retrieval fusion

packages/shared/src/config/constants.js

@@ -96,6 +96,12 @@ const ENTITIES = {
     ],
 }
 
+const RETRIEVAL = {
+    RRF_K:              60,     // Reciprocal Rank Fusion smoothing constant, softens rank-1 advantage, not exposed in settings
+    SEMANTIC_WEIGHT:    1.0,    // Weight applied to semantic (QDrant) results
+    KEYWORD_WEIGHT:     0,    // Weight applied to keyword (SQLite) results, 0 = disables, set >0 to enable and tune balance between semantic vs keyword matches
+}
+
 module.exports = {
     QDRANT,
     COLLECTIONS,
@@ -108,5 +114,6 @@ module.exports = {
     SQLITE,
     ORCHESTRATION,
     SUMMARIES,
-    ENTITIES
+    ENTITIES,
+    RETRIEVAL,
 };

packages/shared/src/index.js

@@ -1,5 +1,5 @@
 const {getEnv} = require('./config/env');
-const {QDRANT, COLLECTIONS, EPISODIC, SERVICES, OLLAMA, PORTS, LLAMACPP, INFERENCE_DEFAULTS, SQLITE, ORCHESTRATION, SUMMARIES, ENTITIES } = require('./config/constants');
+const {QDRANT, COLLECTIONS, EPISODIC, SERVICES, OLLAMA, PORTS, LLAMACPP, INFERENCE_DEFAULTS, SQLITE, ORCHESTRATION, SUMMARIES, ENTITIES, RETRIEVAL } = require('./config/constants');
 const {parseRow, formatEpisodeText} = require('./utils')
 const logger = require('./utils/logger');
 
@@ -20,4 +20,5 @@ module.exports = {
     SUMMARIES,
     ENTITIES,
     logger,
+    RETRIEVAL,
 };