{
	"version": 2,
	"id": "D17",
	"kind": "synthetic-chat",
	"origin": "synthetic",
	"actors": [
		"El",
		"Max",
		"Jo"
	],
	"initialDocument": "",
	"steps": [
		{
			"id": "m1",
			"kind": "say",
			"actor": "El",
			"text": "two workers can update the same draft revision. who wins?",
			"to": "room"
		},
		{
			"id": "m2",
			"kind": "say",
			"actor": "Max",
			"text": "choices I see: last write wins; reject stale revisions with compare-and-swap and no per-draft lock; or serialise writers with an advisory lock plus a revision check.",
			"to": "room"
		},
		{
			"id": "m3",
			"kind": "say",
			"actor": "El",
			"text": "last-write-wins would quietly lose a paragraph.",
			"to": "room"
		},
		{
			"id": "m4",
			"kind": "say",
			"actor": "Jo",
			"text": "advisory lock protects the transaction but we'd still need a version check after a crash, right?",
			"to": "room"
		},
		{
			"id": "c4",
			"kind": "checkpoint",
			"waitFor": "settled",
			"deadlineMs": 30000
		},
		{
			"id": "m5",
			"kind": "say",
			"actor": "Max",
			"text": "I'd use compare-and-swap on the revision, no per-draft lock, and return a conflict to the loser.",
			"to": "room"
		},
		{
			"id": "c5",
			"kind": "checkpoint",
			"waitFor": "settled",
			"deadlineMs": 30000
		},
		{
			"id": "m6",
			"kind": "say",
			"actor": "Jo",
			"text": "same. the client can rebase and try again.",
			"to": "room"
		},
		{
			"id": "c6",
			"kind": "checkpoint",
			"waitFor": "settled",
			"deadlineMs": 30000
		}
	]
}