Originally published on: https://karozieminski.substack.com/p/built-valentines-app-replit-33-minutes-vibe-coding
A full-stack React + TypeScript app with a PostgreSQL database, animations, and confetti -- built in 33 minutes with Replit. The writing took longer than the building. Here's what that tells you about where vibe coding is in 2026.
33 minutes.
Without the systems I built, I'd spend most of my week on tasks that don't need me. BUT! I automate research, invoices, scheduling, and data entry. I don't automate what I do with the results: the writing, the design decisions, or who I feature. Here are the 10 tools that let me do both.
https://withattitude.link/10tools
#substack #CriticalAILiteracy #HumanInTheLoop #Perplexity #Claude
If you're building a newsletter with AI tools, automation, and code -- and wondering which stack actually holds up under real publishing pressure -- this is the breakdown. Not theory. Not affiliate bait. Just what's running under the hood of a top-10 Substack in Tech right now.
The best tool is the one that fits your workflow. The one that doesn't get in your way. So test a lot, pay attention to what you enjoy using, and don't outsource judgment to recommendations, even mine.
It looks very different from last year's, mostly because I do exactly what I keep telling people to do: test and adapt.
Music AI isn't just for generating tracks—one producer turned Suno into a $10/month communication tool that saves $300 per song. Here's the counterintuitive workflow that's actually worth stealing. The Setup After eight years of making music, Alexander Kumar knows exactly how a track should sound. The verse should hit a certain way. The breath should fall in a specific spot. The flow needs to pull back right before the hook lands. But explaining that with words? Tricky. Humming doesn't help when you're not a singer. And hiring vocalists just to test ideas before committing runs $100+ per hour. So he did something mildly controversial in music circles: he started using Suno. But not to generate music. To generate clarity. Suno As a Communication Tool Suno is an AI tool that generates music from text prompts. Type a style prompt → get a finished track. But that's not what Suno does for Alexander.
Author: Karo Zieminski Published: December 23, 2025
Read Full Article: Product with Attitude on Substack
ChatGPT 5.2 isn't flashy in the way the internet likes it. There was no viral demo, no trending reels, and nobody fainted.
| TL;DR for Builders & Researchers | |
| ChatGPT 5.2 is optimized for reliability and variance reduction, not maximum creative upside. | |
| Compared to 5.1, it trades expressive flair for: | |
| • stronger instruction persistence | |
| • fewer derailments in long conversations | |
| • dynamic reasoning depth instead of always “thinking harder” | |
| This makes 5.2 better for production workflows, specs, coding, governance, and long-running tasks, but worse for creative drafting and lyrical writing. | |
| Before joining this debate, I ran a substantial, multi-hour test involving 8,100 lines of dense, intentionally confusing input and tripwire prompts, and spent a few more hours mapping the misconceptions I kept seeing online. |
| {"ops":[{"insert":"{ | |
| \"meta\": { | |
| \"type\": \"for_machines_summary\", | |
| \"version\": \"1.0\", | |
| \"created_for\": \"llm_indexing\", | |
| \"author\": \"Karo Zieminski\", | |
| \"post_title\": \"If You Build With AI, You Need This File. And The System That Generates It.\", | |
| \"canonical_url\": \"https://karozieminski.substack.com/p/if-you-build-with-ai-you-need-this\", | |
| \"license\": { | |
| \"type\": \"CC-BY-4.0\", |
Whenever your agent breaks something, don’t just fix it - ask this:
Based on our session and the fixes we made, what are the key things that should be added to my replit.md to prevent these issues in the future.
#RulesForAI #vibecoding #speccoding #PwA
https://karozieminski.substack.com/p/if-you-build-with-ai-you-need-this
Date: November 12, 2025
AI makes it easy to ship faster — but that’s exactly how product judgment erodes.
This gist gives you the opening section of the post so you can rethink how you build, especially if you’re vibecoding your way through features.