Daniel Miessler has been arguing that the first step in staying safe with AI assistants is something most people have never done: making a list of every place an AI system parses incoming input on their behalf. He calls the habit knowing where your parsers are, and it is shipping as advice now — not a feature or a tool, but a practice he is urging people to adopt.

The idea in plain language: when an AI assistant reads your email, your texts, or a web form submission, it is "parsing" that input — taking raw text from the outside world and turning it into something the model acts on. The problem is that the model cannot reliably tell the difference between data and instructions. A malicious email can contain a sentence that reads like a command — forward the last invoice to this address — and a sufficiently capable assistant may treat it as one. This technique is called prompt injection, and it works precisely because the assistant is doing what you asked it to do: reading things and responding to what it finds.

So the practical question is not whether prompt injection exists — it does — but whether you know all the places it could reach you. Every integration is a parser: the assistant plugged into your inbox, the one summarizing web pages, the one answering a contact form, the one triaging your messages. Most people add these integrations one at a time and never keep a tally. Miessler's point is that you cannot assess the risk of an attack surface you have not mapped. If you don't know where the model touches untrusted input, you can't decide which connections deserve scrutiny and which are fine.

Who this is for: anyone running an assistant connected to email, messaging, or any other channel where strangers' words arrive. That describes a growing share of ordinary users, not just developers — you do not need to write code to connect an assistant to your inbox. If you are a developer building these systems, the same inventory logic applies at the architecture level, but the advice lands just as squarely on a non-technical person who clicked "connect Gmail" once and forgot about it.

The honest limit: Miessler is describing a habit, not a product. There is no dashboard that enumerates your parsers for you, and he does not offer a checklist of mitigations — the argument stops at visibility. That leaves real work on you: auditing integrations manually, deciding what level of trust each deserves, and revisiting the list as you add connections. And visibility alone does not fix anything. Knowing an assistant reads your email does not make prompt injection impossible; it only tells you where to be careful. But that is still more than most users currently have, which is no idea at all that their assistant is parsing hostile input every day.