Thursday, September 17, 2026
Don't plan with prompts
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Many developers are still just prompting and prompting -- not realizing how much this feature could take their Claude Code experience to the next level. |
Plan Mode transforms Claude into a clearly different kind of agent with a different objective. |
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Rather than immediately writing code, Claude shifts into a specialized, read-only, planning workflow designed to analyze, design, review, and document a solution before a single file is even touched -- |
And this ends up improving code quality and saving AI generation costs in the long run in the most complex projects -- among other benefits. |
Back then I would just give Claude a prompt like, "tell me how you're going to do this first" at the end of my task prompt. |
But trying to "plan" like this has some key issues that make it inferior to this built-in Plan Mode. |
1. Plan Mode: Higher-quality code by giving Claude a different way of thinking |
For one when Plan Mode is enabled, Claude receives a different set of specialized instructions that fundamentally change how it approaches problems. |
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Instead of optimizing for just code generation, it optimizes for planning in four distinct phases. |
Initial Understanding: Explore the codebase and identify relevant files and dependencies. Design: Evaluate implementation approaches and trade-offs. Review: Validate the proposed design against the realities of the codebase. Final Plan: Produce a concise roadmap explaining what should change and why.
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It's clearly a much more sophisticated way to plan than just a simple prompt. |
2. Prevents excess token costs by using specialized planning models |
This is another key difference. |
Trying to plan with normal prompting can cost you a lot of tokens, especially in an existing, large codebase. |
Going through all the files in a major codebase can consume a huge amount of context and tokens. |
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