feat: custom tag names via `type[@mel.tag "foo"] t = ..` #2728

	name: Opam Pipeline

	on:
	pull_request:
	push:
	branches:
	- main
	schedule:
	# Prime the caches every Monday
	- cron: 0 1 * * MON

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	build:
	name: Build and test

	strategy:
	fail-fast: false
	matrix:
	os:
	- macos-latest
	- ubuntu-latest
	# - windows-latest # for some reason windows build is not picking dune 3.5
	ocaml-compiler:
	- ocaml-base-compiler.5.3.0~alpha1

	runs-on: ${{ matrix.os }}

	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	submodules: 'recursive'
	path: melange

	- name: Use Node
	uses: actions/setup-node@v4
	with:
	node-version: 21

	- name: Install Homebrew dependencies
	if: ${{ matrix.os == 'macos-latest' }}
	run: \|
	env HOMEBREW_NO_AUTO_UPDATE=1 brew install tree

	- name: Use OCaml ${{ matrix.ocaml-compiler }}
	uses: ocaml/setup-ocaml@v3
	with:
	ocaml-compiler: ${{ matrix.ocaml-compiler }}

	- name: Install dependencies
	working-directory: melange
	run: \|
	opam update
	make opam-install-test

	- name: Clone melange-opam-template
	run: \|
	git clone https://github.com/melange-re/melange-opam-template.git
	cd melange-opam-template

	- name: Install all deps
	working-directory: melange-opam-template
	run: \|
	opam install -y reason-react
	npm install

	- name: Build basic template
	working-directory: melange-opam-template
	run: \|
	opam exec -- dune build @react @node --profile=release --display=short
	npm run bundle

	- name: Run resulting .js files
	working-directory: melange-opam-template
	run: \|
	node ./_build/default/src/node/src/Hello.mjs

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