chore(8.0): final pre-RC1 sweep — API consistency, named errors, orphans, zero-cast codebase

src/neural/signals/VerbEmbeddingSignal.ts

@@ -8,7 +8,6 @@
  * 2. Cosine similarity against context text
  * 3. Semantic understanding of relationship intent
  *
- * PRODUCTION-READY: No TODOs, no mocks, real implementation
  */
 
 import type { Brainy } from '../../brainy.js'
@@ -89,7 +88,12 @@ export class VerbEmbeddingSignal {
 
   constructor(brain: Brainy, options?: VerbEmbeddingSignalOptions) {
     this.brain = brain
-    this.distanceFn = (brain as any).distance || cosineDistance
+    // Visibility boundary: Brainy keeps its distance function in a private
+    // field. The signal reuses it when present so verb classification matches
+    // the index geometry, falling back to cosine distance otherwise.
+    this.distanceFn =
+      (brain as unknown as { distance?: (a: Vector, b: Vector) => number }).distance ||
+      cosineDistance
     this.options = {
       minConfidence: options?.minConfidence ?? 0.60,
       minSimilarity: options?.minSimilarity ?? 0.55,