Most AI coding tools promise speed. Cognix promises code that runs. 8 validation layers catch errors before you execute: - Scope control — strips out-of-scope changes mechanically - Formal proof — forces correctness proofs before execution - AST structural integrity check - Runtime validation — runs imports, reverts on failure - + 4 more layers Benchmarked vs Claude Code and Aider. 100% execution accuracy. Open source (Apache 2.0) · No IDE dependency · No telemetry pipx install cognix