diff --git a/extensions/slack/src/progress-blocks.test.ts b/extensions/slack/src/progress-blocks.test.ts
index 45aec9dd3b0f..21572026357a 100644
--- a/extensions/slack/src/progress-blocks.test.ts
+++ b/extensions/slack/src/progress-blocks.test.ts
@@ -372,7 +372,6 @@ describe("native Slack progress stream chunks", () => {
           kind: "command-output",
           icon: "🛠️",
           label: "Bash",
-          detail: "completed",
           status: "completed",
           text: "🛠️ completed",
           toolName: "bash",
diff --git a/extensions/slack/src/progress-blocks.ts b/extensions/slack/src/progress-blocks.ts
index 6b911b6d7ca7..51a796c874c6 100644
--- a/extensions/slack/src/progress-blocks.ts
+++ b/extensions/slack/src/progress-blocks.ts
@@ -80,7 +80,7 @@ function legacyLineDetail(line: ChannelProgressDraftLine, maxChars: number): str
 
 function lineTaskTitle(line: ChannelProgressDraftLine, maxLineChars: number): string {
   const label = line.label.replace(/\s+/g, " ").trim() || line.toolName || line.kind || "Update";
-  const detail = lineDetailParts(line).join(" · ");
+  const detail = lineDetailParts(line).join(" · ") || line.status?.trim();
   const fallback = line.text.replace(/\s+/g, " ").trim();
   if (detail) {
     return compactTitle(`${label} — ${compactDetail(detail, maxLineChars)}`);