diff --git a/backend/builder/service.py b/backend/builder/service.py
index b7e0fe7..9fc128b 100644
--- a/backend/builder/service.py
+++ b/backend/builder/service.py
@@ -20,7 +20,7 @@ def _ensure_storage_dir():
 
 def _binary_url(melody_id: str) -> str:
     """Returns the API URL to download the binary for a given melody id."""
-    return f"/api/builder/melodies/{melody_id}/download"
+    return f"/builder/melodies/{melody_id}/download"
 
 
 def _row_to_built_melody(row: dict) -> BuiltMelodyInDB:
diff --git a/frontend/src/melodies/builder/BuilderForm.jsx b/frontend/src/melodies/builder/BuilderForm.jsx
index f845697..15c36c2 100644
--- a/frontend/src/melodies/builder/BuilderForm.jsx
+++ b/frontend/src/melodies/builder/BuilderForm.jsx
@@ -131,7 +131,7 @@ export default function BuilderForm() {
             ← Back to Builder
           </button>
           <h1 className="text-2xl font-bold" style={{ color: "var(--text-heading)" }}>
-            {isEdit ? "Edit Built Melody" : "New Built Melody"}
+            {isEdit ? "Edit Archetype" : "New Archetype"}
           </h1>
         </div>
         <div className="flex gap-3">
@@ -167,7 +167,7 @@ export default function BuilderForm() {
       <div className="space-y-6">
         {/* --- Info Section --- */}
         <section className="rounded-lg p-6 border" style={sectionStyle}>
-          <h2 className="text-lg font-semibold mb-4" style={{ color: "var(--text-heading)" }}>Melody Info</h2>
+          <h2 className="text-lg font-semibold mb-4" style={{ color: "var(--text-heading)" }}>Archetype Info</h2>
           <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
             <div>
               <label className="block text-sm font-medium mb-1" style={labelStyle}>Name *</label>
diff --git a/frontend/src/melodies/builder/BuilderList.jsx b/frontend/src/melodies/builder/BuilderList.jsx
index 912b480..8d02b24 100644
--- a/frontend/src/melodies/builder/BuilderList.jsx
+++ b/frontend/src/melodies/builder/BuilderList.jsx
@@ -51,7 +51,7 @@ export default function BuilderList() {
       <div className="flex items-center justify-between mb-6">
         <div>
           <h1 className="text-2xl font-bold" style={{ color: "var(--text-heading)" }}>
-            Melody Builder
+            Archetype Builder
           </h1>
           <p className="text-sm mt-1" style={{ color: "var(--text-muted)" }}>
             Build binary (.bsm) files and firmware PROGMEM code from melody step notation.
@@ -62,7 +62,7 @@ export default function BuilderList() {
           className="px-4 py-2 text-sm rounded-md transition-colors"
           style={{ backgroundColor: "var(--btn-primary)", color: "var(--text-white)" }}
         >
-          + Add Melody
+          + Add Archetype
         </button>
       </div>