feat: use FactExtractor

src/conversation.ts

@@ -30,16 +30,6 @@ export function conversationInstruction(): string {
   ].join("\n");
 }
 
-export function memoryExtractionInstruction(now: string): string {
-  return [
-    `Current objective time: ${now}.`,
-    "Read the message history and extract durable facts worth remembering.",
-    "Objectivize subjective statements before storage.",
-    'Example: "I started TypeScript in 2025" becomes "The user started TypeScript in 2025."',
-    "Prefer facts about the persona, the user, their relationship, preferences, history, schedule-relevant events, and stable traits.",
-  ].join("\n");
-}
-
 export async function buildMandatoryConversationContext(input: {
   persona: MemorySpace;
   now: DateTimeInput;