diff --git a/packages/source-control-azure-devops/src/server/azureDevOpsPullRequestJson.test.ts b/packages/source-control-azure-devops/src/server/azureDevOpsPullRequestJson.test.ts
index b9b1e36a9434..9a1911655c26 100644
--- a/packages/source-control-azure-devops/src/server/azureDevOpsPullRequestJson.test.ts
+++ b/packages/source-control-azure-devops/src/server/azureDevOpsPullRequestJson.test.ts
@@ -248,6 +248,41 @@ describe("decodeThreadsJson", () => {
     expect(comments.map((comment) => comment.id)).toEqual(["4:1", "4:2", "4:3"]);
   });
 
+  it("marks a comment whose text was edited, not one only otherwise updated", () => {
+    const comments = expectSuccess(
+      decodeThreadsJson(
+        asJson({
+          value: [
+            {
+              id: 5,
+              comments: [
+                {
+                  id: 1,
+                  content: "Edited remark.",
+                  publishedDate: "2026-07-02T00:00:00Z",
+                  lastUpdatedDate: "2026-07-02T03:00:00Z",
+                  lastContentUpdatedDate: "2026-07-02T03:00:00Z",
+                },
+                {
+                  id: 2,
+                  content: "Updated remark.",
+                  publishedDate: "2026-07-02T01:00:00Z",
+                  lastUpdatedDate: "2026-07-02T04:00:00Z",
+                  lastContentUpdatedDate: "2026-07-02T01:00:00Z",
+                },
+              ],
+            },
+          ],
+        }),
+      ),
+    );
+
+    expect(comments.map((comment) => comment.editedAt)).toEqual([
+      "2026-07-02T03:00:00Z",
+      undefined,
+    ]);
+  });
+
   it("drops deleted threads and threads with nothing to show", () => {
     const comments = expectSuccess(
       decodeThreadsJson(
diff --git a/packages/source-control-azure-devops/src/server/azureDevOpsPullRequestJson.ts b/packages/source-control-azure-devops/src/server/azureDevOpsPullRequestJson.ts
index b3632ef1af98..7d9a22af1d98 100644
--- a/packages/source-control-azure-devops/src/server/azureDevOpsPullRequestJson.ts
+++ b/packages/source-control-azure-devops/src/server/azureDevOpsPullRequestJson.ts
@@ -85,6 +85,8 @@ const RawThreadSchema = Schema.Struct({
           content: Schema.optional(Schema.NullOr(Schema.String)),
           author: Schema.optional(Schema.NullOr(RawIdentitySchema)),
           publishedDate: Schema.optional(Schema.NullOr(Schema.String)),
+          // lastUpdatedDate moves on any change to the comment; this one only on its text.
+          lastContentUpdatedDate: Schema.optional(Schema.NullOr(Schema.String)),
           isDeleted: Schema.optional(Schema.NullOr(Schema.Boolean)),
           commentType: Schema.optional(Schema.NullOr(Schema.String)),
         }),
@@ -301,6 +303,7 @@ export function decodeThreadsJson(
     const path = toRepositoryPath(thread.threadContext?.filePath);
     for (const comment of thread.comments ?? []) {
       const publishedDate = trimmed(comment.publishedDate);
+      const editedAt = trimmed(comment.lastContentUpdatedDate);
       if (
         comment.isDeleted === true ||
         comment.commentType?.trim().toLowerCase() === "system" ||
@@ -315,6 +318,9 @@ export function decodeThreadsJson(
         author: toActor(comment.author),
         body: comment.content ?? "",
         createdAt: publishedDate,
+        ...(editedAt !== null && Date.parse(editedAt) > Date.parse(publishedDate)
+          ? { editedAt }
+          : {}),
         url: null,
         path,
         reviewState: null,