--- title: The end of the prompt era: why the future of AI... description: Spec-Driven Development (SDD) is presented as a corrective to unstructured 'vibe coding', where developers accept AI-generated code without review. The piece... canonical: https://daily.dev/posts/the-end-of-the-prompt-era-why-the-future-of-ai-development-belongs-to-those-who-write-specs-sdd--t9kapfpm2 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: The end of the prompt era: why the future of AI development belongs to those who write specs (SDD) | daily.dev og:description: Spec-Driven Development (SDD) is presented as a corrective to unstructured 'vibe coding', where developers accept AI-generated code without review. The piece... og:url: https://daily.dev/posts/the-end-of-the-prompt-era-why-the-future-of-ai-development-belongs-to-those-who-write-specs-sdd--t9kapfpm2 og:image: https://api.daily.dev/og/posts/t9kApfPm2.png og:image:alt: The end of the prompt era: why the future of AI development belongs to those who write specs (SDD) og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # The end of the prompt era: why the future of AI development belongs to those who write specs (SDD) **[Codemotion](https://daily.dev/sources/codemotion)** · 10 min read · 1 upvotes · 0 comments ## Summary Spec-Driven Development (SDD) is presented as a corrective to unstructured 'vibe coding', where developers accept AI-generated code without review. The piece traces the vibe coding trend to Andrej Karpathy's tweets and explains 'context rot' - the degradation of model reliability as conversations grow longer, leading to inconsistent code and plausible but false hallucinations (like a fictional Array.shuffle() method). The proposed fix is writing structured specs (objective, non-goals, constraints, expected output) before generating code, optionally using the EARS requirements syntax from Rolls-Royce. A worked example shows a PHP 8.1 upgrade bug fixed in 30 minutes with a spec versus 2 hours of chat-based trial and error. The piece cautions that specs add overhead unsuitable for trivial tasks and require ongoing maintenance to stay accurate. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is Spec-Driven Development (SDD) and how does it differ from vibe coding? Spec-driven development is a methodology where a written specification, not a conversational prompt, drives AI code generation: you write the contract first (objective, non-goals, constraints, expected output), then have the AI generate code that satisfies it. Unlike vibe coding, where you iteratively prompt and accept AI output without review, SDD keeps requirements tracked in Git as a durable artifact rather than lost in chat history. _Developers weighing structured AI workflows against ad-hoc prompting can compare real approaches to spec-driven development on daily.dev._ ### What is context rot in AI coding assistants and why does it cause bugs? Context rot is the degradation of a language model's response reliability as more tokens accumulate in its context window during a long chat session. The model starts forgetting earlier decisions and constraints, leading to issues like ignoring a banned library or drifting between camelCase and snake_case conventions mid-project, ultimately producing spaghetti code across different chat sessions. _Anyone debugging inconsistent AI-generated code can dig into causes like context rot on daily.dev._ ### What is EARS notation and where did it come from? EARS (Easy Approach to Requirements Syntax) is a rigorous requirements-writing notation created by Alistair Mavin at Rolls-Royce in 2009 for jet engine requirements. It uses patterns like 'WHEN [event] THE system shall [action]' to map each requirement to a testable, logical constraint, and while not designed for AI, it works well to eliminate ambiguity when writing specs for AI coding agents. _Teams formalizing requirements for AI agents can explore techniques like EARS notation through daily.dev._ ## Similar posts on daily.dev - [Spec-Driven Development Handbook: Build the Right Software Before You Write the First Line of Code](https://daily.dev/posts/spec-driven-development-handbook-build-the-right-software-before-you-write-the-first-line-of-code-kfxfp4ruu) · Syncfusion · 1 upvotes · 1 comments - [From Vibe Coding to Spec-Driven Development](https://daily.dev/posts/from-vibe-coding-to-spec-driven-development-nsrmvcal8) · Towards Data Science · 0 upvotes · 0 comments - [Four cutting-edge tools for spec-driven development](https://daily.dev/posts/four-cutting-edge-tools-for-spec-driven-development-2dhiahwij) · InfoWorld · 2 upvotes · 0 comments - [Spec-Driven Development vs Vibe Coding: The Enterprise Framework for Scaling AI Software Delivery and Proving Its ROI](https://daily.dev/posts/spec-driven-development-vs-vibe-coding-the-enterprise-framework-for-scaling-ai-software-delivery-an-q7p7sbtdb) · Security Boulevard · 0 upvotes · 0 comments --- Tags: [#ai-coding](https://daily.dev/tags/ai-coding), [#prompt-engineering](https://daily.dev/tags/prompt-engineering), [#vibe-coding](https://daily.dev/tags/vibe-coding), [#spec-driven-development](https://daily.dev/tags/spec-driven-development) [View this post on daily.dev](https://daily.dev/posts/the-end-of-the-prompt-era-why-the-future-of-ai-development-belongs-to-those-who-write-specs-sdd--t9kapfpm2) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"The end of the prompt era: why the future of AI development belongs to those who write specs (SDD)","url":"https://daily.dev/posts/the-end-of-the-prompt-era-why-the-future-of-ai-development-belongs-to-those-who-write-specs-sdd--t9kapfpm2","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/the-end-of-the-prompt-era-why-the-future-of-ai-development-belongs-to-those-who-write-specs-sdd--t9kapfpm2"},"datePublished":"2026-08-27T13:06:32.942Z","dateModified":"2026-09-14T06:45:19.481Z","description":"Spec-Driven Development (SDD) is presented as a corrective to unstructured 'vibe coding', where developers accept AI-generated code without review. 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