open-swe/ui/vercel.json
Adam Moussa c75e76c05e
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fix(ui): drive Vercel dashboard-API proxy through Nitro routeRules (#76)
The Vercel deploy 404'd at `/` because PR #75's `vercel-build` script
(`scripts/build-vercel-output.mjs`) ran `rm -rf .vercel/output` and rebuilt
it from `.output/public`. On Vercel CI, Nitro's Vercel preset auto-activates
(from the VERCEL env var) and emits the Build Output API layout to
`.vercel/output` itself during `vite build`; the script then clobbered that
correct output with a static-only config that could not resolve the SPA
`_shell.html` fallback or the server functions, so production returned
`404: NOT_FOUND` even though the build was READY.

Stop fighting Nitro and drive the proxy through it instead:

- Remove `scripts/build-vercel-output.mjs` and the `vercel-build` script;
  restore the plain `vite build` for both local and Vercel builds.
- Add an env-driven Nitro `routeRules` proxy in `vite.config.ts`. Nitro's
  Vercel preset compiles a plain external-URL `proxy` rule into a CDN-level
  rewrite in `.vercel/output/config.json` at build time, reading
  LANGGRAPH_BACKEND_URL (the per-project Vercel env var). Proxy, not redirect,
  so the osw_session cookie stays first-party (same-origin). The build fails
  loudly if LANGGRAPH_BACKEND_URL is missing on Vercel; the rule is omitted
  for plain local/off-Vercel builds (which use the E2E_HARNESS mock proxy).
- `vercel.json`: `buildCommand` back to `bun run build`; drop the
  `.output/public` outputDirectory so Vercel serves Nitro's `.vercel/output`.

Validated with `LANGGRAPH_BACKEND_URL=... NITRO_PRESET=vercel bun run build`:
the generated `.vercel/output/config.json` contains the
`/dashboard/api/(.*)` -> backend rewrite ahead of `handle: filesystem` and
the SPA catch-all, `_shell.html` and the 699 hashed assets are emitted, and
typecheck passes. Supersedes the broken approach in #75.
2026-06-30 12:06:32 -04:00

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JSON

{
"$schema": "https://openapi.vercel.sh/vercel.json",
"framework": null,
"buildCommand": "bun run build"
}