Hey everyone, Harun here again. I’m the 12-year-old solo dev from Anthiyur, India, building an AI coding mentor (KODA) entirely on my POCO C55 Android phone.
Yesterday, I posted about getting my first 5 stranger users. But today, I did something every founder needs to do: I went on a Supabase Stakeout.
I opened my chats
table to see what people were actually asking my AI when they thought nobody was watching. And I found a session from a user named Nerando.
I recognized the name. He was a Senior Software Engineer from Atlanta, GA who had given my previous Dev.to post a 🦄 Unicorn reaction. But he didn't just click around my app. He ran a professional, 6-point QA stress test on it.
Here is exactly how a senior engineer interviews a 12-year-old's app:
1. The UI Test
His first message was exactly one of my "Welcome Chips" (clickable starter prompts). He was checking if my UI shortcuts actually triggered the backend correctly. (Pass ✅)
2. The Core Capability Test
He typed: "Can you code". He didn't want a philosophical answer; he wanted to see if my Groq integration actually generated clean, formatted Python scripts with type hinting. (Pass ✅)
3. The Persona Test
He asked: "What are you". A lot of AI apps break character here and say "I am a large language model trained by..." KODA stayed in character and replied: "I’m KODA – your friendly coding mentor." (Pass ✅)
4. The Edge-Case Test
He clicked my 🆘 Panic Button: "I am confused. Explain simply like I am 5." He was testing if the formatting breaks when the prompt forces a sudden tone shift. KODA gave a clean, emoji-filled, simple explanation. (Pass ✅)
5. The Boundary Test
He asked: "Can you browse". This is a classic dev trap. He wanted to see if the AI would hallucinate and lie about having internet access. KODA correctly admitted its limitations. (Pass ✅)
6. The Deep Domain Test
Finally, he threw a college-level CS concept at it: "I want to know more about abstraction". KODA responded with a masterclass on Procedural vs. Data Abstraction, complete with Python, JS, and Java examples. (Pass ✅)
While doing the stakeout, I also noticed something else. Out of my 6 total signups, 3 were fake or ghost emails (like deneme@deneme.com
which is Turkish for "test").
My older brother (who is an engineering student and my unofficial Board of Directors) asked me: "Why keep them?"
He was right. Fake emails bounce, and high bounce rates destroy your Gmail sender reputation. So I did my first piece of Data Hygiene:
profiles
table.Now, bots and fake testers can't pollute my database. A clean database of 3 real humans is worth 100x more than a dirty database of 50 ghosts.
Stop guessing what features to build. Look at your telemetry.
When I saw another real user (reversality
) asking KODA "how to add PWA manifest", I realized I don't need to guess my roadmap. My users are literally typing my to-do list into the chat box.
If you are building a SaaS, go look at your database logs today. What are your users doing when they think you aren't watching? (P.S. I sent Nerando a "Sniper Email" letting him know I saw his stress test. Fingers crossed he replies!)
Built on a phone in Tamil Nadu. Powered by Supabase, Groq, and Netlify.
Try it if you want: koda-aicodementor.netlify.app