Refactor publish script to check for existing npm version before publishing, and update package.json script name for clarity. Update README to reflect new script name.

Author: claudio-silva

npx/README.md

@@ -120,7 +120,7 @@ npm run publish:npx
 **From npx directory:**
 ```bash
 cd npx
-npm run publish
+npm run publish:package
 ```
 
 Or run directly:

npx/package.json

@@ -1,14 +1,14 @@
 {
   "name": "run-claude-artifact",
-  "version": "2.2.0",
+  "version": "2.2.1",
   "description": "Run Claude AI Artifacts locally - quick preview, or create projects, build, deploy, and push to a Git repository.",
   "bin": {
     "run-claude-artifact": "./run-claude-artifact.js"
   },
   "scripts": {
     "build": "echo \"nothing to build\"",
     "test": "node run-claude-artifact.js --help",
-    "publish": "node publish.js"
+    "publish:package": "node publish.js"
   },
   "author": "Cláudio Silva",
   "license": "MIT",

npx/publish.js

@@ -116,10 +116,32 @@ async function main() {
       }
     }
 
-    // Step 6: Run npm publish
+    // Step 6: Check if version already exists on npm
+    console.log('\n🔍 Checking if version already exists on npm...');
+    try {
+      const npmViewOutput = execSync(`npm view ${require('./package.json').name}@${newVersion} version`, { 
+        encoding: 'utf8', 
+        stdio: 'pipe',
+        cwd: __dirname 
+      });
+      if (npmViewOutput.trim() === newVersion) {
+        console.log(`⚠️  Version ${newVersion} already exists on npm.`);
+        const continueAnswer = await question('Do you want to publish anyway? (y/n): ');
+        if (continueAnswer.toLowerCase() !== 'y' && continueAnswer.toLowerCase() !== 'yes') {
+          console.log('❌ Publishing cancelled.');
+          process.exit(0);
+        }
+      }
+    } catch (err) {
+      // Version doesn't exist, which is fine - we can proceed
+      console.log(`✅ Version ${newVersion} is available for publishing.`);
+    }
+
+    // Step 7: Run npm publish
     console.log('\n🚀 Publishing to npm...');
     process.chdir(__dirname);
-    execSync('npm publish --access public', { stdio: 'inherit' });
+    // Use --ignore-scripts to prevent npm from running lifecycle hooks that might cause loops
+    execSync('npm publish --access public --ignore-scripts', { stdio: 'inherit' });
     console.log('\n✅ Published successfully!');
 
   } catch (error) {