September 29, 2026
LatestFour practical Frontend AI guides
New guides cover streaming Markdown, structured generative UI, AI security, and approval flows so you can build AI products that stay reliable after the demo.
Explore Frontend AIProduct updates
Changelog
A quick record of what is new in HelloFrontend. Each update is kept short so you can see what changed at a glance.
September 12, 2026
Beginner-friendly System Design guides
Eight System Design lessons now begin with a simple explanation, mental model, visual flow, and step-by-step interview guidance.
Explore System DesignSeptember 11, 2026
Clearer System Design discovery
System Design cards now have stronger visual thumbnails, and search stays separate on each learning route so your results do not follow you between topics.
Explore System DesignSeptember 10, 2026
AI Customer Support Agent lesson
A new System Design lesson walks through designing an AI customer support agent, from the core architecture to practical trade-offs.
Open the lesson librarySeptember 10, 2026
Smoother onboarding and content discovery
The first-run experience and content indexing have been refined so it is easier to find the right practice material and get started.
Go to dashboardSeptember 8, 2026
Richer interview explanations
Selected interview content now includes improved explanations and guidance to help you understand the reasoning, not just reach an answer.
Practice questions