release: 0.1.6 — relay notifications/progress to MCP client

Long-running upstream skills emit MCP notifications/progress on the SSE
stream. Without forwarding, the gateway swallows them and the MCP
client (Claude Code, Cursor) aborts the tools/call on its idle timer
after ~60s — even though the HTTP stream stays warm.

Gateway now passes the SDK's extra.sendNotification through to
UpstreamAgent.callTool. Any non-response frame with a method but no id
becomes a notification on the client side. Each tools/call carries a
progressToken (client-supplied or request-id fallback) so the client
can correlate.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/gateway.ts

@@ -95,7 +95,7 @@ export async function buildGateway(opts: GatewayOptions = {}): Promise<GatewayHa
     return { tools };
   });
 
-  server.setRequestHandler(CallToolRequestSchema, async (req) => {
+  server.setRequestHandler(CallToolRequestSchema, async (req, extra) => {
     const fullName = req.params.name;
     const idx = fullName.indexOf(SEP);
     if (idx < 0) {
@@ -107,10 +107,30 @@ export async function buildGateway(opts: GatewayOptions = {}): Promise<GatewayHa
     if (!upstream) {
       return _softError(`unknown agent: ${agentName}`) as any;
     }
+    // Honor the client's progressToken if it supplied one; else fall
+    // back to the request id. Either way, when upstream emits
+    // notifications/progress we forward them via the SDK's
+    // sendNotification so clients like Claude Code reset their idle
+    // tool-call timer and don't abort long builds.
+    const clientToken = (req.params._meta as any)?.progressToken as
+      | string
+      | number
+      | undefined;
+    const progressToken = clientToken ?? (extra.requestId as string | number);
     try {
       const result = await upstream.callTool(
         toolName,
         (req.params.arguments as Record<string, unknown>) ?? {},
+        {
+          progressToken,
+          onNotification: async (notif) => {
+            try {
+              await extra.sendNotification(notif as any);
+            } catch {
+              // best effort
+            }
+          },
+        },
       );
       // Pass through the upstream's CallToolResult as-is. Upstreams already
       // populate content / structuredContent / isError per the MCP spec.