Tracks · Learn Claude
Prompt injection and AI security — how do you stop it?
You stop prompt injection with boundaries in code, not with better wording — and you find out whether Claude is right by building an evaluation set, not by reading the answer and feeling confident. This track covers hallucination controls and why grounding beats warning the model, guardrails that live in your code rather than in the prompt, secret hygiene, audit trails, and red-teaming your own assistant before someone else does. Assumes Prompting.
What is prompt injection, and can you prompt your way out of it?
Prompt injection is any instruction that reaches Claude through text you did not write — the document you asked it to summarise, the web page it fetched, the tool result it read. You cannot prompt your way out of it, because the defence has to hold when the model is persuaded. This track works the real controls: untrusted-input boundaries, guardrails in code rather than prose, exfiltration paths that open the moment an assistant has both untrusted input and a tool, and red-teaming your own assistant before someone else does.
What you learn in this track
Evaluations & regression testing
Without an eval set you cannot tell an improvement from a lucky run.
Hallucination controls
Claude hallucinates most where it is least uncertain-looking, which is why grounding beats warning it not to.
Guardrails & content policy
Guardrails belong in your code, not only in your prompt — a prompt can be talked out of things.
Prompt injection & data exfiltration defense
Prompt injection becomes data exfiltration the moment your assistant has both untrusted input and a tool.
Access controls & secret hygiene
Never take the user identity from tool input; derive it from the verified token.
Audit trails and observability
If you cannot reconstruct why the model said what it said, you cannot fix it.
Red-teaming your assistant
The fastest way to find out how your assistant breaks is to attack it yourself, on purpose.
Guides in this track
How the Socratic coach teaches this
Each module is a Socratic dialogue: the coach probes your reasoning with scenario questions, surfaces weak points, and generates flashcards and study notes from your own gaps. Mastery is tracked per concept, so you can see which ideas you actually handle and which ones still need work.
See where this track sits in the curriculum on the six tracks and why they are in this order, or open the ClaudeMaster.ai hub to start it.