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base-miniapp-developer

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Build or migrate React/Next.js apps into Base/Coinbase Wallet Mini Apps using MiniKit + OnchainKit, while keeping thirdweb as the primary wallet/onboarding/payment integration; manage farcaster.json manifests, readiness, and gasless transactions.

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Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/data/base-miniapp-developer/SKILL.md

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Base Mini App Developer

Trigger

Use when the user needs to build, migrate, or troubleshoot Base Mini Apps, Coinbase Wallet Mini Apps, MiniKit, OnchainKit, Farcaster Mini Apps/Frames, or farcaster.json manifests; or when gasless Base transactions with Paymaster/Bundler are required.

Guardrails

  • Keep thirdweb as the primary wallet/onboarding/payment layer unless the user requests otherwise.
  • No email/password auth. Wallet connection is the session.
  • Do not use window.ethereum or window.location/window.open.
  • MiniKit/OnchainKit hooks must be in client components ('use client').
  • Manifest must be reachable at https://<domain>/.well-known/farcaster.json over HTTPS.
  • Call setFrameReady() once the UI is ready.

Default conversion workflow (React/Next.js)

  1. Identify router (App Router vs Pages) and where providers live.
  2. Keep the existing thirdweb provider and add OnchainKitProvider with miniKit.enabled; import OnchainKit CSS.
  3. Add a small FrameReady component to call setFrameReady() after mount.
  4. Create and sign farcaster.json, then redeploy.
  5. Keep thirdweb wallet/onboarding UI; only use OnchainKit UI components that do not replace wallet UX.
  6. Replace external links with useOpenUrl() or MiniKit actions.
  7. Add gasless tx flow (thirdweb AA/paymaster or OnchainKit Transaction + Paymaster).
  8. Validate in Base Build Preview and test on device.

Provider guidance

  • Preferred Mini App context: OnchainKitProvider (@coinbase/onchainkit) with miniKit={{ enabled: true }}.
  • Keep the thirdweb provider intact; make sure its connectors do not rely on injected window.ethereum.
  • If the app already uses @coinbase/minikit-react, keep it unless asked to migrate.

Thirdweb-first guidance

  • Use thirdweb for onboarding and payments; do not replace with OnchainKit Wallet/Identity components unless requested.
  • Prefer thirdweb connectors that work in a WebView (no injected provider assumption).
  • Keep thirdweb chain config set to Base and reuse existing contract hooks/components.

When the user says "convert this app"

  • Install deps: @coinbase/onchainkit, viem, plus @coinbase/minikit-react only if needed.
  • Keep existing thirdweb setup (providers, hooks, UI).
  • Add manifest and placeholder assets; remind user to update domain and re-sign.
  • Wire providers and readiness.
  • Audit for window.ethereum/window.location usage and replace.

References

  • Manifest schema + signing: references/manifest.md
  • Providers + readiness: references/provider.md
  • MiniKit context & safety: references/minikit.md
  • Navigation & social actions: references/navigation.md
  • OnchainKit UI components: references/onchainkit-components.md
  • Paymaster & gasless tx: references/paymaster.md
  • thirdweb integration notes: references/thirdweb.md