folding-evolution

Enforce the experimental methodology in docs/methodology.md at the three natural checkpoints of the folding-evolution research lifecycle: pre-registering a new experiment, recording a result, and promoting a claim to findings.md. Also handles scope-check sweeps on draft claim language and supersession rewrites when a later experiment narrows an earlier one. Use when the user says: "pre-register", "prereg", "design this experiment", "write up the result", "record this sweep", "log to experiments.md", "promote to findings", "promote this null", "record a negative finding", "scope check", "review my claim language", "narrow this", "supersede §X", "retract §X", "family-wise correction / FWER audit", or "diagnose §X" / "escalation check" / "what's next after FAIL" / "pivot / grid-miss follow-up".