I feel like I almost grasp the fine differences between detail (countable), detail (uncountable) and details (plural only), but just almost. It's still a little difficult to spontaneously know whic...

Detail and details can be both countable and uncountable, though not necessarily at the same time. Countable: Here are all the details on price, games and extras. Countable: This enabled them to remember every detail of the story. Uncountable: He invariably remembers everything in great detail.

word choice - All the "details" or "detail"? - English Language & Usage ...

5 Details are a kind of information. They contrast with summary or overview information in that they provide supplemental information not necessary for a general understanding of the matter. Dividing information into a summary and details is not the only possible division, nor in many circumstances the most appropriate.

Therefore, " Here are the details you requested " is the correct one. Usage As noted by Colin Fine and Kosmonaut in their comments below and by Piet Delport in his answer, "here is [plural]" is commonly used in casual English. Maybe it is more used than the grammatical form where the subject agrees with the verb (to be confirmed).

Which form is correct: "in detail" or "in details"? I want to use it while describing an algorithm. First I give a general description of an algorithm and then more detailed description.