Upgrade to Ardo 4.0

Ardo 4.0 uses the breaking-release window to stabilize documentation URL identity. The main public change is the major-version URL contract: production documentation should live under a stable major folder such as /v3/ or /v4/, while / redirects to the current major version.

What Changes

• Major-versioned documentation URLs become the recommended public shape for deployed docs.
• Root index.html, versions.json, sitemap.xml, robots.txt, llms.txt, search assets, and redirect files are emitted as static build outputs.
• sitemap.xml advertises only the current canonical major version so older folders can stay reachable without being indexed as duplicate current content.
• GitHub Pages deployments should preserve older major folders when a new major version becomes current.

Update Versioned Docs

Configure the current major version in vite.config.ts:

import { defineConfig } from "vite"
import { ardo } from "ardo/vite"

export default defineConfig({
  plugins: [
    ardo({
      title: "My Docs",
      siteUrl: "https://docs.example.com",
      versioning: {
        current: "v4",
        versions: [
          { id: "v4", label: "4.x", path: "/v4/" },
          { id: "v3", label: "3.x", path: "/v3/" },
        ],
      },
    }),
  ],
})

Set the same basename in react-router.config.ts:

import type { Config } from "@react-router/dev/config"
import { withArdoVersioning } from "ardo/vite"

const config = {
  ssr: false,
  prerender: true,
} satisfies Config

export default withArdoVersioning(config, { basename: "/v4/" })

Preserve Older GitHub Pages Versions

GitHub Pages replaces the full uploaded artifact on each deploy. Before switching the current docs build to a new major folder, keep the final generated folder for the previous major version and copy it into the Pages artifact during deployment.

Keeping each older folder, for example as an archive in the repository, protects stable URLs such as /v3/... from being deleted by the first /v4/ deployment.

Check Existing Links

Update external documentation links to point at the versioned canonical URL:

https://docs.example.com/v4/guide/getting-started

Avoid making latest canonical. If a latest alias is added later, it should redirect to the current major-version folder.