From 4137be62a118c08b97d1141821c911079b469c59 Mon Sep 17 00:00:00 2001
From: chengyongru <chengyongru.ai@gmail.com>
Date: Thu, 9 Jul 2026 16:20:01 +0800
Subject: [PATCH] fix(matrix): preserve mxc markdown image sources

---
 nanobot/channels/matrix.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/nanobot/channels/matrix.py b/nanobot/channels/matrix.py
index 8a2fc9d8..9e10fe83 100644
--- a/nanobot/channels/matrix.py
+++ b/nanobot/channels/matrix.py
@@ -18,7 +18,7 @@ from nanobot.security.workspace_policy import is_path_within
 try:
     import aiohttp
     import nh3
-    from mistune import create_markdown
+    from mistune import HTMLRenderer, create_markdown
     from nio import (
         AsyncClient,
         AsyncClientConfig,
@@ -77,7 +77,7 @@ class _MediaTooLargeError(Exception):
     """Raised when an inbound Matrix media download exceeds the configured cap."""
 
 MATRIX_MARKDOWN = create_markdown(
-    escape=True,
+    renderer=HTMLRenderer(escape=True, allow_harmful_protocols=("mxc://",)),
     plugins=["table", "strikethrough", "url", "superscript", "subscript"],
 )