fix: consolidate bash hooks to avoid fork storms

scripts/hooks/pre-bash-dispatcher.js

@@ -0,0 +1,24 @@
+#!/usr/bin/env node
+'use strict';
+
+const { runPreBash } = require('./bash-hook-dispatcher');
+
+let raw = '';
+const MAX_STDIN = 1024 * 1024;
+
+process.stdin.setEncoding('utf8');
+process.stdin.on('data', chunk => {
+  if (raw.length < MAX_STDIN) {
+    const remaining = MAX_STDIN - raw.length;
+    raw += chunk.substring(0, remaining);
+  }
+});
+
+process.stdin.on('end', () => {
+  const result = runPreBash(raw);
+  if (result.stderr) {
+    process.stderr.write(result.stderr);
+  }
+  process.stdout.write(result.output);
+  process.exit(result.exitCode);
+});