docs(ci): finalize global install runtime docs and smoke coverage

tests/docs/installer-quickstart-contract.test.ts

@@ -0,0 +1,21 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import fs from 'node:fs/promises';
+import path from 'node:path';
+
+const readmePath = path.resolve('README.md');
+
+test('README documents installer one-liners for windows and posix', async () => {
+  const raw = await fs.readFile(readmePath, 'utf8');
+  assert.match(raw, /npm i -g beadboard/i);
+  assert.match(raw, /install\/install\.sh/i);
+  assert.match(raw, /install[\\/]+install\.ps1/i);
+  assert.match(raw, /~\/\.beadboard\/runtime/i);
+});
+
+test('README documents beadboard launcher commands', async () => {
+  const raw = await fs.readFile(readmePath, 'utf8');
+  assert.match(raw, /\bbeadboard start\b/i);
+  assert.match(raw, /\bbeadboard open\b/i);
+  assert.match(raw, /\bbeadboard status\b/i);
+});