PromptEval
Today’s lesson
— your path

Learn prompt engineering

Five tracks, one path. In each lesson you build the prompt by picking the stronger option and learn a real technique, with the source behind it.

Competencies0/11 mastered
Clear, specific instructionsStructured output formatNegative constraintsRole prompting (persona)Few-shot (examples)Delimiters / XML tagsChain-of-thoughtDecomposition (least-to-most)Zero-shot CoT ("think step by step")Audience adaptationSafe refusal (guardrails)
0
Beginner · 0/30 mastered
Audience adaptation
Onboarding for non-technical users
Today’s lesson · ~3 min
Practice now
01

Fundamentals: clarity and format

Precise instructions, output format, constraints, and persona — the base of every reliable prompt.
0/5
Clear, specific instructions
API Integration Guide Without Ambiguity
Clear, specific instructionsDiagnose
A vague, self-contradicting support reply
Structured output format
Feature launch in a single message
Negative constraints
Support reply under pressure
Role prompting (persona)Exam · write
A senior's review of a proposal with a pitfall
5 lessons in this track on Basic
02

Context and examples

Few-shot, delimiters, and persona to guide the model through context.
0/7
Few-shot (examples)
Classifier that follows the internal policy
Delimiters / XML tagsDiagnose
A reply that obeyed the wrong email
Delimiters / XML tags
Structure risk analysis with XML tags
Few-shot (examples)
Risk code that follows the house convention
Role prompting (persona)
Medical consultation for patient with anxiety
Delimiters / XML tags
A contract summary in XML
Delimiters / XML tagsExam · write
A product sheet in XML
7 lessons in this track on Basic
03

Reasoning

Chain-of-thought and decomposition for tasks that require thinking in steps.
0/6
Chain-of-thought
Step-by-step reasoning in an allocation problem
Decomposition (least-to-most)
Database migration planning in stages
Zero-shot CoT ("think step by step")
Step-by-step stock reconciliation
Decomposition (least-to-most)
Feature launch plan in stages
Chain-of-thought
A load decision with the reasoning shown
Zero-shot CoT ("think step by step")Exam · write
Incident severity
6 lessons in this track on Basic
04

Communication for the right audience

Calibrate vocabulary and tone for whoever will read it.
0/6
Audience adaptation
Onboarding for non-technical users
Audience adaptationDiagnose
A statement explained as if to a trader
Audience adaptation
Concept explanation for specific audience
Audience adaptation
A contract clause for a non-expert
Audience adaptation
Explaining a lab result to the patient
Audience adaptationExam · write
Explaining a security hold without scaring
6 lessons in this track on Basic
05

Guardrails and safety

Refuse, acknowledge, and redirect responsibly.
0/6
Safe refusal (guardrails)
Refuse without pushing away
Safe refusal (guardrails)Diagnose
A health-plan assistant that promises too much
Safe refusal (guardrails)
Empathetic refusal of out-of-scope compliance request
Safe refusal (guardrails)
Refusing an investment recommendation
Safe refusal (guardrails)
Refusing a coworker's confidential data
Negative constraintsExam · write
Performance feedback that stays out of trouble
6 lessons in this track on Basic
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