~x-ai/grok-latest → B (1:3)

B removes the dual legacy/Evidence code paths (_legacy_commit_row, projected GitDiscovery UI, optional Emission fields) so epoch/commit pages and the schema only trust Evidence envelopes— lasting architectural simplification with matching test updates. A is a correct, well-tested filter for stickied/pinned Reddit children, but it is a narrow import tweak with far less project-wide impact.