@@ -0,0 +1,162 @@
+#!/usr/bin/env python3
+"""DAP protocol monitor - sits between VS Code and MicroPython debugpy."""
+
+import socket
+import threading
+import json
+import time
+import sys
+
+class DAPMonitor:
+def __init__(self, listen_port=5679, target_host='127.0.0.1', target_port=5678):
+self.listen_port = listen_port
+self.target_host = target_host
+self.target_port = target_port
+self.client_sock = None
+self.server_sock = None
+
+def start(self):
+"""Start the DAP monitor proxy."""
+print(f"DAP Monitor starting on port {self.listen_port}")
+print(f"Will forward to {self.target_host}:{self.target_port}")
+print("Start MicroPython debugpy server first, then connect VS Code to port 5679")
+
+# Create listening socket
+listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+listener.bind(('127.0.0.1', self.listen_port))
+listener.listen(1)
+
+print(f"Listening for VS Code connection on port {self.listen_port}...")
+
+try:
+# Wait for VS Code to connect
+self.client_sock, client_addr = listener.accept()
+print(f"VS Code connected from {client_addr}")
+
+# Connect to MicroPython debugpy server
+self.server_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+self.server_sock.connect((self.target_host, self.target_port))
+print(f"Connected to MicroPython debugpy at {self.target_host}:{self.target_port}")
+
+# Start forwarding threads
+threading.Thread(target=self.forward_client_to_server, daemon=True).start()
+threading.Thread(target=self.forward_server_to_client, daemon=True).start()
+
+print("DAP Monitor active - press Ctrl+C to stop")
+while True:
+time.sleep(1)
+
+except KeyboardInterrupt:
+print("\nStopping DAP Monitor...")
+except Exception as e:
+print(f"Error: {e}")
+finally:
+self.cleanup()
+
+def forward_client_to_server(self):
+"""Forward messages from VS Code client to MicroPython server."""
+try:
+while True:
+data = self.receive_dap_message(self.client_sock, "VS Code")
+if data is None:
+break
+self.send_raw_data(self.server_sock, data)
+except Exception as e:
+print(f"Client->Server forwarding error: {e}")
+
+def forward_server_to_client(self):
+"""Forward messages from MicroPython server to VS Code client."""
+try:
+while True:
+data = self.receive_dap_message(self.server_sock, "MicroPython")
+if data is None:
+break
+self.send_raw_data(self.client_sock, data)
+except Exception as e:
+print(f"Server->Client forwarding error: {e}")
+
+def receive_dap_message(self, sock, source):
+"""Receive and log a DAP message."""
+try:
+# Read headers
+header = b""
+while b"\r\n\r\n" not in header:
+byte = sock.recv(1)
+if not byte:
+return None
+header += byte
+
+# Parse content length
+header_str = header.decode('utf-8')
+content_length = 0
+for line in header_str.split('\r\n'):
+if line.startswith('Content-Length:'):
+content_length = int(line.split(':', 1)[1].strip())
+break
+
+if content_length == 0:
+return None
+
+# Read content
+content = b""
+while len(content) < content_length:
+chunk = sock.recv(content_length - len(content))
+if not chunk:
+return None
+content += chunk
+
+# Log the message
+try:
+message = json.loads(content.decode('utf-8'))
+msg_type = message.get('type', 'unknown')
+command = message.get('command', message.get('event', 'unknown'))
+seq = message.get('seq', 0)
+
+print(f"\n[{source}] {msg_type.upper()}: {command} (seq={seq})")
+
+if msg_type == 'request':
+args = message.get('arguments', {})
+if args:
+print(f" Arguments: {json.dumps(args, indent=2)}")
+elif msg_type == 'response':
+success = message.get('success', False)
+req_seq = message.get('request_seq', 0)
+print(f" Success: {success}, Request Seq: {req_seq}")
+body = message.get('body')
+if body:
+print(f" Body: {json.dumps(body, indent=2)}")
+msg = message.get('message')
+if msg:
+print(f" Message: {msg}")
+elif msg_type == 'event':
+body = message.get('body', {})
+if body:
+print(f" Body: {json.dumps(body, indent=2)}")
+
+except json.JSONDecodeError:
+print(f"\n[{source}] Invalid JSON: {content}")
+
+return header + content
+
+except Exception as e:
+print(f"Error receiving from {source}: {e}")
+return None
+
+def send_raw_data(self, sock, data):
+"""Send raw data to socket."""
+try:
+sock.send(data)
+except Exception as e:
+print(f"Error sending data: {e}")
+
+def cleanup(self):
+"""Clean up sockets."""
+if self.client_sock:
+self.client_sock.close()
+if self.server_sock:
+self.server_sock.close()
+
+if __name__ == "__main__":
+monitor = DAPMonitor()
+monitor.start()

@@ -0,0 +1,20 @@
+"""MicroPython debugpy implementation.
+
+A minimal port of debugpy for MicroPython to enable VS Code debugging support.
+This implementation focuses on the core DAP (Debug Adapter Protocol) functionality
+needed for basic debugging operations like breakpoints, stepping, and variable inspection.
+"""
+
+__version__ = "0.1.0"
+
+from .public_api import listen, wait_for_client, breakpoint, debug_this_thread
+from .common.constants import DEFAULT_HOST, DEFAULT_PORT
+
+__all__ = [
+"listen",
+"wait_for_client",
+"breakpoint",
+"debug_this_thread",
+"DEFAULT_HOST",
+"DEFAULT_PORT",
+]

@@ -0,0 +1 @@
+# Common utilities and constants for debugpy