feat: add custom runtime type with command and args fields

- Add 'custom' as valid runtime type
- Add required command and args fields for custom runtime
- Update validation in pr-check.js
- Add custom runtime support in ConfigManager
- Update type definitions and interfaces

Co-Authored-By: Michael Latman <[email protected]>

src/scripts/pr-check.js

@@ -12,7 +12,7 @@ const octokit = new Octokit({
 });
 
 const REQUIRED_FIELDS = ['name', 'description', 'vendor', 'sourceUrl', 'homepage', 'license', 'runtime'];
-const VALID_RUNTIMES = ['node', 'python'];
+const VALID_RUNTIMES = ['node', 'python', 'custom'];
 
 async function validatePackages() {
   const packageListPath = path.join(__dirname, '../../packages/package-list.json');
@@ -110,6 +110,10 @@ export function validateRuntime(pkg) {
   if (!VALID_RUNTIMES.includes(pkg.runtime)) {
     throw new Error(`Package ${pkg.name} has invalid runtime: ${pkg.runtime}. Must be one of: ${VALID_RUNTIMES.join(', ')}`);
   }
+
+  if (pkg.runtime === 'custom' && (!pkg.command || !pkg.args)) {
+    throw new Error(`Package ${pkg.name} with custom runtime must include both 'command' and 'args' fields`);
+  }
 }
 
 async function validatePackagePublication(pkg) {

src/types/package.ts

@@ -1,11 +1,13 @@
 export interface Package {
     name: string;
     description: string;
-    runtime: 'node' | 'python';
+    runtime: 'node' | 'python' | 'custom';
     vendor: string;
     sourceUrl: string;
     homepage: string;
     license: string;
+    command?: string;  // Required when runtime is 'custom'
+    args?: string[];   // Required when runtime is 'custom'
 }
 
 export interface ResolvedPackage extends Package {

src/utils/config-manager.ts

@@ -4,7 +4,7 @@ import os from 'os';
 import { Package } from '../types/package.js';
 
 export interface MCPServer {
-    runtime: 'node' | 'python';
+    runtime: 'node' | 'python' | 'custom';
     command?: string;
     args?: string[];
     env?: Record<string, string>;
@@ -119,6 +119,12 @@ export class ConfigManager {
         } else if (pkg.runtime === 'python') {
             serverConfig.command = 'uvx';
             serverConfig.args = [pkg.name];
+        } else if (pkg.runtime === 'custom') {
+            if (!pkg.command || !pkg.args) {
+                throw new Error('Custom runtime requires both command and args fields');
+            }
+            serverConfig.command = pkg.command;
+            serverConfig.args = pkg.args;
         }
 
         config.mcpServers[serverName] = serverConfig;