const session = new OpenAIResponsesCompactionSession({
	client: openai,
	model: 'gpt-5.4',
	underlyingSession: new MemorySession(),
	shouldTriggerCompaction: ({ compactionCandidateItems }) => {
		return compactionCandidateItems.length >= 2;
	}
});
const content = [
	{type: 'input_text', text: 'analyse these images'},
	{type: 'input_image', image: `data:image/jpeg;base64,${Buffer.from(datafile).toString('base64')}`},
];
const history = [
	{role: 'user', content},
	{role: 'assistant', content: [{type: 'output_text', text: 'how can I help?'}]},
];
const prompt = [{role: 'user', content: [{type: 'input_text', text: 'analyse these images'}]}];

await session.addItems(history);
await session.runCompaction();

const agent = new Agent({name: 'agent', model: 'gpt-5.4', modelSettings: {store: false}});
const res = await run(agent, prompt, {session});