Maintain full control and ability to modify generated code
All code generated by StackPatch lives in the user's repository as readable, fully editable files with no vendor lock-in, and changes are tracked in a manifest for safe reversion if needed.
StackPatch
StackPatch
Patch authentication into your Next.js app with one command
Overview
What it is
StackPatch is an open-source CLI that patches production-ready authentication directly into your codebase. Run one command and get Google & GitHub auth, protected routes, session management, Auth UI pages, and middleware & API routes all added as real files inside your repo -- No SaaS, No lock-in, no black box SDKs. Works with: Nextjs; React; Nuxt; Sveltekit; Astro
Intent
I need it when
Add production-ready authentication to an existing Next.js app quickly
StackPatch CLI auto-detects project structure and injects battle-tested auth code (Better Auth integration) directly into the app with zero configuration, supporting OAuth providers like Google and GitHub or email/password flows.
Integrate backend features without restructuring existing codebase
StackPatch scans folder structures and conventions, then applies smart code injection that respects existing patterns, allowing developers to add features like Auth, Redis, and Payments while maintaining code ownership and avoiding boilerplate.
Quickly scaffold a new Next.js project with pre-configured features
StackPatch provides a CLI command to create new projects from scratch and incrementally add production-ready features like authentication, eliminating manual setup and configuration overhead.
Drop
Not a fit when
- User needs a SaaS platform with managed hosting and vendor support
- Project uses non-Next.js frameworks or older versions without App Router
- User requires pre-built UI components or design system integration
- Organization needs commercial support contracts or SLAs
- Developer prefers low-code/no-code solutions without code ownership
Commercials
Pricing
Free open-source CLI tool