chore: Loosen langchain peer dependency, use relevantFacts when compo…

…sing memory string

package.json

@@ -1,6 +1,6 @@
 {
     "name": "@getzep/zep-cloud",
-    "version": "1.0.11",
+    "version": "1.0.12",
     "private": false,
     "repository": "https://github.com/getzep/zep-js",
     "description": "Zep: Fast, scalable building blocks for production LLM apps",
@@ -20,8 +20,8 @@
         "zod": "^3.23.8"
     },
     "peerDependencies": {
-        "@langchain/core": ">=0.1.29 <0.3.0",
-        "langchain": ">=0.1.19 <0.3.0"
+        "@langchain/core": ">=0.1.29 <0.4.0",
+        "langchain": ">=0.1.19 <0.4.0"
     },
     "peerDependenciesMeta": {
         "langchain": {
@@ -33,14 +33,15 @@
     },
     "devDependencies": {
         "@faker-js/faker": "^8.4.1",
-        "@langchain/openai": "0.0.28",
+        "@langchain/core": "^0.3.7",
+        "@langchain/openai": "0.3.5",
         "@types/jest": "^29.5.12",
         "@types/node": "17.0.33",
         "@types/node-fetch": "2.6.9",
         "@types/qs": "6.9.8",
         "@types/url-join": "4.0.1",
         "jest": "^29.7.0",
-        "langchain": "0.1.19",
+        "langchain": "0.3.2",
         "nock": "^13.5.4",
         "prettier": "2.7.1",
         "ts-jest": "^29.1.4",

src/langchain/utils.ts

@@ -21,8 +21,9 @@ export const getZepMessageRoleType = (role: MessageType): RoleType => {
 export const condenseZepMemoryIntoHumanMessage = (memory: Memory) => {
     let systemPrompt = "";
 
-    if (memory.facts) {
-        systemPrompt += memory.facts.join("\n");
+    if (memory.relevantFacts) {
+        const relevantFactStrings: string[] = memory.relevantFacts.map(({fact}) => fact).filter(x => !!x) as string[];
+        systemPrompt += relevantFactStrings.join("\n");
     }
 
     // Extract summary, if present, and messages