> ls ./tools
Free tools for vibe coders
Everything runs in your browser. No signup.
VibeBoot DoctorNew
One box for every fixer: paste a Next.js, Auth.js, Prisma or Stripe webhook error, a .env, middleware.ts or your package.json and get the diagnosis, the fix, a Cursor prompt and the Cursor Rules Pack rule that prevents it.
Open →middleware.ts → proxy.tsNew
Paste middleware.ts and get proxy.ts back: renamed export, export { auth as proxy } for Auth.js v5, runtime line removed, deprecated types updated, with a diff and an explanation of each change.
Open →AGENTS.md checkerNew
Paste AGENTS.md and check the Next.js 16.3+ managed nextjs-agent-rules block, stack and version, test/lint/build commands, and auth, payment and secrets rules, with a suggestion for every gap.
Open →Access control checker
Paste a Next.js route.ts, page, server action or proxy.ts and find missing auth() checks, UI-only gating, missing ownership checks and proxy matcher gaps, each with a before → after fix and a Cursor prompt.
Open →Prisma error fixer
Paste a Prisma error or P-code (did not initialize yet, P2002 unique constraint, P1001 can't reach database, P2021 missing table, pool timeouts, PrismaClient in the browser…) and get the cause, the fix and a Cursor prompt.
Open →Next.js error fixer
Paste a Next.js 16 error (useState in a Server Component, event handlers, useSearchParams Suspense, hydration, params is a Promise…) and get the cause, the fix and a Cursor prompt.
Open →Env leak checker
Paste your .env and see which secrets a NEXT_PUBLIC_ / VITE_ prefix would ship to the browser: Stripe and OpenAI keys, service_role, database URLs.
Open →Stripe webhook fixer
Paste a Stripe webhook error (No signatures found, 308 redirect, 401, tolerance zone, duplicates…) and get the cause, the fix, code and a Cursor prompt.
Open →Auth.js error fixer
Paste an Auth.js v5 error (MissingSecret, UntrustedHost, error=Configuration, redirect_uri…) and get the cause, the fix and a Cursor prompt.
Open →AGENTS.md generator
Pick your Next.js stack and get a ready AGENTS.md (plus CLAUDE.md) for Cursor, Codex and Claude Code.
Open →Cursor Rules PackFree download
Scoped .cursor/rules .mdc files for Next.js, Supabase, Stripe, Stripe webhooks, access control, Tailwind + shadcn and the AI SDK, plus an AGENTS.md template.
Open →Cursor rules generator
Build one project.mdc rule for your Next.js stack: auth, database, Stripe, Tailwind and tests.
Open →AI chatbot cost calculator
Cost per message, Pro margin after Stripe fees and a safe free-tier cap for your AI chat app.
Open →
> skip the fixing
Want the parts these tools fix already built?
Each starter is a working Next.js 16 app with auth, Stripe and the database wired and tested, plus matching AGENTS.md and Cursor rules. One-time payment.
SaaS Starter · $49
Auth.js v5 (GitHub and magic link), Stripe subscriptions with a verified webhook, Customer Portal and Prisma.
14-day money-back guarantee · lifetime updates
AI Chatbot Starter · $59
Streaming chat on the AI SDK, saved conversations, Free vs Pro limits enforced on the server, and Stripe.
14-day money-back guarantee · lifetime updates