I can’t say enough good things about “plan mode” in Claude Code.
When you’re building in plan mode, Claude works out the plan first for your approval before doing any actual implementation.
You get a high-level view of what Claude Code is proposing before a single line of code gets written. That means you can audit the architecture, push back on assumptions, tweak the scope, and iterate until it actually matches what you want.
Only then does it build.
But why does this matter?
Why Plan Mode?
After using Claude Code consistently for the past 2 weeks, two constraints keep showing up:
Credit consumption (Maybe because I’m on the Pro plan.)
Time for Claude to complete its tasked work
You’re going to face these two constraints no matter what.
If you’re vibe-building and the output goes in the wrong direction, you don’t just lose time. You burn credits. And then you burn more credits fixing what shouldn’t have been built in the first place.
The biggest surprise (in a good way) for me in plan mode is that Claude Code asks genuinely deep clarifying questions. The kind of questions and insights that honestly didn’t even occur to me when I was planning things out.
Not surface-level stuff, but structural questions that make you rethink what you’re actually trying to build. It really forces you to be precise instead of vague-prompting your way forward.
Actual Example: Building a “GTM-Brain”
As a GTM engineer, I’m very interested in building out my “GTM Brain.”
It’s essentially a system that:
Stores all of my GTM knowledge
Continuously ingests new knowledge (Substacks, YouTube, operator threads, etc.)
Distills that knowledge automatically
Synthesizes it against what I already know
Surfaces gaps, blind spots, and opportunities in my line of work
My biggest belief in the post-AI world is this:
Most roles can get from 0 → 90% efficiency by leveraging information that already exists, synthesizing it properly, and applying it to their context.
The key missing gap is the collection and synthesis of this data at scale, which is exactly what I’m trying to build my GTM Brain to solve.
Let’s take this as an example.
One thing I’ve always struggled with is: how do I “download” all the GTM information in my head into Claude Code?
I considered a few approaches. Creating a master file with everything I know. Dumping notes into one giant doc. But it quickly felt too manual and way too time-consuming.
When I used plan mode, Claude Code proposed “Option C,” which I really liked.
Instead of trying to write everything down upfront, it suggested running a structured Q&A / interview to capture my actual expertise. Almost like mapping my brain through conversation. Then combining that with my GTM-brain content to deepen topic coverage.