From 46662b7eec5b0f15de94af6da5e04339e6a08f04 Mon Sep 17 00:00:00 2001
From: Ryan Vogel <89211796+R44VC0RP@users.noreply.github.com>
Date: Sat, 1 Aug 2026 11:04:55 -0400
Subject: [PATCH] fix(tui): strip markdown from inbox previews

---
 packages/tui/src/component/session-inbox.tsx  |  7 +++---
 packages/tui/src/util/markdown-preview.ts     | 17 +++++++++++++
 .../tui/test/util/markdown-preview.test.ts    | 25 +++++++++++++++++++
 3 files changed, 45 insertions(+), 4 deletions(-)
 create mode 100644 packages/tui/src/util/markdown-preview.ts
 create mode 100644 packages/tui/test/util/markdown-preview.test.ts

diff --git a/packages/tui/src/component/session-inbox.tsx b/packages/tui/src/component/session-inbox.tsx
index 5fc15184e0..b9c5a183b6 100644
--- a/packages/tui/src/component/session-inbox.tsx
+++ b/packages/tui/src/component/session-inbox.tsx
@@ -14,6 +14,7 @@ import { tint } from "../theme/color"
 import { getScrollAcceleration } from "../util/scroll"
 import { withTimestampedFallback } from "@opencode-ai/util/session-title-fallback"
 import { activityVerb } from "../util/activity-verb"
+import { markdownPreview } from "../util/markdown-preview"
 import { Spinner } from "./spinner"
 import type { SessionTabsStatus } from "./session-tabs"
 
@@ -176,14 +177,12 @@ export function SessionInbox() {
         const preview = assistant?.content
           .filter((part) => part.type === "text")
           .map((part) => part.text)
-          .join(" ")
-          .replace(/\s+/g, " ")
-          .trim()
+          .join("\n")
         return {
           sessionID: tab.sessionID,
           title: session ? withTimestampedFallback(session) : (tab.title ?? "Loading session…"),
           updated: session?.time.updated ?? 0,
-          preview: preview || "No assistant response yet",
+          preview: markdownPreview(preview ?? "") || "No assistant response yet",
           status,
           group: sessionInboxGroup(session?.time.updated ?? 0, status.busy),
         }
diff --git a/packages/tui/src/util/markdown-preview.ts b/packages/tui/src/util/markdown-preview.ts
new file mode 100644
index 0000000000..d66b94731b
--- /dev/null
+++ b/packages/tui/src/util/markdown-preview.ts
@@ -0,0 +1,17 @@
+export function markdownPreview(input: string) {
+  return input
+    .replace(/```[^\n]*\n?([\s\S]*?)```/g, "$1")
+    .replace(/`([^`\n]+)`/g, "$1")
+    .replace(/!\[([^\]]*)\]\((?:\\.|[^)])*\)/g, "$1")
+    .replace(/\[([^\]]+)\]\((?:\\.|[^)])*\)/g, "$1")
+    .replace(/\[([^\]]+)\]\[[^\]]*\]/g, "$1")
+    .replace(/^ {0,3}(?:#{1,6}\s+|>\s?|(?:[-+*]|\d+[.)])\s+)/gm, "")
+    .replace(/(?<!\\)~~(?=\S)([\s\S]*?\S)(?<!\\)~~/g, "$1")
+    .replace(/(?<!\\)\*\*(?=\S)([\s\S]*?\S)(?<!\\)\*\*/g, "$1")
+    .replace(/(?<!\\)__(?=\S)([\s\S]*?\S)(?<!\\)__/g, "$1")
+    .replace(/(?<![\\*])\*(?=\S)([^*\n]*?\S)(?<!\\)\*(?!\*)/g, "$1")
+    .replace(/(?<![\\_])_(?=\S)([^_\n]*?\S)(?<!\\)_(?!_)/g, "$1")
+    .replace(/\\([\\`*_[\]{}()#+\-.!>|~])/g, "$1")
+    .replace(/\s+/g, " ")
+    .trim()
+}
diff --git a/packages/tui/test/util/markdown-preview.test.ts b/packages/tui/test/util/markdown-preview.test.ts
new file mode 100644
index 0000000000..37d88c5cd0
--- /dev/null
+++ b/packages/tui/test/util/markdown-preview.test.ts
@@ -0,0 +1,25 @@
+import { expect, test } from "bun:test"
+import { markdownPreview } from "../../src/util/markdown-preview"
+
+test("strips common Markdown presentation syntax from previews", () => {
+  expect(markdownPreview("The capture shows **Reset** and a _short-lived_ **override**.")).toBe(
+    "The capture shows Reset and a short-lived override.",
+  )
+  expect(markdownPreview("Use [`sessionRename`](https://example.com) with ~~old~~ new behavior.")).toBe(
+    "Use sessionRename with old new behavior.",
+  )
+  expect(markdownPreview("![diagram](image.png) Review [the result][result].")).toBe("diagram Review the result.")
+})
+
+test("flattens block syntax and code without losing its content", () => {
+  expect(markdownPreview("# Result\n\n- First item\n- Second `item`\n> Finished")).toBe(
+    "Result First item Second item Finished",
+  )
+  expect(markdownPreview("```ts\nconst answer = 42\n```")).toBe("const answer = 42")
+})
+
+test("preserves literal asterisks, globs, and escaped punctuation", () => {
+  expect(markdownPreview("Search **/*.ts, calculate 2 * 3, and keep \\*literal\\*. ")).toBe(
+    "Search **/*.ts, calculate 2 * 3, and keep *literal*.",
+  )
+})