Add retry logic for command execution in Build function

cli/build.ps1

@@ -236,5 +236,9 @@ foreach ($PLATFORM in $PLATFORMS) {
     }
 }
 
+# Kill extension processes again right before azd x build copies to ~/.azd/extensions/
+# This prevents "file in use" errors during the install step
+Stop-ExtensionProcesses
+
 Write-Host "`n✓ Build completed successfully!" -ForegroundColor Green
 Write-Host "  Binaries are located in the $OUTPUT_DIR directory." -ForegroundColor Gray

cli/build.sh

@@ -200,6 +200,10 @@ for PLATFORM in "${PLATFORMS[@]}"; do
     fi
 done
 
+# Kill extension processes again right before azd x build copies to ~/.azd/extensions/
+# This prevents "file in use" errors during the install step
+stop_extension_processes
+
 echo ""
 echo "✓ Build completed successfully!"
 echo "  Binaries are located in the $OUTPUT_DIR directory."

cli/magefile.go

@@ -104,6 +104,7 @@ func All() error {
 func Build() error {
 	// Kill any running app processes first to avoid "file in use" errors on Windows
 	_ = killAppProcesses()
+	time.Sleep(500 * time.Millisecond)
 
 	mg.Deps(DashboardBuild)
 
@@ -129,7 +130,7 @@ func Build() error {
 	}
 
 	// Build and install directly using azd x build
-	if err := sh.RunWithV(env, "azd", "x", "build"); err != nil {
+	if err := runWithEnvRetry(env, "azd", "x", "build"); err != nil {
 		return fmt.Errorf(errBuildFailedFmt, err)
 	}
 
@@ -138,6 +139,23 @@ func Build() error {
 	return nil
 }
 
+// runWithEnvRetry runs a command with environment variables, retrying up to 3 times on failure.
+func runWithEnvRetry(env map[string]string, cmd string, args ...string) error {
+	const maxRetries = 3
+	var err error
+	for i := 0; i < maxRetries; i++ {
+		if i > 0 {
+			delay := time.Duration(i*5) * time.Second
+			fmt.Printf("  ⚠️  Attempt %d/%d failed, retrying in %s...\n", i, maxRetries, delay)
+			time.Sleep(delay)
+		}
+		if err = sh.RunWithV(env, cmd, args...); err == nil {
+			return nil
+		}
+	}
+	return err
+}
+
 // buildAllPlatforms compiles the CLI binary for all platforms (used for releases).
 func buildAllPlatforms() error {
 	fmt.Println("Building CLI for all platforms...")