The Problem
Daily Mailing List Digest Agent
Don't read 100 notifications. Read one briefing. The mailing lists you filtered into folders, summarized every morning into one email about what changed yesterday and what deserves your attention.
Before building it, we want to hear from people who live with this problem, including "Microsoft already does this, here's how" and "I tried that and it didn't work."
The Idea
The summary shows up on its own
An agent in your Microsoft 365 tenant that:
- reads only the folders you pick
- runs every morning on its own
- groups yesterday's messages by topic and ranks them by importance
- tracks topics across days, so it says what moved, not just what was said
- learns which topics you care about over time
- delivers one email to your inbox
Planned approach: a Microsoft 365 Copilot agent for setup, Microsoft Graph for reading the selected folders, and email delivery. That's one of the things we're asking about below.
Sample Digest
What one morning looks like
Built by hand from real public activity on Universal-Commerce-Protocol/ucp, the open specification for AI-driven commerce, on September 30, 2026. Imagine its GitHub notifications going to a folder you never open.
Theme
UCP is widening beyond shopping: Lodging is now publicly announced as a draft. Maintainers also cleared out old pull requests and published the first official guide for building UCP servers.
Key developments
The capability merged on Sep 24 (#780) and is now on the public site (#875). The proposal for structured cancellation schedules is still open (#807, #861): a short-term-rental operator posted a real policy that the draft can't fully represent, and the author is tightening the rules in response.
The first official walkthrough for businesses implementing UCP (#645). A backport to the 2026-08-25 release was opened the same day (#886).
Inventory signals (#403) were replaced by the newer low-stock / quantity / restock proposal (#605). Network-token and PCI-scope guidance (#367) was overtaken by the card-credential refactor. The agent rate-limit and MCP error PRs (#622, #620) need to be resubmitted on a clean branch.
Web Bot Auth interop (#829) and shopping permalinks (#828) were backported to the 2026-04-08 release.
A fix is proposed (#887, #884). Only matters if you build the docs.
Since your last digest
Media variants (images, video, external video, 3D) merged on Sep 29 (#690). You flagged product data as a priority last week, so this stays on your radar until it ships in a release.
Worth reading
- Draft "feed" capability for bulk catalog access (#866): reviewers are asking for usage terms on the feed and for delta updates. This is where catalog distribution to AI platforms is being decided.
- Cancellation schedule thread (#807): a clear real-world example of where a schema-valid policy can still be wrong.
Takeaway
If you sell or build on UCP: Lodging is officially in draft, and there's now a guide for building a server. If you had a PR waiting for review, check whether it was closed yesterday; the reason is in the closing comment.
Feedback
Should this exist? Tell us honestly.
Four questions, all optional. "No, Microsoft already does this" is a useful answer. About a minute.
Thank you.
Every response gets read. If you left an email, we'll write when there's a beta.
Know someone with an inbox full of filtered folders? Send them this page.