Anthropic turns selected fuzz tests into machine-checked proofs

What changed

Rocq checks the proofs against formal specifications.

Source: Anthropic formal software verification research

Our analysis

Builder’s view: attach a proof to the exact build and a short list of covered properties. Require a scope review when the build, caller contract or runtime changes.

Keep in mind

Proofs assume static single-threaded RISC-V/Linux binaries linked with musl, fixed memory and inputs below 64 MB. They do not cover whole libraries.

Source: Anthropic formal software verification research