pre-push hook

Before a push, the hook says how many builds the push would start on projects that still deploy on push:

deploys: this push starts 2 build(s), auto-deploy is still on for:
  vercel  site  (production, branch main)
  render  api  (production, branch main)

The hook knows how each platform reacts to a push. Vercel, with Git connected, builds every branch you push: the production branch as production, any other branch as a preview. Render builds only the branch it is set to. A project counts when its repo is the remote you push to.

cp integrations/hooks/pre-push .git/hooks/pre-push && chmod +x .git/hooks/pre-push

Setting
(none)	Warn, then push.
`git config deploys.prepush.block true`	Stop the push when it would start builds. `git push --no-verify` goes anyway.
`git config deploys.prepush.skip true` or `DEPLOYS_PREPUSH=off`	Do not check.

If deploys or jq is missing, the remote is not on GitHub, or something fails, the push goes ahead without a word. The check reads both platforms (no GitHub calls), so expect a few seconds. After DEPLOYS_PREPUSH_TIMEOUT seconds (default 20) it gives up and lets the push go.