MCP-llms-txt

Okay, I understand. You want me to: 1. Create an MCP (presumably referring to a Minecraft Protocol) server. 2. This server should be related to the project "SecretiveShell/Awesome-llms-txt". 3. I should add documentation directly into our conversation, using MCP resources (presumably meaning Minecraft Protocol resources, like packets and data structures). This is a complex request that requires significant coding and understanding of Minecraft's internal workings. I can't *actually* create and host a server for you. That requires a development environment, a Minecraft server instance, and the ability to write and execute code. However, I *can* provide you with a conceptual outline and code snippets to get you started, along with documentation integrated into our conversation. I'll focus on the core aspects of handling a connection and sending/receiving basic data. **Conceptual Outline** 1. **Server Setup:** Use a programming language like Java (the language Minecraft is written in) or Python (with a library like `mcstatus` or `nbt`) to create a server socket that listens for incoming connections on a specific port (e.g., 25565, the default Minecraft port). 2. **Handshake:** The Minecraft client initiates a handshake. You need to parse this handshake packet to determine the protocol version and the intended server state (status or login). 3. **Status/Login:** * **Status:** If the client requests status, you send back a JSON response containing server information (MOTD, player count, etc.). * **Login:** If the client requests login, you handle authentication (if required) and then transition the client to the play state. 4. **Play State:** This is where the core game logic happens. You receive packets from the client (e.g., movement, chat messages) and send packets back to the client (e.g., world updates, entity positions). **Simplified Code Snippet (Python using `socket` - for demonstration only, not a full MCP implementation):** ```python import socket import json HOST = '127.0.0.1' # Standard loopback interface address (localhost) PORT = 25565 # Minecraft default port with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: s.bind((HOST, PORT)) s.listen() print(f"Server listening on {HOST}:{PORT}") conn, addr = s.accept() with conn: print(f"Connected by {addr}") while True: data = conn.recv(1024) # Receive up to 1024 bytes if not data: break print(f"Received: {data}") # **VERY SIMPLIFIED HANDSHAKE EXAMPLE (DOES NOT PARSE PROPERLY)** if b'\x00\x04' in data: # Crude check for a handshake-like packet print("Possible Handshake detected") # **IN REALITY, YOU NEED TO PARSE THE VARINTS AND DATA PROPERLY** # Example Status Response (Simplified) status_response = { "version": {"name": "My Awesome Server", "protocol": 757}, "players": {"max": 100, "online": 10, "sample": []}, "description": {"text": "A server for Awesome-llms-txt!"} } json_response = json.dumps(status_response) # **IMPORTANT: Minecraft requires a VarInt length prefix before the JSON** # **This is a placeholder - you need to implement VarInt encoding** length_prefix = len(json_response).to_bytes(1, 'big') # Incorrect VarInt encoding conn.sendall(length_prefix + json_response.encode('utf-8')) else: conn.sendall(b"Received your data!") # Echo back (for testing) ``` **Explanation and MCP Documentation Integration** * **`socket.socket(socket.AF_INET, socket.SOCK_STREAM)`:** Creates a TCP socket. TCP is the protocol Minecraft uses. This corresponds to the underlying network layer. * **`s.bind((HOST, PORT))`:** Binds the socket to a specific IP address and port. * **`s.listen()`:** Starts listening for incoming connections. * **`conn, addr = s.accept()`:** Accepts a connection. `conn` is a new socket object for communicating with the client, and `addr` is the client's address. * **`conn.recv(1024)`:** Receives data from the client. The `1024` is the maximum number of bytes to receive at once. * **Handshake (MCP Relevant):** The handshake is the first packet sent by the client. It contains: * **Packet ID (VarInt):** `0x00` for handshake. * **Protocol Version (VarInt):** The Minecraft protocol version the client is using. This is *crucial* for compatibility. 757 is for 1.17.1. You *must* handle different protocol versions. * **Server Address (String):** The address the client connected to. * **Server Port (Unsigned Short):** The port the client connected to. * **Next State (VarInt):** `1` for status, `2` for login. **VarInt Encoding:** A VarInt is a variable-length integer. It uses one or more bytes to represent an integer. Each byte (except the last) has its most significant bit set to 1. The lower 7 bits of each byte are used to store the integer's value. This is a *critical* part of the Minecraft protocol. The example code *incorrectly* uses `len(json_response).to_bytes(1, 'big')` which is *not* a VarInt. You need a proper VarInt encoding function. ```python def encode_varint(number): buf = [] while True: byte = number & 0x7F # Get the lowest 7 bits number >>= 7 if number: byte |= 0x80 # Set the MSB to indicate more bytes buf.append(byte) if not number: break return bytes(buf) ``` * **Status Response (MCP Relevant):** The status response is a JSON string that contains server information. The JSON is *prefixed* with a VarInt indicating the length of the JSON string. The structure of the JSON is defined by the Minecraft protocol. The example code provides a simplified version. **Next Steps and Considerations** 1. **VarInt Implementation:** Implement proper VarInt encoding and decoding. This is essential for handling all packets. 2. **Packet Parsing:** Implement proper packet parsing based on the protocol version. Use a library or write your own code to read VarInts, strings, and other data types from the byte stream. 3. **Protocol Version Handling:** Support multiple Minecraft protocol versions. This is a *major* undertaking, as the protocol changes frequently. You'll need to maintain a mapping of protocol versions to packet structures. 4. **Authentication:** Implement authentication if you want to require players to log in with a Minecraft account. This involves interacting with Mojang's authentication servers. 5. **Game Logic:** Implement the core game logic for your server. This will involve handling player movement, world updates, and other game events. 6. **NBT Data:** Minecraft uses Named Binary Tag (NBT) format for storing world data, player data, and other complex data structures. You'll need a library to read and write NBT data. 7. **Asynchronous Handling:** Use asynchronous programming (e.g., `asyncio` in Python) to handle multiple clients concurrently. This is a very high-level overview. Building a Minecraft server from scratch is a significant project. Start with the basics (handshake and status) and gradually add more features. Good luck! Let me know if you have more specific questions. I can provide more detailed code snippets and explanations for specific parts of the protocol.