Justin Fan

Building 🌉.

[Justin Fan @TheJFann]

Building https://t.co/5Pr4g958ZE for personal trainers.

Automate your entire coaching stack with ai so you can focus on training clients.

Scale your expertise with a coaching platform that understands and remembers how you like to program for clients.

[Justin Fan @TheJFann]

@BStulberg so good

[Justin Fan @TheJFann]

Trying to make it easier for coaches to diff the actual prescribed sets / reps vs. actually completed sets / reps. Surprisingly dense how much information you need to capture when logging workouts. Eventually, the idea is to feed all this data to an AI

[Justin Fan @TheJFann]

AI loves to make this kind of UI. First sign that the UI was AI generated IMO

[Justin Fan @TheJFann]

Starting to think that I need to implement a no-vibing rule from 9am-12pm

[Justin Fan @TheJFann]

And then sometimes we get this:

[Justin Fan @TheJFann]

https://t.co/SU7vA7ZEzu quite amazing how far video + audio gets you for these kinds of workout instructionals. Prompt is pretty simple

[Justin Fan @TheJFann]

Another example

[Justin Fan @TheJFann]

Easy way to do some e2e tests in the background: use the playwriter mcp tool to go through test cases that you've written out / described in a markdown file, and let claude / cursor go to town

[Guillermo Rauch @rauchg]

From now on, hype-centric splashy launches will likely be strongly uncorrelated with success.

If by the time you launch you don’t have escape velocity, you will likely get Sybil attacked¹. Agents will spin up 10 competing products with your same interface.

Start with an audience of 1 and get confirmation that it works. Then expand to a circle of friends or design partners. By the time you go public, your moat needs to be deeper than it’s ever been.

¹ https://t.co/aAhxdYwkv7

[Justin Fan @TheJFann]

tmux x background agents is great

[Justin Fan @TheJFann]

Getting quite far with designing pretty nice UI with Opus + the frontend design skill

[Justin Fan @TheJFann]

For anyone who has domain knowledge, agents / ai are a massive accelerator, but I just dont see how you can really vibe your way to expertise if all you're doing is spitting out junk

[Justin Fan @TheJFann]

It's wild the bubble that we live in. People here on twitter / in SF are talking about ralph loops / agent orchestration, meanwhile back in Hong Kong, folks are still copy pasting into chat gpt.

[Justin Fan @TheJFann]

coding with ai is so much more fun than coding without ai

[Justin Fan @TheJFann]

hey @convex, could you make your playground remember the current user in url search params? Would be a great little improvement for DX

[Justin Fan @TheJFann]

@pontusab 🔥

[Justin Fan @TheJFann]

Noodling on an idea. What if fitness coaches were able to have a 'cursor-like' experience when making changes to workout programs for their clients

[Justin Fan @TheJFann]

@johnsummit Friday was insane man

[Justin Fan @TheJFann]

@johnsummit Friday was too good