diff --git a/vibe-check-runner.js b/vibe-check-runner.js
index f56ee94..be5f3ac 100644
--- a/vibe-check-runner.js
+++ b/vibe-check-runner.js
@@ -2,6 +2,7 @@ import { Project, SyntaxKind } from 'ts-morph';
 import fs from 'node:fs';
 import fsPromises from 'node:fs/promises';
 import path from 'node:path';
+import { pathToFileURL } from 'node:url';
 import { execFileSync } from 'node:child_process';
 import { GoogleGenAI } from '@google/genai';
 
@@ -9,7 +10,7 @@ const ai = new GoogleGenAI({ apiKey: process.env.GOOGLE_AI_API_KEY });
 
 // Constants for scoring
 
-async function fileOrDirExists(filePath) {
+export async function fileOrDirExists(filePath) {
   try {
     await fsPromises.stat(filePath);
     return true;
@@ -25,7 +26,7 @@ const SCORES = {
   EFFICIENCY: 10,
 };
 
-function getModifiedFiles() {
+export function getModifiedFiles() {
   try {
     // In CI (daily run), check files modified in the last 24 hours.
     // We filter for non-empty lines that end in .md and are in frontend/ or backend/
@@ -43,7 +44,7 @@ function getModifiedFiles() {
   }
 }
 
-async function syncBenchmarks(tech, mdContent, retries = 5, delay = 10000) {
+export async function syncBenchmarks(tech, mdContent, retries = 5, delay = 10000) {
   try {
     const prompt = `Based on the following documentation:\n\n${mdContent}\n\n1. Generate a "Golden Prompt" (a comprehensive instruction for generating a typical module using this technology) in JSON format: {"golden_prompt": "...", "tech": "${tech}"}\n2. Generate a JSON Schema for TS-Morph AST validation rules enforcing DDD/FSD layers and strict typing for this technology. The generated JSON schema must explicitly follow a nested structure compatible with \`analyzeAST\`. Format: {"$schema": "...", "type": "object", "properties": {"forbidden_types": {"contains": {"enum": ["any"]}}}}.\n\nRespond strictly with ONLY a JSON array containing these two objects in order. No markdown wrappers.`;
     const response = await ai.models.generateContent({
@@ -85,7 +86,7 @@ async function syncBenchmarks(tech, mdContent, retries = 5, delay = 10000) {
   }
 }
 
-async function simulateAIGeneration(goldenPrompt, tech, mdContent, retries = 5, delay = 10000) {
+export async function simulateAIGeneration(goldenPrompt, tech, mdContent, retries = 5, delay = 10000) {
   try {
     const prompt = `${goldenPrompt}\n\nConstraints and instructions from the following documentation:\n\n${mdContent}\n\nGenerate ONLY raw code. No markdown formatting, no explanations.`;
     const response = await ai.models.generateContent({
@@ -110,7 +111,7 @@ async function simulateAIGeneration(goldenPrompt, tech, mdContent, retries = 5,
   }
 }
 
-function analyzeAST(sourceFile, tech) {
+export function analyzeAST(sourceFile, tech) {
   let score = {
     arch: SCORES.ARCH,
     type: SCORES.TYPE,
@@ -222,7 +223,7 @@ function analyzeAST(sourceFile, tech) {
   return { total, breakdown: score };
 }
 
-async function runVibeCheck() {
+export async function runVibeCheck() {
   console.log('Running Vibe-Check Runner...');
 
   const modifiedFiles = getModifiedFiles();
@@ -231,19 +232,9 @@ async function runVibeCheck() {
     return;
   }
 
-  const project = new Project();
-
-  // Configure git user for commits
-  try {
-    execFileSync('git', ['config', '--global', 'user.name', 'github-actions[bot]']);
-    execFileSync('git', ['config', '--global', 'user.email', 'github-actions[bot]@users.noreply.github.com']);
-  } catch (e) {
-    console.warn('Failed to configure git user. If running locally, this is expected.');
-  }
-
+  // Group files by tech
+  const filesByTech = {};
   for (const file of modifiedFiles) {
-    console.log(`Processing ${file}...`);
-
     if (!fs.existsSync(file)) {
       console.log(`File ${file} does not exist. Skipping.`);
       continue;
@@ -265,27 +256,77 @@ async function runVibeCheck() {
       }
     }
 
-    const mdContent = await fsPromises.readFile(file, 'utf-8');
+    if (!filesByTech[tech]) filesByTech[tech] = [];
+    filesByTech[tech].push(file);
+  }
+
+  // 1. Sequential syncBenchmarks
+  for (const tech in filesByTech) {
+    console.log(`Syncing benchmarks for ${tech}...`);
+    const mdContents = [];
+    for (const file of filesByTech[tech]) {
+      const content = await fsPromises.readFile(file, 'utf-8');
+      mdContents.push(content);
+    }
+    const combinedContent = mdContents.join('\n\n--- \n\n');
+    await syncBenchmarks(tech, combinedContent);
+  }
 
-    await syncBenchmarks(tech, mdContent);
+  // 2. Concurrent simulateAIGeneration and analyzeAST
+  console.log('Running AI generation and AST analysis concurrently...');
+  const analysisResults = [];
+  const promises = [];
 
+  for (const tech in filesByTech) {
     const suitePath = path.join('benchmarks', 'suites', `${tech}.json`);
-    if (!fs.existsSync(suitePath)) {
-      console.log(`No benchmark suite found for ${tech}. Skipping.`);
-      continue;
+    let suiteConfig = null;
+    if (fs.existsSync(suitePath)) {
+       suiteConfig = JSON.parse(await fsPromises.readFile(suitePath, 'utf-8'));
+    } else {
+       console.log(`No benchmark suite found for ${tech}. Skipping AI gen.`);
     }
 
-    const suiteConfig = JSON.parse(await fsPromises.readFile(suitePath, 'utf-8'));
+    for (const file of filesByTech[tech]) {
+      if (!suiteConfig) continue;
 
-    const generatedCode = await simulateAIGeneration(suiteConfig.golden_prompt, tech, mdContent);
+      const p = (async () => {
+         const mdContent = await fsPromises.readFile(file, 'utf-8');
+         const generatedCode = await simulateAIGeneration(suiteConfig.golden_prompt, tech, mdContent);
 
-    if (!generatedCode) {
-      console.error(`Failed to generate code for ${tech}.`);
-      continue;
+         if (!generatedCode) {
+            console.error(`Failed to generate code for ${tech} (${file}).`);
+            return null;
+         }
+
+         const project = new Project();
+         const tempFile = `temp_${tech}_${Math.random().toString(36).substring(7)}.ts`;
+         const sourceFile = project.createSourceFile(tempFile, generatedCode, { overwrite: true });
+         const { total: score, breakdown } = analyzeAST(sourceFile, tech);
+
+         return { file, tech, score, breakdown, generatedCode };
+      })();
+      promises.push(p);
     }
+  }
+
+  const results = await Promise.all(promises);
+  results.forEach(r => {
+    if (r) analysisResults.push(r);
+  });
+
+  // 3. Sequential side effects (Git, file updates, GH CLI)
+  // Configure git user for commits
+  try {
+    execFileSync('git', ['config', '--global', 'user.name', 'github-actions[bot]']);
+    execFileSync('git', ['config', '--global', 'user.email', 'github-actions[bot]@users.noreply.github.com']);
+  } catch (e) {
+    console.warn('Failed to configure git user. If running locally, this is expected.');
+  }
 
-    const sourceFile = project.createSourceFile(`temp_${tech}.ts`, generatedCode, { overwrite: true });
-    const { total: score, breakdown } = analyzeAST(sourceFile, tech);
+  let failedFiles = false;
+
+  for (const result of analysisResults) {
+    const { file, tech, score, breakdown, generatedCode } = result;
 
     console.log(`Fidelity Score for ${file}: ${score}%`);
     console.log(`Breakdown:`, breakdown);
@@ -316,6 +357,7 @@ async function runVibeCheck() {
 
     } else {
       console.error(`❌ Validation failed for ${file}. Score below 95%.`);
+      failedFiles = true;
 
       const reportDir = path.join('benchmarks', 'logs');
       if (!await fileOrDirExists(reportDir)) await fsPromises.mkdir(reportDir, { recursive: true });
@@ -332,10 +374,14 @@ async function runVibeCheck() {
       } catch (err) {
         console.error('Failed to create GitHub Issue (gh cli might not be installed or authenticated):', err.message);
       }
-
-      process.exitCode = 1;
     }
   }
+
+  if (failedFiles) {
+     process.exitCode = 1;
+  }
 }
 
-runVibeCheck().catch(console.error);
\ No newline at end of file
+if (import.meta.url === pathToFileURL(process.argv[1]).href) {
+  runVibeCheck().catch(console.error);
+}
\ No newline at end of file