diff --git a/tools/cli/commands/install.js b/tools/cli/commands/install.js
index d5742cf7..4ada1489 100644
--- a/tools/cli/commands/install.js
+++ b/tools/cli/commands/install.js
@@ -90,10 +90,18 @@ module.exports = {
           // Run AgentVibes installer
           const { execSync } = require('node:child_process');
           try {
+            // Clear ALL npm config env vars to prevent inheritance issues
+            // when BMAD is invoked with --prefix flag
+            // npm sets many npm_config_* and npm_package_* vars that can interfere
+            const cleanEnv = Object.fromEntries(
+              Object.entries(process.env).filter(([key]) => !key.startsWith('npm_config_') && !key.startsWith('npm_package_')),
+            );
+
             execSync('npx agentvibes@latest install', {
               cwd: result.projectDir,
               stdio: 'inherit',
               shell: true,
+              env: cleanEnv,
             });
             console.log(chalk.green('\n✓ AgentVibes installation complete'));
           } catch {
diff --git a/tools/cli/installers/lib/core/installer.js b/tools/cli/installers/lib/core/installer.js
index f113c141..4abe6eb5 100644
--- a/tools/cli/installers/lib/core/installer.js
+++ b/tools/cli/installers/lib/core/installer.js
@@ -824,6 +824,7 @@ If AgentVibes party mode is enabled, immediately trigger TTS with agent's voice:
       const manifestStats = await manifestGen.generateManifests(bmadDir, config.modules || [], this.installedFiles, {
         ides: config.ides || [],
         preservedModules: config._preserveModules || [], // Scan these from installed bmad/ dir
+        agentVibes: { enabled: this.enableAgentVibes || false }, // Track AgentVibes TTS configuration
       });
 
       spinner.succeed(
@@ -1966,6 +1967,37 @@ If AgentVibes party mode is enabled, immediately trigger TTS with agent's voice:
         }
       }
 
+      // Check for AgentVibes TTS - prompt if not previously configured
+      // Read existing manifest to check if AgentVibes was previously set
+      const manifestPath = path.join(bmadDir, '_cfg', 'manifest.yaml');
+      let agentVibesEnabled = false;
+      let agentVibesPreviouslyConfigured = false;
+
+      try {
+        const manifestContent = await fs.readFile(manifestPath, 'utf8');
+        const yaml = require('js-yaml');
+        const manifest = yaml.load(manifestContent);
+        // Check if AgentVibes was previously configured (exists in manifest)
+        if (manifest.agentVibes !== undefined) {
+          agentVibesPreviouslyConfigured = true;
+          agentVibesEnabled = manifest.agentVibes?.enabled || false;
+        }
+      } catch {
+        // Manifest doesn't exist or can't be read - treat as not configured
+      }
+
+      // If AgentVibes wasn't previously configured, prompt the user
+      if (!agentVibesPreviouslyConfigured) {
+        const { UI } = require('../../../lib/ui');
+        const ui = new UI();
+        const agentVibesConfig = await ui.promptAgentVibes(projectDir);
+
+        if (agentVibesConfig.enableTts) {
+          agentVibesEnabled = true;
+          promptedForNewFields = true;
+        }
+      }
+
       if (!promptedForNewFields) {
         console.log(chalk.green('✓ All configuration is up to date, no new options to configure'));
       }
@@ -2003,6 +2035,7 @@ If AgentVibes party mode is enabled, immediately trigger TTS with agent's voice:
         _quickUpdate: true, // Flag to skip certain prompts
         _preserveModules: skippedModules, // Preserve these in manifest even though we didn't update them
         _savedIdeConfigs: savedIdeConfigs, // Pass saved IDE configs to installer
+        enableAgentVibes: agentVibesEnabled, // AgentVibes TTS configuration
       };
 
       // Call the standard install method
diff --git a/tools/cli/installers/lib/core/manifest-generator.js b/tools/cli/installers/lib/core/manifest-generator.js
index f10d0deb..8612a0b4 100644
--- a/tools/cli/installers/lib/core/manifest-generator.js
+++ b/tools/cli/installers/lib/core/manifest-generator.js
@@ -54,6 +54,9 @@ class ManifestGenerator {
     // Filter out any undefined/null values from IDE list
     this.selectedIdes = resolvedIdes.filter((ide) => ide && typeof ide === 'string');
 
+    // Store AgentVibes configuration for manifest
+    this.agentVibes = options.agentVibes || null;
+
     // Collect workflow data
     await this.collectWorkflows(selectedModules);
 
@@ -446,6 +449,7 @@ class ManifestGenerator {
       },
       modules: this.modules,
       ides: this.selectedIdes,
+      agentVibes: this.agentVibes, // Track AgentVibes TTS configuration
     };
 
     const yamlStr = yaml.dump(manifest, {