AI Tools don't replace expertise - they amplify it.
Think of AI as a power-tool in the hands of a craftsman: it doesn't make you the craftsman, but it magnifies what you can do when you already know your trade. This elevates your use of Cursor, Claude Code, Gemini CLI and others.
First, it's worth recognising what expertise brings to the table: domain knowledge, pattern-recognition, judgement, trade-offs, system-thinking.
When you're an engineer who has internalised core concepts - performance, scalability, reliability - you're not just running commands or following recipes. You're asking good questions, choosing the right abstractions, understanding context. AI tools alone don't understand context the way you do; they can generate options and surface patterns, but you still decide which path makes sense.
Second, when your expertise is strong, you can leverage AI tools much more effectively. If you know how to frame a problem, break it into sub-problems, assess options, apply constraints, test and iterate, then the AI becomes a multiplier.
For example, AI is used for a spectrum of code-gen, to reduce repetitive work, and explore large design spaces. But in order to exploit that speed you still need the skill to interpret the results, catch edge-cases, know when to trust the output and when to probe deeper.
Third, the trajectory isn't "tools will replace engineers" entirely but rather "tools will raise the ceiling of what engineers can do". AI frees us to focus on higher-level tasks rather than repetitive ones. So the message is: ramp your core engineering capabilities - architecture thinking, domain fluency, product impact - and then use AI to accelerate your reach and explore more ambitious outcomes.
Fourth, there's another dimension: the richer your skillset, the better feedback you can give the AI, and the better the AI becomes as a partner. If you are good at prompt-design (and more recently context engineering), good at crafting the right constraints, good at validating and refining outputs, then the AI contributes more. If instead you treat it like a black-box oracle, you risk mis-use or over-dependence. In engineering contexts, guardrails, interpretation and a critical eye remain vital.
In short: expertise is the foundation. AI tools are the amplifier.
The stronger the foundation, the louder the amplifier becomes. When you bring the skill, the judgment, the systems-level perspective, you unlock far more than you would by simply running the latest tool or model in isolation.
@simonw covers more on this in a recent write-up:
simonwillison.net/2025/Oct/7…