fix: control plane UI fixes for recall and data view

hindsight-api-slim/hindsight_api/engine/search/reranking.py

@@ -153,6 +153,8 @@ async def rerank(self, query: str, candidates: list[MergedCandidate]) -> list[Sc
 
         # Normalize scores using sigmoid to [0, 1] range
         # Cross-encoder returns logits which can be negative
+        import math
+
         import numpy as np
 
         def sigmoid(x):
@@ -163,11 +165,20 @@ def sigmoid(x):
         # Create ScoredResult objects with cross-encoder scores
         scored_results = []
         for candidate, raw_score, norm_score in zip(candidates, scores, normalized_scores):
+            # Sanitize NaN scores (cross-encoder can return NaN for certain inputs).
+            # NaN propagates through all downstream scoring and Pydantic serializes
+            # NaN as JSON null, which breaks clients expecting numeric values.
+            raw = float(raw_score)
+            norm = float(norm_score)
+            if math.isnan(raw):
+                raw = 0.0
+            if math.isnan(norm):
+                norm = 0.0
             scored_result = ScoredResult(
                 candidate=candidate,
-                cross_encoder_score=float(raw_score),
-                cross_encoder_score_normalized=float(norm_score),
-                weight=float(norm_score),  # Initial weight is just cross-encoder score
+                cross_encoder_score=raw,
+                cross_encoder_score_normalized=norm,
+                weight=norm,  # Initial weight is just cross-encoder score
             )
             scored_results.append(scored_result)
 

hindsight-control-plane/src/components/data-view.tsx

@@ -227,29 +227,15 @@ export function DataView({ factType }: DataViewProps) {
   // Reset to first page when filters change
   useEffect(() => {
     setCurrentPage(1);
-  }, [searchQuery, tagFilters]);
-
-  // Debounce ref for text search
-  const searchDebounceRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+  }, [tagFilters]);
 
-  // Trigger server-side reload when text filter changes (debounced 300ms)
-  useEffect(() => {
-    if (searchDebounceRef.current) {
-      clearTimeout(searchDebounceRef.current);
+  // Trigger text search on Enter key
+  const executeSearch = () => {
+    if (currentBank) {
+      setCurrentPage(1);
+      loadData(undefined, searchQuery || undefined, tagFilters.length > 0 ? tagFilters : undefined);
     }
-    searchDebounceRef.current = setTimeout(() => {
-      if (currentBank) {
-        loadData(
-          undefined,
-          searchQuery || undefined,
-          tagFilters.length > 0 ? tagFilters : undefined
-        );
-      }
-    }, 300);
-    return () => {
-      if (searchDebounceRef.current) clearTimeout(searchDebounceRef.current);
-    };
-  }, [searchQuery]);
+  };
 
   // Trigger server-side reload immediately when tag filters change
   useEffect(() => {
@@ -292,12 +278,22 @@ export function DataView({ factType }: DataViewProps) {
             <div className="flex items-center gap-2">
               {/* Text search */}
               <div className="relative max-w-xs flex-1">
-                <Search className="absolute left-2.5 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground pointer-events-none" />
+                {loading ? (
+                  <RefreshCw className="absolute left-2.5 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground pointer-events-none animate-spin" />
+                ) : (
+                  <Search className="absolute left-2.5 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground pointer-events-none" />
+                )}
                 <Input
                   type="text"
                   value={searchQuery}
                   onChange={(e) => setSearchQuery(e.target.value)}
-                  placeholder="Filter by text or context..."
+                  onKeyDown={(e) => {
+                    if (e.key === "Enter") {
+                      e.preventDefault();
+                      executeSearch();
+                    }
+                  }}
+                  placeholder="Filter by text or context (press Enter)..."
                   className="pl-8 h-9"
                 />
               </div>
@@ -356,7 +352,11 @@ export function DataView({ factType }: DataViewProps) {
                       onClick={() => {
                         const newLimit = Math.min(data.total_units, fetchLimit + 1000);
                         setFetchLimit(newLimit);
-                        loadData(newLimit);
+                        loadData(
+                          newLimit,
+                          searchQuery || undefined,
+                          tagFilters.length > 0 ? tagFilters : undefined
+                        );
                       }}
                       className="ml-2 text-primary hover:underline"
                     >

hindsight-control-plane/src/components/search-debug-view.tsx

@@ -411,7 +411,7 @@ export function SearchDebugView() {
                               </div>
                             </div>
                             <div className="flex-shrink-0 text-right">
-                              <div className="text-sm font-semibold">{score.toFixed(3)}</div>
+                              <div className="text-sm font-semibold">{(score ?? 0).toFixed(3)}</div>
                               <div className="text-xs text-muted-foreground">score</div>
                             </div>
                             <ChevronRight className="h-5 w-5 text-muted-foreground flex-shrink-0" />

skills/hindsight-docs/references/developer/configuration.md

@@ -160,7 +160,7 @@ To switch between backends:
 
 | Variable | Description | Default |
 |----------|-------------|---------|
-| `HINDSIGHT_API_LLM_PROVIDER` | Provider: `openai`, `openai-codex`, `claude-code`, `anthropic`, `gemini`, `groq`, `minimax`, `ollama`, `lmstudio`, `vertexai`, `bedrock`, `litellm` | `openai` |
+| `HINDSIGHT_API_LLM_PROVIDER` | Provider: `openai`, `openai-codex`, `claude-code`, `anthropic`, `gemini`, `groq`, `minimax`, `ollama`, `lmstudio`, `vertexai`, `bedrock`, `litellm`, `none` | `openai` |
 | `HINDSIGHT_API_LLM_API_KEY` | API key for LLM provider | - |
 | `HINDSIGHT_API_LLM_MODEL` | Model name | `gpt-5-mini` |
 | `HINDSIGHT_API_LLM_BASE_URL` | Custom LLM endpoint | Provider default |
@@ -250,6 +250,13 @@ export HINDSIGHT_API_LLM_MODEL=azure/gpt-4o
 export HINDSIGHT_API_LLM_PROVIDER=litellm
 export HINDSIGHT_API_LLM_API_KEY=your-together-api-key
 export HINDSIGHT_API_LLM_MODEL=together_ai/meta-llama/Llama-3-70b-chat-hf
+
+# No LLM (chunk storage + semantic search only, no API key needed)
+export HINDSIGHT_API_LLM_PROVIDER=none
+# Retain automatically uses chunks mode (no fact extraction)
+# Recall works normally (semantic search, BM25, graph retrieval)
+# Reflect returns HTTP 400 (requires an LLM)
+# Consolidation/observations are disabled
 ```
 
 :::tip OpenAI Codex, Claude Code & Vertex AI Setup