Bug

When using the message tool to send to a Telegram forum group topic, the message_thread_id is not included in the Telegram Bot API sendMessage call. All messages land in the General topic regardless of the target format used.

Reproduction

1. Have a Telegram group with Forum Topics enabled
2. Configure topics in openclaw.json with topic IDs
3. Use the message tool with various target formats:
   • telegram:-100xxx:285
   • telegram:-100xxx:topic:285
4. Message always arrives in General (topic 1)

Expected

Message should arrive in the specified topic (thread_id=285 in this case).

Workaround

Calling the Telegram Bot API directly with message_thread_id parameter works correctly:

curl -s "https://api.telegram.org/bot$TOKEN/sendMessage" \
  -d "chat_id=-100xxx" \
  -d "message_thread_id=285" \
  -d "text=test"

Environment

• OpenClaw: 2026.2.25
• macOS 26.3 (arm64)
• Node 25.6.0
• Bot has can_manage_topics: true
• Group is a supergroup with is_forum: true

Notes

Inbound topic routing works correctly after enabling can_manage_topics — each topic creates its own session (topic:<id>). The issue is only with outbound delivery via the message tool.