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Harden cloud state sync

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Theodore Song
2026-07-12 15:37:23 -04:00
parent 5bd1f0779f
commit 2ca3473bac
2 changed files with 53 additions and 15 deletions
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api/state.js
+15 -3
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@@ -19,6 +19,10 @@ function agentStateFromItems(items) {
}
}
function conflictResponse(res, error, current) {
return res.status(409).json({ ok: false, error, state: current });
}
export default async function handler(req, res) {
res.setHeader("Cache-Control", "no-store");
try {
@@ -38,11 +42,19 @@ export default async function handler(req, res) {
const current = await readJsonBlob();
const currentAgents = agentStateFromItems(current && current.items);
const incomingAgents = agentStateFromItems(body.items);
if (!body.force && currentAgents && incomingAgents) {
const sameHour = currentAgents.last_cycle_hour && currentAgents.last_cycle_hour === incomingAgents.last_cycle_hour;
if (!body.force && currentAgents) {
const currentHour = currentAgents.last_cycle_hour || "";
const incomingHour = incomingAgents && incomingAgents.last_cycle_hour ? incomingAgents.last_cycle_hour : "";
if (currentHour && (!incomingAgents || !incomingHour)) {
return conflictResponse(res, "Cloud already has a cycle result; refusing unscheduled local state", current);
}
if (currentHour && incomingHour && incomingHour < currentHour) {
return conflictResponse(res, "Incoming state is older than the shared cloud result", current);
}
const sameHour = currentHour && currentHour === incomingHour;
const differentRun = currentAgents.last_run && incomingAgents.last_run && currentAgents.last_run !== incomingAgents.last_run;
if (sameHour && differentRun) {
return res.status(409).json({ ok: false, error: "This cycle hour already has a cloud result", state: current });
return conflictResponse(res, "This cycle hour already has a cloud result", current);
}
}
const state = { version: 1, updated_at: new Date().toISOString(), items: body.items };