Documentation

Documentation explains the reasoning behind decisions in a way code alone cannot. Operational knowledge helps future maintainers understand system design and prevent outages after a developer leaves. Tooling that auto-generates external documentation from inline code comments reduces the maintenance burden of keeping two sources of truth in sync. Clean, well-named code should not require narrative comments. Code that needs prose explanation is failing to communicate clearly on its own. Developers should clean up unfinished work and transfer critical knowledge before leaving a job. The minimum safeguard is making sure at least one other person can explain how the system works and what to do when it breaks. Documentation should capture design rationale, not only implementation details. Screen recordings can preserve workflows, architecture, and maintenance procedures for teammates. The team could not assist because system knowledge had not been documented or communicated. Code comments often compensate for unclear or messy code rather than improving it. Without documented reasoning, future maintainers inherit traps because they lack context. A launch or incident that depends on one…