Vite SSG + Vite+

[shyim]

Describe the bug

Vite SSG and Vite+ is broken right now as the includedRoutes are not passed down with vite-plus.

file:///Users/shyim/Developer/shopmon/frontend/node_modules/vite-ssg/dist/shared/vite-ssg.D5Fdxh1E.mjs:1427
  routesPaths = Array.from(new Set(routesPaths));
                           ^

TypeError: object is not iterable (cannot read property Symbol(Symbol.iterator))
    at new Set (<anonymous>)
    at build (file:///Users/shyim/Developer/shopmon/frontend/node_modules/vite-ssg/dist/shared/vite-ssg.D5Fdxh1E.mjs:1427:28)
    at async CAC.<anonymous> (file:///Users/shyim/Developer/shopmon/frontend/node_modules/vite-ssg/dist/node/cli.mjs:22:3)

Node.js v25.9.0

Reproduction

https://github.com/antfu-collective/vite-ssg/tree/main/examples

Steps to reproduce

• Clone example
• Convert to vite plus (vp migrate)
• Building crashes

System Info

VITE+ - The Unified Toolchain for the Web

Environment:
  Version  24.14.1
  Source   lts

Tool Paths:
  node  /Users/shyim/.vite-plus/js_runtime/node/24.14.1/bin/node
  npm   /Users/shyim/.vite-plus/js_runtime/node/24.14.1/bin/npm
  npx   /Users/shyim/.vite-plus/js_runtime/node/24.14.1/bin/npx

Used Package Manager

npm

Logs

Validations

• Read the Contributing Guidelines.
• Check that there isn't already an issue for the same bug.
• Confirm this is a Vite+ issue and not an upstream issue (Vite, Vitest, tsdown, Rolldown, or Oxc).
• The provided reproduction is a minimal reproducible example.