switch to http mcp

mcp/server.ts

@@ -1,5 +1,6 @@
 import "./arkConfig.ts";
 // this must be imported first
+import { createServer } from "node:net";
 import { FastMCP } from "fastmcp";
 import { ghPullfrogMcpName } from "../external.ts";
 import { GetCheckSuiteLogsTool } from "./checkSuite.ts";
@@ -18,25 +19,79 @@ import { GetReviewCommentsTool, ListPullRequestReviewsTool } from "./reviewComme
 import { SelectModeTool } from "./selectMode.ts";
 import { addTools } from "./shared.ts";
 
-const server = new FastMCP({
-  name: ghPullfrogMcpName,
-  version: "0.0.1",
-});
+/**
+ * Find an available port starting from the given port
+ */
+async function findAvailablePort(startPort: number): Promise<number> {
+  const checkPort = (port: number): Promise<boolean> => {
+    return new Promise((resolve) => {
+      const server = createServer();
+      server.once("error", () => {
+        server.close();
+        resolve(false);
+      });
+      server.listen(port, () => {
+        server.close(() => {
+          resolve(true);
+        });
+      });
+    });
+  };
 
-addTools(server, [
-  SelectModeTool,
-  CreateCommentTool,
-  EditCommentTool,
-  CreateWorkingCommentTool,
-  UpdateWorkingCommentTool,
-  IssueTool,
-  PullRequestTool,
-  ReviewTool,
-  PullRequestInfoTool,
-  GetReviewCommentsTool,
-  ListPullRequestReviewsTool,
-  GetCheckSuiteLogsTool,
-  DebugShellCommandTool,
-]);
+  let port = startPort;
+  while (port < startPort + 100) {
+    if (await checkPort(port)) {
+      return port;
+    }
+    port++;
+  }
+  throw new Error(`Could not find available port starting from ${startPort}`);
+}
 
-server.start();
+/**
+ * Start the MCP HTTP server and return the URL and close function
+ */
+export async function startMcpHttpServer(): Promise<{ url: string; close: () => Promise<void> }> {
+  const server = new FastMCP({
+    name: ghPullfrogMcpName,
+    version: "0.0.1",
+  });
+
+  addTools(server, [
+    SelectModeTool,
+    CreateCommentTool,
+    EditCommentTool,
+    CreateWorkingCommentTool,
+    UpdateWorkingCommentTool,
+    IssueTool,
+    PullRequestTool,
+    ReviewTool,
+    PullRequestInfoTool,
+    GetReviewCommentsTool,
+    ListPullRequestReviewsTool,
+    GetCheckSuiteLogsTool,
+    DebugShellCommandTool,
+  ]);
+
+  const port = await findAvailablePort(3764);
+  const host = "127.0.0.1";
+  const endpoint = "/mcp";
+
+  await server.start({
+    transportType: "httpStream",
+    httpStream: {
+      port,
+      host,
+      endpoint,
+    },
+  });
+
+  const url = `http://${host}:${port}${endpoint}`;
+
+  return {
+    url,
+    close: async () => {
+      await server.stop();
+    },
+  };
+}