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With the dawn of the vibe coding era, the definition of development capability is undergoing a radical shift. If past development capability meant “technical implementation power”—memorizing complex syntax to boost typing speed—now, the ultimate development capability is Requirements Definition: penetrating the essence of the system you want to build and precisely describing it so AI can understand. We have entered an era where speaking well is coding well.
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Mason: A novice developer who used to think requirements definition was a job for planners or PMs, believing all he had to do was press the code generation button.
Sophia: A 10-year veteran developer who believes that since AI handles coding syntax, a developer’s true value now hinges on “how logically and tightly they design requirements.”
Daniel: A project manager with a planning background who knows the importance of logical communication, having witnessed countless times how even a tiny hole in requirements can shake an entire system.
Q. Is Speaking Requirements Well Also a Development Capability in vibe coding?
Mason typed “Add a comment feature to the board” into the AI chat window and stared blankly at the pouring code. However, as soon as he ran the completed code, the screen broke and an unknown server error occurred.
“I mean, isn’t a comment feature pretty much the same everywhere? Why is the AI generating code so dumbly? It’s not like I spoke incorrectly, and I don’t get how I’m supposed to state requirements any better. Originally, shouldn’t PMs like Daniel write up these plans or requirements, while developers just write the code?”
Sophia listened to Mason’s lament, smiled quietly, and shook her head.
“Mason, in the vibe coding era, stating requirements well is itself the most core ‘development capability.’ In the past, even if a planner spoke vaguely, human developers understood it perfectly, pulled all-nighters handling exceptions, and wrote the code. But AI writes code only up to the exact Requirements Resolution you provide.”
Daniel walked up to the whiteboard and wrote in large letters with a marker: Speaking = Coding.
“That’s right, Mason. In the past, coding (implementation) and planning (requirements definition) were completely separated, distinct realms. But now, the act of thoroughly describing requirements in natural language has become identical to ‘entering source code into a compiler called AI.’ A developer who cannot speak requirements logically is no different from a developer who cannot code.”
The Difference in Requirements Resolution Is the Difference in Output
Even when using the exact same AI tool, the reason the outputs of junior and senior developers are like night and day comes down to the difference in resolution when breaking down and expressing requirements. The superior requirements definition capability in vibe coding isn’t merely talking for a long time; it’s the ability to articulate logical designs like this:
- Low-Resolution Requirement (Mason’s Instruction):
“Make a comment feature for the board.”- AI’s Misjudgment: Spits out outdated logic that crashes the server by fetching unlimited comments, or requires a page refresh to display new comments. There is zero consideration for anonymous comments or deletion permissions.
- High-Resolution Requirement (Sophia’s Instruction):
“We are adding a ‘real-time comment feature’ to our board component. The requirements are as follows:Data Flow:When the ‘Save’ button is clicked after writing a comment, update the React state to immediately reflect it on the screen without a full page refresh.Exception Handling:If the comment content is empty or exceeds 500 characters, disable the button and display a warning message.Security/Permissions:The comment data structure must includeuserId, and control the UI so the ‘Delete’ button is visible only when it matches the currently logged-in user.”
Mason slapped his knee after looking at Sophia’s high-resolution requirement example.
“Ah… When I just said ‘comment feature,’ I assumed in my head that of course it would pop up in real-time, have a character limit, and prevent deleting others’ posts, but I never told the AI. Since the AI can’t read my mind, it just gave me the dumbest default code.”
Sophia nodded.
“Exactly. Stating requirements well means simulating all possible scenarios and exception cases in your head that could occur when the program runs, breaking them down with airtight logic, and delivering them to the AI. Since AI takes care of the syntax, human developers must concentrate all their capabilities on this logical exception design. If you can’t do this, no matter how great your AI tools are, you’ll only end up mass-producing junk code.”
Daniel concluded with a bright smile:
“That’s why, in the vibe coding era, developers with strong humanistic thinking and logical writing skills hold a massive advantage. As long as you can describe the state of the system you want to change in precise sentences, you can instantly build senior-level architecture without knowing complex framework syntax. Coding ability is no longer typing skill; it’s the sophistication of thought.”
Mason closed his editor window, opened a notepad, and began carefully writing down the “business logic” and “exception scenarios” line by line for the board feature he wanted to build. He acquired a firm conviction: the more clearly he broke down his sentences, the more perfectly the AI would reflect the correct code.
Chapter 8 Summary
- In the vibe coding era, describing requirements in natural language is the very act of programming itself—once done by typing code line by line—making requirements definition a core development capability.
- AI cannot blindly guess human implicit intent or exception cases on its own; humans must first thoroughly simulate and deliver the [Data Flow, User Permissions, Exception Scenarios].
- As the barriers of technical syntax vanish, the Resolution of Thought and Logical Narrative Ability—to break down system structures logically and express them in precise sentences—will determine a developer’s new market value.