build: order Host and Client compilation faces

scripts/package-invariants.spec.ts

@@ -72,6 +72,20 @@ describe('package invariant gate', () => {
     expect(collectPackageInvariantViolations(fixture())).toEqual([])
   })
 
+  it('accepts an invariant reference owned by a package-local leaf project', () => {
+    const root = fixture({ invariantReference: false })
+    const dir = join(root, 'packages/core/probe')
+    writeFileSync(join(dir, 'tsconfig.json'), `${JSON.stringify({
+      files: [],
+      references: [{ path: './tsconfig.host.json' }],
+    }, null, 2)}\n`)
+    writeFileSync(join(dir, 'tsconfig.host.json'), `${JSON.stringify({
+      references: [{ path: '../../support/invariants' }],
+    }, null, 2)}\n`)
+
+    expect(collectPackageInvariantViolations(root)).toEqual([])
+  })
+
   it('rejects missing publication metadata and build output', () => {
     const violations = collectPackageInvariantViolations(fixture({
       invariantExport: false,