diff --git a/.openclaw-sync/source.json b/.openclaw-sync/source.json
index a45745f65..ca4185db4 100644
--- a/.openclaw-sync/source.json
+++ b/.openclaw-sync/source.json
@@ -1,5 +1,5 @@
 {
   "repository": "openclaw/openclaw",
-  "sha": "526372ea36e3f74ce720cc6a7f9ca0231be62a70",
-  "syncedAt": "2026-04-28T05:06:28.976Z"
+  "sha": "3d53b399176390e36fff4dfcd67ddb21e0055ce4",
+  "syncedAt": "2026-04-28T05:11:23.392Z"
 }
diff --git a/docs/concepts/model-providers.md b/docs/concepts/model-providers.md
index cdeeaa699..fbfe15a4a 100644
--- a/docs/concepts/model-providers.md
+++ b/docs/concepts/model-providers.md
@@ -329,6 +329,8 @@ Use `models.providers` (or `models.json`) to add **custom** providers or OpenAI/
 
 Many of the bundled provider plugins below already publish a default catalog. Use explicit `models.providers.<id>` entries only when you want to override the default base URL, headers, or model list.
 
+Gateway model capability checks also read explicit `models.providers.<id>.models[]` metadata. If a custom or proxy model accepts images, set `input: ["text", "image"]` on that model so WebChat and node-origin attachment paths pass images as native model inputs instead of text-only media refs.
+
 ### Moonshot AI (Kimi)
 
 Moonshot ships as a bundled provider plugin. Use the built-in provider by default, and add an explicit `models.providers.moonshot` entry only when you need to override the base URL or model metadata: