Cortex agents can now post files straight into Slack

When a Cortex agent creates a report or PDF, it can now post it into a Slack channel or direct message as a proper attachment, with a preview. Before, you'd get a link that expired after a while. Now the file stays in Slack for as long as you need it.

• A proper attachment: Files arrive with a preview.
• No expiring links: The file stays available.