diff --git a/src/proposalController.ts b/src/proposalController.ts
index ba9649c..af90a30 100644
--- a/src/proposalController.ts
+++ b/src/proposalController.ts
@@ -94,6 +94,7 @@ export class ProposalController implements vscode.Disposable {
         replaced: p.original ?? fp?.text ?? "",
         replacement: p.replacement,
         original: p.original,
+        author: p.author?.kind === "agent" ? "claude" : "human",
       };
     });
   }
diff --git a/src/trackChangesModel.ts b/src/trackChangesModel.ts
index 4d10fd9..9351551 100644
--- a/src/trackChangesModel.ts
+++ b/src/trackChangesModel.ts
@@ -837,6 +837,8 @@ export interface ProposalView {
   replacement: string;
   /** F12/#64 (INV-48): the pre-apply original, set after optimistic apply. */
   original?: string;
+  /** Who made the proposal — colors the del/ins. Defaults to "claude". */
+  author?: AuthorKind;
 }
 
 function proposalBlockHtml(p: ProposalView, render: (src: string) => string): string {
@@ -848,8 +850,9 @@ function proposalBlockHtml(p: ProposalView, render: (src: string) => string): st
     }
   };
   const unanchored = p.anchorStart === null ? " cw-proposal-unanchored" : "";
-  const before = p.replaced ? `<del class="cw-del">${safe(p.replaced)}</del>` : "";
-  const after = `<ins class="cw-add">${safe(p.replacement)}</ins>`;
+  const who = p.author ?? "claude";
+  const before = p.replaced ? `<del class="cw-del-${who}">${safe(p.replaced)}</del>` : "";
+  const after = `<ins class="cw-ins-${who}">${safe(p.replacement)}</ins>`;
   const actions =
     `<span class="cw-actions">` +
     `<span class="cw-btngroup">` +
diff --git a/test/trackChangesModel.test.ts b/test/trackChangesModel.test.ts
index dfabb87..2907fb1 100644
--- a/test/trackChangesModel.test.ts
+++ b/test/trackChangesModel.test.ts
@@ -503,6 +503,13 @@ describe("renderReview", () => {
     expect(html).toContain("cw-ins-human"); // author-colored insertion
     expect(html).not.toContain("&gt;&gt;"); // sanity: markers not escaped as text
   });
+
+  test("renderReview: a proposal block colors its del/ins by author (claude default)", () => {
+    const proposals: ProposalView[] = [{ id: "p1", anchorStart: 0, anchorEnd: 5, replaced: "hello", replacement: "goodbye" }];
+    const html = renderReview("hello", "hello", [], proposals);
+    expect(html).toContain('cw-del-claude');
+    expect(html).toContain('cw-ins-claude');
+  });
 });
 
 import { renderTrackChanges as rtc2 } from "../src/trackChangesModel";