Tags as used in the chapter articles are of a form tag/TEXT. This format should not be used for anything else, so as to enable tag-searching via the general-purpose wiki search function. If it wasn't being done that way nobody could tell a Sayaka tag from a "After talking with Sayaka..."
THE ABSENCE OF A TAG FROM AN ARTICLE EQUATES TO THE ABSENCE OF THAT ELEMENT FROM THE CORRESPONDING CHAPTER. A COMPLETE LIST OF TAGS FOLLOWS.
tag/CHARACTERNAME -- the named character is present in the chapter. Characters among (Kyubey, Oriko, Kirika, Mami, Sayaka, Madoka, Homura, Kyouko, Yuma, Hitomi, Nagisa, Kyousuke, Walpurgisnacht) take the form of tag/Madoka or tag/Homura. Characters outside that set take the form of tag/LastnameFirstname, e.g. tag/MomoeShin. tag/Sabrina does not exist; Sabrina is in every chapter.
tag/CHARACTERNAME-meta -- the named character is referred to in the chapter in more than a passing manner but is not present in the chapter. Same formatting as tag/CHARACTERNAME. Examples: tag/Homura-meta, tag/MomoeShin-meta. Note that searching tag/CHARACTERNAME will return both tag/CHARACTERNAME and tag/CHARACTERNAME-meta tags. To exclude -meta tags, try searching tag/CHARACTERNAME -tag/CHARACTERNAME-meta.
tag/CHARACTERNAME-abil -- some facet of the named character's capabilities is displayed or explicated in the chapter. tag/Sabrina-abil DOES exist.
tag/GROUPNAME -- at least one character belonging to the group is present in the chapter. Only used for entities we actually refer to as groups; thus, there is no group for Kyouko and Yuma. There is no MitakiharaGroup tag, but this tag is formatted as tag/MitakiharaGroup.
tag/GROUPNAME-meta -- at least one character belonging to the group is referred to in the chapter in more than a passing manner but no character from the group is present in the chapter. Formatted as tag/MitakiharaGroup-meta
tag/Diplomacy -- the chapter contains diplomacy, which is defined as "negotiation with anybody who isn't directly part of Mitakihara Group."
tag/Introduction -- Sabrina introduces herself to one or more people.
tag/Infowar -- somebody learns something from Sabrina that they didn't know before in the chapter. This tag is a catch-all to be used for figuring out "Have we told this person about this?"
tag/Bombs -- this chapter involves one or more of the bombs being talked about directly, indirectly, in extreme abstract, etc. Metabomb, Lichbomb, Witchbomb, Loopbomb, Potentialbomb are the five recognized bombs for this tag.
tag/BOMBNAME -- as tag/Bombs but refers to a specific bomb. Will be applied to chapters alongside tag/Bombs. Formatted as tag/Metabomb.
tag/Infosec -- one or more information security measures were deployed in this chapter. "We kept our mouth shut" is not categorized under this tag, whereas "We used a privacy sphere" is.
tag/Characterization -- better described as "major characterization" than "characterization." Expect to see this only on chapters where major facets of people are in the open. Searching something like tag/Mami -tag/Mami-meta tag/Characterization should more or less produce a list consisting only of character-defining moments involving Mami.
tag/Critical -- one way or another this chapter matters too damn much, even considering all the other chapters that matter too damn much. In this category: threatening to witch Kirika, suggesting that Kirika's antimagic was purposed to turn off Oriko's precognition, explaining to Mami that she had really done hugely meaningful things for us on a personal level, etcetera.