Remove legacy orchestration and MCP aliases; reroute recursive pipeline API

tests/mcp-converters.test.ts

@@ -43,40 +43,35 @@ test("maps shared headers to codex http_headers", () => {
   });
 });
 
-test("normalizes header aliases into a single headers object", () => {
+test("normalizes headers into a single headers object", () => {
   const normalized = normalizeSharedMcpServer({
     url: "http://localhost:3000/mcp",
-    http_headers: {
-      "X-Source": "legacy",
-    },
     headers: {
       Authorization: "Bearer token",
     },
   });
 
   assert.deepEqual(normalized.headers, {
-    "X-Source": "legacy",
     Authorization: "Bearer token",
   });
-  assert.equal("http_headers" in normalized, false);
 });
 
-test("maps legacy http_headers alias for claude conversion", () => {
-  const claudeConfig = toClaudeServerConfig("legacy-http-headers", {
-    type: "http",
-    url: "http://localhost:3000/mcp",
-    http_headers: {
-      Authorization: "Bearer token",
-    },
-  });
-
-  assert.deepEqual(claudeConfig, {
-    type: "http",
-    url: "http://localhost:3000/mcp",
-    headers: {
-      Authorization: "Bearer token",
-    },
-  });
+test("rejects legacy shared MCP header alias http_headers", () => {
+  assert.throws(
+    () =>
+      parseMcpConfig({
+        servers: {
+          legacy: {
+            type: "http",
+            url: "http://localhost:3000/mcp",
+            http_headers: {
+              Authorization: "Bearer token",
+            },
+          },
+        },
+      }),
+    /unrecognized key/i,
+  );
 });
 
 test("throws for claude http server without url", () => {