The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started
Back to feedPost
Hey Contra 👋
Two months ago I posted Promptly here as a work-in-progress and said I'd launch in about three weeks.
Then a health issue knocked me flat, and the three-week plan was gone.
I'm good now — and as of today, the build is done. I just published the full case study as well.
Quick recap: after shipping 20+ projects as a tech lead, I kept watching the same thing break. A founder says one thing, the developer hears another, and a month in, the whole build is based on a misunderstanding nobody caught early.
Promptly closes that gap. You describe your idea in plain English; the AI interviews you, pushes back on the vague parts, and writes a developer-ready spec while you chat.
But the chat is the easy part. The real engineering is everything that stops the AI from being trusted too much:
→ It never touches the database. 16 agents can only propose changes through typed tool calls; backend code checks each one, and invalid calls get rejected and logged.
→ Nothing ever gets lost. It snapshots before anything risky, so you can roll back a single module or the whole project.
→ Spend is capped, always. Every AI call passes four checks before it fires, and each one is logged with its exact cost.
One line sums up the architecture:
The AI proposes. The code decides.
The model gets to be creative. It never gets to be in charge.
Full case study is on my profile, and the product is live if you want to poke at it.
One question:
Shipped anything with LLMs in production? What guardrail saved you — or what missing one burned you?
Every comment on the last post shaped what got built. Thank you for that 🙏
building solo, in public
This is an insance product, this steamlined my client requirements, make it very smooth
Congrats on shipping "AI proposes, code decides" is the right split, and routing all 16 agents through typed tool calls (instead of raw DB access) is what actually makes that enforceable rather than aspiration.
Congrats on shipping! Love the emphasis on hard guardrails and deterministic validation. That’s exactly how you build trust with LLMs. Excited to poke around the build.
The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started
Related posts
Agentic AI Development in Australia
What if your AI could not just answer questions but actually get work done?
That is the idea behind Agentic AI Development in Australia. We build AI agents that plan, make decisions and carry out multi step tasks on their own, from research and data processing to handling routine business workflows.
Instead of another tool your team has to manage, you get a digital teammate that works in the background.
If you want to see what agentic AI could automate in your business, take a look at our services here: https://aiventechnologies.com/agentic-ai-development-in-perth-australia/
$5K on @Contra The AI hasn't replaced me yet.
While talking to the AI, I explained to it that it would be safer for everyone if I stayed in animation, because if I had to go do manual labor... physically.
Guys, I'll bring about the apocalypse before the Terminators even get here.
Generative AI Development in Australia
Generative AI is changing how businesses create content, build products and solve problems, and our Generative AI Development in Australia service helps you put it to work the right way.
We build custom generative tools for content creation, product design, data synthesis and more, all tailored to your industry and your goals.
No generic plug ins, just AI built to fit how your business actually operates.
Ready to see what generative AI could unlock for you?
Learn more at: https://aiventechnologies.com/generative-ai-development-in-perth-australia/
