Initial commit: Bzzz P2P Task Coordination System with Antennae meta-discussion layer

- libp2p networking with mDNS discovery
- GitHub Issues integration for atomic task management
- PubSub messaging for coordination and meta-discussion
- Hypercore-inspired distributed logging
- Tested P2P network formation between WALNUT and IRONWOOD nodes

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

p2p/node.go

@@ -0,0 +1,148 @@
+package p2p
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/libp2p/go-libp2p"
+	"github.com/libp2p/go-libp2p/core/host"
+	"github.com/libp2p/go-libp2p/core/peer"
+	"github.com/libp2p/go-libp2p/p2p/security/noise"
+	"github.com/libp2p/go-libp2p/p2p/transport/tcp"
+	"github.com/multiformats/go-multiaddr"
+)
+
+// Node represents a Bzzz P2P node
+type Node struct {
+	host   host.Host
+	ctx    context.Context
+	cancel context.CancelFunc
+	config *Config
+}
+
+// NewNode creates a new P2P node with the given configuration
+func NewNode(ctx context.Context, opts ...Option) (*Node, error) {
+	config := DefaultConfig()
+	for _, opt := range opts {
+		opt(config)
+	}
+
+	nodeCtx, cancel := context.WithCancel(ctx)
+
+	// Build multiaddresses for listening
+	var listenAddrs []multiaddr.Multiaddr
+	for _, addr := range config.ListenAddresses {
+		ma, err := multiaddr.NewMultiaddr(addr)
+		if err != nil {
+			cancel()
+			return nil, fmt.Errorf("invalid listen address %s: %w", addr, err)
+		}
+		listenAddrs = append(listenAddrs, ma)
+	}
+
+	// Create libp2p host with security and transport options
+	h, err := libp2p.New(
+		libp2p.ListenAddrs(listenAddrs...),
+		libp2p.Security(noise.ID, noise.New),
+		libp2p.Transport(tcp.NewTCPTransport),
+		libp2p.DefaultMuxers,
+		libp2p.EnableRelay(),
+	)
+	if err != nil {
+		cancel()
+		return nil, fmt.Errorf("failed to create libp2p host: %w", err)
+	}
+
+	node := &Node{
+		host:   h,
+		ctx:    nodeCtx,
+		cancel: cancel,
+		config: config,
+	}
+
+	// Start background processes
+	go node.startBackgroundTasks()
+
+	return node, nil
+}
+
+// Host returns the underlying libp2p host
+func (n *Node) Host() host.Host {
+	return n.host
+}
+
+// ID returns the peer ID of this node
+func (n *Node) ID() peer.ID {
+	return n.host.ID()
+}
+
+// Addresses returns the multiaddresses this node is listening on
+func (n *Node) Addresses() []multiaddr.Multiaddr {
+	return n.host.Addrs()
+}
+
+// Connect connects to a peer at the given multiaddress
+func (n *Node) Connect(ctx context.Context, addr string) error {
+	ma, err := multiaddr.NewMultiaddr(addr)
+	if err != nil {
+		return fmt.Errorf("invalid multiaddress %s: %w", addr, err)
+	}
+
+	addrInfo, err := peer.AddrInfoFromP2pAddr(ma)
+	if err != nil {
+		return fmt.Errorf("failed to parse addr info: %w", err)
+	}
+
+	return n.host.Connect(ctx, *addrInfo)
+}
+
+// Peers returns the list of connected peers
+func (n *Node) Peers() []peer.ID {
+	return n.host.Network().Peers()
+}
+
+// ConnectedPeers returns the number of connected peers
+func (n *Node) ConnectedPeers() int {
+	return len(n.Peers())
+}
+
+// startBackgroundTasks starts background maintenance tasks
+func (n *Node) startBackgroundTasks() {
+	ticker := time.NewTicker(30 * time.Second)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-n.ctx.Done():
+			return
+		case <-ticker.C:
+			// Periodic maintenance tasks
+			n.logConnectionStatus()
+		}
+	}
+}
+
+// logConnectionStatus logs the current connection status
+func (n *Node) logConnectionStatus() {
+	peers := n.Peers()
+	fmt.Printf("🐝 Bzzz Node Status - ID: %s, Connected Peers: %d\n", 
+		n.ID().ShortString(), len(peers))
+	
+	if len(peers) > 0 {
+		fmt.Printf("   Connected to: ")
+		for i, p := range peers {
+			if i > 0 {
+				fmt.Printf(", ")
+			}
+			fmt.Printf("%s", p.ShortString())
+		}
+		fmt.Println()
+	}
+}
+
+// Close shuts down the node
+func (n *Node) Close() error {
+	n.cancel()
+	return n.host.Close()
+}