grenadeandClaude Opus 5
578a54ef87
The wormhole pulse was broadcast from inside `index_events`, which has two callers: `record`, for a block that just arrived, and `backfill`, walking history. So the backfill re-announced every block it re-read — and because it walks towards the tip, the blocks it re-announced were exactly the ones a viewer had just watched. The live console listed #43,446 three times. This is the live/backfill confusion this repository has already been bitten by twice, arriving by a third road, so the guard is a type rather than a comment: `Pass::Live` or `Pass::Backfill`, and a caller cannot forget to say which. The duplicates did more damage than repeating themselves. Console lines were keyed `height-index`, which looked unique and was not, and React given duplicate keys renders duplicates *and* stops honouring the list's own length cap — twelve lines had become eighteen on screen. Lines are keyed on a monotonic counter now, so a reorg re-recording a height cannot reproduce it. Neither half was caught by the build, the lint, or the tests. Both were obvious within a minute of watching the live page. Refs #17 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>