Telegram: honor caption param for media sends (#1888)

Co-authored-by: Marc Güell Segarra <mguellsegarra@users.noreply.github.com>

CHANGELOG.md

@@ -15,6 +15,7 @@ Status: unreleased.
 - macOS: avoid crash when rendering code blocks by bumping Textual to 0.3.1. (#2033) Thanks @garricn.
 - Browser: fall back to URL matching for extension relay target resolution. (#1999) Thanks @jonit-dev.
 - Update: ignore dist/control-ui for dirty checks and restore after ui builds. (#1976) Thanks @Glucksberg.
+- Telegram: allow caption param for media sends. (#1888) Thanks @mguellsegarra.
 
 ## 2026.1.24-3
 

src/channels/plugins/actions/telegram.ts

@@ -13,11 +13,9 @@ const providerId = "telegram";
 function readTelegramSendParams(params: Record<string, unknown>) {
   const to = readStringParam(params, "to", { required: true });
   const mediaUrl = readStringParam(params, "media", { trim: false });
-  const content =
-    readStringParam(params, "message", {
-      required: !mediaUrl,
-      allowEmpty: true,
-    }) ?? "";
+  const message = readStringParam(params, "message", { required: !mediaUrl, allowEmpty: true });
+  const caption = readStringParam(params, "caption", { allowEmpty: true });
+  const content = message || caption || "";
   const replyTo = readStringParam(params, "replyTo");
   const threadId = readStringParam(params, "threadId");
   const buttons = params.buttons;