second commit

internal/pgvector_stub/vector.go

@@ -0,0 +1,20 @@
+package pgvector
+
+// Vector represents a vector for similarity search.
+// Stub implementation for building without PostgreSQL/pgvector extension.
+type Vector []float32
+
+// NewVector creates a new vector from a slice of float32.
+func NewVector(slice []float32) Vector {
+	return Vector(slice)
+}
+
+// String returns the string representation of the vector.
+func (v Vector) String() string {
+	return ""
+}
+
+// Dimensions returns the number of dimensions in the vector.
+func (v Vector) Dimensions() int {
+	return len(v)
+}