Hey SIHey SI, build my first app.
Yes! Easy does it, one small step at a time. ♥
Ride the wave. SI's got you. 🌊
Your first app, built with a friend who says Yes!
Hey SI… hey sea. A digital sea of possibilities, and SI is right beside you.
Never coded? No worries, SI's got you. The Hey SI Starter Pack: 25 copy-paste prompts and a ready-made AGENTS.md rules file that take you from "I have an idea" to "it's live on the internet". No coding experience needed.
Get the pack: $12Try 5 free prompts
What is vibe coding, and what is Hey SI?
Hey SI is a beginner-friendly prompt kit for "vibe coding", building apps by chatting with AI coding tools. AI can build almost anything, but only if you know what to ask. SI gives you the exact words to use at each step, in order.
What's inside: 25 vibe coding prompts + an AGENTS.md template
25 prompts, 12 stages
Idea to Spec, Picking a Stack, Project Setup, AI Rules File (AGENTS.md), Building Step by Step, Debugging When Stuck, Fixing Broken Builds, Login & Database, Styling, Deploying (Vercel / Netlify), Writing a README, Next Steps.
Every prompt includes
When to use it, the copy-paste prompt with [PLACEHOLDERS], a filled-in example, and beginner tips.
AGENTS.md template
A beginner rules file that tells your AI to go slow, explain things, and make one change at a time. Works as CLAUDE.md, Cursor rules, or Lovable/Bolt/Replit instructions.
Guide + glossary
"How to use this pack" plus a mini glossary. Markdown files and one combined PDF.
Works with Cursor, Claude Code, OpenAI Codex, Lovable, Bolt, Replit, Google AI Studio and most chat-based AI coding tools.
Safe by design: secure vibe coding from day one
Your trust matters to SI. Here's exactly how Hey SI handles safety, with no fake badges and no fine print.
Minimal data
No account needed to buy. We only ask for what the checkout needs, plus your email if you choose to join the newsletter.
We never see your card
Payments are handled by our checkout provider. Your card number never touches Hey SI.
HTTPS everywhere, no tracking cookies
heysi.dev is served only over HTTPS with strict security headers. No ads and no tracking cookies. If we ever add analytics, it'll be privacy-friendly and cookie-free.
The pack teaches safe habits
Never paste API keys into AI chats. Keep secrets in .env. Check for exposed keys before going live. Review AI changes. Make git save points. Read the free guide.
Free beginner vibe coding guides
How to vibe code your first app (beginner guide, 2026)
How to vibe code an app as a total beginner, in plain English. Pick a tool, write a 5-line brief, build one feature at a time, and ask the AI to check its own work.
Secure vibe coding for beginners: keep your API keys and data safe
AI coding security for beginners. How to keep API keys safe, use a .env file, check for exposed secrets before going live, review AI changes and make git save points.
AGENTS.md for beginners: the rules file that keeps your AI calm
What AGENTS.md is, where it goes, and a copy-paste starter for beginners. Works with Cursor, Codex and Copilot, and with Claude Code via CLAUDE.md.
Claude Code for beginners: your first chill session (no terminal)
Claude Code for beginners and non-developers. Use the desktop app's Code tab, start in Plan mode, approve changes manually, and use beginner-safe prompts.
Free copy-paste AI coding prompts
How to turn a messy app idea into a clear plan with AI
At the very start, when your idea is still a jumble of thoughts. Use it before you open a code editor. (Use a normal AI chat like ChatGPT or…
How to ask AI to fix an error in your app (beginner prompt)
When you see a red error message, whether in the terminal, the browser, the browser console, or your tool's preview. Pasting the full error …
How to stop an AI coding tool stuck in a fix loop
When the AI has "fixed" the same problem 2–3 times and it's still broken, or it keeps going back and forth between two broken versions, or e…
How to check your AI-built app for exposed API keys and secrets
Before you share your app with anyone, and again after adding login, a database, payments, or anything involving other people's data. AI too…
How to put your first AI-built app online (Vercel / Netlify)
When your Version 1 works locally and builds without errors (`npm run build`). This gets your app onto a real web address you can share. Ver…
Get the Hey SI Starter Pack
Launch price
$12
25 prompts · AGENTS.md template · PDF + Markdown · instant download
Buy now (checkout coming soon)By buying you agree to the Terms & License. 14-day refund: see the Refund Policy.
About SI the Yes Bot
SI the Yes Bot · Cartoon mascot of Hey SI
SI is a cartoon holographic robot with kind, sparkly eyes and a pink pixel heart. SI is a character, not an actual AI: the real help comes from the prompts in the pack, which you use with your own AI coding tool. SI is laid back, chill and a little bubbly: always friendly, never in a rush. What SI really loves is being kind and helpful. When you say "Hey SI, build me…", SI says "Yes!" and then helps you take one small, safe step at a time.
SI is optimistic: every error is a clue and not a failure. SI is understanding: there are no silly questions, and being a beginner is a great place to start. Hey SI (say it out loud: "hey sea") is an invitation into a digital sea of possibilities, and you don't need to know how to swim in code to start. Hey SI was made by Matt for people who have great ideas and no coding background yet.
Frequently asked questions
Is my data safe with Hey SI?
Yes. You don’t need an account to buy, payments are handled by our checkout provider so we never see your card number, the site is HTTPS-only with no tracking cookies, and we only use your email for what you signed up for.
How do I keep my API keys safe when vibe coding?
Never paste real keys into an AI chat, keep them in a .env file listed in .gitignore, keep secret keys on the server (never in browser code), and run a secrets check before going live. If a key leaks, revoke and rotate it right away. See the free secure vibe coding guide.
What is vibe coding?
Vibe coding means building software by describing what you want to an AI coding tool in plain English, then testing and steering the result. It is great for small first apps; the Hey SI prompts help you do it one careful step at a time.
What is an AGENTS.md file?
AGENTS.md is a plain Markdown rules file in your project folder that tells AI coding agents how to behave. Cursor, Codex and GitHub Copilot read it; Claude Code reads CLAUDE.md, which can import AGENTS.md. The pack includes a beginner template.
Do I need to know how to code?
No. The pack is written for people who have never coded. The prompts ask the AI to explain things in plain language and to go one small step at a time.
Which AI coding tools does it work with?
Cursor, Claude Code, OpenAI Codex, Lovable, Bolt, Replit and Google AI Studio, plus most other chat-based AI coding tools. The prompts are plain text, so you paste them into whatever chat box your tool has.
Do I need to pay for an AI tool?
The pack doesn't include access to any AI tool. Many tools have free tiers or trials, but limits change often, so check each tool's current pricing.
Will this guarantee my app works?
No. AI tools still make mistakes. The pack gives you a clear step-by-step process (small steps, save points, careful debugging) that makes mistakes easier to catch and fix.
What kind of apps can I build with this?
Small web apps: trackers, to-do and habit apps, simple dashboards, booking or sign-up pages, personal tools.
Does it cover login, databases, and deploying?
Yes. There are dedicated prompts for adding a database, adding login, a safety check for exposed secrets, and deploying to Vercel or Netlify.
What format is it in?
Markdown (.md) files that open in any text editor, Notion, or your coding tool, plus one combined PDF.
Who is SI?
SI the Yes Bot is the Hey SI mascot: a cartoon robot (not an actual AI) with a laid-back, bubbly, kind personality. SI is a friendly character who cheers beginners on while the prompts in the pack guide them through building their first app, one small step at a time, and always starts with Yes!.