Reusable application blocks

Scaffold common auth and payment building blocks with stack notes.

arka blocks list
arka blocks show auth_login
arka blocks show payments_stripe
arka blocks use auth_signup --stack "Next.js + Auth.js" --out components/signup.tsx
arka blocks create "create a crypto wallet page and save it as a block"

Available blocks include login, sign-up, password reset, OAuth, email verification, Stripe checkout/subscriptions, PayPal, and webhook receivers. Every block lists compatible technology stacks and security/implementation notes. Generated files are intentionally small and inspectable; existing files are never overwritten unless --force is supplied. These are starters, not production-ready auth or payment systems: add server validation, tests, secret management, webhooks, and provider-specific configuration before shipping. Generated output now includes production-readiness gates and required environment variables; implement and verify every gate before deployment. Arka does not mark a scaffold production ready merely because it was generated.

Natural language works: “show reusable login blocks” or “list available app blocks.” Arka can also turn a requested page/component into a reusable block spec, for example: “create a crypto wallet page and save it as a block.”

Web3 blocks are also available:

arka blocks show web3_wallet
arka blocks show web3_sign_in
arka blocks use web3_token_transfer --stack "Next.js + viem" --out web3/transfer.md

They include chain and contract allowlists, nonce-bound signature verification, transaction simulation, receipt checks, and explicit production-readiness gates.