Covers production env-var handling (read process.env per request, never at module scope — Cloudflare injects env at request time so module-level reads are undefined on the edge), plugin ordering (cloudflare() before tanstackStart()), matching start scripts to the build output, React 19 pinning for Bun, and prerendering limits (dynamic $id routes, layout _ routes, and component-less routes are skipped unless linked via crawlLinks).

Includes full vite.config.ts templates per adapter and a complete Cloudflare Workers deploy template, plus a production checklist.

Do NOT use this skill for app data/auth logic (see start-routing-data / start-auth) or for generic Vite config unrelated to Start.

TanStack Start — Deployment

Agent Workflow (MANDATORY)

Before ANY implementation, spawn in parallel:

1. fuse-ai-pilot:explore-codebase — read vite.config.ts, package.json scripts, existing adapter/wrangler config
2. fuse-ai-pilot:research-expert — verify adapter setup via Context7 /websites/tanstack_start_framework_react
3. mcp__context7__query-docs — confirm tanstackStart plugin + adapter options for the target host