[zippolyon]

GStack is a brilliant setup for maximizing Claude Code's velocity. But if you are letting an agent run autonomously across your repos, velocity without constraints is terrifying.

We recently had Case #001: a Claude Code agent got stuck in a 70-minute loop, repeatedly injecting a staging URL into a production config file. Raw logs showed "exit code 0" (all green).

To fix this, I built K9 Audit — a deterministic, non-LLM causal auditing layer. It drops directly into .claude/settings.json (zero code changes, perfectly compatible with GStack). It records a cryptographically hashed 5-tuple of what the agent did vs what it was supposed to do.

If you're using GStack to speed up, use K9 Audit as your seatbelt. Repo: https://github.com/liuhaotian2024-prog/K9Audit