diff --git a/sh/archive b/sh/archive
index ab15032..73a0cb8 100755
--- a/sh/archive
+++ b/sh/archive
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# NO_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH NO_BASH NO_DASH NO_ASH
 
 archive() { ### @- create an archive file in one of a few formats.
     ### borrowed from [prezto.](https://github.com/sorin-ionescu/prezto)
diff --git a/sh/argc b/sh/argc
index 89ceda7..96b5c87 100755
--- a/sh/argc
+++ b/sh/argc
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 argc() { ### @- validate the number of arguments in a function.
     ### ```sh
diff --git a/sh/arith b/sh/arith
index 4008ee5..9a930a7 100755
--- a/sh/arith
+++ b/sh/arith
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # though technically compatible with other shells,
 # extra functionality is through zsh's extended arithmetic functions.
diff --git a/sh/arrays b/sh/arrays
index 3c486e1..c71c311 100644
--- a/sh/arrays
+++ b/sh/arrays
@@ -1,8 +1,5 @@
 #!/usr/bin/env false
-# YES_ZSH
-# YES_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH YES_BASH NO_DASH NO_ASH
 
 whoa=(
     -Wall
diff --git a/sh/aur b/sh/aur
index 5053ac5..ecdd422 100755
--- a/sh/aur
+++ b/sh/aur
@@ -1,9 +1,6 @@
 #!/usr/bin/env bash
 # http://aur.sh with massive feature creep
-# NO_ZSH
-# YES_BASH
-# NO_DASH
-# NO_ASH
+# NO_ZSH YES_BASH NO_DASH NO_ASH
 
 aur() { ### @-
     ### download, edit, make, and install packages from the
diff --git a/sh/autosync b/sh/autosync
index f741665..81e806a 100755
--- a/sh/autosync
+++ b/sh/autosync
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# NO_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH NO_BASH NO_DASH NO_ASH
 
 # TODO: portable way of dodging aliases to allow other shell support?
 
diff --git a/sh/bak b/sh/bak
index bbd0a78..3d79fe6 100755
--- a/sh/bak
+++ b/sh/bak
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 bak() { ### @-
     ### backup files by creating copies and appending ".bak" to their names.
diff --git a/sh/baknow b/sh/baknow
index 1fbc276..9991615 100755
--- a/sh/baknow
+++ b/sh/baknow
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 baknow() { ### @- backup files by appending their timestamps given by [`now`.](#now)
     ### ```
diff --git a/sh/baks b/sh/baks
index a10f776..bfacea9 100755
--- a/sh/baks
+++ b/sh/baks
@@ -1,9 +1,6 @@
 #!/usr/bin/env sh
 # backup, timestamped
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 baks() { ### @-
     ### backup files by copying each and appending *the current* date-time,
diff --git a/sh/bin b/sh/bin
index 7e25895..169b951 100755
--- a/sh/bin
+++ b/sh/bin
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # though technically compatible with other shells,
 # extra functionality is through zsh's extended arithmetic functions.
diff --git a/sh/busiest b/sh/busiest
index 02ee2a6..131185a 100755
--- a/sh/busiest
+++ b/sh/busiest
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# NO_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH NO_BASH NO_DASH NO_ASH
 
 busiest() { ### @-
     ### list directories in descending order by the number of files in them,
diff --git a/sh/colors b/sh/colors
index 5e8be78..1ad11f4 100755
--- a/sh/colors
+++ b/sh/colors
@@ -1,8 +1,5 @@
 #!/usr/bin/env bash
-# YES_ZSH
-# YES_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH YES_BASH NO_DASH NO_ASH
 
 colors() { ### @-
     ### display all combinations of foreground and background terminal colors.
diff --git a/sh/colors2 b/sh/colors2
index dcc15c0..3a0b262 100755
--- a/sh/colors2
+++ b/sh/colors2
@@ -1,8 +1,5 @@
 #!/usr/bin/env bash
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 colors2() {
     [ $# -eq 0 ] || { printf "%s\n" "$0: does not take arguments" >&2; return 1; }
diff --git a/sh/compile b/sh/compile
index 0f0da89..8f313e4 100755
--- a/sh/compile
+++ b/sh/compile
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# NO_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH NO_BASH NO_DASH NO_ASH
 
 setup_clang_ubuntu() { ### @-
     ### print (but don't execute) the commands necessary to install
diff --git a/sh/confirm b/sh/confirm
index 78e9940..6915823 100755
--- a/sh/confirm
+++ b/sh/confirm
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 ### @ confirm
 ### display a simple yes-or-no prompt and return 0-or-1 respectively.
diff --git a/sh/countdiff b/sh/countdiff
index 8140a13..04e8418 100755
--- a/sh/countdiff
+++ b/sh/countdiff
@@ -1,10 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
-# YES_BB_AWK
-# YES_OT_AWK
+# YES_ZSH YES_BASH YES_DASH YES_ASH YES_BB_AWK YES_OT_AWK
 
 countdiff() { ### @-
     ### count the number of lines changed between two files.
diff --git a/sh/cutv b/sh/cutv
index 3a062db..fa17275 100755
--- a/sh/cutv
+++ b/sh/cutv
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# NO_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH NO_BASH NO_DASH NO_ASH
 
 cutv() { ### @-
     ### (WIP) create a short clip of a long video file.
diff --git a/sh/dated b/sh/dated
index 818a91a..350c6f5 100755
--- a/sh/dated
+++ b/sh/dated
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 dated() {
     local ts= u=0
diff --git a/sh/days b/sh/days
index 712e176..1dc31a5 100755
--- a/sh/days
+++ b/sh/days
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 days() { ### @-
     ### compute the number of days since a given date.
diff --git a/sh/decently b/sh/decently
index 792b7b0..d95527c 100755
--- a/sh/decently
+++ b/sh/decently
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # TODO: check if this is compatible with busybox.
 
diff --git a/sh/dfu b/sh/dfu
index 5a13620..e6465dd 100755
--- a/sh/dfu
+++ b/sh/dfu
@@ -1,10 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
-# YES_BB_AWK
-# YES_OT_AWK
+# YES_ZSH YES_BASH YES_DASH YES_ASH YES_BB_AWK YES_OT_AWK
 
 dfu() { ### @-
     ### pretty-print `df` in GiB.
diff --git a/sh/disowned b/sh/disowned
index 0aa1f03..0d6cd00 100755
--- a/sh/disowned
+++ b/sh/disowned
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 disowned() { ### @- find files in system directories that aren't associated with any pacman packages.
     #
diff --git a/sh/e b/sh/e
index 529abd3..671fc9c 100755
--- a/sh/e
+++ b/sh/e
@@ -1,9 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
-# YES_BB_AWK
+# YES_ZSH YES_BASH YES_DASH YES_ASH YES_BB_AWK
 
 e() { ### @-
     ### wrap around `$EDITOR` to run it as root if necessary.
diff --git a/sh/ea b/sh/ea
index ab7cd88..b446796 100755
--- a/sh/ea
+++ b/sh/ea
@@ -1,9 +1,6 @@
 #!/usr/bin/env sh
 # remote file access (http file-sharing shenanigans)
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 __ea_curl() {
     curl -q --no-progress-meter 0.0.0.0 >/dev/null 2>&1
diff --git a/sh/echo2 b/sh/echo2
index 6ccb23a..d705944 100755
--- a/sh/echo2
+++ b/sh/echo2
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 echo2() { ### @-
     ### print arguments joined by spaces to stderr without parsing anything.
diff --git a/sh/explore b/sh/explore
index 86f8953..5801dd4 100755
--- a/sh/explore
+++ b/sh/explore
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 explore() { ### @- open a single directory in `explorer.exe`, defaulting to `$PWD`.
     [ -n "$MSYSTEM" ] || { printf "%s\n" "$0: only for MSYS2" >&2; return 1; }
diff --git a/sh/ff b/sh/ff
index 57f3d64..efef09c 100755
--- a/sh/ff
+++ b/sh/ff
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 ff() { ### @-
     ### select a file from a given or current directory using
diff --git a/sh/ghmd b/sh/ghmd
index e7f66fb..d895358 100755
--- a/sh/ghmd
+++ b/sh/ghmd
@@ -2,10 +2,7 @@
 # ghmd - format GitHub markdown
 # via: https://leahneukirchen.org/dotfiles/.zshrc
 # example: ghmd < README.md > README.html
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 ghmd() { ### @-
     ### convert a markdown file to HTML in the style of GitHub.
diff --git a/sh/glug b/sh/glug
index 5d0ad40..f60a635 100755
--- a/sh/glug
+++ b/sh/glug
@@ -1,8 +1,5 @@
 #!/usr/bin/env dash
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 # fuck termcap, all my homies hate termcap.
 
 glug() ( # note the subshell syntax. this allows us to abuse globals like crazy.
diff --git a/sh/grab b/sh/grab
index 964f811..fe9ea87 100644
--- a/sh/grab
+++ b/sh/grab
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 __grab() { ### @grab - download a file from my site and verify its integrity by its [minisign](https://github.com/jedisct1/minisign/) signature.
 [ -z "${ZSH_VERSION}" ] || emulate sh
diff --git a/sh/grop b/sh/grop
index f73a44b..e1c0bd6 100755
--- a/sh/grop
+++ b/sh/grop
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # TODO: check for existence of grep -P; write a perl-based fallback.
 grop() { ### @- invoke grep with `-oP`.
diff --git a/sh/grop4 b/sh/grop4
index 8381fa9..756abe7 100755
--- a/sh/grop4
+++ b/sh/grop4
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 grop4() { ### @- [`grop`](#grop) for IPv4s.
     grep -oP -- '(?<=^|[^\d.])((0|1\d\d|2[0-4]\d|25[0-5]|[1-9]\d?)\.((?2))\.((?2))\.((?2)))(?=$|[^\d.])'
diff --git a/sh/has b/sh/has
index 59777f1..ffa3c51 100755
--- a/sh/has
+++ b/sh/has
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 has() { ### @- [`have`,](#have) silently.
     if [ -z "$ZSH_VERSION" ]; then which -- "$1"; else whence -p -- "$1"; fi
diff --git a/sh/have b/sh/have
index ff42d9d..45e3690 100755
--- a/sh/have
+++ b/sh/have
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 have() { ### @- print the result of `which` if the program is found, else simply return 1.
     ### ```
diff --git a/sh/hex b/sh/hex
index 1c66b3f..2e4c8b3 100755
--- a/sh/hex
+++ b/sh/hex
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # though technically compatible with other shells,
 # extra functionality is through zsh's extended arithmetic functions.
diff --git a/sh/ify b/sh/ify
index 825a1c8..83307a6 100755
--- a/sh/ify
+++ b/sh/ify
@@ -1,8 +1,5 @@
 #!/usr/bin/sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 ify() { ### @-
     ### pipe one command through another, so you can still pass arguments to the former.
diff --git a/sh/is_empty b/sh/is_empty
index 5497048..3b41a3c 100755
--- a/sh/is_empty
+++ b/sh/is_empty
@@ -1,8 +1,5 @@
 #!/usr/bin/env bash
-# YES_ZSH
-# YES_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH YES_BASH NO_DASH NO_ASH
 
 is_empty() { ### @-
     ### return 0 if the directory given by argument is empty.
diff --git a/sh/isup b/sh/isup
index 823817f..0122bc6 100755
--- a/sh/isup
+++ b/sh/isup
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 isup() { ### @-
     ### return 0 if a given website returns a 2xx HTTP code.
diff --git a/sh/join2 b/sh/join2
index 427d717..3ac8743 100644
--- a/sh/join2
+++ b/sh/join2
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 join2() { ### @- join every other line.
     # TODO: argc, also better interface that allows n file inputs without stdin.
diff --git a/sh/lsarchive b/sh/lsarchive
index a19d290..dfa54c0 100755
--- a/sh/lsarchive
+++ b/sh/lsarchive
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# NO_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH NO_BASH NO_DASH NO_ASH
 
 lsarchive() { ### @- list the contents of an archive file in one of many formats.
     ### borrowed from [prezto.](https://github.com/sorin-ionescu/prezto)
diff --git a/sh/maybesudo b/sh/maybesudo
index 2ae70e6..b6efe90 100755
--- a/sh/maybesudo
+++ b/sh/maybesudo
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 __maybesudo() { ### @maybesudo
     ### mimic certain features of `sudo` for systems without it installed.
diff --git a/sh/minutemaid b/sh/minutemaid
index c757034..27f4243 100755
--- a/sh/minutemaid
+++ b/sh/minutemaid
@@ -1,8 +1,5 @@
 #!/usr/bin/env dash
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 minutemaid() { ### @-
     ### check if the current minute is divisible by a given number,
diff --git a/sh/monitor b/sh/monitor
index 2731ade..715cc93 100755
--- a/sh/monitor
+++ b/sh/monitor
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# NO_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH NO_BASH NO_DASH NO_ASH
 
 monitor() { ### @-
     ### this is [watch(1)](https://www.man7.org/linux/man-pages/man1/watch.1.html)
diff --git a/sh/morecolors b/sh/morecolors
index 1edc85c..46acc0a 100755
--- a/sh/morecolors
+++ b/sh/morecolors
@@ -1,8 +1,5 @@
 #!/usr/bin/env bash
-# YES_ZSH
-# YES_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH YES_BASH NO_DASH NO_ASH
 
 morecolors() { ### @- print all 256 colors that are available on most terminals.
     # borrowed from leah2's dotfiles.
diff --git a/sh/noccom b/sh/noccom
index 512feb2..859e5da 100755
--- a/sh/noccom
+++ b/sh/noccom
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # TODO: what's the minimum version of perl required for this?
 
diff --git a/sh/note b/sh/note
index d753da6..0d514a3 100755
--- a/sh/note
+++ b/sh/note
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 note() { ### @-
     ### act like [`echo2`,](#echo2) but use a bright color to stand out more.
diff --git a/sh/now b/sh/now
index 82c6193..3647556 100755
--- a/sh/now
+++ b/sh/now
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 now() { ### @-
     ### print a date-time (UTC) in a sortable format.
diff --git a/sh/oshi b/sh/oshi
index 8e954b5..5a3daed 100644
--- a/sh/oshi
+++ b/sh/oshi
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 __oshi() { ### @oshi
     ### upload files (or stdin) to [oshi.at.](https://oshi.at)
diff --git a/sh/oxo b/sh/oxo
index 84541ea..797c8be 100755
--- a/sh/oxo
+++ b/sh/oxo
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # **TL;DR RULES:**
 # * no executables (for the most part)
diff --git a/sh/pacbm b/sh/pacbm
index c61d747..8eba7b9 100755
--- a/sh/pacbm
+++ b/sh/pacbm
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # TODO: does this work with busybox awk?
 
diff --git a/sh/pause b/sh/pause
index 26a4c6c..7f79cec 100755
--- a/sh/pause
+++ b/sh/pause
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 ### @ pause
 ### pause — the companion script of [`confirm`.](#confirm)
diff --git a/sh/pegg b/sh/pegg
index 901bcfc..41019ca 100755
--- a/sh/pegg
+++ b/sh/pegg
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 pegg() { ### @-
     ### download and (pip) install a Python "egg" from a project on GitHub,
diff --git a/sh/pippy b/sh/pippy
index 41b3a87..280bf65 100755
--- a/sh/pippy
+++ b/sh/pippy
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 pippy() { ### @-
     ### install Python packages using pip,
diff --git a/sh/pre b/sh/pre
index 2b56604..2ca1dd9 100755
--- a/sh/pre
+++ b/sh/pre
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 pre() { ### @-
     ### dump all the `#define`s that `$CC $CPPFLAGS $CFLAGS $LDFLAGS` would result in.
diff --git a/sh/psbm b/sh/psbm
index f781276..b478169 100755
--- a/sh/psbm
+++ b/sh/psbm
@@ -1,9 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
-# YES_BB_AWK
+# YES_ZSH YES_BASH YES_DASH YES_ASH YES_BB_AWK
 
 psbm() { ### @-
     ### display and order processes by their memory usage ascending, and their sum.
diff --git a/sh/randir b/sh/randir
index 327374a..eaf483c 100755
--- a/sh/randir
+++ b/sh/randir
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # works with busybox.
 
diff --git a/sh/rot13 b/sh/rot13
index 28ee1d4..84b968a 100755
--- a/sh/rot13
+++ b/sh/rot13
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # works with busybox tr.
 
diff --git a/sh/rs b/sh/rs
index 849b06c..25efb21 100755
--- a/sh/rs
+++ b/sh/rs
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# NO_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH NO_BASH NO_DASH NO_ASH
 
 rs() { ### @-
     ### record screen. does not record audio.
diff --git a/sh/running b/sh/running
index a6589bb..5201ecf 100755
--- a/sh/running
+++ b/sh/running
@@ -1,9 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
-# YES_BB_AWK
+# YES_ZSH YES_BASH YES_DASH YES_ASH YES_BB_AWK
 
 # probably not compatible with busybox ps because its column 2 isn't PID.
 
diff --git a/sh/scount b/sh/scount
index 1fe7ff9..83c1a4f 100755
--- a/sh/scount
+++ b/sh/scount
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 ### @ scount
 ### perform `sort | uniq -c | sort -n`, preferring GNU awk when available.
diff --git a/sh/scramble b/sh/scramble
index e513553..a613880 100755
--- a/sh/scramble
+++ b/sh/scramble
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # does not work with busybox sed (yet?)
 
diff --git a/sh/scropt b/sh/scropt
index 4c9068f..b147fe2 100755
--- a/sh/scropt
+++ b/sh/scropt
@@ -1,8 +1,5 @@
 #!/usr/bin/env bash
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 scropt() { ### @-
     ### run `scrot` through `optipng` and save the result to `~/play/$(now).png`.
diff --git a/sh/shcom b/sh/shcom
index 1413a9e..0e74e44 100755
--- a/sh/shcom
+++ b/sh/shcom
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 shcom() { ### @-
     ### comment out text from stdin and wrap it in a markdown blockquote
diff --git a/sh/similar b/sh/similar
index ec80a3c..22dcaa7 100755
--- a/sh/similar
+++ b/sh/similar
@@ -1,9 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
-# YES_BB_AWK
+# YES_ZSH YES_BASH YES_DASH YES_ASH YES_BB_AWK
 
 similar() { ### @-
     ### highlight adjacent lines up to the first inequivalent character.
diff --git a/sh/slit b/sh/slit
index 570c482..86c59b9 100755
--- a/sh/slit
+++ b/sh/slit
@@ -1,8 +1,5 @@
 #!/usr/bin/env dash
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # works with busybox ash.
 
diff --git a/sh/slitt b/sh/slitt
index 4d9842c..abb4862 100755
--- a/sh/slitt
+++ b/sh/slitt
@@ -1,8 +1,5 @@
 #!/usr/bin/env dash
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 # works with busybox ash.
 
diff --git a/sh/sortip b/sh/sortip
index 370989b..28708cd 100755
--- a/sh/sortip
+++ b/sh/sortip
@@ -1,8 +1,5 @@
 #!/usr/bin/sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 sortip() { ### @- sort lines numerically by IPv4 segments.
     sort -t . -k 1,1n -k 2,2n -k 3,3n -k 4,4n "$@"
diff --git a/sh/sram b/sh/sram
index bb1993b..4640f8c 100755
--- a/sh/sram
+++ b/sh/sram
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# YES_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH YES_BASH NO_DASH NO_ASH
 
 sram() { ### @-
     ### convert between a couple saveram formats for N64 emulators.
diff --git a/sh/stfu b/sh/stfu
index c235d29..5fca20c 100755
--- a/sh/stfu
+++ b/sh/stfu
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 stfu() { ### @-
     ### invoke a command, silencing stdout and stderr *unless* the command fails.
diff --git a/sh/streamcrap b/sh/streamcrap
index 3d5a74c..b1898e9 100644
--- a/sh/streamcrap
+++ b/sh/streamcrap
@@ -1,9 +1,6 @@
 #!/usr/bin/env false
 # awful things
-# YES_ZSH
-# YES_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH YES_BASH NO_DASH NO_ASH
 
 mpvs() {
     mpv --quiet \
diff --git a/sh/sum b/sh/sum
index 0790c3a..2fe77ff 100755
--- a/sh/sum
+++ b/sh/sum
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 sum() { ### @-
     ### compute the summation of its arguments without forking processes.
diff --git a/sh/sv b/sh/sv
index 831c7f1..94f5d5a 100755
--- a/sh/sv
+++ b/sh/sv
@@ -1,9 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
-# YES_BB_AWK
+# YES_ZSH YES_BASH YES_DASH YES_ASH YES_BB_AWK
 
 sv() { ### @-
     ### collect the lastmost value of every key.
diff --git a/sh/trash b/sh/trash
index 1259ab5..d7994b7 100755
--- a/sh/trash
+++ b/sh/trash
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 trash() { ### @-
     ### output a given number of bytes from `/dev/random`.
diff --git a/sh/trunc b/sh/trunc
index ef6a4ea..0930f2e 100755
--- a/sh/trunc
+++ b/sh/trunc
@@ -1,9 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
-# YES_BB_AWK
+# YES_ZSH YES_BASH YES_DASH YES_ASH YES_BB_AWK
 
 trunc() { ### @-
     ### truncate text to fit within your terminal using the unicode character `…`.
diff --git a/sh/unarchive b/sh/unarchive
index 2b24ab4..288a964 100755
--- a/sh/unarchive
+++ b/sh/unarchive
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# NO_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH NO_BASH NO_DASH NO_ASH
 
 unarchive() { ### @- extract the contents of an archive file in one of many formats.
     ### borrowed from [prezto.](https://github.com/sorin-ionescu/prezto)
diff --git a/sh/unwrap b/sh/unwrap
index 9bfcb8b..23422a2 100644
--- a/sh/unwrap
+++ b/sh/unwrap
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 unwrap() { ### @- join paragraphs into one line each.
     awk '\''BEGIN{RS="\n\n";FS="\n"}{for(i=1;i<=NF;i++)printf "%s ",$i;print "\n"}'\'
diff --git a/sh/v_domap b/sh/v_domap
index 8f42081..d52fe42 100644
--- a/sh/v_domap
+++ b/sh/v_domap
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 v_domap() {
     argc $# -eq 1 "$0" || return
diff --git a/sh/v_lower b/sh/v_lower
index 850200a..f5ddbf9 100644
--- a/sh/v_lower
+++ b/sh/v_lower
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 v_lower() { ### @- transform the contents of a variable to lowercase.
     argc $# -eq 1 "$0" || return
diff --git a/sh/v_upper b/sh/v_upper
index 07d5b0a..0a889ab 100644
--- a/sh/v_upper
+++ b/sh/v_upper
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 v_upper() { ### @- transform the contents of a variable to uppercase.
     argc $# -eq 1 "$0" || return
diff --git a/sh/wat b/sh/wat
index 8ace619..d386805 100755
--- a/sh/wat
+++ b/sh/wat
@@ -1,8 +1,5 @@
 #!/usr/bin/env zsh
-# YES_ZSH
-# NO_BASH
-# NO_DASH
-# NO_ASH
+# YES_ZSH NO_BASH NO_DASH NO_ASH
 
 # wat - a better and recursive which/whence
 # via: https://leahneukirchen.org/dotfiles/tools.html
diff --git a/sh/wipe b/sh/wipe
index a36ee5b..c414cd5 100755
--- a/sh/wipe
+++ b/sh/wipe
@@ -1,9 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
-# YES_BB_AWK
+# YES_ZSH YES_BASH YES_DASH YES_ASH YES_BB_AWK
 
 wipe() { ### @-
     ### clear the screen and its scrollback, then print a high-contrast horizontal line.
diff --git a/sh/witch b/sh/witch
index 2608afe..f7b7d5a 100755
--- a/sh/witch
+++ b/sh/witch
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# NO_ZSH
-# NO_BASH
-# YES_DASH
-# YES_ASH
+# NO_ZSH NO_BASH YES_DASH YES_ASH
 # this is `which` from Debian. the only changes are superficial (formatting).
 # this does not work as-is with zsh.
 
diff --git a/sh/xxp b/sh/xxp
index 9f0fbc5..06e082a 100755
--- a/sh/xxp
+++ b/sh/xxp
@@ -1,8 +1,5 @@
 #!/usr/bin/env sh
-# YES_ZSH
-# YES_BASH
-# YES_DASH
-# YES_ASH
+# YES_ZSH YES_BASH YES_DASH YES_ASH
 
 xxp() { ### @-
     ### act like `xxd -p`, but nicely formatted.