diff --git a/docs/ptsd.json.5.scd b/docs/ptsd.json.5.scd
new file mode 100644
index 0000000..9520195
--- /dev/null
+++ b/docs/ptsd.json.5.scd
@@ -0,0 +1,95 @@
+PTSD.JSON(5) "git.sr.ht/~hauleth/ptsd" "File Formats Manual"
+
+# NAME
+
+ptsd.json - actions specification for _ptsd_(1)
+
+# SYNTAX
+
+The file should use JSON format with array as a top-level value. Entries of
+these values should be objects containing at least these fields:
+
+*location*
+	Directory which will be read for files.
+
+*filter*
+	Object that defines filter that will select files on which actions will
+	be performed. See _FILTERS_.
+
+*actions*
+	Array of actions to be performed on files. Actions will be performed
+	from top to bottom. *Moves are not followed*. See _ACTIONS_.
+
+# FILTERS
+
+Filters are in form:
+
+	{"type": "<filter_name>", <opts>}
+
+Available filters are
+
+*name*
+	Match name of the file against pattern. Available options (exclusive):
+
+	- *exact* - match name exactly
+	- *wildcard* - match name agains wildcard pattern
+	- *regex* - match name against regular expression
+
+*file_type*
+	Match OS type of the file.
+
+	Options:
+
+	- *is* - string that can be one of *dir*, *file*, *symlink* and will
+	  return if subject of the test point to file of that type
+
+*content_type*
+	Match agains content type.
+
+	Options:
+
+	- *mime* - will try to deduce MIME type of the file and will look for
+	  exact match
+	- *magic* - object with field *bytes* that is array of integers within
+	  range 0..255 that describe magic bytes that will be read from the file
+	  and matched. Optionally there can be also used option *offset* that
+	  describes offset from the beginning of the file for the pattern.
+
+There are also meta filters:
+
+*not*
+	Takes one option *filter* and returns success if filter failed and vice
+	versa.
+
+*all*
+	Takes one option *filters* which is a list of filters and will succeed
+	if and only if all filters in list are successful match.
+
+*any*
+	Takes one option *filters* which is a list of filters and will succeed
+	if any of filters in list is successful match.
+
+# ACTIONS
+
+Current set of actions that are supported:
+
+*{"script": "<path>"}*
+	Execute script located at _<path>_ with file name in the question passed
+	as first argument.
+
+*{"move": "<dest>"}*
+	Move file to directory pointed by the _<dest>_.
+
+*{"echo": "<msg>"}*
+	Show _<msg>_ next to the filename.
+
+*"trash"*
+	Move file to trash in platform dependant way.
+
+# AUTHORS
+
+Created and maintained by: Łukasz Niemier <#@hauleth.dev>++
+Sources available at: <https://git.sr.ht/~hauleth/ubin>++
+Patches and bug reports: <~hauleth/public-inbox@lists.sr.ht>
+
+; vim: noexpandtab
diff --git a/flake.nix b/flake.nix
index b159667..93d7b1a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -40,7 +40,7 @@
           };
 
           packages =
-            []
+            [pkgs.scdoc]
             ++ pkgs.lib.lists.optionals pkgs.stdenv.isDarwin (with pkgs.darwin.apple_sdk; [
               frameworks.Foundation
               pkgs.libiconv