Shuge Unlimited

Apr 6, 2026 · Artificial Intelligence

Inside Claude Code: How AI Uses Four Permission Modes and a Two‑Stage Classifier to Guard Itself

This article dissects Claude Code’s permission system, detailing the four exposed permission modes, the eight‑source rule hierarchy, the traditional Bash matching logic, and the sophisticated YOLO Classifier that employs a fast‑first‑stage and a deep‑second‑stage judgment to automatically approve safe actions while falling back to user prompts for risky operations.