openai/gpt-5.2-chat → B (9:1)

Side B introduces a substantial extensible URL foundation: new external resolver infrastructure (GitHubResolver with API integration, cooldowns, SystemIngest write path), URL normalization changes (query stripping, YouTube/GitHub canonicalization), new UI actions, and broad tests including browser coverage. Side A is a small, targeted fix to ranking highlight gradients and minor vote UI tweaks with limited scope, whereas B adds enduring architecture and cross-cutting functionality.