diff --git a/src/attributionController.ts b/src/attributionController.ts
index 8353fe8..f33df45 100644
--- a/src/attributionController.ts
+++ b/src/attributionController.ts
@@ -2,9 +2,11 @@
  * AttributionController — the thin editor-facing layer for F3 (spec §6.2).
  * Wires the pure AttributionTracker + PendingEditRegistry + Store/Anchorer to
  * the editor: human typing → human spans, seam edits → agent spans (INV-9),
- * decorations (Claude tint / human gutter border / toggle), save-time
- * persistence, load/external-change resolve-or-orphan (INV-1/INV-6), and the
- * orphan status-bar count. Sidecar self-write suppression and the shared
+ * save-time persistence, load/external-change resolve-or-orphan
+ * (INV-1/INV-6), and the orphan status-bar count. The editor carries no
+ * in-editor attribution decorations — the rendered preview is the single
+ * review surface (F10/INV-32); spansFor() feeds it the live attribution.
+ * Sidecar self-write suppression and the shared
  * FileSystemWatcher live in CoauthorStore / extension.ts (the sidecar is
  * co-owned with ThreadController).
  */
@@ -44,23 +46,10 @@ interface DocAttribution {
   hadAttributions: boolean;
 }
 
-const AGENT_DECO: vscode.DecorationRenderOptions = {
-  backgroundColor: "rgba(99, 102, 241, 0.18)",
-  overviewRulerColor: "rgba(99, 102, 241, 0.8)",
-  overviewRulerLane: vscode.OverviewRulerLane.Right,
-};
-const HUMAN_DECO: vscode.DecorationRenderOptions = {
-  borderColor: "rgba(16, 185, 129, 0.8)",
-  borderStyle: "solid",
-  borderWidth: "0 0 0 2px",
-};
-
 export class AttributionController implements vscode.Disposable {
   private readonly disposables: vscode.Disposable[] = [];
   private readonly docs = new Map<string, DocAttribution>();
   private readonly pending = new PendingEditRegistry();
-  private readonly agentType = vscode.window.createTextEditorDecorationType(AGENT_DECO);
-  private readonly humanType = vscode.window.createTextEditorDecorationType(HUMAN_DECO);
   private readonly statusItem = vscode.window.createStatusBarItem(vscode.StatusBarAlignment.Right, 90);
   private readonly output = vscode.window.createOutputChannel("Cowriting Attribution");
   private visible = true;
@@ -79,7 +68,7 @@ export class AttributionController implements vscode.Disposable {
     private readonly rootDir: string | undefined,
     private readonly guard: VersionGuard,
   ) {
-    this.disposables.push(this.agentType, this.humanType, this.statusItem, this.output, this.applyEmitter);
+    this.disposables.push(this.statusItem, this.output, this.applyEmitter);
     this.disposables.push(
       vscode.commands.registerCommand("cowriting.toggleAttribution", () => this.toggle()),
       vscode.workspace.onDidChangeTextDocument((e) => this.onDidChange(e)),
@@ -354,19 +343,6 @@ export class AttributionController implements vscode.Disposable {
   private render(document: vscode.TextDocument): void {
     if (!this.isTracked(document)) return;
     const s = this.docs.get(this.keyOf(document));
-    const spans = this.visible && s ? s.spans : [];
-    const toRange = (sp: LiveSpan) =>
-      new vscode.Range(document.positionAt(sp.start), document.positionAt(sp.end));
-    const agentRanges = spans.filter((x) => x.author.kind === "agent").map(toRange);
-    const humanRanges = spans.filter((x) => x.author.kind === "human").map(toRange);
-    // Apply decorations to ALL visible split-editors showing this document, not
-    // just the first match — each editor pane has its own decoration layer.
-    for (const editor of vscode.window.visibleTextEditors) {
-      if (editor.document === document) {
-        editor.setDecorations(this.agentType, agentRanges);
-        editor.setDecorations(this.humanType, humanRanges);
-      }
-    }
     if (document === vscode.window.activeTextEditor?.document) {
       this.renderStatus(s);
     }