Blog
The VibeMap Journal
Field notes on AI product planning, prompt engineering for PMs, and the pipeline behind VibeMap.
product-strategy
How to Pressure-Test a Product Idea: The 30-Minute Business Case
A lightweight business case template for builders. Pressure-test any product idea in 30 minutes, with a worked example, kill criteria, and the self-deceptions to avoid.
database-design
From User Stories to Database Schema: A Step-by-Step Method (With AI Shortcuts)
Turn user stories into a production-ready PostgreSQL schema in five steps: extract nouns, define entities, map cardinality, add constraints. Full worked example with SQL, plus a free database schema generator.
acceptance-criteria
Gherkin Acceptance Criteria for Non-Technical PMs: Given/When/Then Without the Jargon
Learn Gherkin acceptance criteria in plain English: 12 complete Given/When/Then examples across auth, payments, search, and edge cases, plus a bad-criteria rewrite gallery and a checklist for handing scenarios to AI coding agents.
user-stories
How to Write User Stories That AI (and Humans) Can Actually Build From: The INVEST Guide
Learn how to write user stories with the INVEST criteria: 8 real examples, bad-to-good rewrites, slicing tactics, and a checklist for AI-assisted builds.
acceptance criteria
AI Acceptance Criteria: What LLMs Skip, and the Prompt That Stops Them
LLMs write acceptance criteria that cover the happy path and quietly omit everything else. Here are the 12 edge-case categories they miss by default, the prompt that forces coverage, and how to review generated criteria.
AI app architecture
AI-Generated App Architecture: Pages, Schema, and File Structure from a Prompt
How to produce a scalable Next.js or React project structure, relational schema, and component inventory from a prompt without getting generic scaffolding. With working examples and prompt templates.
AI code generation
Why AI-Generated Code Breaks in Production (With Real Failure Examples)
A catalogue of real failure modes in AI-generated code: component duplication, schema drift, missing failure paths, and more, with code examples and what actually prevents each one.
AI PRD generator
AI PRD Generator: Free Templates, Prompts, and When a PRD Is the Wrong Tool
Three free copy-paste PRD templates (lean, standard, and agency-grade), the prompts that produce each from a plain-English idea, and an honest look at where the PRD format breaks down.
AI product planning
How to Generate an App Spec from a Prompt (Complete Guide)
The exact pipeline for turning a plain-English product idea into a complete app specification: personas, features, user stories, acceptance criteria, schema, and pages. With prompt templates and working examples.
persona generator
AI Persona Generator for Product Teams: Templates, Prompts, and How to Spot Fiction
How to generate credible user personas with AI without the 'Sarah the Marketer' stock characters. Includes the exact prompts, a five-question audit, and an honest take on when AI personas are not enough.
prompt engineering
Prompt Engineering for Product Managers: 10 Copy-Paste Templates That Produce Real Specs
Ready-to-use prompt templates for the work PMs actually do with LLMs: customer segments, prioritisation, competitive research, interview synthesis, stakeholder updates, and retros. With the constraints that stop output drifting generic.
AI product management
Generating User Stories with AI: The Critique Loop That Makes the Output Usable
Getting user stories out of an LLM is easy. Getting ones you would hand to a developer takes a second pass. Here is the generate, critique, and refine loop, plus the failure signatures specific to AI-written stories.
AI product management
The ROI of Planning Before You Prompt: What the Evidence Actually Shows
Everyone quotes the same statistic about planning saving money. It is shakier than it looks. Here is what the research on AI-assisted development actually supports, and what it does not.
vibe coding
What Is Vibe Coding? What Karpathy Actually Said, and What the Term Became
Vibe coding was coined to describe throwaway weekend projects. It got adopted by people shipping production SaaS. Here is the difference, why it matters, and how to tell which one you are doing.