switch to http mcp

mcp/config.ts

@@ -2,48 +2,18 @@
  * Simple MCP configuration helper for adding our minimal GitHub comment server
  */
 
-import type { McpStdioServerConfig } from "@anthropic-ai/claude-agent-sdk";
-import { fromHere } from "@ark/fs";
-import type { Payload } from "../external.ts";
+import type { McpHttpServerConfig } from "@anthropic-ai/claude-agent-sdk";
 import { ghPullfrogMcpName } from "../external.ts";
-import type { Mode } from "../modes.ts";
-import { parseRepoContext } from "../utils/github.ts";
 
 export type McpName = typeof ghPullfrogMcpName;
 
-export type McpConfigs = Record<McpName, McpStdioServerConfig>;
-
-export function createMcpConfigs(
-  githubInstallationToken: string,
-  modes: Mode[],
-  payload: Payload
-): McpConfigs {
-  const repoContext = parseRepoContext();
-  const githubRepository = `${repoContext.owner}/${repoContext.name}`;
-
-  // In production (GitHub Actions), mcp-server is in same directory as entry.js (where this is bundled)
-  // In development, server.ts is in the same directory as this file (config.ts)
-  const serverPath = process.env.GITHUB_ACTIONS ? fromHere("mcp-server") : fromHere("server.ts");
-
-  const env: Record<string, string> = {
-    GITHUB_INSTALLATION_TOKEN: githubInstallationToken,
-    GITHUB_REPOSITORY: githubRepository,
-    PULLFROG_MODES: JSON.stringify(modes),
-    PULLFROG_PAYLOAD: JSON.stringify(payload),
-    PULLFROG_TEMP_DIR: process.env.PULLFROG_TEMP_DIR!,
-  };
-
-  // pass through GITHUB_RUN_ID if available (automatically set in GitHub Actions)
-  // this is used to build the "View workflow run" link in comments
-  if (process.env.GITHUB_RUN_ID) {
-    env.GITHUB_RUN_ID = process.env.GITHUB_RUN_ID;
-  }
+export type McpConfigs = Record<McpName, McpHttpServerConfig>;
 
+export function createMcpConfigs(mcpServerUrl: string): McpConfigs {
   return {
     [ghPullfrogMcpName]: {
-      command: "node",
-      args: [serverPath],
-      env,
+      type: "http",
+      url: mcpServerUrl,
     },
   };
 }

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();
+    },
+  };
+}