Bug Description

When sessions_send triggers the announce step for a Telegram group topic session, the delivery fails with:

Error: Telegram recipient must be a numeric chat ID

Root Cause

resolveAnnounceTargetFromKey() parses the sessionKey agent:<name>:telegram:group:<chatId>:topic:<topicId> and generates to: "group:<chatId>".

However, normalizeTelegramLookupTarget() → stripTelegramInternalPrefixes() only strips the group: prefix if preceded by telegram: or tg:.

Since the announce target comes without that prefix, group: is NOT stripped, and group:-1003743251787 fails the numeric chat ID regex check.

Expected Behavior

Announce step should deliver agent response to the Telegram group topic.

Actual Behavior

Gateway log:

[ws] res send errorCode=UNAVAILABLE errorMessage=Error: Telegram recipient must be a numeric chat ID channel=telegram
[agents/sessions-send] sessions_send announce delivery failed

Suggested Fix

In resolveAnnounceTargetFromKey(), apply Telegram normalizeTarget on the to field, or update stripTelegramInternalPrefixes() to always strip group: prefix regardless.

Workaround

Agents post via Bot API directly using notify-topic.sh.

Environment

• OpenClaw 2026.3.13 (61d171a)
• Ubuntu 24.04 LTS