Support inbox digest to Slack with Gemini, every 10 minutes

PromptCreate

Build an agent workflow that sweeps my support Gmail inbox every 10 minutes and posts a digest of new unread threads to a Slack channel. Use Google Gemini to summarize each email and tag it with a priority.

Trigger: cron, every 10 minutes.

On each run, use Gmail List Messages to find unread messages in the inbox that do NOT already carry a Processed label (query something like `is:unread -label:Processed`). For each matching message, use Gmail Get a Message with the full format to pull the sender, subject, thread id, and body.

For each email, call Google Gemini Generate Content with model gemini-2.5-flash. Send the subject and body and ask Gemini to produce three things: (a) a two or three sentence summary written for a busy support lead, (b) the inferred customer sentiment, and (c) a priority tag with the value urgent, normal, or low.

Then use Slack Bot Send a Message to post one compact message per email to my team's support channel. Each message should include the sender, the subject, the priority tag, the short summary, and a link back to the original Gmail thread (https://mail.google.com/mail/u/0/#inbox/<threadId>). Keep formatting tight, use Slack mrkdwn, and never include the raw email body.

After posting each email to Slack, use Gmail Modify Message Labels to add a Processed label to that message so it never gets digested twice. If the Processed label does not exist yet, create it on first run.

If a run finds no new unprocessed emails, do nothing and finish silently. Do not post empty digests to Slack.

Make the Slack channel, Gmail search query, and Processed label name easy to change up top so I can point this at different inboxes and channels later.

Additional information

What does this prompt do?

Watches your support Gmail inbox for new unread messages every 10 minutes.
Uses Google Gemini to write a short summary and tag each thread as urgent, normal, or low priority.
Posts a compact digest to your team's Slack channel with sender, subject, priority, summary, and a link back to the original email.
Applies a Processed label in Gmail after posting so the same thread never shows up in Slack twice.

What do I need to use this?

A Gmail login that can see your support inbox.
A Google Gemini API key from Google AI Studio.
A Slack workspace and the channel you want the digest posted in.

How can I customize it?

Change how often it sweeps: every 5 minutes, hourly, or only during business hours.
Point it at a different inbox filter, like a specific Gmail label, sender, or search query.
Route urgent items to a separate escalation channel or an on-call DM instead of the shared channel.

Frequently asked questions

How often does the digest run?

Every 10 minutes by default. You can raise or lower the frequency to match your ticket volume.

Will the same email show up in Slack twice?

No. After posting, we apply a Processed label to the email in Gmail, and the next sweep skips anything already labeled Processed.

Can I filter which emails get picked up?

Yes. Point the sweep at a specific Gmail label, sender, or search query, and it only picks up matching threads.

Does the full email body get posted in Slack?

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