VR.dev – Open-source verifiers for what AI agents did
38 verifiers across 19 domains catch false successes before users do.

Gate-not-cage architecture proves the envelope, never models the inhabitant.
Formal methods researchers, AI safety engineers, programming language theorists
CakeML · VeriFast · F*
38 verifiers across 19 domains catch false successes before users do.
Cross-checks citations against 17 databases to catch AI-fabricated references instantly.
Lightweight A/B testing for SKILL.md files when LangSmith feels too heavy.
LLM-generated Lean 4 theorems that Mathlib actually proves — genuinely novel architecture.
Backend-only bot detection without CAPTCHAs or PII storage challenges Turnstile.
Deterministic offline tamper detection—pinned at capture, replayed without side effects.