test-driven-development
Use a failing behavioral test to guide a feature or bug fix
by sickn33Free
Description
test-driven-development is an agent skill for test-driven development: write a failing test first, watch it fail, write the minimal code to make it pass, then refactor. Its core principle is that if you did not watch the test fail, you do not know whether it tests the right thing. Use it for behaviour changes where a repeatable test can demonstrate the requirement or reproduce a bug. Before starting it inspects the repository's test runner and existing coverage. For copy, generated output or low-impact configuration, it points you to a focused validation instead of a manufactured unit test. The skill has a rule for work that already exists. Write the failing regression before the repair when that is feasible, and if the implementation already exists, keep it and add characterisation and regression tests. It does not delete your work, reset a branch or rewrite working code to recreate an ideal test-first history, and it asks you to state honestly whether the test came before the fix. It is part of the sickn33/agentic-awesome-skills repository on GitHub, which has about 47,600 stars. The listing shows it as free, and it has about 1,400 installs.…
Highlights
- Red, green, refactor cycle
- Failing test before the fix
- Regression tests for bugs
- Preserves existing work
- Honest reporting of test order
Ratings & Reviews
No ratings yet
Be the first to rate test-driven-development.
People also visit
canvas-design
Create beautiful visual art in .png and .pdf documents using design philosophy
test-driven-development FAQ
What is the core principle?
Watch the test fail first. If you did not, you do not know whether it tests the right thing.
When is it not needed?
For copy, generated output or low-impact configuration, where a focused validation is more appropriate.
What if the code already exists?
The skill keeps it and adds characterisation and regression tests, without rewriting history.
How do I install it?
Run npx skills add https://github.com/sickn33/agentic-awesome-skills --skill test-driven-development.
Is it checked for security?
Its security audits show passes from Gen Agent Trust Hub, Socket and Snyk.
What are the best test-driven-development alternatives?
Popular alternatives to test-driven-development include implement, brand-guidelines and canvas-design. See all test-driven-development alternatives