v1.96.0 — both harnesses run Opus 5 as designed

The maintainer's stated goal, promoted to next. Optimise the SINGLE shipped SKILL.md for Opus 5 (no per-model fork unless the audit finds CONTRADICTORY instructions — redundancy is a trim, contradiction is a fork), decide the byte-ceiling architecture, and record what the Claude Code harness itself is actually configured to. DONE WHEN: shipped guidance is Opus-5-correct and the CC harness config is written down and canonical.