fix(memory-ruvector): address code review security and robustness issues

- Add Cypher injection protection: validate relationship type is alphanumeric
- Fix metadata type coercion: use nullish coalescing for optional fields
- Add pattern centroid validation: skip malformed patterns in boosting
- Add debug logging to silent catches for better troubleshooting

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

extensions/memory-ruvector/db.ts

@@ -283,15 +283,15 @@ export class RuvectorDatabase implements RuvectorDB {
       .map((r) => ({
         document: {
           id: r.id,
-          content: r.metadata.content as string,
+          content: (r.metadata.content as string | undefined) ?? "",
           vector: [], // Don't return vector to save memory
-          direction: r.metadata.direction as "inbound" | "outbound",
-          channel: r.metadata.channel as string,
+          direction: (r.metadata.direction as "inbound" | "outbound" | undefined) ?? "inbound",
+          channel: (r.metadata.channel as string | undefined) ?? "",
           user: r.metadata.user as string | undefined,
           conversationId: r.metadata.conversationId as string | undefined,
           sessionKey: r.metadata.sessionKey as string | undefined,
           agentId: r.metadata.agentId as string | undefined,
-          timestamp: r.metadata.timestamp as number,
+          timestamp: (r.metadata.timestamp as number | undefined) ?? Date.now(),
           metadata: r.metadata,
         },
         score: r.score,
@@ -457,6 +457,11 @@ export class RuvectorDatabase implements RuvectorDB {
       return this.findRelatedInMemory(id, relationship, depth);
     }
 
+    // Validate relationship to prevent Cypher injection (allow alphanumeric and underscore only)
+    if (relationship && !/^[A-Za-z_][A-Za-z0-9_]*$/.test(relationship)) {
+      throw new Error(`ruvector: invalid relationship type "${relationship}" - must be alphanumeric`);
+    }
+
     // Use Cypher to find related nodes with their properties
     const cypherQuery = relationship
       ? `MATCH (a)-[r:${relationship}*1..${depth}]->(b:Message) WHERE a.id = $id RETURN DISTINCT b`

extensions/memory-ruvector/index.ts

@@ -592,8 +592,10 @@ function registerLocalMode(api: ClawdbotPluginApi, config: RuvectorConfig): void
                       source: "graph",
                     });
                   }
-                } catch {
-                  // Skip graph expansion errors
+                } catch (err) {
+                  // Skip graph expansion errors but log for debugging
+                  const msg = err instanceof Error ? err.message : String(err);
+                  api.logger.debug?.(`ruvector_recall: graph expansion failed: ${msg}`);
                 }
               }
 
@@ -772,8 +774,10 @@ function registerLocalMode(api: ClawdbotPluginApi, config: RuvectorConfig): void
               try {
                 const created = await graphDb.linkMessages(id, targetId, "RELATED_TO");
                 if (created) edgesCreated++;
-              } catch {
-                // Skip failed edges
+              } catch (err) {
+                // Skip failed edges but log for debugging
+                const msg = err instanceof Error ? err.message : String(err);
+                api.logger.debug?.(`ruvector_learn: failed to create edge to ${targetId}: ${msg}`);
               }
             }
           }
@@ -1294,8 +1298,14 @@ function rerankWithPatterns(
     for (const pattern of similarPatterns) {
       // Pattern centroid contains [query, result], extract result portion
       const dim = queryVector.length;
+      // Validate centroid has expected structure before slicing
+      if (pattern.centroid.length < dim * 2) {
+        continue; // Skip malformed pattern
+      }
       const patternResultCentroid = pattern.centroid.slice(dim, dim * 2);
 
+      // result.document.vector is intentionally [] to save memory, so pattern boosting
+      // only works when vectors are available (e.g., from graph expansion with vectors)
       if (patternResultCentroid.length > 0 && result.document.vector.length > 0) {
         const similarity = cosineSimilarity(result.document.vector, patternResultCentroid);
         patternBoost += similarity * pattern.avgQuality * boostFactor;

extensions/memory-ruvector/tool.ts

@@ -603,8 +603,10 @@ export function createRuvectorRecallTool(options: CreateRuvectorRecallToolOption
                   relationship,
                 });
               }
-            } catch {
-              // Skip entries that can't be fetched
+            } catch (err) {
+              // Skip entries that can't be fetched but log for debugging
+              const errMsg = err instanceof Error ? err.message : String(err);
+              api.logger.debug?.(`ruvector_recall: failed to fetch graph entry ${id}: ${errMsg}`);
             }
           }