Hi, I am Quartz, building Post Black Belt. We have already entered the final quarter of 2024. I hope everyone is doing well and staying healthy. This year, I spent most of my time absorbing new ideas, trying things, failing, and then sharing what I learned. Questions kept leading to more questions, so I ended up reading more than 20 books in parallel and thinking deeply about what kind of product I should build, and for what purpose, in a fast-changing tech landscape.
In this post, I want to introduce the MVP of Poble AI. The first feature we launched is automatic technique hashtag generation. I will explain how it was built and how it can be used in practice.
AI Black Belt Beta Feature
Long-time Post Black Belt users may remember this. After many AI models were released publicly, I built a simple chat feature and launched AI Black Belt as a beta about a year ago. But at that time, there were clear limits to using large language models inside a jiu-jitsu app.
- It needed additional fine-tuning or training on jiu-jitsu knowledge.
- The use case was too broad and not focused enough.
- Keeping data up to date required a wider development scope.
Even so, I wanted to see how users would actually use it, and that test gave me important direction for what to build next.
Technique Hashtags
Why do you use Post Black Belt? What do you usually write in your jiu-jitsu journal?
- To record when and how much you trained
- To reset your mindset for better training
- To categorize techniques and improve your game
The most common feedback I received was requests to select overlapping technique categories and to log techniques in more detail. In AI chat usage, I also saw the strongest pattern around questions on specific techniques. I wanted to solve everything at once, but considering migration cost and development effort, implementing technique hashtags first was the right step.
Still, this feature took time because I wanted to build it right. We already provide around 150 hashtags in Post Black Belt, and that number will keep growing. Manually searching and entering each one is tiring and inefficient.
Poble AI Automatic Hashtag Generation
"If users already wrote it in their journal, why should they search again manually?"
That question led me to build one-click hashtag generation from journal content. Using OpenAI models, I implemented Poble AI to make that flow real.
One of my key focuses this year has been making workout logging easier and faster. I added a quick-entry modal for users who just want to record training without friction, and improved the journal editor to be more intuitive.
I also made hashtags clickable so users can jump directly to search results and see related entries right away. Going forward, I want to keep pushing not only feature implementation but also overall product experience.
Closing
Some users may already want to try this feature. Because of AI API costs, it is currently available to subscribers only. Post Black Belt will continue to launch more AI-powered features, so if this is useful for you, I hope you can explore the rest through subscription as well.
Thank you as always for using the app. If you have feedback, please let me know anytime. I hope you have a great October.
