{
	"description": "Smallest possible: blocks + latest-user-ask anchor.",
	"discarded": [
		{ "role": "user", "text": "How do I list files?" },
		{ "role": "assistant", "text": "Use `ls` or the `find` tool." }
	],
	"kept_tail": [{ "role": "user", "text": "Now show me the largest files." }]
}