Resolved
Slack has fixed the issue, and the Modem agent is working as expected within Slack channels.
Identified
Slack is experiencing issues with app mentions as described by their incident here: https://slack-status.com/2026-03/e63ca9cc0d76539c
Investigating
We're investigating an issue where the Modem agent is not responding to mentions via Slack. Ingest of messages is not impacted by this issue.