I have been wanting to build something with AI from scratch but never found a good idea. I love word games like Wordle and Spelling Bee so I used Gemini to filter through some ideas for word games. After I had three ideas I took them to family and friends and asked which one I should build. My daughter really liked the Letter Lockbox idea so I started there. Cole Medin has a great video on YouTube on how to use AI for iterative development [https://www.youtube.com/watch?v=SS5DYx6mPw8&t=395s] and I used his method to create a PLANNING.md and a TASK.md file. This was a blast to make and it is live! Enjoy!
Show HN: Letter Lockbox – A word game I built over the weekend with Claude Code
letterlockbox.com