Tags: prototype

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Tuesday, August 5th, 2025

Vibe code is legacy code | Val Town Blog

When you vibe code, you are incurring tech debt as fast as the LLM can spit it out. Which is why vibe coding is perfect for prototypes and throwaway projects: It’s only legacy code if you have to maintain it!

The worst possible situation is to have a non-programmer vibe code a large project that they intend to maintain. This would be the equivalent of giving a credit card to a child without first explaining the concept of debt.

If you don’t understand the code, your only recourse is to ask AI to fix it for you, which is like paying off credit card debt with another credit card.

Saturday, July 19th, 2025

Vibe coding and Robocop

The short version of what I want to say is: vibe coding seems to live very squarely in the land of prototypes and toys. Promoting software that’s been built entirely using this method would be akin to sending a hacked weekend prototype to production and expecting it to be stable.

Remy is taking a very sensible approach here:

I’ve used it myself to solve really bespoke problems where the user count is one.

Would I put this out to production: absolutely not.

Tuesday, May 27th, 2025

Uses

I don’t use large language models. My objection to using them is ethical. I know how the sausage is made.

I wanted to clarify that. I’m not rejecting large language models because they’re useless. They can absolutely be useful. I just don’t think the usefulness outweighs the ethical issues in how they’re trained.

Molly White came to the same conclusion:

The benefits, though extant, seem to pale in comparison to the costs.

Rich has similar thoughts:

What I do know is that I find LLMs useful on occasion, but every time I use one I die a little inside.

I genuinely look forward to being able to use a large language model with a clear conscience. Such a model would need to be trained ethically. When we get a free-range organic large language model I’ll be the first in line to use it. Until then, I’ll abstain. Remember:

You don’t get companies to change their behaviour by rewarding them for it. If you really want better behaviour from the purveyors of generative tools, you should be boycotting the current offerings.

Still, in anticipation of an ethical large language model someday becoming reality, I think it’s good for me to have an understanding of which tasks these tools are good at.

Prototyping seems like a good use case. My general attitude to prototyping is the exact opposite to my attitude to production code; use absolutely any tool you want and prioritise speed over quality.

When it comes to coding in general, I think Laurie is really onto something when he says:

Is what you’re doing taking a large amount of text and asking the LLM to convert it into a smaller amount of text? Then it’s probably going to be great at it. If you’re asking it to convert into a roughly equal amount of text it will be so-so. If you’re asking it to create more text than you gave it, forget about it.

In other words, despite what the hype says, these tools are far better at transforming than they are at generating.

Iris Meredith goes deeper into this distinction between transformative and compositional work:

Compositionality relies (among other things) on two core values or functions: choice and precision, both of which are antithetical to LLM functioning.

My own take on this is that transformative work is often the drudge work—take this data dump and convert it to some other format; take this mock-up and make a disposable prototype. I want my tools to help me with that.

But compositional work that relies on judgement, taste, and choice? Not only would I not use a large language model for that, it’s exactly the kind of work that I don’t want to automate away.

Transformative work is done with broad brushstrokes. Compositional work is done with a scalpel.

Large language models are big messy brushes, not scalpels.

Thursday, February 13th, 2025

Putting the ink into design thinking | Clearleft

The power of prototyping:

Most of my work is a set of disposables rather than deliverables, and I celebrate this.

I like the three questions that Chris asks himself:

  1. What’s the quickest, cheapest thing I can create to help make the next design decision?
  2. What can I create to best demonstrate the essence of the concept?
  3. How can I most effectively share the thinking behind the design with decision-makers?

Friday, March 29th, 2024

Prototypes, production & fidelity layers | Trys Mudford

I’ve always maintained that prototyping and production require different mindsets. Trys suggests it’s not as simple as that.

I agree with much of what he says about back-end decisions (make it manual ‘till it hurts—avoid premature optimisation), but as soon as you’re delivering HTML, CSS, and JavaScript to real people, I think you need to meet certain standards when it comes to accessibility, performance, etc.

Friday, September 15th, 2023

We’re still not innovating with AI-generated UI.

Prototypes and production:

It looks like it will be a great tool for prototyping. A tool to help developers that don’t have experience with CSS and layout to have a starting point. As someone who spent some time building smoke and mirrors prototypes for UX research, I welcome tools like this.

What concerns me is the assertion that this is production-grade code when it simply is not.

Wednesday, August 9th, 2023

Coding prototypes

We do quite a bit of prototyping at Clearleft. There’s no better way to reduce risk than to get something in front of users as quickly as possible to test whether you’re on the right track or not.

As Benjamin said in the podcast episode on prototyping:

It’s something to look at, something to prod. And ideally you’re trying to work out what works and what doesn’t.

Sometimes the prototype is mocked up in Figma. Preferably it’s built in code—HTML, CSS, and JavaScript. Having a prototype built in the materials of the medium helps establish a plausible suspension of disbelief during testing.

Also, as Trys said in that same podcast episode:

Prototypical code isn’t production code. It’s quick and it’s often a little bit dirty and it’s not really fit for purpose in that final deliverable. But it’s also there to be inspiring and to gather a team and show that something is possible.

I can’t reiterate that enough: prototype code isn’t production code.

I’ve written about the two different mindsets before:

So these two kinds of work require very different attitudes. For production work, quality is key. For prototyping, making something quickly is what matters.

Addy recently wrote an excellent blog post on the topic of prototyping. The value of a prototype is in the insight it imparts, not the code.

It’s crucial to remember that in a prototype, the code serves merely as a medium—a way to facilitate understanding. It’s a means to an end, not the end itself. The code of a prototype is disposable and mutable. In contrast, the lessons learned from a prototype, the insights gained from user interaction and feedback, are far more durable and impactful.

This!

It can be tempting to re-use code from a prototype. I get it. It seems like a waste to throw away code and build something from scratch. But trust me—and I speak from experience here—it will take more time to wrangle prototype code into something that’s production-ready.

The problem is that quality is often invisible. Think about semantics, performance, security, privacy, and accessibility. Those matter—for production code—but they’re under the surface. For someone who doesn’t understand the importance of those hidden qualities a prototype that looks like it works seems ready to ship. It’s understandable that they’d balk at the idea of just throwing that code away and writing new code. Sometimes the suspension of disbelief that a prototype is aiming for works too well.

As is so often the case, this isn’t a technical problem. It’s a communication issue.

Wednesday, June 28th, 2023

Why I moved on from Figma – No Handoff

A good looking artifact too early in the process gains buy-in too quickly and kills discovery.

Monday, June 12th, 2023

Sunday, March 19th, 2023

Design notes on the 2023 Wikipedia redesign

So then the question becomes: how do you most effectively communicate designs, to facilitate the best discussions about those designs? My answer is: lots of little prototypes built with HTML, CSS, and JavaScript.

Tuesday, July 19th, 2022

An Archeology for the Future in Space

I really enjoyed this deep dive into some design fiction work done by Fabien Girardin, Simone Rebaudengo, and Fred Scharmen.

(Remember when Simone spoke at dConstruct about toasters? That was great!)

Thursday, June 23rd, 2022

The Demo → Demo Loop - daverupert.com

I’m 100% convinced that working demo-to-demo is the secret formula to making successful creative products.

Monday, June 6th, 2022

Paper Prototype CSS

A stylesheet to imitate paper—perfect for low-fidelity prototypes that you want to test.

Tuesday, September 14th, 2021

Benjamin Parry~ Writing ~ Engineering a better design test ~ @benjaminparry

It sometimes feels like we end up testing the limitations of our tools rather than the content and design itself.

What Benjamin found—and I heartily agree—is that HTML prototypes give you the most bang for your buck:

At the point of preparing for usability testing, it seemed ludicrous to move to any prototyping material other than the one we were already building in. The bedrock of the web: HTML, CSS and Javascript.

Tuesday, August 3rd, 2021

Hacks Are Fine / Matt Hogg FYI

If you employ a hack, don’t be so ashamed. Don’t be too proud, either. Above all, don’t be lazy—be certain and deliberate about why you’re using a hack.

I agree that hacks for prototyping are a-okay:

When it comes to prototypes, A/B tests, and confirming hypotheses about your product the best way to effectively deliver is actually by writing the fastest, shittiest code you can.

I’m not so sure about production code though.

Wednesday, March 3rd, 2021

Prototyping on the Clearleft podcast

The latest episode of the Clearleft podcast is live and it’s all about prototyping.

There’s a bit of a narrative thread in there about airplanes, kicked off by a great story Benjamin tells about testing a physical prototype …of the inside of a transatlantic airliner. Lorenzo recounts his story of mocking up a fake CMS with readily-available tools. And Trys tells of a progressive web app he whipped up for our friends at Suffolk Libraries. There’s even a bit about Hack Farm in there too.

But just to make sure it isn’t too much of a Clearleft love-in, I also interviewed an outside expert: Adekunle Oduye. It was very kind of him to give up his time, especially considering he had just moved house …in a pandemic!

There are some great words of wisdom, immortalised in the transcript:

Prototypical code isn’t production code. It’s quick and it’s often a little bit dirty and it’s not really fit for purpose in that final deliverable. But it’s also there to be inspiring and to gather a team and show that something is possible.

—Trys

If you’re building something and you’re not really sure if it’s a right solution, use the word prototype versus design, because I feel like when people say design, that’s like the end result.

—Adekunle

I always think of a prototype as a prop. It’s something to look at, something to prod. And ideally you’re trying to work out what works and what doesn’t.

— Benjamin

The whole episode is just over 21 minutes long. Have a listen and enjoy the stories.

If you like what you hear, please spread the word. Tell your Slack colleagues, your Twitter friends, your LinkedIn acquaintances. And if you’re not already subscribed, you can remedy that on Apple Podcasts, Google Podcasts, Spotify, Overcast and anywhere that accepts RSS.

Friday, January 17th, 2020

Demos, Prototypes, and MVPs | Jacob Kaplan-Moss

I’m usually building one of three things: a demo, a prototype, or a minimum viable product (MVP).

I’ve seen some confusion over these terms — some people seem to use them somewhat interchangeable. But they’re not the same thing, and building one when you need another can cause problems.

This is a very useful distinction!

Monday, October 8th, 2018

Notes on prototyping – Ben Frain

Good tips on prototyping using the very materials that the final product will be built in—HTML, CSS, and JavaScript.

The only thing I would add is that, in my experience, it’s vital that the prototype does not morph into the final product …no matter how tempting it sometimes seems.

Prototypes are made to be discarded (having validated or invalidated an idea). Making a prototype and making something for production require very different mindsets: with prototyping it’s all about speed of creation; with production work, it’s all about quality of execution.

Thursday, July 12th, 2018

Steve Jobs on Prototypes - Snook.ca

I’ve thought often of how our design and prototyping tools for the web are often not of the web. Tools like Photoshop and Sketch and Invision create approximations but need to walk the line between being a tool to build native apps and to build web apps. They do well in their ability to quickly validate designs but do little to validate technical approach.

Friday, January 12th, 2018

Saving Your Web Workflows with Prototyping · Matthias Ott – User Experience Designer

A well-written (and beautifully designed) article on the nature of the web, and what that means for those of us who build upon it. Matthias builds on the idea of material honestly and concludes that designing through prototypes—rather than making pictures of websites—results in a truer product.

A prototyping mindset means cultivating transparency and showing your work early to your team, to users – and to clients as well, which can spark excited conversations. A prototyping mindset also means valuing learning over fast results. And it means involving everyone from the beginning and closely working together as a team to dissolve the separation of linear workflows.