What technical documentation have you used or created in your practice?

In QA practice and test automation, the following types of technical documentation are often used:

• Test plans — describe the objectives, scope of testing, resources, and timelines.
• Test cases — detailed testing scenarios with steps and expected results.
• Defect reports (bug reports) — record found errors with detailed descriptions and reproduction steps.
• Technical specifications — describe system requirements used for creating tests.
• Automation documentation — includes descriptions of the test framework architecture, instructions for running and maintaining tests.

For example, when automating API testing, documentation is created describing endpoints, request and response formats, as well as test examples.