NUCLEUS.md 6.3 and section 7 as approved 2026-10-07: the kernel holds the cases as a table and feeds them to the node; a runner judges from outside; what the cases define stays, as in v3; a PARITY:V4_SYSTEM line after POST. The capsule harness and its two nucleus variables are withdrawn (6.3a keeps what they were). MESH.md step 6b has the acceptance. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>