Upgraded embedding model to voyage-3.5, updated README.md

README.md

@@ -8,11 +8,15 @@ In kongruity, the artifacts become "sticky notes." A board full of them looks ch
 
 With a click, they are semantically evaluated, grouped into thematic clusters with descriptive headers, rankable and exportable to project planning and execution tools.
 
+## Voyage AI voyage-3.5
+
+![Embedding model benchmarking.](Voyage.jpg)
+
 ## Clustering and evaluation: methodology
 
 Two models run in parallel, and neither sees the other's work. Anthropic's `claude-sonnet-5` (`backend/services/clustering.service.js`) reads the raw text of every note and groups them into labeled thematic clusters. 
 
-At the same time, Voyage AI's voyage-3 model (`backend/services/embedding.service.js`) converts each note's text into a numeric representation of its semantic meaning aka vector. 
+At the same time, Voyage AI's voyage-3.5 model (`backend/services/embedding.service.js`) converts each note's text into a numeric representation of its semantic meaning aka vector. 
 
 Once the LLM returns, kongruity scores that grouping (`backend/services/validation.service.js`) using an established silhouette coefficient, with cosine distance rather than Euclidean as the proximity metric. 
 

backend/services/embedding.service.js

@@ -27,7 +27,7 @@ export const embedNotes = async (notes) => {
             for await (const chunk of batches) {
                 const response = await client.embed({
                     input: chunk.map((n) => n.text),
-                    model: "voyage-3",
+                    model: "voyage-3.5",
                 });
 
                 response.data.forEach((item, i) => {

frontend/src/components/stickies.tsx

@@ -95,7 +95,7 @@ const Stickies = () => {
                 <div className="clusters-container">
                     {score != null && (
                         <div className="cohesion-score">
-                            Cluster cohesion: {scoreLabel(score)}
+                            Cluster cohesion: <strong>{scoreLabel(score)}</strong>
                         </div>
                     )}
                     {rankedClusters.map((group, index) => (

frontend/src/styles/stickies.css

@@ -1,100 +1,107 @@
 .stickies-grid {
-  display: flex;
-  flex-wrap: wrap;
-  gap: 16px;
-  justify-content: center;
-  margin-top: 18px;
-  padding: 24px;
+    display: flex;
+    flex-wrap: wrap;
+    gap: 16px;
+    justify-content: center;
+    margin-top: 18px;
+    padding: 24px;
 }
 
 .stickies-container {
-  margin: 36px 0px 36px 0px;
+    margin: 36px 0px 36px 0px;
 }
 
 .clusters-container {
-  display: flex;
-  flex-direction: column;
-  gap: 32px;
-  padding: 24px 0;
+    display: flex;
+    flex-direction: column;
+    gap: 32px;
+    padding: 24px 0;
 }
 
 .cluster-group {
-  border: 1px solid #6dd6f4;
-  border-radius: 8px;
-  padding: 16px;
+    border: 1px solid #6dd6f4;
+    border-radius: 8px;
+    padding: 16px;
 }
 
 .cluster-draggable {
-  cursor: grab;
-  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
+    cursor: grab;
+    transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
 }
 
 .cluster-draggable:active {
-  cursor: grabbing;
+    cursor: grabbing;
 }
 
 .cluster-drag-over {
-  border-color: #ffb7ce;
-  box-shadow: 0 0 12px rgba(255, 183, 206, 0.4);
-  transform: scale(1.01);
+    border-color: #ffb7ce;
+    box-shadow: 0 0 12px rgba(255, 183, 206, 0.4);
+    transform: scale(1.01);
 }
 
 .cluster-header {
-  display: flex;
-  align-items: center;
-  gap: 12px;
-  margin-bottom: 16px;
+    position: relative;
+    display: flex;
+    align-items: center;
+    gap: 12px;
+    margin-bottom: 16px;
+    min-height: 32px;
 }
 
 .cluster-rank {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  width: 32px;
-  height: 32px;
-  border-radius: 50%;
-  background: #6dd6f4;
-  color: #1a1a2e;
-  font-weight: 700;
-  font-size: 0.95em;
-  flex-shrink: 0;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 32px;
+    height: 32px;
+    border-radius: 50%;
+    background: #6dd6f4;
+    color: #1a1a2e;
+    font-weight: 700;
+    font-size: 0.95em;
+    flex-shrink: 0;
 }
 
 .cluster-reorder-hint {
-  font-size: 0.8em;
-  color: #9ca3af;
-  font-style: italic;
-  white-space: nowrap;
-  flex-shrink: 0;
+    font-size: 0.8em;
+    color: #9ca3af;
+    font-style: italic;
+    white-space: nowrap;
+    flex-shrink: 0;
 }
 
 .cluster-label {
-  margin: 0;
-  font-size: 1.2em;
-  font-weight: 600;
-  flex: 1;
+    position: absolute;
+    left: 50%;
+    transform: translateX(-50%);
+    max-width: 50%;
+    margin: 0;
+    font-size: 1.2em;
+    font-weight: 600;
+    pointer-events: none;
 }
 
 .cluster-drag-handle {
-  font-size: 1.4em;
-  color: #6dd6f4;
-  opacity: 0.4;
-  user-select: none;
-  transition: opacity 0.2s ease;
-  flex-shrink: 0;
+    margin-left: auto;
+    font-size: 1.4em;
+    color: #6dd6f4;
+    opacity: 0.4;
+    user-select: none;
+    transition: opacity 0.2s ease;
+    flex-shrink: 0;
 }
 
 .cluster-draggable:hover .cluster-drag-handle {
-  opacity: 0.8;
+    opacity: 0.8;
 }
 
 .cohesion-score {
-  text-align: center;
-  font-size: 0.95em;
-  color: #e0e0e0;
-  padding: 8px 16px;
-  background: rgba(109, 214, 244, 0.1);
-  border-radius: 6px;
-  width: fit-content;
-  margin: 0 auto;
-}
+    text-align: center;
+    font-size: 0.95em;
+    color: #e0e0e0;
+    padding: 8px 16px;
+    background: rgba(109, 214, 244, 0.1);
+    border-radius: 6px;
+    width: fit-content;
+    margin: 0 auto;
+}