New: Lean Formal Feedback Loop, mathematical proofs that catch real bugs

Formal verification put to work on practical Rust: use Lean theorem proofs to discover edge cases, validate invariants, and close conformance gaps that testing alone misses.

• Write Lean theorems that model your Rust code's invariants and constraints
• Triage proof blockers systematically when the prover gets stuck, classifying each by route
• Treat proof friction as evidence: a hard proof failure often points to a Rust defect, model drift, or a theorem that is scoped wrong
• One target at a time: attempt the proof, extract an executable witness and regression test, change one thing, re-prove, then pass a 7-check conformance review