Show HN: Control Layer Demo for AI Coding Agents

This is an offline, deterministic demo in which a simulated agent proposes three fixed changes to a synthetic two-file fixture, and a simplified demo runtime applies one, holds one protected-file change for human approval, and refuses one out-of-scope change, with an independent check verifying the results and SHA-256 hashes. It requires only Node.js 18 or later, writes solely to a new .output/run-<date>-<random>/ folder containing report.json, and exits 0 for VERIFIED, 1 for NOT VERIFIED or an error, and 2 for NOT RUN. The agent is simulated with no model call, and the runtime is a simplified few-rule demo, not the proprietary Mintigate Runtime, and it does not run on your repository.