Submodule drift preview #13

	name: Sync submodules

	on:
	schedule:
	# Daily at 03:00 UTC (11:00 Beijing time)
	- cron: '0 3 * * *'
	workflow_dispatch:

	permissions:
	contents: write

	jobs:
	sync:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0
	token: ${{ secrets.GITHUB_TOKEN }}

	- name: Init first-level submodules (non-recursive)
	# Keep this workflow aligned with repo-audit.yml: only the five
	# top-level imports are maintained by this index. Some upstream imports
	# carry nested submodule gitlinks without matching .gitmodules entries.
	run: \|
	git submodule update --init --depth=1 \
	AER-skills \
	nature-skills \
	nature-paper-skills \
	claude-scholar \
	codex-claude-academic-skills

	- name: Update submodules to latest remote
	run: \|
	git submodule update --remote --merge \
	AER-skills \
	nature-skills \
	nature-paper-skills \
	claude-scholar \
	codex-claude-academic-skills
	git submodule status

	- name: Commit & push if changed
	run: \|
	git config user.name "github-actions[bot]"
	git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
	if git diff --quiet; then
	echo "No submodule updates."
	exit 0
	fi
	git add AER-skills nature-skills nature-paper-skills claude-scholar codex-claude-academic-skills
	git commit -m "chore: bump submodules to latest upstream"
	git push

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