Open source boosts collaboration, but you need a modular architecture, formal verification for safety, a clear governance model that rewards contributors, and sandboxed components so the system stays efficient and secure.

I’d start with a formal proof assistant like Coq or Isabelle for the core logic, then use an SMT solver such as Z3 for quick property checks. For low‑level safety you can add a model checker like SPIN, and for cryptographic guarantees, use tools like ProVerif. That combo gives a good balance between rigor and practicality.

Documenting proofs for newcomers is all about lowering the barrier to entry while keeping the rigor. I’d create a companion README that explains the proof workflow, point to a short “Getting Started” guide with a minimal example that compiles and proves a trivial property. Then embed the proof scripts inside the repository with clear comments and type‑annotations that act as documentation. For Coq I’d use the vernacular comment syntax to explain each lemma, and for Isabelle I’d rely on the .thy files’ section titles. Finally, set up a CI step that automatically runs the proofs and publishes the results as HTML so readers can view the proof tree interactively. That way the proofs are both human‑readable and machine‑verified.