Guides11 min read
Auth.js to Better Auth: Four Ways the Migration Fails Quietly
The library swap is one file. The migration is your database, and every way it goes wrong leaves a valid schema, no error, and users who cannot sign in.
Blog
Guides, product updates and build notes. Follow along via RSS.
Guides10 min read
Open Source Clerk Alternatives: The Three Shapes They Come In
The lists name the same nine projects. They are three different kinds of software, and picking the wrong shape costs more than the invoice you left.
Guides8 min read
Next.js Folder Structure: What Survived Ten Releases
The tree behind a production App Router codebase: route groups, where the private area sits, and the refactor that turned every blog image into a 404 for two days.
Guides8 min read
Auth.js v5 and Prisma in Next.js: What the Adapter Does Not Do
The Prisma adapter stores users, not sessions. The schema, the strategy that credentials sign-in picks for you, and how to revoke a token that cannot be revoked.
Guides11 min read
What Authentication Actually Costs, Both Ways
The vendor invoice and the maintenance bill, with real numbers on both sides, and the question that actually decides which one you pay.
Guides9 min read
Stripe Webhook Idempotency Without a Dedupe Table
Stripe retries for three days, so your handler runs twice. The fix is usually smaller than the event-ID table everyone recommends.
Guides13 min read
Self-Hosted Authentication in Next.js: A Complete Guide
What self-hosted authentication means, what it costs to run, and the Auth.js and Prisma code that ships in a free Next.js starter kit.
Engineering8 min read
Per-Seat Billing Is a State Machine, Not a Number
Adding a seat mid-cycle does not charge, removing one does not refund. The money bugs in team billing live in the transitions.
Guides11 min read
Next.js Authentication Middleware Is Now Proxy
What the Next.js 16 rename changes for route protection, the code that runs in production, and the mistake we shipped.
Guides8 min read
How to Migrate to Self-Hosted Authentication
The code is the easy half. The migration is decided by whether you can take your password hashes with you, and that answer differs by provider.
Guides3 min read
How to choose a SaaS boilerplate
A practical checklist for picking a starter kit you will not regret three months in.
Guides1 min read
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