Most people using Claude Code follow the same workflow: describe what you want, let it start building, debug whatever comes out.
There's a step most people skip entirely. And I think it's the most underrated part of building with AI.
It's called plan mode.
What Plan Mode Does
After you give Claude Code your project specs, you have a choice. You can let it immediately start generating code. Or you can hit Shift+Tab twice and switch into plan mode — at which point Claude stops and shows you the complete strategy before writing a single line.
What you see in the plan:
- The tech stack it intends to use
- The database schema it plans to build
- The file and folder structure it'll create
- The UI layout and component hierarchy
- The sequence of steps for building everything out
All of this is readable, reviewable, and adjustable before any code gets generated.
I was demonstrating this to Jacob during a live session — we were building a CPA command center app from scratch. We gave Claude Code the specs, switched to plan mode, and the plan came back showing exactly how it intended to build the project.
Right there, before any code ran, we could see where its interpretation didn't quite match what we'd meant. We adjusted those parts, confirmed the rest, and then let it build.
The build came out clean. Far less debugging than if we'd gone straight in.
Why This Matters More Than It Sounds
Here's the thing about AI coding tools: the output quality is entirely downstream of the input quality. If your spec is vague, the build will be vague. If the AI's interpretation of your spec is wrong, the build will be wrong.
The problem is you usually don't find out until after it's built — and by then you've spent compute budget and time on something you're going to have to redo.
Plan mode surfaces the AI's interpretation before it costs you anything. You can see whether it understood what you meant. If the plan shows it's going to use the wrong database structure, or build a different UI than you imagined, or skip a key feature — you catch it right there and fix the spec. Two minutes of adjustment versus hours of debugging broken output.
I learned this lesson the hard way early on. I gave Claude Code instructions that seemed clear to me, let it run, and came back to code that was architecturally sound but completely different from what I'd intended. The AI wasn't wrong — it built exactly what my spec described. My spec just hadn't described what I actually wanted.
Plan mode is how you close that gap.
The Blueprint Principle
There's an old idea in construction: the most expensive mistakes happen during building, not during planning. Changes to blueprints are cheap. Changes to walls are expensive.
AI coding has the same dynamic. Editing a plan takes seconds. Rewriting code that's been built the wrong way can take hours — and sometimes the architectural assumptions are so embedded you have to start over.
Plan mode is your blueprint review. It's the moment between “I described what I want” and “the machine starts building it” where you get to verify the machine understood you correctly.
The people I've coached who build cleanly and quickly with Claude Code almost all have this habit: they review the plan before they build. It slows the start by a few minutes. It saves hours downstream.
Building 100 PRDs
One thing I tell people who are getting serious about AI coding: if you build 100 PRDs, your prompting will naturally become exceptional. Not because you studied prompting techniques, but because you get feedback.
Every PRD and every plan review teaches you something. You start noticing the patterns in what Claude asks about or what the plan gets wrong. Next time, you already know how to describe it more clearly. The skill compounds.
Plan mode is part of that feedback loop. When you see the plan before building, you learn where your specs were clear and where they were ambiguous. Over time you get better at the front-end work — and the back-end builds start coming out right the first time.
How to Use It
The mechanics are simple:
- Open Claude Code and enter your project specs or task description
- Before pressing Enter to let it start building, hit Shift+Tab twice
- Claude will display the full plan for the build
- Read through it — does it match what you actually want?
- If something's off, clarify in the spec and ask it to replan
- Once the plan looks right, let it build
That's it. Two extra keystrokes and a few minutes of reading. For anything more than a trivial change, it's almost always worth it.
Plan mode is currently specific to Claude Code, but I expect other AI coding tools to adopt something similar — everyone who tries it loves it. The idea of seeing the strategy before the build is just obviously good. It's how thoughtful humans build things, and it's how thoughtful AI builds things too.
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