```typescript
import fs from "fs";
import path from "path";

const dbPath = path.resolve("src/storage/projects.json");

export type ProjectDB = { projects: { id: string; name: string; createdAt: number }[] };

export function readProjects(): ProjectDB {
  if (!fs.existsSync(dbPath)) return { projects: [] };
  return JSON.parse(fs.readFileSync(dbPath, "utf-8"));
}

export function writeProjects(db: ProjectDB) {
  fs.writeFileSync(dbPath, JSON.stringify(db, null, 2), "utf-8");
}
```