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Guard Unassigned PRs #1

	name: Guard Unassigned PRs

	on:
	pull_request_target:
	types: [opened]

	jobs:
	check-assignee:
	runs-on: ubuntu-latest
	permissions:
	pull-requests: write
	issues: read
	steps:
	- uses: actions/github-script@v7
	with:
	script: \|
	const { owner, repo, number } = context.issue;
	const pr = context.payload.pull_request;
	const author = pr.user.login;

	// Extract linked issue number (e.g., "Closes #12" or "Fixes #5")
	const match = pr.body?.match(/(?:fixes\|closes\|resolves)\s+#(\d+)/i);

	if (!match) {
	await github.rest.issues.createComment({
	owner, repo, issue_number: number,
	body: `Hi @${author}! Please reference an issue in your PR body (e.g., \`Closes #12\`) and make sure it is assigned to you.`
	});
	await github.rest.pulls.update({ owner, repo, pull_number: number, state: 'closed' });
	return;
	}

	const issueNum = parseInt(match[1]);
	const issue = await github.rest.issues.get({ owner, repo, issue_number: issueNum });
	const isAssigned = issue.data.assignees.some(a => a.login === author);

	if (!isAssigned) {
	await github.rest.issues.createComment({
	owner, repo, issue_number: number,
	body: `Hi @${author}! This PR was automatically closed because Issue #${issueNum} is not assigned to you. Please comment on the issue to claim it first!`
	});
	await github.rest.pulls.update({ owner, repo, pull_number: number, state: 'closed' });
	}