refactor: remove ClayTube project from showcase and related documentation

.replworks/ARCHITECTURE.md

@@ -297,8 +297,6 @@ ai-issue
 
 Wifi Note
 
-ClayTube
-
 ETERNOps
 
 ETERN Labs

.replworks/PRODUCT_SPEC.md

@@ -478,17 +478,10 @@ Initial Entries
 
 ```text
 REPL Works Website
-
 ai-issue
-
 Wifi Note
-
-ClayTube
-
 ETERNOps
-
 ETERN Labs
-
 MMA
 ```
 
@@ -539,19 +532,17 @@ Featured flag
 Sort order
 ```
 
-The homepage displays the four featured projects:
+The homepage displays these featured projects:
 
 ```text
 REPL Works Website
 
 ai-issue
 
-ClayTube
-
 Wifi Note
 ```
 
-The Showcase page displays all seven projects. It shows the Lessons Learned
+The Showcase page displays all projects. It shows the Lessons Learned
 summary on cards; the homepage may omit that field.
 
 ---

src/data/showcase.ts

@@ -65,20 +65,6 @@ export const showcaseProjects: ShowcaseProject[] = [
     featured: true,
     order: 4,
   },
-  {
-    slug: 'claytube',
-    name: '클래이튜브 (ClayTube)',
-    description:
-      '장기간에 걸쳐 지속 확장되는 서비스에서 AI 모델 변경에도 견디는 프로젝트 연속성을 증명하는 REPL Works 호환 프로젝트',
-    tags: ['Tooling', 'CLI'],
-    lesson:
-      '장기 연속성은 내구성 있는 기억을 필요로 합니다: 수개월 동안 세션이 바뀌더라도 Git 문서가 있으면 맥락 유실이 없습니다.',
-    detailUrl: '/showcase/claytube/',
-    website: 'https://www.palgle.com/claytube/',
-    github: 'https://github.com/eternops/claytube',
-    featured: true,
-    order: 5,
-  },
   {
     slug: 'eternops',
     name: '이터놉스 (ETERNOps)',

src/site-invariants.test.ts

@@ -67,7 +67,7 @@ describe('REPL Works content invariants', () => {
     const showcaseDirectory = resolve(root, 'src/content/showcase');
     for (const entry of [
       'ai-issue.mdx',
-      'claytube.mdx',
+      'coolrestore.mdx',
       'etern-labs.mdx',
       'eternops.mdx',
       'mma.mdx',
@@ -76,15 +76,16 @@ describe('REPL Works content invariants', () => {
     ]) {
       expect(existsSync(resolve(showcaseDirectory, entry))).toBe(true);
     }
+    expect(existsSync(resolve(showcaseDirectory, 'claytube.mdx'))).toBe(false);
   });
 
   it('keeps the shared showcase data complete for home and Showcase', () => {
-    expect(showcaseProjects).toHaveLength(8);
+    expect(showcaseProjects).toHaveLength(7);
     expect(new Set(showcaseProjects.map((project) => project.slug)).size).toBe(
-      8,
+      7,
     );
     expect(showcaseProjects.filter((project) => project.featured)).toHaveLength(
-      5,
+      4,
     );
 
     for (const project of showcaseProjects) {