feat(a2a): add A2AAgent class as an implementation of the agent interface for remote A2A protocol based agents #165

	name: PR Size Labeler

	on:
	pull_request_target:
	branches: main

	jobs:
	label-size:
	runs-on: ubuntu-latest
	permissions:
	pull-requests: write
	issues: write
	steps:
	- name: Calculate PR size and apply label
	uses: actions/github-script@v8
	with:
	script: \|
	const pr = context.payload.pull_request;
	const totalChanges = pr.additions + pr.deletions;

	// Remove existing size labels
	const labels = await github.rest.issues.listLabelsOnIssue({
	owner: context.repo.owner,
	repo: context.repo.repo,
	issue_number: context.payload.pull_request.number
	});

	for (const label of labels.data) {
	if (label.name.startsWith('size/')) {
	await github.rest.issues.removeLabel({
	owner: context.repo.owner,
	repo: context.repo.repo,
	issue_number: context.payload.pull_request.number,
	name: label.name
	});
	}
	}

	// Determine and apply new size label
	let sizeLabel;
	if (totalChanges <= 20) sizeLabel = 'size/xs';
	else if (totalChanges <= 100) sizeLabel = 'size/s';
	else if (totalChanges <= 500) sizeLabel = 'size/m';
	else if (totalChanges <= 1000) sizeLabel = 'size/l';
	else {
	sizeLabel = 'size/xl';
	}

	await github.rest.issues.addLabels({
	owner: context.repo.owner,
	repo: context.repo.repo,
	issue_number: context.payload.pull_request.number,
	labels: [sizeLabel]
	});

	if (sizeLabel === 'size/xl') {
	core.setFailed(`PR is too large (${totalChanges} lines). Please split into smaller PRs.`);
	}

Provide feedback