Prompt Engineering - lesson 7 | HackIndia Skills

Prompt Engineering - lesson 7 | HackIndia Skills | HackIndia

Example

Simple failure check

Here is a small JavaScript check for a project that suggests college event plans. It catches answers that look valid but miss important constraints.

Use checks like this after the model response, before showing it as final.

function checkEventPlan(input, output) {
  const failures = [];

  if (!output.title || !output.schedule || !output.budgetNotes) {
    failures.push("missing_required_field");
  }

  if (input.budgetRupees && output.estimatedCostRupees > input.budgetRupees) {
    failures.push("over_budget");
  }

  if (input.collegeHours && !output.schedule.includes(input.collegeHours)) {
    failures.push("ignored_college_hours");
  }

  if (output.confidence === "high" && output.sources?.length === 0) {
    failures.push("high_confidence_no_sources");
  }

  return {
    ok: failures.length === 0,
    failures
  };
}

const input = {
  budgetRupees: 5000,
  collegeHours: "after 4 PM"
};

const output = {
  title: "AI Workshop",
  schedule: "10 AM to 1 PM",
  budgetNotes: "Can be done with sponsor support",
  estimatedCostRupees: 8000,
  confidence: "high",
  sources: []
};

console.log(checkEventPlan(input, output));
// { ok: false, failures: ["over_budget", "ignored_college_hours", "high_confidence_no_sources"] }

Log bad cases

Keep a small failure log in your repo. This helps judges and recruiters see that you tested real cases, not only one perfect demo.

Include the input, the bad output, the failure type, and what you changed.

case_id,input_summary,failure_type,fix
1,"User asked for ₹300 meal plan",over_budget,"Added budget check and retry prompt"
2,"User gave no deadline",invented_deadline,"Prompt now asks model to say deadline missing"
3,"User wanted Hindi answer",ignored_language,"Added language field validation"

Spot Quiet Prompt Failure

The core idea

What it looks like

Do not trust polish

Check four signals

Simple failure check

Ask AI to help

Log bad cases

Do this now

Quick check