Jason Kerner

CTO and Co-Founder, @hanselmedical.
In to all things AI, tech, dev, product - as well as nerd stuff; trains, planes, Lego, photography.

[Jason Kerner @jasonkerner]

"The only thing necessary for the triumph of evil is for good men to do nothing." - Edmund Burke, 1729-1797

[Jason Kerner @jasonkerner]

@cursor_ai When using Plan Mode, the questions don't seem to be as well integrated into the Cursor UI as when Planning with Composer 2.5 (ie, it presents the possible answer choices as clickable choices) - is that coming?

[Jason Kerner @jasonkerner]

@benwilsondev So while SES is cheap; I prefer the traceability and features of Sendgrid. All depends on volume when people say things are cheap, but even Sendgrid's base tier is $20/month for a lot of emails.

[Jason Kerner @jasonkerner]

@PovilasKorop @maxedapps Showed up for me in Cursor last night, been using it already. Very fast.

[Jason Kerner @jasonkerner]

@ashleyhindle Yep - we use Laravel Pennant; set flags up at user level and account level (depending on what the feature does)

[Jason Kerner @jasonkerner]

@ocornut Kinda no reason to be really be in Android Studio; apart from building... just open the same project in Cursor and build in there.

[Jason Kerner @jasonkerner]

@JeremyClarkson @AndersonRJM @MerlinBirdID Check this out @JeremyClarkson Combines bird database with AI drawing for live artwork. Cool DIY project https://t.co/cyHm0viAve

[Ole Lehmann @itsolelehmann]

i'm obsessed with AI DIY projects

my favorite one right now is this guy who built an AI system that listens for birds outside his apartment, figures out what species they are, and paints them on his wall.

here's how the whole thing works:

1. a cheap usb mic on his balcony listens for birdsong 24/7

2. BirdNET, Cornell's AI model trained on 6,000+ species, names each bird species from the sound alone (no camera needed)

3. every time it hears one, Gemini 2.5 Flash Image paints that exact bird in the style of an Edo-period japanese woodblock print

4. the new painting drops into a live collage of everything that's been singing outside in the last 24 hours

5. and it all shows up on a framed e-ink display on his wall that reads "heard today" like a little museum placard for his neighborhood

knowing which birds visit you used to take a field guide, a trained ear, plus years of patient practice.

teddy just glances at the frame on his wall and sees the cardinal came back this morning

honestly i'm highly tempted to build one myself haha

[Jason Kerner @jasonkerner]

@JakeFleshner Healthcare Airtag

[Jason Kerner @jasonkerner]

@bscholl So how much do you end up keeping (% wise) for final parts vs what you started? And then what do you do with the bits? Can you melt it down and re-use?

[Jason Kerner @jasonkerner]

@PovilasKorop These are interesting - thanks for putting the effort in to test & share the results. Personally, I use Composer 2.5 all the time. Even if I had to prompt it again, its still cheaper & your test confirms it. Its over 4x cheaper than the model in 1st place. Hugely more value.

[Jason Kerner @jasonkerner]

@PovilasKorop @LaravelLiveUK I semi agree; the cost of supporting codebases is massively reduced now. Personally, its worthy of a re-evaluation. Devs already have multiple things to support anyway. RN has a habit of breaking changes. Flutter relies heavily on community filling gaps. Sunk cost is a thing too.

[Jason Kerner @jasonkerner]

@allenholub All of this now is even more irrelevant. The act of estimation, pointing, scrums, etc; was ultimately so someone could decide what order to do something as dev was $$$. The cost of dev is nearing zero with agentic development. So the decision based on opportunity cost also gone.

[Jason Kerner @jasonkerner]

@antoniojmps Interested in an example of the structure... personally I'm using Cursor with Composer 2, and its following the patterns and structure I have already in my codebase; it doesn't seem to go an invent new ones.

[Jason Kerner @jasonkerner]

@elonmusk I'm all for the changes you've done to X since buying Twitter... but your team definitely needs to do something about the AI crap ads and bots flooding the timeline in For You. Every 3rd tweet is "What's happened?" with Farage apparently doing something.

[Jason Kerner @jasonkerner]

@jasonshah Yeh, the "never update" approach is bad. Not only for the point of trying to sell later - it'll flag like crazy. But also, yes it works now, but what about this giant security hole that we only just uncovered? Might affect you & could be used for sophisticated hacks. Thats why.

[Jason Kerner @jasonkerner]

@KarenPayneMVP Does it need (and why doesn't it have already?) some approval process (ie, same way App Stores / Apple) does it?
You could probably AI some of it... static analysis tools... theres loads of things it could flag for human review before it gets out into the world.

[Jason Kerner @jasonkerner]

@kapilansh_twt If teams are sharing .env, its likely your dev environment or lower environments; therefore, all your secrets shouldn't be production ones, be different from production and capped (token usage, quotas, etc). So doesn't matter. Production secrets go in a vault in your CD pipeline.

[Jason Kerner @jasonkerner]

@jorgemanru Amazon... its obviously got the same rule logic to make decisions for items you need to get support on up to a certain value; just refund it, or get a replacement.

The other one is @cursor_ai chatbot and @ElevenLabs - I both had questions regarding the subscription & it worked

[Jason Kerner @jasonkerner]

@AmanVirk1 Use @magicpatterns instead... connect the MCP server up to Cursor... boom... design => code.

[Jason Kerner @jasonkerner]

@simonbrown This doesn't exist to make developers better. This exists to provide guardrails for enterprises with Copilot and Github licences who need something better to report up the management chain that they aren't just generating code all over the place. Its enterprise risk mitigation.