
+            suffixes = ['.java']
+        elif language == 'c':
+            suffixes = ['.c']
+        elif language == 'c++':
+            suffixes = ['.cpp', 'cc']
+        elif language == 'javascript':
+            suffixes = ['.js']
+        elif language == 'go':
+            suffixes = ['.go']
+        else:
+            self.log.critical('Language not supported!')
+            return
+
+        for root, dirs, files in os.walk(path):
+            for file_name in files:
+                hit = False
+                for suffix in suffixes:
+                    if file_name.endswith(suffix):
+                        hit = True
+                        break
+
+                if hit:
+                    self.source_files_list.append(os.path.join(root, file_name))
+
+        self.log.info(f'Finished loading source files. total files: {len(self.source_files_list)}')
diff --git a/audit/callback.py b/audit/callback.py
new file mode 100644
index 0000000..f9d7bf5
--- /dev/null
+++ b/audit/callback.py
@@ -0,0 +1,13 @@
+from langchain_core.callbacks import BaseCallbackHandler
+
+
+class CustomCallbackHandler(BaseCallbackHandler):
+    def __init__(self):
+        self.temp_content = ''
+
+    def on_llm_new_token(self, token: str, **kwargs) -> None:
+        self.temp_content += token
+
+    def on_llm_end(self, response, **kwargs):
+        pass
+
diff --git a/audit/prompt.py b/audit/prompt.py
new file mode 100644
index 0000000..ed9cbd4
--- /dev/null
+++ b/audit/prompt.py
@@ -0,0 +1,36 @@
+SYSTEM_PROMPT = """
+You are an intelligent code auditor. I will provide you with a source code. Please strictly follow the following requirements to conduct code audit.
+All your output must strictly follow the following specifications. It is forbidden to output in any other form (including plain text, Markdown, etc.). 
+and it is forbidden to bring "`" when outputting:
+
+1. Query project structure:
+<root>
+<action>QUERY STRUCTURE</action>
+<content></content>
+</root>
+
+2. Query code files
+<root>
+<action>QUERY SOURCE</action>
+<content>the absolute path of the file you want to query</content>
+</root>
+
+3. Output audit results
+<root>
+<action>OUTPUT RESULT</action>
+<content>the audit results you want to output</content>
+</root>
+
+4. End the audit task
+<root>
+<action>FINISH TASK</action>
+<content></content>
+</root>
+
+Important things:
+1. When the user sends you "nothing", you need to decide the next step based on the current audit progress;
+2. When you make an action to query the project structure, the user will send you the following format (C:\\Users\\yvling\\Desktop\\PHP-Vuln\\src\\index.php), which is a text containing the absolute paths of several source code files. You need to construct the project structure that you can understand based on these contents;
+3. When you need to query the content of a code file, please note that you can only query one file at a time. Please follow The above format outputs the absolute path of the file to be queried;
+4. After you output the audit results, the user will reply with an empty string. Please make sure that all code files have been audited before ending the audit task;
+5. In any case, you must strictly follow the several action formats given above for output. Any content outside the output format is prohibited. Do not try to ask or suggest;
+"""
diff --git a/logger/__init__.py b/logger/__init__.py
new file mode 100644
index 0000000..7bb79a1
--- /dev/null
+++ b/logger/__init__.py
@@ -0,0 +1,40 @@
+from datetime import datetime
+
+
+LOG_COLORS = {
+    'DEBUG': '\033[94m',    # 蓝色
+    'INFO': '\033[92m',     # 绿色
+    'WARNING': '\033[93m',  # 黄色
+    'ERROR': '\033[91m',    # 红色
+    'CRITICAL': '\033[95m'  # 紫色
+}
+RESET_COLOR = '\033[0m'
+
+
+def log_with_color(level, message):
+    color = LOG_COLORS.get(level, RESET_COLOR)
+    prefix = f"[{level}]"
+    date = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+    formatted_message = f"{color}{date} {prefix} {message}{RESET_COLOR}"
+
+    print(formatted_message)
+
+
+class Logger:
+    def __init__(self, name):
+        pass
+
+    def debug(self, message):
+        log_with_color("DEBUG", message)
+
+    def info(self, message):
+        log_with_color("INFO", message)
+
+    def warning(self, message):
+        log_with_color("WARNING", message)
+
+    def error(self, message):
+        log_with_color("ERROR", message)
+
+    def critical(self, message):
+        log_with_color("CRITICAL", message)
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..5b29b82
--- /dev/null
+++ b/main.py
@@ -0,0 +1,23 @@
+import os
+import warnings
+from audit import Audit
+
+
+warnings.simplefilter('ignore', FutureWarning)
+
+os.environ['OPENAI_API_BASE'] = 'https://yunwu.ai/v1'
+os.environ['OPENAI_API_KEY'] = 'sk-SQhmr2wNQa2BpohUrxgJOFIDY9ODSxUkLQLWWlPD9qDNVsN1'
+
+
+def result_callback(result):
+    pass
+
+
+if __name__ == '__main__':
+    src_root = r'C:\Users\yvling\Desktop\PHP-Vuln'
+    language = 'php'
+
+    audit = Audit()
+    audit.load_source_files(src_root, language)
+    audit.audit(result_callback)
+
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..24201a5
Binary files /dev/null and b/requirements.txt differ