Escaping the "AI Spaghetti Code" Trap: How I Refactored My Next.js App with spec-kit

Hi Indie Hackers! I’m Xin Wan, a full-stack engineer, and I just launched Printable Handwriting . The journey to get here was a massive learning curve. Back in 2025, I heavily relied on AI coding assistants to build the MVP. The result? It worked visually, but the codebase was an unmaintainable, tangled mess. Adding any new feature felt like walking through a minefield. I recently bit the bullet and did a complete rewrite using Next.js and spec-kit to enforce strict modularity and maintainability. It was painful, but the performance and developer experience are finally where they need to be. With a solid foundation, I’ve finally rolled out the complete toolset I envisioned to help people systematically improve their handwriting aesthetics. The platform now features 5 targeted generators: Lines: For basic pen control and stroke stability. Alphabet: To build a solid foundation with core letters. Print: For clean, highly legible formal writing. Cursive: Designed to improve writing speed a