SUSHANT GUNDLA · LEARN← the site
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A hands-on course · 10 lessons

Prompt Engineering

Instructions that hold up in production.

Past the tricks. How instructions actually land, which techniques survive contact with real traffic, how to validate what comes back, and how to stop a prompt edit from quietly breaking last week's behaviour.

Lessons run about five to eight minutes each and end with a short recall quiz, so you find out what stuck before you move on.

Part 1How instructions land

01

Why prompts fail

Three causes, one debugging order, and why telling it to try harder does nothing.

~7 min
02

The system prompt and the user turn

Which half of the request is the frame, and which half is the job.

~7 min
03

Examples beat explanations

Two worked pairs settle more than a paragraph, and settle it without argument.

~7 min

Part 2Techniques that hold up

04

Decomposition

Split one hard prompt into a few checkable ones — and know when not to.

~7 min
05

Thinking out loud

When reasoning before the answer earns its tokens, and when it just burns them.

~7 min
06

Output contracts

Stop asking for a format. Specify one, then make it impossible to miss.

~8 min

Part 3Making it reliable

07

Validating what comes back

Treat every response as an untrusted body, and catch the wrong answer before it reaches your database.

~7 min
08

Retries and fallbacks

Turn a validation failure into a second attempt the model can actually get right.

~7 min
09

Prompt injection

Why untrusted text can steer your app, and the defences that actually reduce the damage.

~8 min

Part 4Keeping it working

10

Versioning and testing prompts

Put the prompt in git, and get a number that tells you whether your last edit helped.

~7 min

Work through it in order the first time — each lesson leans on the one before it. After that, come back to any of them on their own.