fix: add user context to search reranking

apps/webapp/app/services/search.server.ts

@@ -68,6 +68,7 @@ export class SearchService {
     // 2. Apply reranking strategy
     const rankedStatements = await this.rerankResults(
       query,
+      userId,
       { bm25: bm25Results, vector: vectorResults, bfs: bfsResults },
       opts,
     );
@@ -223,6 +224,7 @@ export class SearchService {
    */
   private async rerankResults(
     query: string,
+    userId: string,
     results: {
       bm25: StatementNode[];
       vector: StatementNode[];
@@ -230,8 +232,15 @@ export class SearchService {
     },
     options: Required<SearchOptions>,
   ): Promise<StatementNode[]> {
+    // Fetch user profile for context
+    const user = await prisma.user.findUnique({
+      where: { id: userId },
+      select: { name: true, id: true },
+    });
 
-    return applyLLMReranking(query, results,);
+    const userContext = user ? { name: user.name ?? undefined, userId: user.id } : undefined;
+
+    return applyLLMReranking(query, results, 10, userContext);
   }
 
   private async logRecallAsync(

apps/webapp/app/services/search/rerank.ts

@@ -454,6 +454,7 @@ export async function applyLLMReranking(
     bfs: StatementNode[];
   },
   limit: number = 10,
+  userContext?: { name?: string; userId: string },
 ): Promise<StatementNode[]> {
   const allResults = [
     ...results.bm25.slice(0, 100),
@@ -469,8 +470,16 @@ export async function applyLLMReranking(
   }
 
 
-  const prompt = `You are a relevance filter. Given a user query and a list of facts, identify ONLY the facts that are truly relevant to answering the query.
+  // Build user context section if provided
+  const userContextSection = userContext?.name
+    ? `\nUser Identity Context:
+- The user's name is "${userContext.name}"
+- References to "user", "${userContext.name}", or pronouns like "my/their" refer to the same person
+- When matching queries about "user's X" or "${userContext.name}'s X", these are equivalent\n`
+    : '';
 
+  const prompt = `You are a relevance filter. Given a user query and a list of facts, identify ONLY the facts that are truly relevant to answering the query.
+${userContextSection}
 Query: "${query}"
 
 Facts:
@@ -480,6 +489,7 @@ Instructions:
 - A fact is RELEVANT if it directly answers or provides information needed to answer the query
 - A fact is NOT RELEVANT if it's tangentially related but doesn't answer the query
 - Consider semantic meaning, not just keyword matching
+${userContext?.name ? `- Remember: "user", "${userContext.name}", and possessive references ("my", "their") all refer to the same person` : ''}
 - Only return facts with HIGH relevance (≥80% confidence)
 - If you are not sure, return an empty array