diff --git a/apps/shared/OpenClawKit/Sources/OpenClawChatUI/ChatMarkdownRenderer.swift b/apps/shared/OpenClawKit/Sources/OpenClawChatUI/ChatMarkdownRenderer.swift
index e68c8591b..e763814e4 100644
--- a/apps/shared/OpenClawKit/Sources/OpenClawChatUI/ChatMarkdownRenderer.swift
+++ b/apps/shared/OpenClawKit/Sources/OpenClawChatUI/ChatMarkdownRenderer.swift
@@ -6,6 +6,23 @@ public enum ChatMarkdownVariant: String, CaseIterable, Sendable {
     case compact
 }
 
+// MARK: - Textual Bundle Availability
+
+/// Checks if the Textual syntax highlighting bundle is available.
+/// This must be called BEFORE any Textual types are accessed to avoid a crash
+/// from SPM's generated Bundle.module accessor when the bundle is missing.
+private let textualBundleAvailable: Bool = {
+    let bundleNames = ["textual_Textual", "Textual_Textual"]
+    guard let resourceURL = Bundle.main.resourceURL else { return false }
+    for name in bundleNames {
+        let bundleURL = resourceURL.appendingPathComponent("\(name).bundle")
+        if FileManager.default.fileExists(atPath: bundleURL.path) {
+            return true
+        }
+    }
+    return false
+}()
+
 @MainActor
 struct ChatMarkdownRenderer: View {
     enum Context {
@@ -22,12 +39,20 @@ struct ChatMarkdownRenderer: View {
     var body: some View {
         let processed = ChatMarkdownPreprocessor.preprocess(markdown: self.text)
         VStack(alignment: .leading, spacing: 10) {
-            StructuredText(markdown: processed.cleaned)
-                .modifier(ChatMarkdownStyle(
-                    variant: self.variant,
-                    context: self.context,
+            if textualBundleAvailable {
+                StructuredText(markdown: processed.cleaned)
+                    .modifier(ChatMarkdownStyle(
+                        variant: self.variant,
+                        context: self.context,
+                        font: self.font,
+                        textColor: self.textColor))
+            } else {
+                // Fallback when Textual's resource bundle is missing (avoids crash).
+                FallbackMarkdownText(
+                    text: processed.cleaned,
                     font: self.font,
-                    textColor: self.textColor))
+                    textColor: self.textColor)
+            }
 
             if !processed.images.isEmpty {
                 InlineImageList(images: processed.images)
@@ -88,3 +113,33 @@ private struct InlineImageList: View {
         }
     }
 }
+
+// MARK: - Fallback Markdown Rendering
+
+/// Fallback markdown renderer using SwiftUI's native AttributedString.
+/// Used when Textual's resource bundle is missing to avoid crashes.
+@MainActor
+private struct FallbackMarkdownText: View {
+    let text: String
+    let font: Font
+    let textColor: Color
+
+    var body: some View {
+        if let attributed = try? AttributedString(markdown: self.text, options: Self.markdownOptions) {
+            Text(attributed)
+                .font(self.font)
+                .foregroundStyle(self.textColor)
+                .textSelection(.enabled)
+        } else {
+            Text(self.text)
+                .font(self.font)
+                .foregroundStyle(self.textColor)
+                .textSelection(.enabled)
+        }
+    }
+
+    private static let markdownOptions = AttributedString.MarkdownParsingOptions(
+        allowsExtendedAttributes: true,
+        interpretedSyntax: .inlineOnlyPreservingWhitespace,
+        failurePolicy: .returnPartiallyParsedIfPossible)
+}