1. Overview
  2. Building AI Apps
  3. Common Prompting Mistakes

Common Prompting Mistakes

Most wasted time in AI app-building comes from a small number of repeated mistakes.

The good news is that they are fixable.

Mistake 1: Starting Too Broad

Bad:

“Build a complete recruiting platform with AI screening, dashboards, messaging, interviews, analytics, and onboarding.”

Better:

“Build the first hiring workflow: candidate intake, resume upload, and initial AI fit scoring.”

Broad prompts create shallow systems.

Mistake 2: Being Vague About Problems

Bad:

“It’s not working.”

Better.

“When I create a new candidate record and refresh the page, the record disappears. Fix persistence only.

Specificity matters.

Mistake 3: Mixing Features and Fixes

This usually causes regressions and unnecessary rewrites. Fix one thing at a time.

Mistake 4: Skipping Business Context

If the AI does not know who the app is for and what it is trying to achieve, it will optimize for generic software.

Mistake 5: Interrupting the Build

Constantly redirecting the system mid-execution often produces inconsistent outcomes. Let it complete the requested step, then adjust.

Mistake 6: Expanding Before Testing

Broken systems do not improve by becoming larger.

Mistake 7: Asking for Pixel-Perfect Design Too Early

Structure first. Visual refinement later.

Real-World Example

For Roomify, asking for perfect AR visualization, eCommerce flows, styling, user profiles, and interior design recommendations in one pass is a mistake.

A better sequence is:

  • room visualization shell

  • furniture placement

  • save state

  • styling refinements

  • product catalog integration

Callout

Most AI build failures are process failures, not model failures.

Tips and Tricks

  • Keep a running list of next steps before prompting

  • Use short, exact bug descriptions

  • Always define “what good looks like”

  • Ask for one stable improvement at a time

Gotchas

  • assuming the AI remembers product strategy perfectly

  • adding “small asks” that are not actually small

  • not preserving stable checkpoints

  • letting every prompt become a brainstorm

Next Step

The next question is not just how to build, but how to build safely. That matters even more as apps move closer to production.

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