openclaw - 💡(How to fix) Fix [Bug]: requireMention bypassed for ALL agents in Telegram Forum topics [1 comments, 2 participants]

Summary

In Telegram Forum groups with requireMention: true, ALL agents receive and process messages from forum topics — even those not @mentioned. The mention gating is completely bypassed for forum topic messages.

Environment

• OpenClaw version: 2026.4.27
• OS: Windows 10.0.26200
• Node: v24.13.1
• Channel: Telegram (6 bot accounts in the same forum group)
• Group: -1003544654550 (forum/supergroup, is_forum: true)

Config

{
  channels: {
    telegram: {
      groups: {
        "-1003544654550": {
          requireMention: true,
          topics: {}
        }
      }
    }
  },
  agents: {
    list: [
      { id: "deepseek", groupChat: { mentionPatterns: ["@深", "@阿深", "@XuanDeepSeekBot", "@所有人"] } },
      { id: "kimi",     groupChat: { mentionPatterns: ["@月", "@老月", "@所有人", "@XuanKimiBot"] } },
      { id: "minimax",  groupChat: { mentionPatterns: ["@小极", "@XuanMinimaxBot", "@所有人"] } },
      { id: "general",  groupChat: { mentionPatterns: ["@零", "@DaoXuan1Bot"] } },
      { id: "glm",      groupChat: { mentionPatterns: ["@愚者", "@所有人", "@DaoXuan2Bot"] } },
      { id: "qwen",     groupChat: { mentionPatterns: ["@千问", "@问哥", "@Xuandao_bot", "@所有人"] } }
    ]
  }
}

Steps to Reproduce

1. Configure a Telegram Forum group (is_forum: true) with requireMention: true
2. Add multiple bot accounts to the group
3. Send a message in a forum topic that @mentions only ONE specific bot
   • e.g., @XuanDeepSeekBot 辩题：爱欲已死 vs 爱欲未死
4. Check session files under ~/.openclaw/agents/*/sessions/ for ALL agents

Expected Behavior

Only the @mentioned agent (deepseek) should receive and process the message. The other 5 agents should drop it at the Gateway level with reason "no mention".

Actual Behavior

All 6 agents received and processed the message. Session file evidence from agents/*/sessions/*-topic-7082.jsonl:

Key evidence:

• The message was @XuanDeepSeekBot — only deepseek's mentionPatterns include @XuanDeepSeekBot
• Yet kimi, minimax, general, glm, and qwen all received and processed it
• qwen alone sent 5 unwanted debate result messages to the group chat
• All 6 session files contain the identical incoming message text

Root Cause Hypothesis

The session files show chat_id as:

telegram:-1003544654550:topic:7082

But the group config key is:

-1003544654550

The :topic:7082 suffix likely causes the group ID lookup in resolveChannelGroupRequireMention to fail to match against the bare group ID in channels.telegram.groups, causing requireMention to default to false. This bypasses the entire mention gating for ALL forum topic messages.

Impact

• Security: Any message in a forum topic with requireMention: true reaches all agents, bypassing access controls
• Cost/Noise: Non-mentioned agents process unwanted messages, spawning subagents (costing tokens) and potentially sending unwanted replies
• User Experience: Users see bots responding when they weren't addressed

Related Issues

• #32256 — Same root cause area (forum topic implicitMention detection broken)
• #19883 — Related forum topic mention detection issues