chore(create-cedar-rsc-app): push to upstream remote if it exists in publish script

[lisa-assistant]

Problem

packages/create-cedar-rsc-app/publish.ts unconditionally runs git push --follow-tags, but it should first check whether an upstream remote is configured. If it is, it should push to upstream (the canonical repo) rather than origin (the fork).

The commented-out code makes the intent clear:

// TODO: Check if there is an upstream remote, if so, use that
// await `git push upstream --follow-tags`
await `git push --follow-tags`

A maintainer running this from a fork will push the version tag to their fork rather than the main repo.

Fix

Check the list of git remotes before pushing. If upstream is present, push to it; otherwise fall back to the current default.

const remotes = (await $`git remote`).stdout.trim().split('\n')
if (remotes.includes('upstream')) {
  await $`git push upstream --follow-tags`
} else {
  await $`git push --follow-tags`
}

Files to change

• packages/create-cedar-rsc-app/publish.ts — replace the unconditional git push with a remote-aware branch (lines 61–63)

[lisa-assistant]

Self-fix confidence: 9/10

The fix is mechanical: one git remote call, a string-array check, and a conditional push. The 1-point deduction is for not knowing the exact zx API ergonomics off the top of my head (e.g. whether stdout needs trimming before split), but that's a quick docs check — the logic is unambiguous.

[lisa-assistant]

Implementation Plan

Goal: Before the final git push in publish.ts, check whether an upstream remote exists. If it does, push to upstream (the canonical repo); otherwise fall back to the default remote.

---

File to change

packages/create-cedar-rsc-app/publish.ts — around lines 60–63

---

Current code

// TODO: Check if there is an upstream remote, if so, use that
// await `git push upstream --follow-tags`
await `git push --follow-tags`

Replacement

const remoteOutput = await `git remote`
const remotes = remoteOutput.stdout.trim().split('\n').filter(Boolean)

if (remotes.includes('upstream')) {
  await `git push upstream --follow-tags`
} else {
  await `git push --follow-tags`
}

$git remote` line once the replacement is in place.

[lisa-assistant]

Self-fix confidence: 9/10

Two lines of zx shell + a conditional: list remotes, check for 'upstream', branch on result. The zx .stdout API is the only thing to verify at implementation time. The 1-point deduction is for not having run the script locally to confirm the exact ProcessOutput shape (stdout vs toString()).