WIP: Save agent roles integration work before CHORUS rebrand

- Agent roles and coordination features
- Chat API integration testing
- New configuration and workspace management

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

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

vendor/github.com/marten-seemann/tcp/conn_stub.go

@@ -0,0 +1,16 @@
+// Copyright 2016 Mikio Hara. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!openbsd
+
+package tcp
+
+import (
+	"errors"
+	"net"
+)
+
+func (c *Conn) originalDst(la, ra *net.TCPAddr) (net.Addr, error) {
+	return nil, errors.New("not implemented")
+}