| name | cron-auto-delivery |
| description | Cron jobs auto-deliver final responses to configured targets — send_message to the same target gets deduplicated and skipped. Print report content directly as final response instead. |
| metadata | {"keywords":["cron","send_message","auto-delivery","duplicate"]} |
Cron Job Auto-Delivery Behavior
The Gotcha
When a cron job has deliver configured (e.g., deliver: local or a specific platform channel), it automatically delivers the final response text to that target. Calling send_message_tool() to the same target within the same cron job results in:
{"success": true, "skipped": true, "reason": "cron_auto_delivery_duplicate_target", ...}
The message is silently skipped — no error, no delivery.
The Rule
If the cron job is already configured to auto-deliver its output to a target, do NOT also call send_message_tool() to that same target.
Instead, put the intended message content directly in the final print() / response — the cron delivery mechanism handles the rest.
When send_message IS needed in a cron
- Sending to a different target than the one configured for auto-delivery
- Sending a supplemental message to a different channel (e.g., cron computes stats, sends to Feishu, but also sends a Slack summary)
Feishu Content Formatting (飞书兼容性)
When a cron job delivers to Feishu, the prompt must explicitly forbid markdown tables — Feishu's API rejects {table} tags with error [230001] wrong tag:{table}.
Add this to the cron prompt for any Feishu-delivered job:
重要：最终回复禁止使用 markdown 表格（飞书不支持），用代码块或纯文本代替。
Also avoid other unsupported tags: HTML tables, {callout}, {tabs}. Safe formats: plain text, code blocks, bullet lists.
Verification
Tested on: feishu:oc_2abe398e83a9758c72451ed260170088
from tools.send_message_tool import send_message_tool
send_message_tool({'action': 'send', 'target': 'feishu:oc_...', 'message': report})
print(report)
Root Cause
The send_message_tool in /opt/hermes/tools/send_message_tool.py checks is_interrupted() which detects cron context and deduplicates sends to the cron's own delivery target.
