test(create-objectstack): the skills-single-copy scaffold pin reads the exact @objectstack/spec version

Claude-Session: https://claude.ai/code/session_01CxBKycaiUpA1yGx1XyoGqX
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

packages/create-objectstack/src/scaffold-skills-single-copy.test.ts

@@ -360,10 +360,11 @@ describe('a scaffolded project installs the package catalog, once', () => {
     ]);
   });
 
-  it("depends on @objectstack/skills at @objectstack/spec's range", () => {
+  it("depends on @objectstack/skills at @objectstack/spec's exact version", () => {
     const pkg = JSON.parse(fs.readFileSync(path.join(run.project, 'package.json'), 'utf8'));
     const spec = pkg.dependencies?.['@objectstack/spec'];
-    expect(spec).toMatch(/^\^\d+\./);
+    // An exact version, no `^`/`~`: the docs prescribe exact pins on the v18 line.
+    expect(spec).toMatch(/^\d+\.\d+\.\d+/);
     expect(pkg.devDependencies?.[SKILLS_PACKAGE]).toBe(spec);
   });