ci: add changelog verification workflow #10

	# This action requires that any PR targeting the main branch should touch at
	# least one CHANGELOG file. If a CHANGELOG entry is not required, add the
	# "Skip Changelog" label, the "dependencies" label, or include "[chore]" in
	# the PR title.

	name: changelog

	on:
	pull_request:
	types: [opened, synchronize, reopened, labeled, unlabeled]
	branches:
	- main

	permissions: read-all

	jobs:
	changelog:
	runs-on: ubuntu-latest

	# Skip if:
	# - PR has "Skip Changelog" label
	# - PR has "dependencies" label
	# - PR title contains "[chore]"
	if: >
	! contains(github.event.pull_request.labels.*.name, 'Skip Changelog') &&
	! contains(github.event.pull_request.labels.*.name, 'dependencies') &&
	! contains(github.event.pull_request.title, '[chore]')

	steps:
	- name: Checkout repository
	uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
	with:
	fetch-depth: 0

	- name: Verify CHANGELOG updated
	run: \|
	echo "Fetching base branch..."
	git fetch origin ${{ github.base_ref }} --depth=1

	echo "Checking for CHANGELOG modifications..."
	if git diff --name-only FETCH_HEAD \| grep -q 'CHANGELOG'; then
	echo "CHANGELOG updated — OK"
	else
	echo "::error::No CHANGELOG file was updated in this PR."
	echo "Please update CHANGELOG or use the 'Skip Changelog' label if appropriate."
	false
	fi

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