Live validation checks the single event document being edited against the schema, but doesn't cross-check it against the other events already in the target repo's feed. A duplicate `id` (copy-paste, or two similar events) currently isn't caught until the feed is actually built/validated downstream.
Requested: warn inline (doesn't need to block submission — same non-blocking spirit as the spec's own recommended-profile warnings) when the `id` being drafted already exists elsewhere in the target repo's feed.
Live validation checks the single event document being edited against the schema, but doesn't cross-check it against the other events already in the target repo's feed. A duplicate `id` (copy-paste, or two similar events) currently isn't caught until the feed is actually built/validated downstream.
Requested: warn inline (doesn't need to block submission — same non-blocking spirit as the spec's own recommended-profile warnings) when the `id` being drafted already exists elsewhere in the target repo's feed.