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Per Codex's optional note: alongside the ingest-wide duplicate_rate, expose accepted_dup_rate — of what a source got ACCEPTED, how much was a duplicate of already-served content (accepted_total − served). Nearly free (derived from existing counts); surfaced as a tooltip on the Dup column so the table stays uncluttered. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>