most starter kits
look like starter kits.
this one doesn't.

Next.js 16, Tailwind v4, and working Supabase auth (sign-up, magic link, protected routes, sign-out), wrapped in a design spine built to fail one test: could a generator produce this in one shot? If yes, it's not done. Pick the demo apart on the right. Every value on it comes from a real component sitting in src/components.

$15one time. unlimited personal and client projects.

17 files · 5 components · 830 lines · 0 extra deps

buy grain/kittry the auth flow

a tool bench

the accent is the only warm thing on the page

spineunchanged
one display face + mono, borders not shadows, motion that teaches. every material below shares this.
accent#e8a33d
radius2px
typemono, oversized

the tells this kit refuses to ship

never

◆
feature

lorem ipsum description

instead

featurewhat it actually does →
said in one true sentence, the way you'd describe it out loud.

what's inside

the spinesrc/app/globals.css
near-monochrome tokens, one accent, borders not shadows, a fixed film-grain overlay, motion that only plays where it teaches.
four materials, one componentsrc/lib/materials.ts
workshop, ledger, blueprint, darkroom. swap the row and every screen repaints. add a fifth for your own project in under a minute.
real auth, already runningsrc/lib/supabase + proxy.ts
magic-link sign-in, a protected /dashboard, a callback route, sign-out. Try it yourself: the sign-in link above runs this same code.
the primitivessrc/components
Rail replaces the card. LeaderRow replaces the label-value pair with dots doing the work padding used to. Button has no drop shadow.
built for an agent to extendnamed for what things do
Rail, LeaderRow, MaterialSwitcher: every primitive is named for its job, not for what a template calls it. Point Claude Code, Codex, or any other coding agent at this repo and it follows the existing pattern instead of inventing a new one next to it.

questions

do I get updates?

yes. new materials and fixes land in the same repo, pull them whenever.

can I use it for client work?

yes, one license covers unlimited personal and client projects.

do I need a Supabase account?

yes, a free one. the auth code is real, it just needs real credentials to talk to.

is the code mine to modify?

completely. no attribution required, no runtime license check.

refunds?

if the auth flow or material switcher doesn't do what the demo shows, email within 14 days.

17 files. 5 components. one design spine.

get grain/kit · $15