embarrassing

mcp/config.ts

@@ -0,0 +1,24 @@
+/**
+ * Simple MCP configuration helper for adding our minimal GitHub comment server
+ */
+const actionPath = process.env.GITHUB_ACTION_PATH || process.cwd();
+
+export function createMcpConfig(githubToken: string, repoOwner: string, repoName: string) {
+  return JSON.stringify(
+    {
+      mcpServers: {
+        minimal_github_comment: {
+          command: "node",
+          args: [`${actionPath}/mcp/server.ts`],
+          env: {
+            GITHUB_TOKEN: githubToken,
+            REPO_OWNER: repoOwner,
+            REPO_NAME: repoName,
+          },
+        },
+      },
+    },
+    null,
+    2
+  );
+}

mcp/server.ts

@@ -0,0 +1,101 @@
+#!/usr/bin/env node
+// Minimal GitHub Issue Comment MCP Server
+import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
+import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
+import { Octokit } from "@octokit/rest";
+import { type } from "arktype";
+
+// Get repository information from environment variables
+const REPO_OWNER = process.env.REPO_OWNER;
+const REPO_NAME = process.env.REPO_NAME;
+
+if (!REPO_OWNER || !REPO_NAME) {
+  console.error("Error: REPO_OWNER and REPO_NAME environment variables are required");
+  process.exit(1);
+}
+
+const server = new McpServer({
+  name: "Minimal GitHub Issue Comment Server",
+  version: "0.0.1",
+});
+
+// Define the schema for creating issue comments
+const Comment = type({
+  issueNumber: type.number.describe("the issue number to comment on"),
+  body: type.string.describe("the comment body content"),
+});
+
+function annotations(t: type<Record<string, unknown>>): Record<string, unknown> {
+  return Object.fromEntries(t.props.map((prop) => [prop.key, prop.value.toJsonSchema()]));
+}
+
+server.tool(
+  "create_issue_comment",
+  "Create a comment on a GitHub issue",
+  annotations(Comment),
+  async ({ issueNumber, body }) => {
+    try {
+      // Validate input using arktype
+      const validation = Comment({ issueNumber, body });
+      if (validation instanceof type.errors) {
+        throw new Error(`Invalid input: ${validation.summary}`);
+      }
+
+      const githubToken = process.env.GITHUB_TOKEN;
+      if (!githubToken) {
+        throw new Error("GITHUB_TOKEN environment variable is required");
+      }
+
+      const octokit = new Octokit({
+        auth: githubToken,
+      });
+
+      const result = await octokit.rest.issues.createComment({
+        owner: REPO_OWNER,
+        repo: REPO_NAME,
+        issue_number: issueNumber,
+        body: body,
+      });
+
+      return {
+        content: [
+          {
+            type: "text",
+            text: JSON.stringify(
+              {
+                success: true,
+                commentId: result.data.id,
+                url: result.data.html_url,
+                body: result.data.body,
+              },
+              null,
+              2
+            ),
+          },
+        ],
+      };
+    } catch (error) {
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      return {
+        content: [
+          {
+            type: "text",
+            text: `Error creating comment: ${errorMessage}`,
+          },
+        ],
+        error: errorMessage,
+        isError: true,
+      };
+    }
+  }
+);
+
+async function runServer() {
+  const transport = new StdioServerTransport();
+  await server.connect(transport);
+  process.on("exit", () => {
+    server.close();
+  });
+}
+
+runServer().catch(console.error);