Engineering & shipping notes
75 essays on AI app generation, multi-agent pipelines, deployment and the engineering decisions behind VULK.
74 articles
Product· 1 min readThe Small Stuff We Fixed in October 2026
Not everything we ship deserves its own post. A send button that no longer stops your build, fonts that don’t look AI-made, and six more sma…
Oct 15, 2026
João Castro
Inspiration· 2 min readA Gallery of 100+ Things You Can Build On
Whole sites, games, 3D estates and 85 live pieces. None of it is a screenshot: it all runs in your browser, ready for your next project.
Oct 15, 2026João Castro
Product· 2 min readWe Rebuilt VULK. Here’s What You Missed.
A new engine went live on August 28, 2026, and has learned something almost every day since: 3D you can download, Google Play bundles, a pub…
Oct 15, 2026João Castro
Technology· 8 min read3D Websites With VULK: What the Pipeline Really Does, From Prompt to GLB
How VULK builds 3D websites: Three.js and React Three Fiber in the code, GLB models from a photo or a sentence, with versions and numbers.
Oct 10, 2026João Castro
AI· 7 min readAI Images and Video Inside VULK Projects: Models and What Gets Checked
Which models make the images and video in a VULK project, at what resolutions, on which plans, and how a clip is checked before you see it.…
Oct 10, 2026João Castro
Mobile· 8 min readFlutter Apps With VULK: Live Preview and a Signed Android APK
What VULK gives you when you ask for a phone app: real Flutter code, a live preview, and a signed Android APK you can install. Measured buil…
Oct 10, 2026João Castro
Backend· 8 min readWhat VULK Builds Behind a Full-Stack App: Database, Sign-In and API, Checked Live
Every VULK full-stack app gets its own PostgreSQL database, user accounts and a REST API. This is what the generated code does, with live HT…
Oct 10, 2026João Castro
Development· 7 min readBuild With VULK From Claude and Other MCP Clients: The Connector, Tool by Tool
VULK has a remote MCP server at app.vulk.dev/mcp. Sign in once and Claude can list, read, create and continue your projects. All nine tools…
Oct 10, 2026João Castro
Product· 8 min readWhat We Shipped at VULK in October 2026 (So Far)
The VULK MCP connector, team workspaces, APK builds from the chat, designed Flutter apps, 26 typefaces, unpublish and more: everything shipp…
Oct 10, 2026João Castro