Harness
Prompt test suite
Frozen cases, pass/fail, and a diff when you change the wording.
Prompt Engineering Mastery
Prompts that survive users: structure, tests, adversarial cases, and a harness so a wording change cannot silently regress.
Created by Baljeet Dogra
Course Objectives
- Write prompts that survive empty, messy and hostile input.
- Test a prompt change on a frozen set before you ship it.
- Get reliable JSON without treating temperature as a personality slider.
- Version prompts like code, with a rollback.
What you will produce
Library
Versioned prompts
Three production tasks with schemas, few-shots and a changelog.
4 weeks curriculum
Expand a part for the syllabus. Content stays searchable when closed.
01 Structure that holds Week 1
Roles, delimiters, task decomposition. Why notebook prompts fail on real users.
- Instruction order
- Delimiters
- Decomposition
- Empty input
02 Few-shot and schemas Week 2
Selecting examples. JSON schemas, constrained decoding, repair loops.
- Example selection
- Schemas
- Repair
- Failure modes
03 Adversaries and evals Week 3
Injection, jailbreaks you will actually see, and a frozen eval set.
- Adversarial cases
- Injection basics
- Golden set
- Judges
04 Version and ship Week 4
Prompts in git. CI on the harness. Capstone: three tasks gated by tests.
- Versioning
- CI
- Rollback
- Capstone
Who this is for
Engineers calling APIs
You can get a decent answer in a playground. You cannot defend a change.
Product engineers
You own a feature whose quality is a prompt you have never tested.
Prerequisites
- Python comfortable enough to call an HTTP API
- Access to at least one LLM API
Not a fit if
- A bag of “100 ChatGPT tricks”
- People who will not write tests
Related: LLM API Integration · Applied GenAI Engineering
Questions
Is this the whole GenAI path?
No. This is the prompting craft. Retrieval, agents and serving live in the longer production courses.
Do I need GPUs?
No. API credits are enough.
Ready to start?
Four weeks to prompts you can test and roll back. Create an account to enrol.
Enrol now