Initial import from GitHub

cli/scripts/build.mjs

@@ -0,0 +1,32 @@
+#!/usr/bin/env node
+
+import { spawnSync } from 'node:child_process';
+import { existsSync } from 'node:fs';
+import { join } from 'node:path';
+
+const isWindows = process.platform === 'win32';
+const localBin = (name) => join('node_modules', '.bin', isWindows ? `${name}.cmd` : name);
+
+function run(command, args) {
+  const result = spawnSync(command, args, { stdio: 'inherit', shell: false });
+  if (result.error && result.error.code === 'ENOENT') {
+    return { missing: true, status: 127 };
+  }
+  return { missing: false, status: result.status ?? 1 };
+}
+
+const bunResult = run('bun', ['build', 'src/index.ts', '--outdir', 'dist', '--target', 'node']);
+if (!bunResult.missing) {
+  process.exit(bunResult.status);
+}
+
+const tsc = localBin('tsc');
+if (!existsSync(tsc)) {
+  console.error('Build failed: neither bun nor local TypeScript compiler is available.');
+  console.error('Run `npm ci` first, or install Bun from https://bun.sh/docs/installation.');
+  process.exit(127);
+}
+
+console.warn('bun not found; falling back to TypeScript compiler output.');
+const tscResult = run(tsc, []);
+process.exit(tscResult.status);