Punctilious

Max remained punctilious in documenting every transaction.

My grandmother was punctilious about table manners.

Dwarvish smiths are renowned for their punctilious craftsmanship.

With a punctilious slap of the gloves, the duel was now inevitable.

He was punctilious. According to those who worked with him, even his paperwork was the best they'd seen.

Of course, humans do not treat time in such a punctilious fashion.

Every editor at Merriam-Webster deals with the Black Books at many points during their tenure. The Black Books are the in-house set of rules for writing a dictionary (commonly called a style guide) as conceived and written in punctilious detail by the former editor in chief Philip Babcock Gove, for the creation of Webster’s Third.