Frames the Rust system accurately — it's receiving parity work + infrastructure (Lance gauntlet, sidecar drop, observability parity), not just security fixes. Points readers at lakehouse/STATE_OF_PLAY.md + docs/ARCHITECTURE_COMPARISON.md for the cross-runtime view. Also commits today's parity probe report regenerations (5/5 still 32/32 post-Lance work). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>