Closing the loop with customers means showing them, not telling them. Two pieces shipped for that:
Release receipts
Any release can mint a public receipt — a tokened, shareable page listing what actually shipped in it. Send it to the customers who asked, link it from your announcement, paste it in the sales thread. It reads from the record, so it can't drift from reality.
The Transparency Ledger
A running, public-shareable ledger of your shipped releases — the honest changelog pattern, generated from the spine instead of maintained by hand.
And the loop runs backwards too
A new insight can now become a task in one motion — capture what a customer said and file the work against it, linked from birth. When it ships, the receipt closes the circle back to the person who asked.