diff --git a/abmux.sh b/abmux.sh
index 750e0fd..607b86b 100755
--- a/abmux.sh
+++ b/abmux.sh
@@ -15,7 +15,7 @@ while true; do
   slist="$(nl -nln -w1 -s' - ' "$SPFILE")"
   sname="$(printf '%s\nNew\nQuit\n' "$slist" | grep . | fzf --tac --footer="$FTR")"
   [ "$sname" = 'Quit' ] && break
-  [ "$sname" = 'New' ] && read -r -p 'New session name: ' sname
+  [ "$sname" = 'New' ] && printf 'New session name: ' && read -r sname
   sname="$(echo "$sname" | sed -E 's/^[0-9]+\ -\ //')"
   if [ -n "$sname" ]; then
     expect -c "spawn abduco -A \"$sname\" $SHELL; send \"\014\"; interact"
diff --git a/cities.sh b/cities.sh
index efd8be1..858d3b1 100755
--- a/cities.sh
+++ b/cities.sh
@@ -86,9 +86,9 @@ cmd_upload() {
 
 # delete individual remote files
 cmd_delete() {
-  echo -n 'Confirm file deletion (y to confirm)? ';
+  printf 'Confirm file deletion (y to confirm)? ';
   read -r resp
-  if [ "$resp" == "y" ]; then
+  if [ "$resp" = "y" ]; then
     $REQCMD -H "$AUTH_HDR" -d "filenames[]=$1" ${APIROOT}/delete
   else
     echo 'Operation cancelled'
@@ -103,7 +103,7 @@ cmd_sync() {
   projdir="$1"
   [ -z "$1" ] && projdir="$(pwd)"
   # iterate over the project directory
-  find "$projdir" \( ! -path '*/.*' \) -type f -printf '%P\n' | while read -r f; do
+  (cd "$projdir" && find . \( ! -path '*/.*' \) -type f | sed 's|^\./||') | while read -r f; do
     fullpath=$(realpath "${projdir}/$f")
     cursha="$(sha1sum -b "$fullpath" | cut -f 1 -d ' ')"
     prevsha="$(printf '%s' "$flist" | jq -r --arg p "$f" '.[$p]')"
diff --git a/dmux.sh b/dmux.sh
index aff3327..01142ab 100755
--- a/dmux.sh
+++ b/dmux.sh
@@ -17,7 +17,7 @@ while true; do
   slist="$(nl -nln -w1 -s' - ' "$SPFILE")"
   sname="$(printf '%s\nNew\nQuit\n' "$slist" | grep . | fzf --tac --footer="$FTR")"
   [ "$sname" = 'Quit' ] && printf '\033[0m' && break
-  [ "$sname" = 'New' ] && read -r -p 'New session name: ' sname
+  [ "$sname" = 'New' ] && printf 'New session name: ' && read -r sname
   sname="$(echo "$sname" | sed -E 's/^[0-9]+\ -\ //')"
   [ -n "$sname" ] && printf '\033[0m' && dtach -A "$SDIR/$sname" $SHELL
 done
diff --git a/flow.sh b/flow.sh
index 548abc9..bca3b7b 100755
--- a/flow.sh
+++ b/flow.sh
@@ -22,7 +22,7 @@
 # do_task() { # accepts workflow name into $1 and all input into $2
 #   # your actions here
 # }
-# run-task
+# run_task
 #
 # You can call different workflows from inside tasks by referring to
 # this very script using the $SFLIB environment variable or by calling
@@ -39,7 +39,7 @@ debugout() { printf '%s\n' "$*" >&2; }
 flowout() { printf '%s\t%s' "$1" "$2"; }
 
 # use this in all task definitions
-run-task() {
+run_task() {
   input="$(cat)"
   wf="$(printf '%s' "$input" | cut -f 1)"
   body="$(printf '%s' "$input" | cut -f 2-)"
@@ -57,4 +57,4 @@ sfrun() {
   flowout $wfbase "$(cat)" | SFLIB="$SFLIB" WFDIR="$WFDIR" $SHELL $wfbase | cut -f 2-
 }
 
-[ "$(basename "$0")" == "flow.sh" ] && sfrun $*
+[ "$(basename "$0")" = "flow.sh" ] && sfrun "$@"
diff --git a/ghmd.sh b/ghmd.sh
index d2ef700..44b14e0 100755
--- a/ghmd.sh
+++ b/ghmd.sh
@@ -62,7 +62,7 @@ case "$PARAM" in
     help
     ;;
   "newsrv") # set up Git user on the server
-    [[ -z "$USERHOST" ]] && echo "Error: no user and hostname!" && exit 1
+    [ -z "$USERHOST" ] && echo "Error: no user and hostname!" && exit 1
     $SSHCMD "useradd ${GITUSR}; passwd ${GITUSR}; mkdir -p /home/${GITUSR}/.ssh; echo 'no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty' > /home/${GITUSR}/.ssh/authorized_keys; chown -R ${GITUSR} /home/${GITUSR}/.ssh"
     echo "Now, you'll need to enter the newly created ${GITUSR} user password:"
     ssh-copy-id ${GITUSR}@${THOST}
@@ -70,18 +70,18 @@ case "$PARAM" in
     echo "Git user set up on ${THOST}. Now use $0 newrepo ${GITUSR}@${THOST} [name] to set up new Git repos"
     ;;
   "newrepo") # set up a new Git repo
-    [[ -z "$USERHOST" ]] && echo "Error: no user and hostname!" && exit 1
+    [ -z "$USERHOST" ] && echo "Error: no user and hostname!" && exit 1
     REPONAME="$3"
-    [[ -z "$REPONAME" ]] && echo "Error: no repository name!" && exit 1
+    [ -z "$REPONAME" ] && echo "Error: no repository name!" && exit 1
     REPODIR="${REPONAME}.git"
     FULLREPODIR="/home/${GITUSR}/$REPODIR"
     $SSHCMD "mkdir -p $FULLREPODIR;cd $FULLREPODIR;git init --bare --shared;chown -R ${GITUSR}:${GITUSR} ." 
     echo "Empty repository created at ${USERHOST}:${REPODIR}"
     ;;
   "set-repo-desc") # set the repo description for some services
-    [[ -z "$USERHOST" ]] && echo "Error: no user and hostname!" && exit 1
+    [ -z "$USERHOST" ] && echo "Error: no user and hostname!" && exit 1
     REPONAME="$3"
-    [[ -z "$REPONAME" ]] && echo "Error: no repository name!" && exit 1
+    [ -z "$REPONAME" ] && echo "Error: no repository name!" && exit 1
     VALUE="$4" # it may be empty
     REPODIR="${REPONAME}.git"
     FULLREPODIR="/home/${GITUSR}/$REPODIR"
@@ -89,9 +89,9 @@ case "$PARAM" in
     echo "Description set for ${REPODIR}"
     ;;
   "set-repo-url") # set the repo clone URL for some services
-    [[ -z "$USERHOST" ]] && echo "Error: no user and hostname!" && exit 1
+    [ -z "$USERHOST" ] && echo "Error: no user and hostname!" && exit 1
     REPONAME="$3"
-    [[ -z "$REPONAME" ]] && echo "Error: no repository name!" && exit 1
+    [ -z "$REPONAME" ] && echo "Error: no repository name!" && exit 1
     VALUE="$4" # it may be empty
     REPODIR="${REPONAME}.git"
     FULLREPODIR="/home/${GITUSR}/$REPODIR"
@@ -99,9 +99,9 @@ case "$PARAM" in
     echo "Clone URL set for ${REPODIR}"
     ;;
   "set-repo-owner") # set the repo owner name for some services
-    [[ -z "$USERHOST" ]] && echo "Error: no user and hostname!" && exit 1
+    [ -z "$USERHOST" ] && echo "Error: no user and hostname!" && exit 1
     REPONAME="$3"
-    [[ -z "$REPONAME" ]] && echo "Error: no repository name!" && exit 1
+    [ -z "$REPONAME" ] && echo "Error: no repository name!" && exit 1
     VALUE="$4" # it may be empty
     REPODIR="${REPONAME}.git"
     FULLREPODIR="/home/${GITUSR}/$REPODIR"
@@ -109,7 +109,7 @@ case "$PARAM" in
     echo "Owner name set for ${REPODIR}"
     ;;
   "gitd-sd") # set up the Git daemon using a systemd unit
-    [[ -z "$USERHOST" ]] && echo "Error: no user and hostname!" && exit 1
+    [ -z "$USERHOST" ] && echo "Error: no user and hostname!" && exit 1
     TMPUNIT="/tmp/git-daemon.service"
 cat << EOF > $TMPUNIT
 [Unit]
@@ -134,18 +134,18 @@ EOF
     rm -f $TMPUNIT
     ;;
   "gitd-publish") # make a repository public via the Git daemon
-    [[ -z "$USERHOST" ]] && echo "Error: no user and hostname!" && exit 1
+    [ -z "$USERHOST" ] && echo "Error: no user and hostname!" && exit 1
     REPONAME="$3"
-    [[ -z "$REPONAME" ]] && echo "Error: no repository name!" && exit 1
+    [ -z "$REPONAME" ] && echo "Error: no repository name!" && exit 1
     REPODIR="${REPONAME}.git"
     ACCFILE="/home/${GITUSR}/${REPODIR}/git-daemon-export-ok"
     $SSHCMD "touch $ACCFILE; chown $GITUSR $ACCFILE"
     echo "Repository git://${THOST}/$REPODIR made public"
     ;;
   "gitd-unpublish") # revoke repository publishing via the Git daemon
-    [[ -z "$USERHOST" ]] && echo "Error: no user and hostname!" && exit 1
+    [ -z "$USERHOST" ] && echo "Error: no user and hostname!" && exit 1
     REPONAME="$3"
-    [[ -z "$REPONAME" ]] && echo "Error: no repository name!" && exit 1
+    [ -z "$REPONAME" ] && echo "Error: no repository name!" && exit 1
     REPODIR="${REPONAME}.git"
     ACCFILE="/home/${GITUSR}/${REPODIR}/git-daemon-export-ok"
     $SSHCMD "rm -f $ACCFILE"
diff --git a/lshar.sh b/lshar.sh
index 2b178aa..7207962 100644
--- a/lshar.sh
+++ b/lshar.sh
@@ -16,7 +16,7 @@ f2p() {
   printf '%b' "$cprefix" # always start with the prefix
   IFS='' # separator
   while read -r -s -d '' -n1 b; do # convert every byte
-    if [ "$c" == "$l" ]; then # roll over and output suffix+prefix
+    if [ "$c" = "$l" ]; then # roll over and output suffix+prefix
       c=0 # reinit counter
       printf '%b' "$csuffix" # end the chunk
       printf '%b' "$cprefix" # begin a new chunk
@@ -36,13 +36,13 @@ f2p() {
 }
 
 # main code
-LF=$'\n' # cache the linefeed character
+LF="$(printf '\n')" # cache the linefeed character
 flist='' # pre-build the file list from args
 dlist='' # pre-build the directory list from args
 for i; do # iterate over args
   bname="${i##*/}" # get the basename
   if [ -d "$i" ]; then # it's a directory, we skip . and ..
-    [ "$bname" == '.' ] || [ "$bname" == '..' ] && continue 
+    [ "$bname" = '.' ] || [ "$bname" = '..' ] && continue 
     dlist="${dlist}${i%/}${LF}"          # append the directory
   else # it's a file
     dname="${i%%$bname}"               # get the basedir
diff --git a/pngizer.sh b/pngizer.sh
index 2cd980c..dd3d436 100755
--- a/pngizer.sh
+++ b/pngizer.sh
@@ -19,7 +19,7 @@ pngize_raw() {
   # 2. body (raw file data)
   cat "$1" >> $temp_ppm
   # 3. trailing zero bytes
-  for i in $(seq 1 $remlen); do printf '\x00' >> $temp_ppm; done
+  for i in $(seq 1 $remlen); do printf '\000' >> $temp_ppm; done
   # convert PPM to PNG and remove the temporary PPM
   magick ppm:$temp_ppm png:$ofile
   rm -f $temp_ppm
diff --git a/rusty-checker.sh b/rusty-checker.sh
index 9a33870..dfe4ccf 100755
--- a/rusty-checker.sh
+++ b/rusty-checker.sh
@@ -27,7 +27,7 @@ if [ "$PROV" = "gh" ]; then
   LANG_URL=""
 elif [ "$PROV" = "gl" ]; then
   TGT="${temp#*gitlab.com/}"
-  ROOT_URL="https://gitlab.com/api/v4/projects/${TGT/\//%2F}"
+  ROOT_URL="https://gitlab.com/api/v4/projects/$(echo "$TGT" | sed 's/\//%2F/g')"
   LANG_URL="${ROOT_URL}/languages"
 elif [ "$PROV" = "cb" ]; then
   TGT="${temp#*codeberg.org/}"
@@ -55,15 +55,15 @@ echo "$langdata" | grep -qi "$CHLANG" && CORR_SCORE=$((CORR_SCORE + 10))
 # but if it is the main one, we further increase the score by 50
 echo "$mainlang" | grep -qi "$CHLANG" && CORR_SCORE=$((CORR_SCORE + 50)) 
 
-if ((CORR_SCORE >= 50)); then
+if [ "$CORR_SCORE" -ge 50 ]; then
   echo "The project $TGT is most likely written in $CHLANG."
-  if ((CORR_SCORE >= 100)); then
+  if [ "$CORR_SCORE" -ge 100 ]; then
     echo 'The author is a definite fanatic of this language.'
   fi
   exit 0
 else
   echo "The project $TGT does not seem to be written in $CHLANG."
-  if ((CORR_SCORE > 0)); then
+  if [ "$CORR_SCORE" -gt 0 ]; then
     echo 'However, this language may be partially used there.'
   fi
   exit 1;
diff --git a/shee.sh b/shee.sh
index 665cc8d..8177b04 100755
--- a/shee.sh
+++ b/shee.sh
@@ -20,7 +20,7 @@ addhistory() {
   mv ${histfile}.new $histfile
 }
 
-prompt() { printf "\e[1;32m>> \e[0m"; }
+prompt() { printf "\033[1;32m>> \033[0m"; }
 clearhist() {
   printf '[]' > $histfile
   addhistory system "$SHEESH_SYSPROMPT"
@@ -30,12 +30,12 @@ setsys() {
   SHEESH_SYSPROMPT="$*"
   clearhist
 }
-setsysfile() { setsys "$(<"$1")"; }
+setsysfile() { setsys "$(cat "$1")"; }
 addfile() {
   tmp="$(mktemp -t furrfufile.XXXXXXX)"
   fname="$(basename $1)"
   if startswith "$1" "http*://"; then
-    [ -z "$fname" || "$fname" == "/" ] && $fname="${1//\//_}"
+    [ -z "$fname" ] || [ "$fname" = "/" ] && fname="$(echo "$1" | tr '/' '_')"
     curl -sSLN $1 > $tmp
   else
     cp "$1" $tmp
@@ -62,15 +62,15 @@ listmodels() {
     ${OPENAI_API_KEY:+-H "Authorization: Bearer $OPENAI_API_KEY"} \
     ${SHEESH_COOKIES:+-H "Cookie: $SHEESH_COOKIES"} \
   | jq -r '.data[].id' | while read -r modelname; do
-    printf '\e[0;36m* %s\e[0m\n' "$modelname"
+    printf '\033[0;36m* %s\033[0m\n' "$modelname"
   done
 }
 
 help() {
-  printf 'Current settings:\n\n\e[2;37mEndpoint: %s\n' "$SHEESH_API_ROOT"
+  printf 'Current settings:\n\n\033[2;37mEndpoint: %s\n' "$SHEESH_API_ROOT"
   printf 'Model: %s\n' "$SHEESH_MODEL"
   printf 'Temperature: %.2f\n' "$SHEESH_TEMP"
-  printf 'System prompt: "%s"\e[0m\n\n' "$SHEESH_SYSPROMPT"
+  printf 'System prompt: "%s"\033[0m\n\n' "$SHEESH_SYSPROMPT"
   echo 'Available commands:'
   echo
   echo '* /models: list available models'
@@ -97,7 +97,7 @@ help() {
   echo
 }
 
-trap cleanup SIGINT SIGABRT SIGHUP SIGQUIT
+trap cleanup INT ABRT HUP QUIT
 cleanup() {
   rm $histfile $datafile
   printf '\nBye!\n'
@@ -106,19 +106,19 @@ cleanup() {
 
 hdrline='----------------------'
 title='SHEE.SH v2 by Luxferre'
-printf '\e[1;36m%s\n%s\n%s\e[0m\n' "$hdrline" "$title" "$hdrline"
-printf '\e[2;37mEndpoint: %s\n' "$SHEESH_API_ROOT"
+printf '\033[1;36m%s\n%s\n%s\033[0m\n' "$hdrline" "$title" "$hdrline"
+printf '\033[2;37mEndpoint: %s\n' "$SHEESH_API_ROOT"
 printf 'Model: %s\n' "$SHEESH_MODEL"
 printf 'Temperature: %.2f\n' "$SHEESH_TEMP"
-printf '\e[1;36m%s\e[0m\n' "$hdrline"
+printf '\033[1;36m%s\033[0m\n' "$hdrline"
 
 setsys "$SHEESH_SYSPROMPT"
 while prompt && read -r line; do
   [ -z "$line" ] && continue
-  [ "$line" == "/bye" ] && break
-  [ "$line" == "/clear" ] && clearhist && echo "Session cleared" && continue
-  [ "$line" == "/help" ] && help && continue
-  [ "$line" == "/models" ] && listmodels && continue
+  [ "$line" = "/bye" ] && break
+  [ "$line" = "/clear" ] && clearhist && echo "Session cleared" && continue
+  [ "$line" = "/help" ] && help && continue
+  [ "$line" = "/models" ] && listmodels && continue
   startswith "$line" '/sys ' && setsys "${line#\/sys }" && echo "System prompt set and session cleared" && continue
   startswith "$line" '/sysload ' && setsysfile "${line#\/sysload }" && echo "System prompt loaded and session cleared" && continue
   startswith "$line" '/temp ' && SHEESH_TEMP="${line#\/temp }" && echo "Temperature set to $SHEESH_TEMP" && continue
@@ -147,11 +147,11 @@ while prompt && read -r line; do
   while IFS= read -r chunk; do
       [ -z "$chunk" ] && continue
       data="${chunk#data: }"
-      [ "$data" == "[DONE]" ] && break
+      [ "$data" = "[DONE]" ] && break
       delta=''
       startswith "$data" '{' && delta="$(printf '%s' "$data" | jq -rj '.choices[0].delta.content // empty' 2>/dev/null;printf x)"
       delta="${delta%?}"
-      [ -n "$delta" ] && printf "\e[0;33m%s\e[0m" "$delta"
+      [ -n "$delta" ] && printf "\033[0;33m%s\033[0m" "$delta"
       tailbuf="$tailbuf$delta"
   done
   echo