Express
06 Persistence
Persist Express chat history through your app storage.
Express does not prescribe storage. Load existing messages before the run and store response.messages after success.
1. Load The Session
const session = await db.chatSession.findUnique({
where: { id: req.params.sessionId, userId: req.user.id },
include: { messages: { orderBy: { createdAt: "asc" } } },
});
if (!session) {
return res.status(404).json({ error: { code: "not_found" } });
}2. Send With History
const response = await supportAgent
.prompt(message)
.messages(session.messages.map((item) => item.message))
.send();3. Store New Messages
await db.chatMessage.createMany({
data: response.messages.map((message) => ({
sessionId: session.id,
message,
})),
});Keep persistence in your transaction boundary when the app needs message history and related business records to commit together.
4. Use Memory Deliberately
Use chat history for turn-by-turn continuity. Use Anvia memory when the model should recall durable facts across future sessions.
Next
Prepare runtime constraints in Deploy. Related guides: Memory, Memory and Sessions, and Agent History.