setup-dune-auth

Q: How do I install setup-dune-auth?

Run npx skills add https://github.com/cognitedata/dune-skills --skill setup-dune-auth in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/setup-dune-auth/ (personal) or .claude/skills/setup-dune-auth/ (project).

by cognitedataBackend & APIs

MUST be used when migrating an existing React app to Dune, or when no Dune auth is wired up. Detects classic vs Apps API flow from app.json infra field, installs the right packages, and wires up the entry file. No-op when a valid auth setup is already in place. Triggers: migrate to Dune, add Dune auth, DuneAuthProvider, AppSdkAuthProvider, connectToHostApp, useDune, Dune setup, setup auth, missing auth provider, CDF authentication, Fusion iframe auth.

Installs: 336
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Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/cognitedata/dune-skills --skill setup-dune-auth

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads setup-dune-auth automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Set Up Dune Authentication

Wire a React app for Dune auth so it can talk to CDF inside Fusion. Two flows exist; pick one based on app.json.

Pick the flow

Read app.json if present:

`app.json` `infra`	Flow	Auth source	Extra package
`"appsApi"`	Apps API (new Fusion app host)	`connectToHostApp` from `@cognite/app-sdk`	`@cognite/app-sdk`
missing / other	Classic (legacy Files API)	`DuneAuthProvider` + `useDune()` from `@cognite/dune`	—

No app.json? Ask the user. Default to Apps API — it's the default for npx @cognite/dune create.

Step 1 — Read state, decide whether to act

Read package.json, src/main.tsx (or src/index.tsx), vite.config.ts, app.json.

A valid setup already exists if any of these is true — in which case do nothing and report no-op:

Classic: <DuneAuthProvider> from @cognite/dune wraps <App /> in the entry file.
Apps API, generator pattern: connectToHostApp from @cognite/app-sdk is called inside App.tsx (or any component) and feeds the auth state into the rest of the app.
Apps API, wrapper pattern: <AppSdkAuthProvider> from @cognite/dune wraps <App /> in the entry file. (This is a valid alternative — same useDune() API as classic, less boilerplate. Don't try to "fix" it back to the generator default.)

Detect the package manager from the lock file (pnpm-lock.yaml → pnpm, yarn.lock → yarn, otherwise npm).

Step 2 — Install missing deps

Required for both flows:

Package	Type
`@cognite/dune`	runtime (provides Vite plugin even in Apps API mode)
`@cognite/sdk`	runtime
`@tanstack/react-query`	runtime
`vite-plugin-mkcert`	dev

Apps API only, also install:

Package	Type
`@cognite/app-sdk`	runtime

Skip anything already in package.json. Use the detected package manager (pnpm add, npm install, yarn add; -D / --save-dev for dev deps).

Step 3 — Vite config

vite.config.ts must contain:

import { fusionOpenPlugin } from "@cognite/dune/vite";
import mkcert from "vite-plugin-mkcert";

export default defineConfig({
  base: "./",
  plugins: [react(), mkcert(), fusionOpenPlugin(), /* ... */],
  server: { port: 3001 },
  worker: { format: "es" },
});

base: "./" — required for Fusion iframe deployment.
mkcert() — provides HTTPS for the dev server (the Fusion parent is HTTPS).
fusionOpenPlugin() — opens the dev URL inside Fusion automatically.
server.port: 3001 — convention; the plugin falls back to 3001 if no port is set.

Add only what's missing. Don't remove existing plugins.

Step 4 — Wire up the entry file and component

Classic flow

src/main.tsx:

import { DuneAuthProvider } from "@cognite/dune";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import React from "react";
import ReactDOM from "react-dom/client";
import App from "./App.tsx";

const queryClient = new QueryClient({
  defaultOptions: { queries: { staleTime: 5 * 60 * 1000, gcTime: 10 * 60 * 1000 } },
});

ReactDOM.createRoot(document.getElementById("root")!).render(
  <React.StrictMode>
    <QueryClientProvider client={queryClient}>
      <DuneAuthProvider>
        <App />
      </DuneAuthProvider>
    </QueryClientProvider>
  </React.StrictMode>
);

In components, use useDune():

import { useDune } from "@cognite/dune";

const { sdk, isLoading, error } = useDune();
// sdk is an authenticated CogniteClient

Apps API flow (generator default)

src/main.tsx does not wrap in any auth provider — auth is handled inside App.tsx:

import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import React from "react";
import ReactDOM from "react-dom/client";
import App from "./App.tsx";

const queryClient = new QueryClient({
  defaultOptions: { queries: { staleTime: 5 * 60 * 1000, gcTime: 10 * 60 * 1000 } },
});

ReactDOM.createRoot(document.getElementById("root")!).render(
  <React.StrictMode>
    <QueryClientProvider client={queryClient}>
      <App />
    </QueryClientProvider>
  </React.StrictMode>
);

src/App.tsx calls connectToHostApp from @cognite/app-sdk. The handshake is async, so render a loader until it resolves:

import { connectToHostApp } from "@cognite/app-sdk";
import { useEffect, useState } from "react";

function App() {
  const [project, setProject] = useState<string | null>(null);
  const [isLoading, setIsLoading] = useState(true);
  const [error, setError] = useState<string | undefined>();

  useEffect(() => {
    let cancelled = false;
    connectToHostApp({ applicationName: "<your-app-name>" })
      .then(async ({ api }) => {
        if (cancelled) return;
        setProject(await api.getProject());
      })
      .catch((err: unknown) => {
        if (cancelled) return;
        setError(err instanceof Error ? err.message : String(err));
      })
      .finally(() => {
        if (!cancelled) setIsLoading(false);
      });
    return () => { cancelled = true; };
  }, []);

  // render isLoading / error / authenticated UI
}

Use applicationName: appConfig.externalId (from app.json) so the host can identify the app.

Apps API flow — wrapper alternative

If the project already uses <AppSdkAuthProvider> from @cognite/dune, leave it. It wraps the same connectToHostApp handshake and gives a useDune() API identical to the classic flow. Both patterns are valid for Apps API mode.

Step 5 — Clean up superseded code

Remove only what's now redundant:

Custom CDF auth providers/hooks
Manual CogniteClient instantiation
OIDC/token-management code
CDF env vars (VITE_CDF_PROJECT, VITE_CDF_CLUSTER, etc.) — Dune/the host provide these

If unsure, leave it and flag to the user.

FAQ

What does the setup-dune-auth skill do?

How do I install setup-dune-auth?

Run npx skills add https://github.com/cognitedata/dune-skills --skill setup-dune-auth in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/setup-dune-auth/ (personal) or .claude/skills/setup-dune-auth/ (project).

Which AI agents can use setup-dune-auth?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is setup-dune-auth safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains setup-dune-auth?

It is published by cognitedata in cognitedata/dune-skills. It has 336 recorded installs.

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setup-dune-auth

Install

Install

Describe the task

Review the result

SKILL.md

Set Up Dune Authentication

Pick the flow

Step 1 — Read state, decide whether to act

Step 2 — Install missing deps

Step 3 — Vite config

Step 4 — Wire up the entry file and component

Classic flow

Apps API flow (generator default)

Apps API flow — wrapper alternative

Step 5 — Clean up superseded code

FAQ

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