diff --git a/scripts/zsh/_task b/scripts/zsh/_task
index d3d514a7c..970ab7bf4 100644
--- a/scripts/zsh/_task
+++ b/scripts/zsh/_task
@@ -1,13 +1,8 @@
 #compdef task
 #
-# This script is currently unmaintained and was released for an earlier version
-# of taskwarrior.  We welcome any zsh user that wants to contribute to
-# taskwarrior to take a look at this script and either confirm its working
-# status or improve it.  Please contact us at support@taskwarrior.org if you
-# have further questions on how to contribute to taskwarrior.
-#
 # zsh completion for taskwarrior
 #
+# Copyright 2010 Johannes Schlatow
 # Copyright 2009 P.C. Shyamshankar
 # All rights reserved.
 #
@@ -32,9 +27,38 @@
 #     02110-1301
 #     USA
 #
-
-typeset -g _task_cmds
+typeset -g _task_cmds _task_projects _task_tags _task_config _task_modifiers
+_task_projects=($(task _projects))
+_task_tags=($(task _tags))
+_task_ids=($(task _ids))
+_task_config=($(task _config))
+_task_modifiers=(
+	'before' \
+	'after' \
+	'none' \
+	'any' \
+	'is' \
+	'isnt' \
+	'has' \
+	'hasnt' \
+	'startswith' \
+	'endswith' \
+	'word' \
+	'noword'
+)
 _task_cmds=($(task _commands))
+_task_idCmds=(
+	'append' \
+	'prepend' \
+	'annotate' \
+	'denotate' \
+	'edit' \
+	'duplicate' \
+	'info' \
+	'start' \
+	'stop' \
+	'done'
+)
 
 _task() {
     _arguments -s -S \
@@ -42,18 +66,177 @@ _task() {
     return 0
 }
 
+local -a reply args word
+word=$'[^\0]#\0'
 
+# priorities
+local -a task_priorities
+_regex_words task_prios 'task priorities' \
+	'H:High' \
+	'M:Middle' \
+	'L:Low'
+task_priorities=("$reply[@]")
+
+# projects
+local -a task_projects
+task_projects=(
+	/"$word"/
+	":task_projects:task projects:compadd -a _task_projects"
+)
+
+local -a _task_dates
+_regex_words _task_dates 'task dates' \
+	'tod*ay:Today' \
+	'yes*terday:Yesterday' \
+	'tom*orrow:Tomorrow' \
+	'sow:Start of week' \
+	'soww:Start of work week' \
+	'socw:Start of calendar week' \
+	'som:Start of month' \
+	'soy:Start of year' \
+	'eow:End of week' \
+	'eoww:End of work week' \
+	'eocw:End of calendar week' \
+	'eom:End of month' \
+	'eoy:End of year' \
+	'mon:Monday' \
+	'tue:Tuesday'\
+	'wed:Wednesday' \
+	'thu:Thursday' \
+	'fri:Friday' \
+	'sat:Saturday' \
+	'sun:Sunday'
+_task_dates=("$reply[@]")
+
+local -a _task_reldates
+_regex_words _task_reldates 'task reldates' \
+	'hrs:n hours' \
+	'day:n days' \
+	'1st:first' \
+	'2nd:second' \
+	'3rd:third' \
+	'th:4th, 5th, etc.' \
+	'wks:weeks'
+_task_reldates=("$reply[@]")
+
+task_dates=(
+	\( "$_task_dates[@]" \|
+    \( /$'[0-9][0-9]#'/- \( "$_task_reldates[@]" \) \)
+	\)
+)
+
+_regex_words _task_freqs 'task frequencies' \
+	'daily:Every day' \
+	'day:Every day' \
+	'weekdays:Every day skipping weekend days' \
+	'weekly:Every week' \
+	'biweekly:Every two weeks' \
+	'fortnight:Every two weeks' \
+	'quarterly:Every three months' \
+	'semiannual:Every six months' \
+	'annual:Every year' \
+	'yearly:Every year' \
+	'biannual:Every two years' \
+	'biyearly:Every two years'
+_task_freqs=("$reply[@]")
+
+local -a _task_frequencies
+_regex_words _task_frequencies 'task frequencies' \
+	'd:days' \
+	'w:weeks' \
+	'q:quarters' \
+	'y:years'
+_task_frequencies=("$reply[@]")
+
+task_freqs=(
+	\( "$_task_freqs[@]" \|
+     \( /$'[0-9][0-9]#'/- \( "$_task_frequencies[@]" \) \)
+	\)
+)
+
+# attributes
+local -a task_attributes
+_regex_words -t ':' task_attr 'task attributes' \
+	'pro*ject:Project name:$task_projects' \
+	'du*e:Due date:$task_dates' \
+	'wa*it:Date until task becomes pending:$task_dates' \
+	're*cur:Recurrence frequency:$task_freqs' \
+	'pri*ority:priority:$task_priorities' \
+	'un*til:Recurrence end date:$task_dates' \
+	'fg:Foreground color' \
+	'bg:Background color' \
+	'li*mit:Desired number of rows in report'
+task_attributes=("$reply[@]")
+
+args=(
+	\( "$task_attributes[@]" \|
+	\( /'(project|due|wait|recur|priority|until|fg|bg|limit).'/- \( /$'[^:]#:'/ ":task_mods:modifiers:compadd -S ':' -a _task_modifiers" \) \) \|
+	\( /'(rc).'/- \( /$'[^:]#:'/ ":task_config:config:compadd -S ':' -a _task_config" \) \) \|
+	\( /'(+|-)'/- \( /"$word"/ ":task_rtag:remove tag:compadd -a _task_tags" \) \) \|
+	\( /"$word"/ \)
+	\) \#
+)
+_regex_arguments _task_attributes "${args[@]}"
+
+## task commands
+
+# default completion
+(( $+functions[_task_default] )) ||
+_task_default() {
+	_task_attributes "$@"
+}
+
+# commands expecting an ID
+(( $+functions[_task_id] )) ||
+_task_id() {
+	if (( CURRENT < 3 )); then
+		_describe -t ids 'task IDs' _task_ids
+	else
+		_task_attributes "$@"
+	fi
+}
+
+# merge completion
+(( $+functions[_task_merge] )) ||
+_task_merge() {
+	_files
+}
+
+# modify (task [0-9]* ...) completion
+(( $+functions[_task_modify] )) ||
+_task_modify() {
+	_describe -t commands 'task command' _task_idCmds
+	_task_attributes "$@"
+}
+
+## first level completion => task sub-command completion
 (( $+functions[_task_commands] )) ||
 _task_commands() {
     local cmd ret=1
-    if (( CURRENT == 1 )); then
-        _describe -t commands 'task command' _task_cmds
-    else
+	if (( CURRENT == 1 )); then
+		# TODO add descriptions (assoz array)
+		_describe -t commands 'task command' _task_cmds
+		# TODO match more than one ID
+		_describe -t ids 'task IDs' _task_ids
+		# TODO sorting
+	elif [[ $words[1] =~ ^[0-9]*$ ]] then
+		 _call_function ret _task_modify
+		 return ret
+	else
         local curcontext="${curcontext}"
-        cmd="${_task_cmds[(r)$words[1]:*]%%:*}"
+#        cmd="${_task_cmds[(r)$words[1]:*]%%:*}"
+		  cmd="${_task_cmds[(r)$words[1]]}"
+		  idCmd="${(M)_task_idCmds[@]:#$words[1]}"
         if (( $#cmd )); then
             curcontext="${curcontext%:*:*}:task-${cmd}"
-            _call_function ret _task_${cmd} || _message "No command remaining."
+
+				if (( $#idCmd )); then
+					_call_function ret _task_id
+				else
+					_call_function ret _task_${cmd} ||
+						_call_function ret _task_default ||
+							_message "No command remaining."
+				fi
         else
             _message "Unknown subcommand ${cmd}"
         fi