build: enforce changelog workflow in CI

src/ci-workflow.test.ts

@@ -0,0 +1,16 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+
+const ciWorkflowPath = resolve(__dirname, '../.github/workflows/ci.yml');
+const ciWorkflow = readFileSync(ciWorkflowPath, 'utf8');
+
+test('ci workflow lints changelog fragments', () => {
+  assert.match(ciWorkflow, /bun run changelog:lint/);
+});
+
+test('ci workflow checks pull requests for required changelog fragments', () => {
+  assert.match(ciWorkflow, /bun run changelog:pr-check/);
+  assert.match(ciWorkflow, /skip-changelog/);
+});