fix(cli): precompute bare root help startup path

src/cli/program/root-help.ts

@@ -23,7 +23,23 @@ function buildRootHelpProgram(): Command {
   return program;
 }
 
-export function outputRootHelp(): void {
+export function renderRootHelpText(): string {
   const program = buildRootHelpProgram();
-  program.outputHelp();
+  let output = "";
+  const originalWrite = process.stdout.write.bind(process.stdout);
+  const captureWrite: typeof process.stdout.write = ((chunk: string | Uint8Array) => {
+    output += String(chunk);
+    return true;
+  }) as typeof process.stdout.write;
+  process.stdout.write = captureWrite;
+  try {
+    program.outputHelp();
+  } finally {
+    process.stdout.write = originalWrite;
+  }
+  return output;
+}
+
+export function outputRootHelp(): void {
+  process.stdout.write(renderRootHelpText());
 }