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Merge Queue Cleanup #911

	# Copyright (c) ByteDance Ltd. and/or its affiliates.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.

	name: Merge Queue Cleanup

	on:
	schedule:
	- cron: '/5 * * *'
	workflow_dispatch:
	inputs:
	mode:
	description: Report stale runs or cancel them
	required: true
	type: choice
	default: report
	options:
	- report
	- cancel

	concurrency:
	group: merge-queue-cleanup
	cancel-in-progress: false

	permissions:
	actions: write
	contents: read

	jobs:
	cleanup:
	runs-on: ubuntu-latest
	timeout-minutes: 10
	steps:
	- name: Checkout code
	uses: actions/checkout@v6
	- name: Reconcile stale merge-group runs
	env:
	GITHUB_TOKEN: ${{ github.token }}
	# Scheduled cleanup is report-only until the repository variable is
	# explicitly changed to "cancel" after observing dry-run results.
	CLEANUP_MODE: >-
	${{ github.event_name == 'schedule' &&
	(vars.MERGE_QUEUE_CLEANUP_MODE \|\| 'report') \|\| inputs.mode }}
	run: \|
	python3 .github/scripts/merge_queue_ci.py cleanup \
	--base-branch main \
	--grace-seconds 600 \
	--mode "${CLEANUP_MODE}"