Incoming Invoice GPT Update

backend/src/utils/gpt.ts

@@ -91,7 +91,8 @@ const InstructionFormat = z.object({
 export const getInvoiceDataFromGPT = async function (
     server: FastifyInstance,
     file: any,
-    tenantId: number
+    tenantId: number,
+    learningContext?: string
 ) {
     await initOpenAi();
 
@@ -188,8 +189,13 @@ export const getInvoiceDataFromGPT = async function (
                     "You extract structured invoice data.\n\n" +
                     `VENDORS: ${JSON.stringify(vendorList)}\n` +
                     `ACCOUNTS: ${JSON.stringify(accountList)}\n\n` +
+                    (learningContext
+                        ? `HISTORICAL_PATTERNS: ${learningContext}\n\n`
+                        : "") +
                     "Match issuer by name to vendor.id.\n" +
                     "Match invoice items to account id based on label/number.\n" +
+                    "Use historical patterns as soft hints for vendor/account/payment mapping.\n" +
+                    "Do not invent values when the invoice text contradicts the hints.\n" +
                     "Convert dates to YYYY-MM-DD.\n" +
                     "Keep invoice items in original order.\n",
             },