Open-source local guardrail tool Axiom launches to intercept out-of-bounds writes by AI coding agents

Axiom is a local guardrail tool designed for AI coding agents, providing pre-write interception before tools like Claude Code and Cursor apply code changes. Requiring no external APIs, tokens, or third-party dependencies, it extracts constraints via regex and AST pattern matching and enforces blocks or user confirmations based on tri-state logic. The tool covers common accidental violations, such as out-of-range numerical values, hardcoded authentication bypasses, high-risk Bash commands, and credential leaks, though it does not defend against adversarial obfuscation.