~anthropic/claude-sonnet-latest → B (85:15)

Side B implements a substantial, cohesive feature (on-demand GitHub external resolver with a new system-ingest write path, cooldown state, URL identity normalization rewrite, and matching browser/unit tests) that adds real durable capability and fixes URL identity bugs across multiple modules. Side A is a focused but much smaller UI/CSS fix for vote-history slider highlighting, useful but narrow in scope and lasting impact compared to B's broader architectural additions.