Lightweight technical documentation approaches
Agile teams need technical documentation that's just right, providing enough information for developers to understand the system without creating a maintenance burden that quickly becomes outdated.
Modern approaches like Documentation as Code treat documentation like source code, storing it in the same repository as the application code. This approach allows documentation to follow the same workflows as code, including version control, peer reviews, and automated testing. When documentation lives alongside code, it's more likely to be updated when the code changes.[1]
Automated documentation tools generate technical documentation directly from code, comments, and other artifacts. API documentation tools can create reference documentation from code annotations. Testing frameworks can generate living documentation from test cases. These automation approaches reduce the manual effort required to keep documentation current while ensuring accuracy. The key is focusing on high-value documentation that's essential for understanding the system, rather than documenting every detail that could be discovered by reading the code.
Pro Tip: Ask your team which parts of the system are most difficult to understand for newcomers, then focus your documentation efforts there first.