# Phase 18: Ethics, Safety & Alignment

> Build AI that helps humanity. Not optional.

## Start this phase on GitHub

**Prerequisites:** Phase 10 Lessons 06, 07, and 08 on SFT, RLHF, and DPO.

**First lesson:** [Instruction-Following as Alignment Signal](01-instruction-following-alignment-signal/)

Run this command from the repository root:

```bash
python3 phases/18-ethics-safety-alignment/01-instruction-following-alignment-signal/code/main.py
```

Keep the command, exit code, policies with and without the KL penalty, reward
and KL trajectories, and one sentence naming the proxy failure you observed.

**Next action:** Change the KL coefficient, predict policy drift, then continue
to [Reward Hacking and Goodhart's Law](02-reward-hacking-goodhart/).

Browse the [full Phase 18 lesson list](../../README.md#phase-18) or the
[cross-phase roadmap](../../ROADMAP.md).