Can a prompt replace Canny?

Build a public feature-request board whose distinguishing feature is deduplication.

The board itself is ordinary: anyone can post a title and description, vote once per post, and comment. Posts carry a status — open, planned, in progress, shipped, declined — and the public roadmap is just a filtered view of that field.

The part worth building well: when a new post is submitted, embed its title and description, compare against existing posts with cosine similarity, and if anything crosses a threshold, show the poster the near-duplicates before they submit, with a "this is my request too" button that votes on the existing post instead of creating a new one. Deflecting the duplicate at submission time is far more effective than merging afterwards.

For the ones that get through, give the admin a merge action that moves votes, comments and requesters onto the surviving post, keeps the merged titles as aliases so search still finds them, and is reversible. An irreversible merge on a wrong guess destroys signal you cannot recover, so store the merge as a link rather than deleting the row.

Email every voter on a request when its status changes, in one batched message rather than one per post, and always with an unsubscribe link. This closing of the loop is the reason people post at all.

Spam is the operational reality of a public board: rate-limit by IP, require email confirmation before a post appears, and hold first-time posters for review.

Out of scope: integrations with support tools, revenue attribution, single sign-on. Show vote counts as counts, never as a priority score — the moment a board ranks by votes, the roadmap belongs to whoever organised a campaign.