[ibrahimsaleem]

Summary

In forum supergroups, Telegram sets reply_to_message on every ordinary message in a
topic to the topic's forum_topic_created service message. When the bot created the
topic (for example via createForumTopic), that service message is authored by the bot.
As a result, normalize treats every message in the topic as a reply to the bot, and a
group bot responds to all conversation in that topic instead of only to messages
addressed to it.

Change

normalize now ignores a reply whose target is the topic's creation message. Explicit
replies to the bot's regular messages are still treated as addressed, and mention and
command handling are unchanged. The Python binding uses the same Rust function, so both
are covered.

Testing

• Added a Rust unit test (bot_created_forum_topic_root_is_not_a_reply_to_the_bot) and a
  Python event test (test_topic_chatter_under_a_bot_created_topic_is_not_addressed).
  Both fail before this change and pass after it.
• cargo test --workspace, cargo clippy -- -D warnings, cargo fmt --check,
  pytest (529 passed), ruff and mypy all pass locally.

References

Other agent frameworks have reported and fixed the same behaviour:

• [Bug]: Telegram: bot-created forum topics make every message a 'reply to bot', bypassing require_mention NousResearch/hermes-agent#118678
• [Bug] Telegram Forum: implicitMention incorrectly triggered by topic system messages openclaw/openclaw#32256

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[ishaan-berri]

@ibrahimsaleem can you add screenshots of it working

[ibrahimsaleem]

Thanks for taking a look! Here's a live run in a Telegram forum group. The bot is an admin and created the topic itself, and examples/telegram_echo.py is running.

Before: upstream main. A plain message in the bot-created topic, which is neither a reply nor an @mention, still reaches the agent. Telegram attaches the topic's forum_topic_created message as reply_to_message, and the bot sent that message, so main treats it as a reply to the bot.

After: this PR, same topic. At 10:36, just chatting again is ignored. At 10:37, a real reply to the bot (thanks) is still answered. The 10:33 exchange at the top is the Before run.