diff --git a/config/fish/functions/z.fish b/config/fish/functions/z.fish
new file mode 100644
index 0000000..eaa8765
--- /dev/null
+++ b/config/fish/functions/z.fish
@@ -0,0 +1,189 @@
+# maintains a jump-list of the directories you actually use
+#
+# INSTALL:
+#   * put something like this in your config.fish:
+#     . /path/to/z.fish
+#   * put something like this in your fish_prompt function:
+#       z --add "$PWD"
+#   * cd around for a while to build up the db
+#   * PROFIT!!
+#
+# USE:
+#   * z foo     # goes to most frecent dir matching foo
+#   * z foo bar # goes to most frecent dir matching foo and bar
+#   * z -r foo  # goes to highest ranked dir matching foo
+#   * z -t foo  # goes to most recently accessed dir matching foo
+#   * z -l foo  # list all dirs matching foo (by frecency)
+
+function addzhist --on-variable PWD
+    z --add "$PWD"
+end
+
+function z -d "Jump to a recent directory."
+    set -l datafile "$HOME/.z"
+
+    # add entries
+    if [ "$argv[1]" = "--add" ]
+        set -e argv[1]
+
+        # $HOME isn't worth matching
+        [ "$argv" = "$HOME" ]; and return
+
+        set -l tempfile (command mktemp $datafile.XXXXXX)
+        test -f $tempfile; or return
+
+        # maintain the file
+        command awk -v path="$argv" -v now=(date +%s) -F"|" '
+            BEGIN {
+                rank[path] = 1
+                time[path] = now
+            }
+            $2 >= 1 {
+                if( $1 == path ) {
+                    rank[$1] = $2 + 1
+                    time[$1] = now
+                } else {
+                    rank[$1] = $2
+                    time[$1] = $3
+                }
+                count += $2
+            }
+            END {
+                if( count > 1000 ) {
+                    for( i in rank ) print i "|" 0.9*rank[i] "|" time[i] # aging
+                } else for( i in rank ) print i "|" rank[i] "|" time[i]
+            }
+        ' $datafile ^/dev/null > $tempfile
+
+        command mv -f $tempfile $datafile
+
+    # tab completion
+    else
+        if [ "$argv[1]" = "--complete" ]
+            command awk -v q="$argv[2]" -F"|" '
+                BEGIN {
+                    if( q == tolower(q) ) nocase = 1
+                    split(q,fnd," ")
+                }
+                {
+                    if( system("test -d \"" $1 "\"") ) next
+                    if( nocase ) {
+                        for( i in fnd ) tolower($1) !~ tolower(fnd[i]) && $1 = ""
+                        if( $1 ) print $1
+                    } else {
+                        for( i in fnd ) $1 !~ fnd[i] && $1 = ""
+                        if( $1 ) print $1
+                    }
+                }
+            ' "$datafile" 2>/dev/null
+
+        else
+            # list/go
+            set -l last ''
+            set -l list 0
+            set -l typ ''
+            set -l fnd ''
+
+            while [ (count $argv) -gt 0 ]
+                switch "$argv[1]"
+                    case -- '-h'
+                        echo "z [-h][-l][-r][-t] args" >&2
+                        return
+                    case -- '-l'
+                        set list 1
+                    case -- '-r'
+                        set typ "rank"
+                    case -- '-t'
+                        set typ "recent"
+                    case -- '--'
+                        while [ "$argv[1]" ]
+                            set -e argv[1]
+                            set fnd "$fnd $argv[1]"
+                        end
+                    case '*'
+                        set fnd "$fnd $argv[1]"
+                end
+                set last $1
+                set -e argv[1]
+            end
+
+            [ "$fnd" ]; or set list 1
+
+            # if we hit enter on a completion just go there
+            [ -d "$last" ]; and cd "$last"; and return
+
+            # no file yet
+            [ -f "$datafile" ]; or return
+
+            set -l tempfile (command mktemp $datafile.XXXXXX)
+            test -f $tempfile; or return
+            set -l target (command awk -v t=(date +%s) -v list="$list" -v typ="$typ" -v q="$fnd" -v tmpfl="$tempfile" -F"|" '
+                function frecent(rank, time) {
+                    dx = t-time
+                    if( dx < 3600 ) return rank*4
+                    if( dx < 86400 ) return rank*2
+                    if( dx < 604800 ) return rank/2
+                    return rank/4
+                }
+                function output(files, toopen, override) {
+                    if( list ) {
+                        if( typ == "recent" ) {
+                            cmd = "sort -nr >&2"
+                        } else cmd = "sort -n >&2"
+                        for( i in files ) if( files[i] ) printf "%-10s %s\n", files[i], i | cmd
+                        if( override ) printf "%-10s %s\n", "common:", override > "/dev/stderr"
+                    } else {
+                        if( override ) toopen = override
+                        print toopen
+                    }
+                }
+                function common(matches, fnd, nc) {
+                    for( i in matches ) {
+                        if( matches[i] && (!short || length(i) < length(short)) ) short = i
+                    }
+                    if( short == "/" ) return
+                    for( i in matches ) if( matches[i] && i !~ short ) x = 1
+                    if( x ) return
+                    if( nc ) {
+                        for( i in fnd ) if( tolower(short) !~ tolower(fnd[i]) ) x = 1
+                    } else for( i in fnd ) if( short !~ fnd[i] ) x = 1
+                    if( !x ) return short
+                }
+                BEGIN { split(q, a, " ") }
+                {
+                    if( system("test -d \"" $1 "\"") ) next
+                    print $0 >> tmpfl
+                    if( typ == "rank" ) {
+                        f = $2
+                    } else if( typ == "recent" ) {
+                        f = t-$3
+                    } else f = frecent($2, $3)
+                    wcase[$1] = nocase[$1] = f
+                    for( i in a ) {
+                        if( $1 !~ a[i] ) delete wcase[$1]
+                        if( tolower($1) !~ tolower(a[i]) ) delete nocase[$1]
+                    }
+                    if( wcase[$1] > oldf ) {
+                        cx = $1
+                        oldf = wcase[$1]
+                    } else if( nocase[$1] > noldf ) {
+                        ncx = $1
+                        noldf = nocase[$1]
+                    }
+                }
+                END {
+                    if( cx ) {
+                        output(wcase, cx, common(wcase, a, 0))
+                    } else if( ncx ) output(nocase, ncx, common(nocase, a, 1))
+                }
+            ' "$datafile")
+
+            if [ $status -gt 0 ]
+                command rm -f "$tempfile"
+            else
+                command mv -f "$tempfile" "$datafile"
+                [ "$target" ]; and cd "$target"
+            end
+        end
+    end
+end