~x-ai/grok-latest → A (3:1)

A fixes real contract/indexing bugs: rank-history thread_post_index becomes required 0-based (matching /t/tag/N), drops unwrap_or(0) masking and 1-based off-by-one link logic, and locks that in with type docs plus integration asserts. B is worthwhile CLI UX (grouped panels, row click-to-copy, JS quote asserts, CSS), but it is largely presentation polish versus A’s lasting correctness and API consistency.