Delete redundant, superseded, or design-log docs:
- qa-modes-bench-2026-04-30: prior snapshot (rolling journal is current)
- verifier-semantic-gap-design: unimplemented future proposal
- bench-emergent-design: stress-test design (script self-documents)
- modules.md: API reference (code + docstrings are source of truth)
- self-reference-design: v1 shipped, v2 scoped to future; history in git
- concept-relations-design: live system documented in code
- mesh-deploy: runbook for off-by-default system; mesh wire future work
Reduces docs/ from 23 files to 16, keeping north-star (seven-point-program),
architecture (cti, mesh.md), and operational docs (benchmarks, qa-modes-bench,
bench-maxing). All deleted docs recoverable from git history.