Inline Documentation Standards 
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Inline documentation provides a good resource for core developers in future development, and other developers when learning about WordPress. It also provides the information necessary to populate the WordPress developer code reference.
I don’t need to document my code. I wrote all of it – know it like the back of my hand.
“I would argue that, separately, documentation is also for you, the developer. I’ve found quite often that my inline documentation can be a very effective breadcrumb trail when establishing one’s own intent, particularly with regard to complex function arguments and usage. And it’s also helpful to return to a function two years later and find a paragraph in the inline documentation that describes, in meticulous fashion, something that I otherwise would have had to rediscover all over again.” – Nacin
Language-specific Standards Language-specific Standards
Resources Resources
- Inline documentation – why you should