diff --git a/src/editorProposalController.ts b/src/editorProposalController.ts
index 0e2441d..6b44e9b 100644
--- a/src/editorProposalController.ts
+++ b/src/editorProposalController.ts
@@ -17,14 +17,20 @@ import { isAuthorable } from "./workspacePath";
 
 export class EditorProposalController implements vscode.Disposable, vscode.CodeLensProvider {
   private readonly disposables: vscode.Disposable[] = [];
-  private readonly insertionDeco = vscode.window.createTextEditorDecorationType({
-    backgroundColor: new vscode.ThemeColor("diffEditor.insertedTextBackground"),
-  });
-  private readonly deletionDeco = vscode.window.createTextEditorDecorationType({
-    // a non-editable struck-red hint injected AFTER the insertion (INV-52)
-    after: { color: new vscode.ThemeColor("gitDecoration.deletedResourceForeground") },
-    textDecoration: "none",
-  });
+  private readonly insDeco: Record<"human" | "claude", vscode.TextEditorDecorationType> = {
+    human: vscode.window.createTextEditorDecorationType({
+      backgroundColor: "rgba(63,185,80,0.14)", borderColor: "#3fb950",
+      border: "0 0 2px 0", borderStyle: "solid",
+    }),
+    claude: vscode.window.createTextEditorDecorationType({
+      backgroundColor: "rgba(88,166,255,0.15)", borderColor: "#58a6ff",
+      border: "0 0 2px 0", borderStyle: "solid",
+    }),
+  };
+  private readonly delDeco: Record<"human" | "claude", vscode.TextEditorDecorationType> = {
+    human: vscode.window.createTextEditorDecorationType({ after: { color: "#f85149" } }),
+    claude: vscode.window.createTextEditorDecorationType({ after: { color: "#bc8cff" } }),
+  };
   private readonly lensEmitter = new vscode.EventEmitter<void>();
   readonly onDidChangeCodeLenses = this.lensEmitter.event;
   /** Pending debounce timers — one per URI — coalesce rapid-fire propose events
@@ -37,7 +43,7 @@ export class EditorProposalController implements vscode.Disposable, vscode.CodeL
 
   constructor(private readonly proposals: ProposalController) {
     this.disposables.push(
-      this.insertionDeco, this.deletionDeco, this.lensEmitter,
+      this.insDeco.human, this.insDeco.claude, this.delDeco.human, this.delDeco.claude, this.lensEmitter,
       vscode.languages.registerCodeLensProvider({ language: "markdown" }, this),
       this.proposals.onDidChangeProposals(({ uri }) => this.scheduleApply(uri)),
       vscode.window.onDidChangeActiveTextEditor((ed) => ed && this.renderEditor(ed)),
@@ -80,31 +86,43 @@ export class EditorProposalController implements vscode.Disposable, vscode.CodeL
   /** Decorate the editor for every applied proposal on its document (INV-52). */
   private renderEditor(editor: vscode.TextEditor): void {
     const doc = editor.document;
-    if (doc.languageId !== "markdown") {
-      editor.setDecorations(this.insertionDeco, []);
-      editor.setDecorations(this.deletionDeco, []);
-      return;
-    }
+    const clearAll = () => {
+      for (const a of ["human", "claude"] as const) {
+        editor.setDecorations(this.insDeco[a], []);
+        editor.setDecorations(this.delDeco[a], []);
+      }
+    };
+    if (doc.languageId !== "markdown") return clearAll();
     const key = this.proposals.keyFor(doc);
-    const insertions: vscode.Range[] = [];
-    const deletions: vscode.DecorationOptions[] = [];
+    const ins: Record<"human" | "claude", vscode.Range[]> = { human: [], claude: [] };
+    const del: Record<"human" | "claude", vscode.DecorationOptions[]> = { human: [], claude: [] };
+    // Pending proposals — always Claude (INV: proposals are agent-authored).
     for (const v of this.proposals.listProposals(doc)) {
       if (v.anchorStart === null || v.original === undefined || !this.proposals.isApplied(key, v.id)) continue;
       const plan = decorationPlan(v.anchorStart, v.original, v.replacement);
-      for (const ins of plan.insertions) {
-        insertions.push(new vscode.Range(doc.positionAt(ins.start), doc.positionAt(ins.end)));
-      }
-      for (const del of plan.deletions) {
-        deletions.push({
-          range: new vscode.Range(doc.positionAt(del.at), doc.positionAt(del.at)),
-          renderOptions: { after: { contentText: ` ${del.text} `, textDecoration: "line-through" } },
+      for (const i of plan.insertions) ins.claude.push(new vscode.Range(doc.positionAt(i.start), doc.positionAt(i.end)));
+      for (const d of plan.deletions) {
+        del.claude.push({
+          range: new vscode.Range(doc.positionAt(d.at), doc.positionAt(d.at)),
+          renderOptions: { after: { contentText: ` ${d.text} `, textDecoration: "line-through" } },
         });
       }
     }
-    editor.setDecorations(this.insertionDeco, insertions);
-    editor.setDecorations(this.deletionDeco, deletions);
+    // Committed changes-since-baseline are added in Task 7 (pushes into ins/del[author]).
+    this.decorateCommitted(editor, ins, del); // no-op stub until Task 7
+    for (const a of ["human", "claude"] as const) {
+      editor.setDecorations(this.insDeco[a], ins[a]);
+      editor.setDecorations(this.delDeco[a], del[a]);
+    }
   }
 
+  /** Overridden in Task 7 to add committed (non-proposal) author-colored changes. */
+  private decorateCommitted(
+    _editor: vscode.TextEditor,
+    _ins: Record<"human" | "claude", vscode.Range[]>,
+    _del: Record<"human" | "claude", vscode.DecorationOptions[]>,
+  ): void {}
+
   /** CodeLensProvider: a `Accept ▾` / `Reject ▾` pair above each applied block. */
   provideCodeLenses(document: vscode.TextDocument): vscode.CodeLens[] {
     if (document.languageId !== "markdown") return [];