diff --git a/src/wg/relayconf.h b/src/wg/relayconf.h
new file mode 100644
index 0000000..177832a
--- /dev/null
+++ b/src/wg/relayconf.h
@@ -0,0 +1,26 @@
+#pragma once
+#include <string>
+
+namespace wg {
+
+/// Configuration loaded from relay.conf.
+struct RelayConf {
+    std::string server_address;    ///< WireGuard endpoint, e.g. "relay.wilddragon.net"
+    int         server_port = 51820; ///< WireGuard UDP port
+    std::string private_key;       ///< Base64 WireGuard private key for this host
+    std::string server_public_key; ///< Base64 WireGuard public key of the relay server
+    std::string relay_token;       ///< Bearer token for DragonRelay HTTP API auth
+    std::string relay_host;        ///< HTTP base URL, e.g. "https://relay.wilddragon.net"
+    int         relay_port = 443;  ///< DragonRelay HTTP API port
+};
+
+/// Parse relay.conf from the given file path.
+/// Returns true on success; populates errOut on failure.
+bool parseRelayConf(const std::string &path, RelayConf &conf, std::string &errOut);
+
+/// Returns the default relay.conf path:
+///   Windows: %PROGRAMDATA%\Artemis\relay.conf
+///   Linux/macOS: /etc/artemis/relay.conf
+std::string defaultRelayConfPath();
+
+} // namespace wg