@@ -185,7 +185,7 @@ just a mark: `/&c&b&/:path:/mark/`
185185Tall-form `/&` takes only two arguments: a mark and a horn. The mark does not
186186need to be enclosed in `/`'s: `/& html /elem/`
187187
188−### `/_` run a horn on each file in the current directory
188+### `/_` unfiltered: run a horn on each file in the current directory
189189
190190`/_` can be used in two ways: filtered and unfiltered.
191191
@@ -208,6 +208,10 @@ contents of the file through the `%hoon` mark, which validates that it's valid
208208hoon code and returns it unmodified. So, the resulting map associates basenames
209209with file contents.
210210
211+Wide-form unfiltered `/_` doesn't need a delimiter: `/= kids /_/hoon/`
212+
213+### `/_` filtered: run a horn on each file in the directory matching an aura
214+
211215Filtered `/_` takes an aura and a horn, and filters the list of files in the
212216current directory by whether their filenames can be parsed to an atom of that
213217aura. It then produces a map where each key is the filename after parsing into
@@ -223,6 +227,8 @@ produces a map from dates to cords. This product will only contain files whose
223227names are parsable into `@da` dates. The values are the file contents converted
224228to a cord of markdown-formatted text.
225229
230+Wide-form filtered `/_` uses `_` as a delimiter: `/= timed-posts /_@da_/md/`
231+
226232### `/;` operate on
227233
228234`/;` takes a twig and a horn. The twig should evaluate to a gate, which is then slammed