Remove legacy orchestration and MCP aliases; reroute recursive pipeline API

tests/agent-manager.test.ts

@@ -107,8 +107,7 @@ test("recursive fanout/fan-in avoids deadlock at maxConcurrentAgents=1", async (
   const session = manager.createSession("recursive-deadlock");
 
   const executionOrder: string[] = [];
-  const result = await manager.runRecursiveAgent({
-    sessionId: session.id,
+  const result = await session.runRecursive({
     depth: 0,
     run: async ({ sessionId, intent }) => {
       executionOrder.push(`${sessionId}:${intent?.task ?? "root"}`);
@@ -151,8 +150,7 @@ test("rejects recursive child spawn above depth limit", async () => {
 
   await assert.rejects(
     () =>
-      manager.runRecursiveAgent({
-        sessionId: session.id,
+      session.runRecursive({
         depth: 0,
         run: async ({ depth }) => {
           if (depth < 3) {
@@ -195,8 +193,7 @@ test("closing parent session aborts active recursive work and releases child res
   let abortCount = 0;
   let releaseCount = 0;
 
-  const runPromise = manager.runRecursiveAgent({
-    sessionId: session.id,
+  const runPromise = session.runRecursive({
     depth: 0,
     run: async ({ intent, signal }) => {
       if (!intent) {
@@ -286,8 +283,7 @@ test("recursive children can be isolated via middleware-backed suballocation", a
   const childLeases = new Map<string, Awaited<ReturnType<typeof provisioner.provisionChildSession>>>();
 
   try {
-    await manager.runRecursiveAgent({
-      sessionId: session.id,
+    await session.runRecursive({
       depth: 0,
       run: async ({ intent, sessionId }) => {
         if (!intent) {