refactor(memory): fix naming, dead code, error handling and AgentID support

Normalize JSON tags to snake_case, remove dead fusion branches and unused
struct fields, add proper error logging for BM25 operations, wire AgentID
through filters/store/retrieval, and replace goto with structured control flow.

internal/memory/indexer.go

@@ -247,6 +247,6 @@ func sparseWeightsToVector(weights map[uint32]float32) ([]uint32, []float32) {
 
 func termHash(term string) uint32 {
 	hasher := fnv.New32a()
-	_, _ = hasher.Write([]byte(term))
+	hasher.Write([]byte(term)) //nolint:errcheck // hash.Write never returns error
 	return hasher.Sum32() & sparseDimMask
 }

internal/memory/llm_client.go

@@ -51,7 +51,7 @@ func (c *LLMClient) Extract(ctx context.Context, req ExtractRequest) (ExtractRes
 	if len(req.Messages) == 0 {
 		return ExtractResponse{}, fmt.Errorf("messages is required")
 	}
-	parsedMessages := parseMessages(formatMessages(req.Messages))
+	parsedMessages := strings.Join(formatMessages(req.Messages), "\n")
 	systemPrompt, userPrompt := getFactRetrievalMessages(parsedMessages)
 	content, err := c.callChat(ctx, []chatMessage{
 		{Role: "system", Content: systemPrompt},
@@ -122,7 +122,7 @@ func (c *LLMClient) Decide(ctx context.Context, req DecideRequest) (DecideRespon
 
 		actions = append(actions, DecisionAction{
 			Event:     event,
-			ID:        normalizeID(item["id"]),
+			ID:        asString(item["id"]),
 			Text:      text,
 			OldMemory: asString(item["old_memory"]),
 		})
@@ -242,14 +242,6 @@ func asString(value any) string {
 	}
 }
 
-func normalizeID(value any) string {
-	id := asString(value)
-	if id == "" {
-		return ""
-	}
-	return id
-}
-
 func normalizeMemoryItems(value any) []map[string]any {
 	switch typed := value.(type) {
 	case []any:

internal/memory/prompts.go

@@ -120,10 +120,6 @@ Before finalizing, verify the value is one of the allowed codes.`
 	return systemPrompt, userPrompt
 }
 
-func parseMessages(messages []string) string {
-	return strings.Join(messages, "\n")
-}
-
 func removeCodeBlocks(text string) string {
 	return strings.ReplaceAll(strings.ReplaceAll(text, "```json", ""), "```", "")
 }

internal/memory/qdrant_store.go

@@ -55,7 +55,7 @@ func NewQdrantStore(log *slog.Logger, baseURL, apiKey, collection string, dimens
 		collection = "memory"
 	}
 	if dimension <= 0 && strings.TrimSpace(sparseVectorName) == "" {
-		dimension = 1536
+		return nil, fmt.Errorf("embedding dimension is required")
 	}
 
 	cfg := &qdrant.Config{
@@ -455,9 +455,7 @@ func (s *QdrantStore) refreshCollectionSchema(ctx context.Context, vectors map[s
 				s.vectorNames[name] = int(vec.GetSize())
 			}
 		}
-		if len(vectors) == 0 {
-			goto sparseCheck
-		}
+		if len(vectors) > 0 {
 			for name, dim := range vectors {
 				if existing, ok := s.vectorNames[name]; ok && existing == dim {
 					continue
@@ -465,12 +463,11 @@ func (s *QdrantStore) refreshCollectionSchema(ctx context.Context, vectors map[s
 				return fmt.Errorf("collection missing vector %s (dim %d); migration required", name, dim)
 			}
 		}
-	if vectorsConfig == nil || vectorsConfig.GetParamsMap() == nil {
+	} else {
 		s.usesNamedVectors = false
 		s.vectorNames = nil
 	}
 
-sparseCheck:
 	sparseConfig := params.GetSparseVectorsConfig()
 	if s.sparseVectorName != "" {
 		needsUpdate := false
@@ -506,7 +503,7 @@ func (s *QdrantStore) ensurePayloadIndexes(ctx context.Context) error {
 	if s.client == nil {
 		return nil
 	}
-	fields := []string{"botId", "runId"}
+	fields := []string{"bot_id", "run_id"}
 	wait := true
 	for _, field := range fields {
 		_, err := s.client.CreateFieldIndex(ctx, &qdrant.CreateFieldIndexCollection{

internal/memory/service.go

@@ -6,7 +6,6 @@ import (
 	"encoding/hex"
 	"fmt"
 	"log/slog"
-	"math"
 	"sort"
 	"strings"
 	"time"
@@ -287,7 +286,7 @@ func (s *Service) EmbedUpsert(ctx context.Context, req EmbedUpsertRequest) (Embe
 	}
 
 	vectorName := ""
-	if s.store != nil && s.store.usesNamedVectors {
+	if s.store.usesNamedVectors {
 		vectorName = result.Model
 	}
 
@@ -336,19 +335,22 @@ func (s *Service) Update(ctx context.Context, req UpdateRequest) (MemoryItem, er
 	if existing == nil {
 		return MemoryItem{}, fmt.Errorf("memory not found")
 	}
-	if s.bm25 == nil {
-		return MemoryItem{}, fmt.Errorf("bm25 indexer not configured")
-	}
 
 	payload := existing.Payload
 	oldText := fmt.Sprint(payload["data"])
 	oldLang := fmt.Sprint(payload["lang"])
 	if oldLang == "" && strings.TrimSpace(oldText) != "" {
-		oldLang, _ = s.detectLanguage(ctx, oldText)
+		var detectErr error
+		oldLang, detectErr = s.detectLanguage(ctx, oldText)
+		if detectErr != nil {
+			s.logger.Warn("detect language failed for old text", slog.Any("error", detectErr))
+		}
 	}
 	if strings.TrimSpace(oldText) != "" && strings.TrimSpace(oldLang) != "" {
 		oldFreq, oldLen, err := s.bm25.TermFrequencies(oldLang, oldText)
-		if err == nil {
+		if err != nil {
+			s.logger.Warn("bm25 term frequencies failed", slog.String("lang", oldLang), slog.Any("error", err))
+		} else {
 			s.bm25.RemoveDocument(oldLang, oldFreq, oldLen)
 		}
 	}
@@ -365,7 +367,7 @@ func (s *Service) Update(ctx context.Context, req UpdateRequest) (MemoryItem, er
 
 	payload["data"] = req.Memory
 	payload["hash"] = hashMemory(req.Memory)
-	payload["updatedAt"] = time.Now().UTC().Format(time.RFC3339)
+	payload["updated_at"] = time.Now().UTC().Format(time.RFC3339)
 	payload["lang"] = newLang
 
 	embeddingEnabled := req.EmbeddingEnabled != nil && *req.EmbeddingEnabled
@@ -413,10 +415,13 @@ func (s *Service) GetAll(ctx context.Context, req GetAllRequest) (SearchResponse
 		filters[k] = v
 	}
 	if req.BotID != "" {
-		filters["botId"] = req.BotID
+		filters["bot_id"] = req.BotID
+	}
+	if req.AgentID != "" {
+		filters["agent_id"] = req.AgentID
 	}
 	if req.RunID != "" {
-		filters["runId"] = req.RunID
+		filters["run_id"] = req.RunID
 	}
 	if len(filters) == 0 {
 		return SearchResponse{}, fmt.Errorf("bot_id, agent_id or run_id is required")
@@ -449,10 +454,13 @@ func (s *Service) DeleteAll(ctx context.Context, req DeleteAllRequest) (DeleteRe
 		filters[k] = v
 	}
 	if req.BotID != "" {
-		filters["botId"] = req.BotID
+		filters["bot_id"] = req.BotID
+	}
+	if req.AgentID != "" {
+		filters["agent_id"] = req.AgentID
 	}
 	if req.RunID != "" {
-		filters["runId"] = req.RunID
+		filters["run_id"] = req.RunID
 	}
 	if len(filters) == 0 {
 		return DeleteResponse{}, fmt.Errorf("bot_id, agent_id or run_id is required")
@@ -487,6 +495,7 @@ func (s *Service) WarmupBM25(ctx context.Context, batchSize int) error {
 			}
 			termFreq, docLen, err := s.bm25.TermFrequencies(lang, text)
 			if err != nil {
+				s.logger.Warn("bm25 warmup: term frequencies failed", slog.String("id", point.ID), slog.Any("error", err))
 				continue
 			}
 			s.bm25.AddDocument(lang, termFreq, docLen)
@@ -609,11 +618,17 @@ func (s *Service) applyUpdate(ctx context.Context, id, text string, filters map[
 	oldText := fmt.Sprint(payload["data"])
 	oldLang := fmt.Sprint(payload["lang"])
 	if oldLang == "" && strings.TrimSpace(oldText) != "" {
-		oldLang, _ = s.detectLanguage(ctx, oldText)
+		var detectErr error
+		oldLang, detectErr = s.detectLanguage(ctx, oldText)
+		if detectErr != nil {
+			s.logger.Warn("detect language failed for old text", slog.Any("error", detectErr))
+		}
 	}
 	if strings.TrimSpace(oldText) != "" && strings.TrimSpace(oldLang) != "" {
 		oldFreq, oldLen, err := s.bm25.TermFrequencies(oldLang, oldText)
-		if err == nil {
+		if err != nil {
+			s.logger.Warn("bm25 term frequencies failed", slog.String("lang", oldLang), slog.Any("error", err))
+		} else {
 			s.bm25.RemoveDocument(oldLang, oldFreq, oldLen)
 		}
 	}
@@ -628,7 +643,7 @@ func (s *Service) applyUpdate(ctx context.Context, id, text string, filters map[
 	sparseIndices, sparseValues := s.bm25.AddDocument(newLang, newFreq, newLen)
 	payload["data"] = text
 	payload["hash"] = hashMemory(text)
-	payload["updatedAt"] = time.Now().UTC().Format(time.RFC3339)
+	payload["updated_at"] = time.Now().UTC().Format(time.RFC3339)
 	payload["lang"] = newLang
 	if metadata != nil {
 		payload["metadata"] = mergeMetadata(payload["metadata"], metadata)
@@ -676,11 +691,17 @@ func (s *Service) applyDelete(ctx context.Context, id string) (MemoryItem, error
 		oldText := fmt.Sprint(existing.Payload["data"])
 		oldLang := fmt.Sprint(existing.Payload["lang"])
 		if oldLang == "" && strings.TrimSpace(oldText) != "" {
-			oldLang, _ = s.detectLanguage(ctx, oldText)
+			var detectErr error
+			oldLang, detectErr = s.detectLanguage(ctx, oldText)
+			if detectErr != nil {
+				s.logger.Warn("detect language failed for old text", slog.Any("error", detectErr))
+			}
 		}
 		if strings.TrimSpace(oldText) != "" && strings.TrimSpace(oldLang) != "" {
 			oldFreq, oldLen, err := s.bm25.TermFrequencies(oldLang, oldText)
-			if err == nil {
+			if err != nil {
+				s.logger.Warn("bm25 term frequencies failed", slog.String("lang", oldLang), slog.Any("error", err))
+			} else {
 				s.bm25.RemoveDocument(oldLang, oldFreq, oldLen)
 			}
 		}
@@ -754,10 +775,13 @@ func buildFilters(req AddRequest) map[string]any {
 		filters[key] = value
 	}
 	if req.BotID != "" {
-		filters["botId"] = req.BotID
+		filters["bot_id"] = req.BotID
+	}
+	if req.AgentID != "" {
+		filters["agent_id"] = req.AgentID
 	}
 	if req.RunID != "" {
-		filters["runId"] = req.RunID
+		filters["run_id"] = req.RunID
 	}
 	return filters
 }
@@ -768,10 +792,13 @@ func buildSearchFilters(req SearchRequest) map[string]any {
 		filters[key] = value
 	}
 	if req.BotID != "" {
-		filters["botId"] = req.BotID
+		filters["bot_id"] = req.BotID
+	}
+	if req.AgentID != "" {
+		filters["agent_id"] = req.AgentID
 	}
 	if req.RunID != "" {
-		filters["runId"] = req.RunID
+		filters["run_id"] = req.RunID
 	}
 	return filters
 }
@@ -782,10 +809,13 @@ func buildEmbedFilters(req EmbedUpsertRequest) map[string]any {
 		filters[key] = value
 	}
 	if req.BotID != "" {
-		filters["botId"] = req.BotID
+		filters["bot_id"] = req.BotID
+	}
+	if req.AgentID != "" {
+		filters["agent_id"] = req.AgentID
 	}
 	if req.RunID != "" {
-		filters["runId"] = req.RunID
+		filters["run_id"] = req.RunID
 	}
 	return filters
 }
@@ -842,7 +872,7 @@ func buildPayload(text string, filters map[string]any, metadata map[string]any,
 	payload := map[string]any{
 		"data":       text,
 		"hash":       hashMemory(text),
-		"createdAt": createdAt,
+		"created_at": createdAt,
 	}
 	if metadata != nil {
 		payload["metadata"] = metadata
@@ -865,16 +895,19 @@ func payloadToMemoryItem(id string, payload map[string]any) MemoryItem {
 	if v, ok := payload["hash"].(string); ok {
 		item.Hash = v
 	}
-	if v, ok := payload["createdAt"].(string); ok {
+	if v, ok := payload["created_at"].(string); ok {
 		item.CreatedAt = v
 	}
-	if v, ok := payload["updatedAt"].(string); ok {
+	if v, ok := payload["updated_at"].(string); ok {
 		item.UpdatedAt = v
 	}
-	if v, ok := payload["botId"].(string); ok {
+	if v, ok := payload["bot_id"].(string); ok {
 		item.BotID = v
 	}
-	if v, ok := payload["runId"].(string); ok {
+	if v, ok := payload["agent_id"].(string); ok {
+		item.AgentID = v
+	}
+	if v, ok := payload["run_id"].(string); ok {
 		item.RunID = v
 	}
 	if meta, ok := payload["metadata"].(map[string]any); ok {
@@ -924,76 +957,33 @@ func mergeMetadata(base any, extra map[string]any) map[string]any {
 type rerankCandidate struct {
 	ID      string
 	Payload map[string]any
-	Score   float64
-	Source  string
-	Rank    int
 }
 
 const (
-	fusionModeRRF     = "rrf"
-	fusionModeCombMNZ = "combmnz"
-	fusionMode        = fusionModeRRF
 	rrfK = 60.0
 )
 
-func fuseByRankFusion(pointsBySource map[string][]qdrantPoint, scoresBySource map[string][]float64) []MemoryItem {
+func fuseByRankFusion(pointsBySource map[string][]qdrantPoint, _ map[string][]float64) []MemoryItem {
 	candidates := map[string]*rerankCandidate{}
 	rrfScores := map[string]float64{}
-	combScores := map[string]float64{}
-	combCounts := map[string]int{}
 
-	for source, points := range pointsBySource {
-		scores := scoresBySource[source]
-		minScore := math.MaxFloat64
-		maxScore := -math.MaxFloat64
+	for _, points := range pointsBySource {
 		for idx, point := range points {
-			if idx >= len(scores) {
-				continue
-			}
-			score := scores[idx]
-			if score < minScore {
-				minScore = score
-			}
-			if score > maxScore {
-				maxScore = score
-			}
 			if _, ok := candidates[point.ID]; !ok {
 				candidates[point.ID] = &rerankCandidate{
 					ID:      point.ID,
 					Payload: point.Payload,
 				}
 			}
-		}
-		if minScore == math.MaxFloat64 {
-			minScore = 0
-		}
-		if maxScore == -math.MaxFloat64 {
-			maxScore = minScore
-		}
-
-		for idx, point := range points {
-			if idx >= len(scores) {
-				continue
-			}
-			score := scores[idx]
 			rank := float64(idx + 1)
 			rrfScores[point.ID] += 1.0 / (rrfK + rank)
-
-			scoreNorm := normalizeScore(score, minScore, maxScore)
-			combScores[point.ID] += scoreNorm
-			combCounts[point.ID]++
 		}
 	}
 
 	items := make([]MemoryItem, 0, len(candidates))
 	for id, candidate := range candidates {
 		item := payloadToMemoryItem(candidate.ID, candidate.Payload)
-		switch fusionMode {
-		case fusionModeCombMNZ:
-			item.Score = combScores[id] * float64(combCounts[id])
-		default:
 		item.Score = rrfScores[id]
-		}
 		items = append(items, item)
 	}
 
@@ -1002,10 +992,3 @@ func fuseByRankFusion(pointsBySource map[string][]qdrantPoint, scoresBySource ma
 	})
 	return items
 }
-
-func normalizeScore(score, minScore, maxScore float64) float64 {
-	if maxScore <= minScore {
-		return 1
-	}
-	return (score - minScore) / (maxScore - minScore)
-}

internal/memory/types.go

@@ -88,13 +88,13 @@ type MemoryItem struct {
 	ID        string         `json:"id"`
 	Memory    string         `json:"memory"`
 	Hash      string         `json:"hash,omitempty"`
-	CreatedAt string         `json:"createdAt,omitempty"`
-	UpdatedAt string         `json:"updatedAt,omitempty"`
+	CreatedAt string         `json:"created_at,omitempty"`
+	UpdatedAt string         `json:"updated_at,omitempty"`
 	Score     float64        `json:"score,omitempty"`
 	Metadata  map[string]any `json:"metadata,omitempty"`
-	BotID     string         `json:"botId,omitempty"`
-	AgentID   string         `json:"agentId,omitempty"`
-	RunID     string         `json:"runId,omitempty"`
+	BotID     string         `json:"bot_id,omitempty"`
+	AgentID   string         `json:"agent_id,omitempty"`
+	RunID     string         `json:"run_id,omitempty"`
 }
 
 type SearchResponse struct {