chore: changelog for completion engine

CHANGELOG.md

@@ -10,11 +10,11 @@
   by @Legimity).
 - PowerShell completions now work with aliases of the `task` command, not just
   the `task` binary itself (#2852 by @kojiishi).
-- Fixed task and namespace aliases not being completed by the Zsh completion. A
+- Fixed task and namespace aliases not being completed by the Zsh completion.
-  `show-aliases` zstyle can turn this off (#2865, #2864 by @vmaerten).
+  A `show-aliases` zstyle can turn this off (#2865, #2864 by @vmaerten).
 - Fixed task names containing certain characters (e.g. `\`, `_`, `^`) leaking
-  into checksum/timestamp filenames, breaking `sources:`/`generates:` up-to-date
+  into checksum/timestamp filenames, breaking `sources:`/`generates:`
-  detection (#2886 by @s3onghyun).
+  up-to-date detection (#2886 by @s3onghyun).
 - Fixed `for: matrix:` loops using `ref:` rows producing wrong values when the
   same task was run concurrently (e.g. by parallel `deps`) with different vars
   (#2890, #2894 by @amitmishra11).
@@ -23,15 +23,16 @@
 - Added the `use_gitignore` setting (global or per-task) to skip files matched
   by your `.gitignore` when fingerprinting `sources`/`generates` and when
   watching (#2773 by @vmaerten).
-- Added support for configuring output flags (`--output`,
+- Added support for configuring output flags (`--output`, `--output-group-begin`,
-  `--output-group-begin`, `--output-group-end`, `--output-group-error-only`) via
+  `--output-group-end`, `--output-group-error-only`) via the `TASK_OUTPUT*`
-  the `TASK_OUTPUT*` environment variables (#2873 by @liiight).
+  environment variables (#2873 by @liiight).
 - Added a `--temp-dir` flag (with `TASK_TEMP_DIR` env var and `temp-dir` taskrc
   config) to customise the directory where Task stores temporary files such as
   checksums. Relative paths are resolved against the root Taskfile (#2891 by
   @kjasn).
-- Defined environment variable behavior for remote taskfiles (#2267, #2847 by
+- Unified Bash, Fish, Zsh and PowerShell completions behind a single `task
-  @vmaerten).
+  __complete` engine, so every shell offers the same suggestions: task names,
+  aliases, flags, flag values and per-task CLI variables (#2897 by @vmaerten).
 
 ## v3.51.1 - 2026-05-16
 

cmd/task/complete_cmd.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"io"
+	"os"
+
+	"github.com/spf13/pflag"
+
+	"github.com/go-task/task/v3"
+	"github.com/go-task/task/v3/internal/complete"
+)
+
+func runComplete(args []string) error {
+	dir, entrypoint, global := extractTaskfileFlags(args)
+
+	e := task.NewExecutor(
+		task.WithDir(dir),
+		task.WithEntrypoint(entrypoint),
+		task.WithStdout(io.Discard),
+		task.WithStderr(io.Discard),
+		task.WithVersionCheck(false),
+	)
+	if global {
+		if home, err := os.UserHomeDir(); err == nil {
+			e.Options(task.WithDir(home))
+		}
+	}
+
+	// Best-effort: a missing or broken Taskfile must not break completion.
+	_ = e.Setup()
+
+	suggs, dirv := complete.Complete(e, pflag.CommandLine, args)
+	complete.Write(os.Stdout, suggs, dirv)
+	return nil
+}
+
+func extractTaskfileFlags(args []string) (dir, entrypoint string, global bool) {
+	fs := pflag.NewFlagSet("complete", pflag.ContinueOnError)
+	fs.SetOutput(io.Discard)
+	fs.ParseErrorsAllowlist.UnknownFlags = true
+	fs.Usage = func() {}
+	fs.StringVarP(&dir, "dir", "d", "", "")
+	fs.StringVarP(&entrypoint, "taskfile", "t", "", "")
+	fs.BoolVarP(&global, "global", "g", false, "")
+	_ = fs.Parse(args)
+	return
+}

cmd/task/task.go

@@ -13,6 +13,7 @@ import (
 	"github.com/go-task/task/v3/args"
 	"github.com/go-task/task/v3/errors"
 	"github.com/go-task/task/v3/experiments"
+	"github.com/go-task/task/v3/internal/complete"
 	"github.com/go-task/task/v3/internal/filepathext"
 	"github.com/go-task/task/v3/internal/flags"
 	"github.com/go-task/task/v3/internal/logger"
@@ -58,6 +59,12 @@ func emitCIErrorAnnotation(err error) {
 }
 
 func run() error {
+	// Dispatched before flag validation: the args after __complete are the
+	// user's command line, not Task's own flags.
+	if complete.IsActive() {
+		return runComplete(os.Args[2:])
+	}
+
 	log := &logger.Logger{
 		Stdout:  os.Stdout,
 		Stderr:  os.Stderr,

compiler.go

@@ -15,7 +15,6 @@ import (
 	"github.com/go-task/task/v3/internal/logger"
 	"github.com/go-task/task/v3/internal/templater"
 	"github.com/go-task/task/v3/internal/version"
-	"github.com/go-task/task/v3/taskfile"
 	"github.com/go-task/task/v3/taskfile/ast"
 )
 
@@ -207,19 +206,10 @@ func (c *Compiler) getSpecialVars(t *ast.Task, call *Call) (map[string]string, e
 	// Use filepath.ToSlash for all paths to ensure consistent forward slashes
 	// across platforms. This prevents issues with backslashes being interpreted
 	// as escape sequences when paths are used in shell commands on Windows.
-	var rootTaskfile, rootDir string
-	if taskfile.IsRemoteEntrypoint(c.Entrypoint) {
-		rootTaskfile = c.Entrypoint
-		rootDir = ""
-	} else {
-		rootTaskfile = filepath.ToSlash(filepathext.SmartJoin(c.Dir, c.Entrypoint))
-		rootDir = filepath.ToSlash(c.Dir)
-	}
-
 	allVars := map[string]string{
 		"TASK_EXE":            filepath.ToSlash(os.Args[0]),
-		"ROOT_TASKFILE":       rootTaskfile,
+		"ROOT_TASKFILE":       filepath.ToSlash(filepathext.SmartJoin(c.Dir, c.Entrypoint)),
-		"ROOT_DIR":            rootDir,
+		"ROOT_DIR":            filepath.ToSlash(c.Dir),
 		"USER_WORKING_DIR":    filepath.ToSlash(c.UserWorkingDir),
 		"TASK_VERSION":        version.GetVersion(),
 		"PATH_LIST_SEPARATOR": string(os.PathListSeparator),
@@ -227,22 +217,9 @@ func (c *Compiler) getSpecialVars(t *ast.Task, call *Call) (map[string]string, e
 	}
 	if t != nil {
 		allVars["TASK"] = t.Task
-		if taskfile.IsRemoteEntrypoint(t.Location.Taskfile) {
-			allVars["TASKFILE"] = t.Location.Taskfile
-			allVars["TASKFILE_DIR"] = ""
-			switch {
-			case t.Dir == "":
-				allVars["TASK_DIR"] = filepath.ToSlash(c.UserWorkingDir)
-			case filepath.IsAbs(t.Dir):
-				allVars["TASK_DIR"] = filepath.ToSlash(t.Dir)
-			default:
-				allVars["TASK_DIR"] = filepath.ToSlash(filepathext.SmartJoin(c.UserWorkingDir, t.Dir))
-			}
-		} else {
 		allVars["TASK_DIR"] = filepath.ToSlash(filepathext.SmartJoin(c.Dir, t.Dir))
 		allVars["TASKFILE"] = filepath.ToSlash(t.Location.Taskfile)
 		allVars["TASKFILE_DIR"] = filepath.ToSlash(filepath.Dir(t.Location.Taskfile))
-		}
 	} else {
 		allVars["TASK"] = ""
 		allVars["TASK_DIR"] = ""

compiler_internal_test.go

@@ -1,135 +0,0 @@
-package task
-
-import (
-	"path/filepath"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-
-	"github.com/go-task/task/v3/internal/filepathext"
-	"github.com/go-task/task/v3/taskfile/ast"
-)
-
-func TestGetSpecialVarsRemote(t *testing.T) {
-	t.Parallel()
-
-	uwd := t.TempDir()
-	uwdSlash := filepath.ToSlash(uwd)
-	localProj := filepath.Join(uwd, "proj")
-	localProjSlash := filepath.ToSlash(localProj)
-	localTaskfile := filepath.Join(localProj, "Taskfile.yml")
-	localTaskfileSlash := filepath.ToSlash(localTaskfile)
-	absTaskDir := filepath.Join(uwd, "opt", "work")
-	absTaskDirSlash := filepath.ToSlash(absTaskDir)
-
-	tests := []struct {
-		name             string
-		entrypoint       string
-		compilerDir      string
-		taskDir          string
-		taskfileLocation string
-		wantRootTaskfile string
-		wantRootDir      string
-		wantTaskfile     string
-		wantTaskfileDir  string
-		wantTaskDir      string
-	}{
-		{
-			name:             "local entrypoint, local task",
-			entrypoint:       localTaskfile,
-			compilerDir:      localProj,
-			taskDir:          "",
-			taskfileLocation: localTaskfile,
-			wantRootTaskfile: localTaskfileSlash,
-			wantRootDir:      localProjSlash,
-			wantTaskfile:     localTaskfileSlash,
-			wantTaskfileDir:  localProjSlash,
-			wantTaskDir:      localProjSlash,
-		},
-		{
-			name:             "https entrypoint, empty task.dir",
-			entrypoint:       "https://taskfile.dev/Taskfile.yml",
-			compilerDir:      "",
-			taskDir:          "",
-			taskfileLocation: "https://taskfile.dev/Taskfile.yml",
-			wantRootTaskfile: "https://taskfile.dev/Taskfile.yml",
-			wantRootDir:      "",
-			wantTaskfile:     "https://taskfile.dev/Taskfile.yml",
-			wantTaskfileDir:  "",
-			wantTaskDir:      uwdSlash,
-		},
-		{
-			name:             "https entrypoint, relative task.dir",
-			entrypoint:       "https://taskfile.dev/Taskfile.yml",
-			compilerDir:      "",
-			taskDir:          "subdir",
-			taskfileLocation: "https://taskfile.dev/Taskfile.yml",
-			wantRootTaskfile: "https://taskfile.dev/Taskfile.yml",
-			wantRootDir:      "",
-			wantTaskfile:     "https://taskfile.dev/Taskfile.yml",
-			wantTaskfileDir:  "",
-			wantTaskDir:      filepath.ToSlash(filepathext.SmartJoin(uwd, "subdir")),
-		},
-		{
-			name:             "https entrypoint, absolute task.dir",
-			entrypoint:       "https://taskfile.dev/Taskfile.yml",
-			compilerDir:      "",
-			taskDir:          absTaskDir,
-			taskfileLocation: "https://taskfile.dev/Taskfile.yml",
-			wantRootTaskfile: "https://taskfile.dev/Taskfile.yml",
-			wantRootDir:      "",
-			wantTaskfile:     "https://taskfile.dev/Taskfile.yml",
-			wantTaskfileDir:  "",
-			wantTaskDir:      absTaskDirSlash,
-		},
-		{
-			name:             "git entrypoint",
-			entrypoint:       "https://github.com/foo/bar.git//Taskfile.yml?ref=main",
-			compilerDir:      "",
-			taskDir:          "",
-			taskfileLocation: "https://github.com/foo/bar.git//Taskfile.yml?ref=main",
-			wantRootTaskfile: "https://github.com/foo/bar.git//Taskfile.yml?ref=main",
-			wantRootDir:      "",
-			wantTaskfile:     "https://github.com/foo/bar.git//Taskfile.yml?ref=main",
-			wantTaskfileDir:  "",
-			wantTaskDir:      uwdSlash,
-		},
-		{
-			name:             "local root, remote included task",
-			entrypoint:       localTaskfile,
-			compilerDir:      localProj,
-			taskDir:          "",
-			taskfileLocation: "https://taskfile.dev/included.yml",
-			wantRootTaskfile: localTaskfileSlash,
-			wantRootDir:      localProjSlash,
-			wantTaskfile:     "https://taskfile.dev/included.yml",
-			wantTaskfileDir:  "",
-			wantTaskDir:      uwdSlash,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
-
-			c := &Compiler{
-				Dir:            tt.compilerDir,
-				Entrypoint:     tt.entrypoint,
-				UserWorkingDir: uwd,
-			}
-			task := &ast.Task{
-				Task:     "mytask",
-				Dir:      tt.taskDir,
-				Location: &ast.Location{Taskfile: tt.taskfileLocation},
-			}
-
-			vars, err := c.getSpecialVars(task, nil)
-			assert.NoError(t, err)
-			assert.Equal(t, tt.wantRootTaskfile, vars["ROOT_TASKFILE"], "ROOT_TASKFILE")
-			assert.Equal(t, tt.wantRootDir, vars["ROOT_DIR"], "ROOT_DIR")
-			assert.Equal(t, tt.wantTaskfile, vars["TASKFILE"], "TASKFILE")
-			assert.Equal(t, tt.wantTaskfileDir, vars["TASKFILE_DIR"], "TASKFILE_DIR")
-			assert.Equal(t, tt.wantTaskDir, vars["TASK_DIR"], "TASK_DIR")
-		})
-	}
-}

completion/bash/task.bash

@@ -1,60 +1,69 @@
 # vim: set tabstop=2 shiftwidth=2 expandtab:
+#
+# Thin wrapper around `task __complete`. All suggestion logic lives in the
+# Go engine — do not add completion logic here.
 
-_GO_TASK_COMPLETION_LIST_OPTION='--list-all'
 TASK_CMD="${TASK_EXE:-task}"
 
-function _task()
+_task() {
-{
   local cur prev words cword
   _init_completion -n : || return
 
-  # Check for `--` within command-line and quit or strip suffix.
+  local -a args=()
-  local i
+  if (( cword > 0 )); then
-  for i in "${!words[@]}"; do
+    args=( "${words[@]:1:cword}" )
-    if [ "${words[$i]}" == "--" ]; then
-      # Do not complete words following `--` passed to CLI_ARGS.
-      [ $cword -gt $i ] && return
-      # Remove the words following `--` to not put --list in CLI_ARGS.
-      words=( "${words[@]:0:$i}" )
-      break
   fi
+  if (( ${#args[@]} == 0 )); then
+    args=( "" )
+  fi
+
+  local output
+  output=$("$TASK_CMD" __complete "${args[@]}" 2>/dev/null)
+  if [[ -z "$output" ]]; then
+    _filedir
+    return
+  fi
+
+  local -a lines=()
+  local line
+  while IFS= read -r line; do
+    lines+=( "$line" )
+  done <<< "$output"
+
+  local last_idx=$(( ${#lines[@]} - 1 ))
+  local directive="${lines[$last_idx]#:}"
+  unset 'lines[$last_idx]'
+
+  if (( directive & 8 )); then
+    local exts=""
+    for line in "${lines[@]}"; do
+      exts+="${exts:+|}$line"
+    done
+    _filedir "@($exts)"
+    return
+  fi
+
+  if (( directive & 16 )); then
+    _filedir -d
+    return
+  fi
+
+  local -a values=()
+  for line in "${lines[@]}"; do
+    values+=( "${line%%$'\t'*}" )
   done
 
-  # Handle special arguments of options.
+  COMPREPLY=( $( compgen -W "${values[*]}" -- "$cur" ) )
-  case "$prev" in
-    -d|--dir|--remote-cache-dir)
-      _filedir -d
-      return $?
-    ;;
-    --cacert|--cert|--cert-key)
-      _filedir
-      return $?
-    ;;
-    -t|--taskfile)
-      _filedir yaml || return $?
-      _filedir yml
-      return $?
-    ;;
-    -o|--output)
-      COMPREPLY=( $( compgen -W "interleaved group prefixed" -- $cur ) )
-      return 0
-    ;;
-  esac
 
-  # Handle normal options.
+  if (( directive & 2 )); then
-  case "$cur" in
+    compopt -o nospace 2>/dev/null
-    -*)
+  fi
-      COMPREPLY=( $( compgen -W "$(_parse_help $1)" -- $cur ) )
-      return 0
-    ;;
-  esac
 
-  # Prepare task name completions.
-  local tasks=( $( "${words[@]}" --silent $_GO_TASK_COMPLETION_LIST_OPTION 2> /dev/null ) )
-  COMPREPLY=( $( compgen -W "${tasks[*]}" -- "$cur" ) )
-
-  # Post-process because task names might contain colons.
   __ltrim_colon_completions "$cur"
+
+  if (( ${#COMPREPLY[@]} == 0 )) && ! (( directive & 4 )); then
+    _filedir
+  fi
 }
 
 complete -F _task "$TASK_CMD"

completion/fish/task.fish

@@ -1,120 +1,46 @@
+# Thin wrapper around `task __complete`. All suggestion logic lives in the
+# Go engine — do not add completion logic here.
+
 set -l GO_TASK_PROGNAME (if set -q GO_TASK_PROGNAME; echo $GO_TASK_PROGNAME; else if set -q TASK_EXE; echo $TASK_EXE; else; echo task; end)
 
-# Cache variables for experiments (global)
+function __task_complete --inherit-variable GO_TASK_PROGNAME
-set -g __task_experiments_cache ""
+    set -l tokens (commandline -opc)
-set -g __task_experiments_cache_time 0
+    set -l current (commandline -ct)
+    set -l args
+    if test (count $tokens) -gt 1
+        set args $tokens[2..-1]
+    end
+    set args $args $current
 
-# Helper function to get experiments with 1-second cache
+    set -l output ($GO_TASK_PROGNAME __complete $args 2>/dev/null)
-function __task_get_experiments --inherit-variable GO_TASK_PROGNAME
+    set -l count (count $output)
-    set -l now (date +%s)
+    if test $count -eq 0
-    set -l ttl 1  # Cache for 1 second only
-
-    # Return cached value if still valid
-    if test (math "$now - $__task_experiments_cache_time") -lt $ttl
-        printf '%s\n' $__task_experiments_cache
         return
     end
 
-    # Refresh cache
+    set -l last $output[$count]
-    set -g __task_experiments_cache ($GO_TASK_PROGNAME --experiments 2>/dev/null)
+    if not string match -q ':*' -- $last
-    set -g __task_experiments_cache_time $now
+        # Protocol violation: emit raw lines as a fallback.
-    printf '%s\n' $__task_experiments_cache
+        for line in $output
-end
+            echo $line
-
-# Helper function to check if an experiment is enabled
-function __task_is_experiment_enabled
-    set -l experiment $argv[1]
-    __task_get_experiments | string match -qr "^\* $experiment:.*on"
-end
-
-function __task_get_tasks --description "Prints all available tasks with their description" --inherit-variable GO_TASK_PROGNAME
-  # Check if the global task is requested
-  set -l global_task false
-  commandline --current-process | read --tokenize --list --local cmd_args
-  for arg in $cmd_args
-    if test "_$arg" = "_--"
-      break # ignore arguments to be passed to the task
         end
-    if test "_$arg" = "_--global" -o "_$arg" = "_-g"
-      set global_task true
-      break
-    end
-  end
-
-  # Read the list of tasks (and potential errors)
-  if $global_task
-    $GO_TASK_PROGNAME --global --list-all
-  else
-    $GO_TASK_PROGNAME --list-all
-  end 2>&1 | read -lz rawOutput
-
-  # Return on non-zero exit code (for cases when there is no Taskfile found or etc.)
-  if test $status -ne 0
         return
     end
 
-  # Grab names and descriptions (if any) of the tasks
+    set -l directive (string replace -r '^:' '' -- $last)
-  set -l output (echo $rawOutput | sed -e '1d; s/\* \(.*\):[[:space:]]\{2,\}\(.*\)[[:space:]]\{2,\}(\(aliases.*\))/\1\t\2\t\3/' -e 's/\* \(.*\):[[:space:]]\{2,\}\(.*\)/\1\t\2/'| string split0)
+    # FilterFileExt / FilterDirs are handled by fish's native file completion
-  if test $output
+    # via the separate `complete` registrations below.
-    echo $output
+    if test (math "$directive & 8") -ne 0; or test (math "$directive & 16") -ne 0
+        return
+    end
+
+    if test $count -gt 1
+        for line in $output[1..(math $count - 1)]
+            echo $line
+        end
     end
 end
 
-complete -c $GO_TASK_PROGNAME \
+complete -c $GO_TASK_PROGNAME --no-files -a "(__task_complete)"
-  -d 'Runs the specified task(s). Falls back to the "default" task if no task name was specified, or lists all tasks if an unknown task name was specified.' \
+complete -c $GO_TASK_PROGNAME -s t -l taskfile -r -k -a "(__fish_complete_suffix .yml .yaml)"
-  -xa "(__task_get_tasks)" \
+complete -c $GO_TASK_PROGNAME -s d -l dir -xa "(__fish_complete_directories)"
-  -n "not __fish_seen_subcommand_from --"
-
-# Standard flags
-complete -c $GO_TASK_PROGNAME -s a -l list-all                  -d 'list all tasks'
-complete -c $GO_TASK_PROGNAME -s c -l color                     -d 'colored output (default true)'
-complete -c $GO_TASK_PROGNAME -s C -l concurrency               -d 'limit number of concurrent tasks'
-complete -c $GO_TASK_PROGNAME      -l completion                -d 'generate shell completion script' -xa "bash zsh fish powershell"
-complete -c $GO_TASK_PROGNAME -s d -l dir                       -d 'set directory of execution'
-complete -c $GO_TASK_PROGNAME      -l disable-fuzzy             -d 'disable fuzzy matching for task names'
-complete -c $GO_TASK_PROGNAME -s n -l dry                       -d 'compile and print tasks without executing'
-complete -c $GO_TASK_PROGNAME -s x -l exit-code                 -d 'pass-through exit code of task command'
-complete -c $GO_TASK_PROGNAME      -l experiments               -d 'list available experiments'
-complete -c $GO_TASK_PROGNAME -s F -l failfast                  -d 'when running tasks in parallel, stop all tasks if one fails'
-complete -c $GO_TASK_PROGNAME -s f -l force                     -d 'force execution even when up-to-date'
-complete -c $GO_TASK_PROGNAME -s g -l global                    -d 'run global Taskfile from home directory'
-complete -c $GO_TASK_PROGNAME -s h -l help                      -d 'show help'
-complete -c $GO_TASK_PROGNAME -s i -l init                      -d 'create new Taskfile'
-complete -c $GO_TASK_PROGNAME      -l insecure                  -d 'allow insecure Taskfile downloads'
-complete -c $GO_TASK_PROGNAME -s I -l interval                  -d 'interval to watch for changes'
-complete -c $GO_TASK_PROGNAME -s j -l json                      -d 'format task list as JSON'
-complete -c $GO_TASK_PROGNAME -s l -l list                      -d 'list tasks with descriptions'
-complete -c $GO_TASK_PROGNAME      -l nested                    -d 'nest namespaces when listing as JSON'
-complete -c $GO_TASK_PROGNAME      -l no-status                 -d 'ignore status when listing as JSON'
-complete -c $GO_TASK_PROGNAME      -l interactive               -d 'prompt for missing required variables'
-complete -c $GO_TASK_PROGNAME -s o -l output                    -d 'set output style' -xa "interleaved group prefixed"
-complete -c $GO_TASK_PROGNAME      -l output-group-begin        -d 'message template before grouped output'
-complete -c $GO_TASK_PROGNAME      -l output-group-end          -d 'message template after grouped output'
-complete -c $GO_TASK_PROGNAME      -l output-group-error-only   -d 'hide output from successful tasks'
-complete -c $GO_TASK_PROGNAME -s p -l parallel                  -d 'execute tasks in parallel'
-complete -c $GO_TASK_PROGNAME -s s -l silent                    -d 'disable echoing'
-complete -c $GO_TASK_PROGNAME      -l sort                      -d 'set task sorting order' -xa "default alphanumeric none"
-complete -c $GO_TASK_PROGNAME      -l status                    -d 'exit non-zero if tasks not up-to-date'
-complete -c $GO_TASK_PROGNAME      -l summary                   -d 'show task summary'
-complete -c $GO_TASK_PROGNAME -s t -l taskfile                  -d 'choose Taskfile to run'
-complete -c $GO_TASK_PROGNAME -s v -l verbose                   -d 'verbose output'
-complete -c $GO_TASK_PROGNAME      -l version                   -d 'show version'
-complete -c $GO_TASK_PROGNAME -s w -l watch                     -d 'watch mode, re-run on changes'
-complete -c $GO_TASK_PROGNAME -s y -l yes                       -d 'assume yes to all prompts'
-
-# Experimental flags (dynamically checked at completion time via -n condition)
-# GentleForce experiment
-complete -c $GO_TASK_PROGNAME -n "__task_is_experiment_enabled GENTLE_FORCE" -l force-all -d 'force execution of task and all dependencies'
-
-# RemoteTaskfiles experiment - Options
-complete -c $GO_TASK_PROGNAME -n "__task_is_experiment_enabled REMOTE_TASKFILES" -l offline          -d 'use only local or cached Taskfiles'
-complete -c $GO_TASK_PROGNAME -n "__task_is_experiment_enabled REMOTE_TASKFILES" -l timeout          -d 'timeout for remote Taskfile downloads'
-complete -c $GO_TASK_PROGNAME -n "__task_is_experiment_enabled REMOTE_TASKFILES" -l expiry           -d 'cache expiry duration'
-complete -c $GO_TASK_PROGNAME -n "__task_is_experiment_enabled REMOTE_TASKFILES" -l remote-cache-dir -d 'directory to cache remote Taskfiles' -xa "(__fish_complete_directories)"
-complete -c $GO_TASK_PROGNAME -n "__task_is_experiment_enabled REMOTE_TASKFILES" -l cacert           -d 'custom CA certificate for TLS' -r
-complete -c $GO_TASK_PROGNAME -n "__task_is_experiment_enabled REMOTE_TASKFILES" -l cert             -d 'client certificate for mTLS' -r
-complete -c $GO_TASK_PROGNAME -n "__task_is_experiment_enabled REMOTE_TASKFILES" -l cert-key         -d 'client certificate private key' -r
-
-# RemoteTaskfiles experiment - Operations
-complete -c $GO_TASK_PROGNAME -n "__task_is_experiment_enabled REMOTE_TASKFILES" -l download    -d 'download remote Taskfile'
-complete -c $GO_TASK_PROGNAME -n "__task_is_experiment_enabled REMOTE_TASKFILES" -l clear-cache -d 'clear remote Taskfile cache'

completion/ps/task.ps1

@@ -1,94 +1,61 @@
 using namespace System.Management.Automation
 
+# Thin wrapper around `task __complete`. All suggestion logic lives in the
+# Go engine — do not add completion logic here.
+
 $cmdNames = @('task') + (Get-Alias -Definition task,task.exe,*\task,*\task.exe -ErrorAction SilentlyContinue).Name | Select-Object -Unique
 
-Register-ArgumentCompleter -CommandName $cmdNames -ScriptBlock {
+Register-ArgumentCompleter -Native -CommandName $cmdNames -ScriptBlock {
-	param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameters)
+	param($wordToComplete, $commandAst, $cursorPosition)
 
-	if ($commandName.StartsWith('-')) {
+	$TaskExe = if ($env:TASK_EXE) { $env:TASK_EXE } else { 'task' }
-		$completions = @(
-			# Standard flags (alphabetical order)
-			[CompletionResult]::new('-a', '-a', [CompletionResultType]::ParameterName, 'list all tasks'),
-			[CompletionResult]::new('--list-all', '--list-all', [CompletionResultType]::ParameterName, 'list all tasks'),
-			[CompletionResult]::new('-c', '-c', [CompletionResultType]::ParameterName, 'colored output'),
-			[CompletionResult]::new('--color', '--color', [CompletionResultType]::ParameterName, 'colored output'),
-			[CompletionResult]::new('-C', '-C', [CompletionResultType]::ParameterName, 'limit concurrent tasks'),
-			[CompletionResult]::new('--concurrency', '--concurrency', [CompletionResultType]::ParameterName, 'limit concurrent tasks'),
-			[CompletionResult]::new('--completion', '--completion', [CompletionResultType]::ParameterName, 'generate shell completion'),
-			[CompletionResult]::new('-d', '-d', [CompletionResultType]::ParameterName, 'set directory'),
-			[CompletionResult]::new('--dir', '--dir', [CompletionResultType]::ParameterName, 'set directory'),
-			[CompletionResult]::new('--disable-fuzzy', '--disable-fuzzy', [CompletionResultType]::ParameterName, 'disable fuzzy matching'),
-			[CompletionResult]::new('-n', '-n', [CompletionResultType]::ParameterName, 'dry run'),
-			[CompletionResult]::new('--dry', '--dry', [CompletionResultType]::ParameterName, 'dry run'),
-			[CompletionResult]::new('-x', '-x', [CompletionResultType]::ParameterName, 'pass-through exit code'),
-			[CompletionResult]::new('--exit-code', '--exit-code', [CompletionResultType]::ParameterName, 'pass-through exit code'),
-			[CompletionResult]::new('--experiments', '--experiments', [CompletionResultType]::ParameterName, 'list experiments'),
-			[CompletionResult]::new('-F', '-F', [CompletionResultType]::ParameterName, 'fail fast on pallalel tasks'),
-			[CompletionResult]::new('--failfast', '--failfast', [CompletionResultType]::ParameterName, 'force execution'),
-			[CompletionResult]::new('-f', '-f', [CompletionResultType]::ParameterName, 'force execution'),
-			[CompletionResult]::new('--force', '--force', [CompletionResultType]::ParameterName, 'force execution'),
-			[CompletionResult]::new('-g', '-g', [CompletionResultType]::ParameterName, 'run global Taskfile'),
-			[CompletionResult]::new('--global', '--global', [CompletionResultType]::ParameterName, 'run global Taskfile'),
-			[CompletionResult]::new('-h', '-h', [CompletionResultType]::ParameterName, 'show help'),
-			[CompletionResult]::new('--help', '--help', [CompletionResultType]::ParameterName, 'show help'),
-			[CompletionResult]::new('-i', '-i', [CompletionResultType]::ParameterName, 'create new Taskfile'),
-			[CompletionResult]::new('--init', '--init', [CompletionResultType]::ParameterName, 'create new Taskfile'),
-			[CompletionResult]::new('--insecure', '--insecure', [CompletionResultType]::ParameterName, 'allow insecure downloads'),
-			[CompletionResult]::new('-I', '-I', [CompletionResultType]::ParameterName, 'watch interval'),
-			[CompletionResult]::new('--interval', '--interval', [CompletionResultType]::ParameterName, 'watch interval'),
-			[CompletionResult]::new('-j', '-j', [CompletionResultType]::ParameterName, 'format as JSON'),
-			[CompletionResult]::new('--json', '--json', [CompletionResultType]::ParameterName, 'format as JSON'),
-			[CompletionResult]::new('-l', '-l', [CompletionResultType]::ParameterName, 'list tasks'),
-			[CompletionResult]::new('--list', '--list', [CompletionResultType]::ParameterName, 'list tasks'),
-			[CompletionResult]::new('--nested', '--nested', [CompletionResultType]::ParameterName, 'nest namespaces in JSON'),
-			[CompletionResult]::new('--no-status', '--no-status', [CompletionResultType]::ParameterName, 'ignore status in JSON'),
-			[CompletionResult]::new('--interactive', '--interactive', [CompletionResultType]::ParameterName, 'prompt for missing required variables'),
-			[CompletionResult]::new('-o', '-o', [CompletionResultType]::ParameterName, 'set output style'),
-			[CompletionResult]::new('--output', '--output', [CompletionResultType]::ParameterName, 'set output style'),
-			[CompletionResult]::new('--output-group-begin', '--output-group-begin', [CompletionResultType]::ParameterName, 'template before group'),
-			[CompletionResult]::new('--output-group-end', '--output-group-end', [CompletionResultType]::ParameterName, 'template after group'),
-			[CompletionResult]::new('--output-group-error-only', '--output-group-error-only', [CompletionResultType]::ParameterName, 'hide successful output'),
-			[CompletionResult]::new('-p', '-p', [CompletionResultType]::ParameterName, 'execute in parallel'),
-			[CompletionResult]::new('--parallel', '--parallel', [CompletionResultType]::ParameterName, 'execute in parallel'),
-			[CompletionResult]::new('-s', '-s', [CompletionResultType]::ParameterName, 'silent mode'),
-			[CompletionResult]::new('--silent', '--silent', [CompletionResultType]::ParameterName, 'silent mode'),
-			[CompletionResult]::new('--sort', '--sort', [CompletionResultType]::ParameterName, 'task sorting order'),
-			[CompletionResult]::new('--status', '--status', [CompletionResultType]::ParameterName, 'check task status'),
-			[CompletionResult]::new('--summary', '--summary', [CompletionResultType]::ParameterName, 'show task summary'),
-			[CompletionResult]::new('-t', '-t', [CompletionResultType]::ParameterName, 'choose Taskfile'),
-			[CompletionResult]::new('--taskfile', '--taskfile', [CompletionResultType]::ParameterName, 'choose Taskfile'),
-			[CompletionResult]::new('-v', '-v', [CompletionResultType]::ParameterName, 'verbose output'),
-			[CompletionResult]::new('--verbose', '--verbose', [CompletionResultType]::ParameterName, 'verbose output'),
-			[CompletionResult]::new('--version', '--version', [CompletionResultType]::ParameterName, 'show version'),
-			[CompletionResult]::new('-w', '-w', [CompletionResultType]::ParameterName, 'watch mode'),
-			[CompletionResult]::new('--watch', '--watch', [CompletionResultType]::ParameterName, 'watch mode'),
-			[CompletionResult]::new('-y', '-y', [CompletionResultType]::ParameterName, 'assume yes'),
-			[CompletionResult]::new('--yes', '--yes', [CompletionResultType]::ParameterName, 'assume yes')
-		)
 
-		# Experimental flags (dynamically added based on enabled experiments)
+	# Words after the program name, truncated to the cursor.
-		$experiments = & task --experiments 2>$null | Out-String
+	$argsToPass = @()
-
+	$elements = $commandAst.CommandElements
-		if ($experiments -match '\* GENTLE_FORCE:.*on') {
+	if ($elements.Count -gt 1) {
-			$completions += [CompletionResult]::new('--force-all', '--force-all', [CompletionResultType]::ParameterName, 'force all dependencies')
+		for ($i = 1; $i -lt $elements.Count; $i++) {
+			$el = $elements[$i]
+			if ($el.Extent.StartOffset -ge $cursorPosition) { break }
+			$argsToPass += $el.ToString()
+		}
+	}
+	# The trailing word (possibly empty) must reach the engine so it knows
+	# the cursor sits on a fresh word.
+	if ($argsToPass.Count -gt 0 -and $argsToPass[-1] -eq $wordToComplete) {
+		$argsToPass[-1] = $wordToComplete
+	} else {
+		$argsToPass += $wordToComplete
 	}
 
-		if ($experiments -match '\* REMOTE_TASKFILES:.*on') {
+	$output = & $TaskExe __complete @argsToPass 2>$null
-			# Options
+	if (-not $output) { return }
-			$completions += [CompletionResult]::new('--offline', '--offline', [CompletionResultType]::ParameterName, 'use cached Taskfiles')
+
-			$completions += [CompletionResult]::new('--timeout', '--timeout', [CompletionResultType]::ParameterName, 'download timeout')
+	$lines = @($output)
-			$completions += [CompletionResult]::new('--expiry', '--expiry', [CompletionResultType]::ParameterName, 'cache expiry')
+	if ($lines.Count -eq 0) { return }
-			$completions += [CompletionResult]::new('--remote-cache-dir', '--remote-cache-dir', [CompletionResultType]::ParameterName, 'cache directory')
+	$last = $lines[-1]
-			$completions += [CompletionResult]::new('--cacert', '--cacert', [CompletionResultType]::ParameterName, 'custom CA certificate')
+	if (-not $last.StartsWith(':')) { return }
-			$completions += [CompletionResult]::new('--cert', '--cert', [CompletionResultType]::ParameterName, 'client certificate')
+
-			$completions += [CompletionResult]::new('--cert-key', '--cert-key', [CompletionResultType]::ParameterName, 'client private key')
+	$directive = [int]($last.Substring(1))
-			# Operations
+	$data = if ($lines.Count -gt 1) { $lines[0..($lines.Count - 2)] } else { @() }
-			$completions += [CompletionResult]::new('--download', '--download', [CompletionResultType]::ParameterName, 'download remote Taskfile')
+
-			$completions += [CompletionResult]::new('--clear-cache', '--clear-cache', [CompletionResultType]::ParameterName, 'clear cache')
+	# FilterFileExt
+	if ($directive -band 8) {
+		$patterns = $data | ForEach-Object { "*.$_" }
+		return Get-ChildItem -Path . -Include $patterns -File -ErrorAction SilentlyContinue |
+			ForEach-Object { [CompletionResult]::new($_.Name, $_.Name, [CompletionResultType]::ProviderItem, $_.Name) }
 	}
 
-		return $completions.Where{ $_.CompletionText.StartsWith($commandName) }
+	# FilterDirs
+	if ($directive -band 16) {
+		return Get-ChildItem -Path . -Directory -ErrorAction SilentlyContinue |
+			ForEach-Object { [CompletionResult]::new($_.Name, $_.Name, [CompletionResultType]::ProviderContainer, $_.Name) }
 	}
 
-	return 	$(task --list-all --silent) | Where-Object { $_.StartsWith($commandName) } | ForEach-Object { return $_ + " " }
+	return $data | ForEach-Object {
+		$parts = $_ -split "`t", 2
+		$value = $parts[0]
+		$desc = if ($parts.Count -gt 1 -and $parts[1]) { $parts[1] } else { $value }
+		[CompletionResult]::new($value, $value, [CompletionResultType]::ParameterValue, $desc)
+	}
 }

completion/zsh/_task

@@ -1,171 +1,65 @@
 #compdef task
-typeset -A opt_args
+#
+# Thin wrapper around `task __complete`. All suggestion logic lives in the
+# Go engine — do not add completion logic here.
+
 TASK_CMD="${TASK_EXE:-task}"
-compdef _task "$TASK_CMD"
-
-_GO_TASK_COMPLETION_LIST_OPTION="${GO_TASK_COMPLETION_LIST_OPTION:---list-all}"
-
-# Check if an experiment is enabled
-function __task_is_experiment_enabled() {
-    local experiment=$1
-    task --experiments 2>/dev/null | grep -q "^\* ${experiment}:.*on"
-}
-
-# Listing commands from Taskfile.yml
-function __task_list() {
-    local -a scripts cmd task_aliases match mbegin mend
-    local -i enabled=0
-    local taskfile item task desc task_alias
-
-    cmd=($TASK_CMD)
-    taskfile=${(Qv)opt_args[(i)-t|--taskfile]}
-    taskfile=${taskfile//\~/$HOME}
-
-    for arg in "${words[@]:0:$CURRENT}"; do
-        if [[ "$arg" = "--" ]]; then
-            # Use default completion for words after `--` as they are CLI_ARGS.
-            _default
-            return 0
-        fi
-    done
-
-    if [[ -n "$taskfile" && -f "$taskfile" ]]; then
-        cmd+=(--taskfile "$taskfile")
-    fi
-
-    # Check if global flag is set
-    if (( ${+opt_args[-g]} || ${+opt_args[--global]} )); then
-        cmd+=(--global)
-    fi
-
-    if output=$("${cmd[@]}" $_GO_TASK_COMPLETION_LIST_OPTION 2>/dev/null); then
-        enabled=1
-    fi
-
-    (( enabled )) || return 0
-
-    scripts=()
-
-    # Read zstyle verbose option (default = true via -T)
-    local show_desc
-    zstyle -T ":completion:${curcontext}:" verbose && show_desc=true || show_desc=false
-
-    # Read zstyle show-aliases option (default = true via -T)
-    local show_aliases
-    zstyle -T ":completion:${curcontext}:" show-aliases && show_aliases=true || show_aliases=false
-
-    for item in "${(@)${(f)output}[2,-1]#\* }"; do
-        task="${item%%:[[:space:]]*}"
-
-        # Extract the aliases listed in the trailing "(aliases: a, b)" column.
-        # NB: `aliases` is a reserved zsh parameter, so use a different name.
-        task_aliases=()
-        if [[ "$show_aliases" == "true" && "$item" == (#b)*'(aliases: '(*)')' ]]; then
-            task_aliases=( "${(@s:, :)match[1]}" )
-        fi
-
-        if [[ "$show_desc" == "true" ]]; then
-            local desc="${item##[^[:space:]]##[[:space:]]##}"
-            scripts+=( "${task//:/\\:}:$desc" )
-            for task_alias in $task_aliases; do
-                scripts+=( "${task_alias//:/\\:}:$desc (alias of $task)" )
-            done
-        else
-            scripts+=( "$task" )
-            for task_alias in $task_aliases; do
-                scripts+=( "$task_alias" )
-            done
-        fi
-    done
-
-    if [[ "$show_desc" == "true" ]]; then
-        _describe 'Task to run' scripts
-    else
-        compadd -Q -a scripts
-    fi
-}
 
 _task() {
-    local -a standard_args operation_args
+    local -a args lines completions opts
+    local output directive line
 
-    standard_args=(
+    # (@) preserves a trailing empty string, which the engine relies on to
-        '(-C --concurrency)'{-C,--concurrency}'[limit number of concurrent tasks]: '
+    # know the cursor is on a fresh word.
-        '(-p --parallel)'{-p,--parallel}'[run command-line tasks in parallel]'
+    args=("${(@)words[2,CURRENT]}")
-        '(-F --failfast)'{-F,--failfast}'[when running tasks in parallel, stop all tasks if one fails]'
+    (( ${#args} == 0 )) && args=("")
-        '(-f --force)'{-f,--force}'[run even if task is up-to-date]'
-        '(-c --color)'{-c,--color}'[colored output]'
-        '(--completion)--completion[generate shell completion script]:shell:(bash zsh fish powershell)'
-        '(-d --dir)'{-d,--dir}'[dir to run in]:execution dir:_dirs'
-        '(--disable-fuzzy)--disable-fuzzy[disable fuzzy matching for task names]'
-        '(-n --dry)'{-n,--dry}'[compiles and prints tasks without executing]'
-        '(--dry)--dry[dry-run mode, compile and print tasks only]'
-        '(-x --exit-code)'{-x,--exit-code}'[pass-through exit code of task command]'
-        '(--experiments)--experiments[list available experiments]'
-        '(-g --global)'{-g,--global}'[run global Taskfile from home directory]'
-        '(--insecure)--insecure[allow insecure Taskfile downloads]'
-        '(-I --interval)'{-I,--interval}'[interval to watch for changes]:duration: '
-        '(-j --json)'{-j,--json}'[format task list as JSON]'
-        '(--nested)--nested[nest namespaces when listing as JSON]'
-        '(--no-status)--no-status[ignore status when listing as JSON]'
-        '(--interactive)--interactive[prompt for missing required variables]'
-        '(-o --output)'{-o,--output}'[set output style]:style:(interleaved group prefixed)'
-        '(--output-group-begin)--output-group-begin[message template before grouped output]:template text: '
-        '(--output-group-end)--output-group-end[message template after grouped output]:template text: '
-        '(--output-group-error-only)--output-group-error-only[hide output from successful tasks]'
-        '(-s --silent)'{-s,--silent}'[disable echoing]'
-        '(--sort)--sort[set task sorting order]:order:(default alphanumeric none)'
-        '(--status)--status[exit non-zero if supplied tasks not up-to-date]'
-        '(--summary)--summary[show summary\: field from tasks instead of running them]'
-        '(-t --taskfile)'{-t,--taskfile}'[specify a different taskfile]:taskfile:_files'
-        '(-v --verbose)'{-v,--verbose}'[verbose mode]'
-        '(-w --watch)'{-w,--watch}'[watch-mode for given tasks, re-run when inputs change]'
-        '(-y --yes)'{-y,--yes}'[assume yes to all prompts]'
-    )
 
-    # Experimental flags (dynamically added based on enabled experiments)
+    output=$("$TASK_CMD" __complete "${args[@]}" 2>/dev/null)
-    # Options (modify behavior)
+    if [[ -z "$output" ]]; then
-    if __task_is_experiment_enabled "GENTLE_FORCE"; then
+        _files
-        standard_args+=('(--force-all)--force-all[force execution of task and all dependencies]')
+        return
     fi
 
-    if __task_is_experiment_enabled "REMOTE_TASKFILES"; then
+    lines=("${(f)output}")
-        standard_args+=(
+    directive="${lines[-1]#:}"
-            '(--offline --download)--offline[use only local or cached Taskfiles]'
+    lines=("${(@)lines[1,-2]}")
-            '(--timeout)--timeout[timeout for remote Taskfile downloads]:duration: '
+
-            '(--expiry)--expiry[cache expiry duration]:duration: '
+    if (( directive & 8 )); then
-            '(--remote-cache-dir)--remote-cache-dir[directory to cache remote Taskfiles]:cache dir:_dirs'
+        local -a globs
-            '(--cacert)--cacert[custom CA certificate for TLS]:file:_files'
+        for line in "${lines[@]}"; do
-            '(--cert)--cert[client certificate for mTLS]:file:_files'
+            globs+=("*.${line}")
-            '(--cert-key)--cert-key[client certificate private key]:file:_files'
+        done
-        )
+        _files -g "(${(j:|:)globs})"
+        return
     fi
 
-    operation_args=(
+    if (( directive & 16 )); then
-        # Task names completion (can be specified multiple times)
+        _path_files -/
-        '(operation)*: :__task_list'
+        return
-        # Operational args completion (mutually exclusive)
-        + '(operation)'
-            '(*)'{-l,--list}'[list describable tasks]'
-            '(*)'{-a,--list-all}'[list all tasks]'
-            '(*)'{-i,--init}'[create new Taskfile.yml]'
-            '(- *)'{-h,--help}'[show help]'
-            '(- *)--version[show version and exit]'
-    )
-
-    # Experimental operations (dynamically added based on enabled experiments)
-    if __task_is_experiment_enabled "REMOTE_TASKFILES"; then
-        standard_args+=(
-            '(--offline --clear-cache)--download[download remote Taskfile]'
-        )
-        operation_args+=(
-            '(* --download)--clear-cache[clear remote Taskfile cache]'
-        )
     fi
 
-    _arguments -S $standard_args $operation_args
+    # `:` inside the value must be escaped: _describe splits on the first
+    # unescaped colon (e.g. "docs:serve" would otherwise become value "docs").
+    local value desc
+    for line in "${lines[@]}"; do
+        if [[ "$line" == *$'\t'* ]]; then
+            value="${line%%$'\t'*}"
+            desc="${line#*$'\t'}"
+            completions+=("${value//:/\\:}:$desc")
+        else
+            completions+=("${line//:/\\:}")
+        fi
+    done
+
+    (( directive & 2 ))  && opts+=(-S '')
+    (( directive & 32 )) && opts+=(-V)
+
+    if (( ${#completions} > 0 )); then
+        _describe -t tasks 'task' completions "${opts[@]}"
+    fi
+
+    (( directive & 4 )) && return
+    _files
 }
 
-# don't run the completion function when being source-ed or eval-ed
+compdef _task "$TASK_CMD"
-if [ "$funcstack[1]" = "_task" ]; then
-    _task "$@"
-fi

internal/complete/complete.go

@@ -0,0 +1,30 @@
+// Package complete implements the `task __complete` protocol consumed by the
+// shell completion wrappers. The protocol mirrors cobra v2 so a future
+// migration stays cheap.
+package complete
+
+import "os"
+
+const CommandName = "__complete"
+
+func IsActive() bool {
+	return len(os.Args) >= 2 && os.Args[1] == CommandName
+}
+
+// Directive mirrors cobra's ShellCompDirective bitfield.
+type Directive int
+
+const (
+	DirectiveDefault       Directive = 0
+	DirectiveError         Directive = 1 << 0
+	DirectiveNoSpace       Directive = 1 << 1
+	DirectiveNoFileComp    Directive = 1 << 2
+	DirectiveFilterFileExt Directive = 1 << 3
+	DirectiveFilterDirs    Directive = 1 << 4
+	DirectiveKeepOrder     Directive = 1 << 5
+)
+
+type Suggestion struct {
+	Value       string
+	Description string
+}

internal/complete/complete_test.go

@@ -0,0 +1,279 @@
+package complete_test
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/spf13/pflag"
+	"github.com/stretchr/testify/require"
+
+	"github.com/go-task/task/v3"
+	"github.com/go-task/task/v3/internal/complete"
+)
+
+func newTestFlagSet() *pflag.FlagSet {
+	fs := pflag.NewFlagSet("test", pflag.ContinueOnError)
+	var b bool
+	var s string
+	fs.BoolVarP(&b, "list-all", "a", false, "Lists all tasks")
+	fs.BoolVarP(&b, "list", "l", false, "Lists tasks with descriptions")
+	fs.BoolVarP(&b, "verbose", "v", false, "Verbose mode")
+	fs.StringVarP(&s, "taskfile", "t", "", "Taskfile path")
+	fs.StringVarP(&s, "dir", "d", "", "Run dir")
+	fs.StringVarP(&s, "output", "o", "", "Output style")
+	fs.StringVar(&s, "sort", "", "Sort order")
+	fs.StringVar(&s, "cacert", "", "CA cert path")
+	return fs
+}
+
+const testTaskfile = `version: '3'
+
+vars:
+  ALLOWED_ENVS:
+    - dev
+    - staging
+    - prod
+
+tasks:
+  deploy:
+    desc: Deploy the application
+    aliases: [dep, ship]
+    requires:
+      vars:
+        - name: ENV
+          enum:
+            - dev
+            - staging
+            - prod
+        - REGION
+    cmds:
+      - 'echo {{.ENV}} {{.REGION}}'
+
+  build:
+    desc: Build it
+    cmds:
+      - 'echo build'
+
+  dynenum:
+    desc: Dynamic enum
+    requires:
+      vars:
+        - name: ENV
+          enum:
+            ref: .ALLOWED_ENVS
+    cmds:
+      - 'echo {{.ENV}}'
+
+  docs:serve:
+    desc: Serve docs locally
+    cmds:
+      - 'echo serving'
+`
+
+func setupExecutor(t *testing.T) *task.Executor {
+	t.Helper()
+	dir := t.TempDir()
+	require.NoError(t, os.WriteFile(filepath.Join(dir, "Taskfile.yml"), []byte(testTaskfile), 0o644))
+
+	e := task.NewExecutor(
+		task.WithDir(dir),
+		task.WithStdout(io.Discard),
+		task.WithStderr(io.Discard),
+		task.WithVersionCheck(false),
+	)
+	require.NoError(t, e.Setup())
+	return e
+}
+
+func TestComplete_TaskNames(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{""})
+
+	require.ElementsMatch(t,
+		[]string{"build", "deploy", "dep", "ship", "dynenum", "docs:serve"},
+		values(suggs),
+	)
+	require.Equal(t, complete.DirectiveNoFileComp, dir)
+	require.Contains(t, descriptions(suggs), "Deploy the application")
+}
+
+func TestComplete_AliasResolvesToTaskVars(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"dep", ""})
+	require.Equal(t, []string{"ENV=dev", "ENV=staging", "ENV=prod", "REGION="}, values(suggs))
+	require.Equal(t, complete.DirectiveNoSpace|complete.DirectiveNoFileComp, dir)
+}
+
+func TestComplete_StaticEnum(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"deploy", ""})
+
+	require.Equal(t, []string{"ENV=dev", "ENV=staging", "ENV=prod", "REGION="}, values(suggs))
+	require.Equal(t, complete.DirectiveNoSpace|complete.DirectiveNoFileComp, dir)
+}
+
+func TestComplete_EnumRef(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, _ := complete.Complete(e, newTestFlagSet(), []string{"dynenum", ""})
+	require.Equal(t, []string{"ENV=dev", "ENV=staging", "ENV=prod"}, values(suggs))
+}
+
+func TestComplete_NoRequires(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"build", ""})
+	require.Empty(t, suggs)
+	require.Equal(t, complete.DirectiveNoFileComp, dir)
+}
+
+func TestComplete_FlagValueNotConfusedWithTaskName(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"--dir", "deploy", ""})
+	require.ElementsMatch(t,
+		[]string{"build", "deploy", "dep", "ship", "dynenum", "docs:serve"},
+		values(suggs),
+	)
+	require.Equal(t, complete.DirectiveNoFileComp, dir)
+}
+
+func TestComplete_NamespacedTaskName(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"docs:serve", ""})
+	require.Empty(t, suggs)
+	require.Equal(t, complete.DirectiveNoFileComp, dir)
+}
+
+func TestComplete_FlagValueInlineEquals(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"--output="})
+	require.Equal(t, []string{"interleaved", "group", "prefixed"}, values(suggs))
+	require.Equal(t, complete.DirectiveNoFileComp, dir)
+}
+
+func TestComplete_AfterDash(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"deploy", "--", ""})
+	require.Empty(t, suggs)
+	require.Equal(t, complete.DirectiveDefault, dir)
+}
+
+func TestComplete_FlagNames(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"-"})
+	require.NotEmpty(t, suggs)
+	require.Equal(t, complete.DirectiveNoFileComp, dir)
+
+	vals := values(suggs)
+	require.Contains(t, vals, "--list-all")
+	require.Contains(t, vals, "--taskfile")
+	require.Contains(t, vals, "-a")
+}
+
+func TestComplete_EnumFlagValue_Output(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"--output", ""})
+	require.Equal(t, []string{"interleaved", "group", "prefixed"}, values(suggs))
+	require.Equal(t, complete.DirectiveNoFileComp, dir)
+}
+
+func TestComplete_EnumFlagValue_Sort(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, _ := complete.Complete(e, newTestFlagSet(), []string{"--sort", ""})
+	require.Equal(t, []string{"default", "alphanumeric", "none"}, values(suggs))
+}
+
+func TestComplete_PathFlag_Taskfile(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"--taskfile", ""})
+	require.Equal(t, []string{"yml", "yaml"}, values(suggs))
+	require.Equal(t, complete.DirectiveFilterFileExt, dir)
+}
+
+func TestComplete_PathFlag_Dir(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"--dir", ""})
+	require.Empty(t, suggs)
+	require.Equal(t, complete.DirectiveFilterDirs, dir)
+}
+
+func TestComplete_PathFlag_Cacert(t *testing.T) {
+	t.Parallel()
+
+	e := setupExecutor(t)
+	suggs, dir := complete.Complete(e, newTestFlagSet(), []string{"--cacert", ""})
+	require.Empty(t, suggs)
+	require.Equal(t, complete.DirectiveDefault, dir)
+}
+
+func TestComplete_NilExecutor(t *testing.T) {
+	t.Parallel()
+
+	suggs, dir := complete.Complete(nil, newTestFlagSet(), []string{"-"})
+	require.NotEmpty(t, suggs)
+	require.Equal(t, complete.DirectiveNoFileComp, dir)
+}
+
+func TestWrite_Format(t *testing.T) {
+	t.Parallel()
+
+	var buf bytes.Buffer
+	complete.Write(&buf, []complete.Suggestion{
+		{Value: "deploy", Description: "Deploy the app"},
+		{Value: "build"},
+	}, complete.DirectiveNoSpace|complete.DirectiveNoFileComp)
+	require.Equal(t, "deploy\tDeploy the app\nbuild\n:6\n", buf.String())
+}
+
+func TestWrite_EmptyWithDirective(t *testing.T) {
+	t.Parallel()
+
+	var buf bytes.Buffer
+	complete.Write(&buf, nil, complete.DirectiveFilterDirs)
+	require.Equal(t, ":16\n", buf.String())
+}
+
+func values(suggs []complete.Suggestion) []string {
+	out := make([]string, 0, len(suggs))
+	for _, s := range suggs {
+		out = append(out, s.Value)
+	}
+	return out
+}
+
+func descriptions(suggs []complete.Suggestion) []string {
+	out := make([]string, 0, len(suggs))
+	for _, s := range suggs {
+		out = append(out, s.Description)
+	}
+	return out
+}

internal/complete/context.go

@@ -0,0 +1,65 @@
+package complete
+
+import (
+	"strings"
+
+	"github.com/spf13/pflag"
+)
+
+type completionContext struct {
+	toComplete string
+	prev       string
+	taskName   string
+	afterDash  bool
+}
+
+// parseContext infers the cursor position from args. fs is needed to skip the
+// word following a value-taking flag, otherwise `task --dir deploy` would
+// mistake "deploy" (the directory) for a task name.
+func parseContext(args []string, knownTasks []string, fs *pflag.FlagSet) completionContext {
+	ctx := completionContext{}
+	if len(args) == 0 {
+		return ctx
+	}
+
+	ctx.toComplete = args[len(args)-1]
+	if len(args) >= 2 {
+		ctx.prev = args[len(args)-2]
+	}
+
+	known := make(map[string]struct{}, len(knownTasks))
+	for _, t := range knownTasks {
+		known[t] = struct{}{}
+	}
+
+	skipNext := false
+	for _, w := range args[:len(args)-1] {
+		if skipNext {
+			skipNext = false
+			continue
+		}
+		if w == "--" {
+			ctx.afterDash = true
+			continue
+		}
+		if ctx.afterDash {
+			continue
+		}
+		if strings.HasPrefix(w, "-") {
+			if !strings.Contains(w, "=") {
+				if f := matchFlagName(fs, w); f != nil && flagTakesValue(f) {
+					skipNext = true
+				}
+			}
+			continue
+		}
+		if strings.Contains(w, "=") {
+			continue
+		}
+		if _, ok := known[w]; ok {
+			ctx.taskName = w
+		}
+	}
+
+	return ctx
+}

internal/complete/engine.go

@@ -0,0 +1,171 @@
+package complete
+
+import (
+	"strings"
+
+	"github.com/spf13/pflag"
+
+	"github.com/go-task/task/v3"
+	"github.com/go-task/task/v3/internal/templater"
+	"github.com/go-task/task/v3/taskfile/ast"
+)
+
+// Complete is the single entry point used by `task __complete`. e may be nil
+// when the Taskfile failed to load; flag completion still works in that case.
+func Complete(e *task.Executor, fs *pflag.FlagSet, args []string) ([]Suggestion, Directive) {
+	knownTasks := taskNames(e)
+	ctx := parseContext(args, knownTasks, fs)
+
+	if ctx.afterDash {
+		return nil, DirectiveDefault
+	}
+
+	if ctx.prev != "" {
+		if flag := matchFlagName(fs, ctx.prev); flag != nil && flagTakesValue(flag) {
+			return completeFlagValue(flag.Name, ctx.toComplete)
+		}
+	}
+
+	if strings.HasPrefix(ctx.toComplete, "-") {
+		if eqIdx := strings.Index(ctx.toComplete, "="); eqIdx != -1 {
+			flagWord := ctx.toComplete[:eqIdx]
+			partial := ctx.toComplete[eqIdx+1:]
+			if f := matchFlagName(fs, flagWord); f != nil && flagTakesValue(f) {
+				return completeFlagValue(f.Name, partial)
+			}
+		}
+		return listFlags(fs), DirectiveNoFileComp
+	}
+
+	if ctx.taskName != "" && e != nil && e.Taskfile != nil {
+		return completeTaskVars(e, ctx.taskName, ctx.toComplete)
+	}
+
+	return completeTaskNames(e), DirectiveNoFileComp
+}
+
+func taskNames(e *task.Executor) []string {
+	if e == nil || e.Taskfile == nil {
+		return nil
+	}
+	var out []string
+	for t := range e.Taskfile.Tasks.Values(nil) {
+		if t.Internal {
+			continue
+		}
+		out = append(out, strings.TrimSuffix(t.Task, ":"))
+		for _, alias := range t.Aliases {
+			out = append(out, strings.TrimSuffix(alias, ":"))
+		}
+	}
+	return out
+}
+
+func completeTaskNames(e *task.Executor) []Suggestion {
+	if e == nil || e.Taskfile == nil {
+		return nil
+	}
+	tasks, err := e.GetTaskList(task.FilterOutInternal)
+	if err != nil {
+		return nil
+	}
+	out := make([]Suggestion, 0, len(tasks))
+	for _, t := range tasks {
+		out = append(out, Suggestion{
+			Value:       strings.TrimSuffix(t.Task, ":"),
+			Description: t.Desc,
+		})
+		for _, alias := range t.Aliases {
+			out = append(out, Suggestion{
+				Value:       strings.TrimSuffix(alias, ":"),
+				Description: t.Desc,
+			})
+		}
+	}
+	return out
+}
+
+func completeFlagValue(flagName, toComplete string) ([]Suggestion, Directive) {
+	if dir, ok := flagDirective[flagName]; ok {
+		switch dir {
+		case DirectiveFilterFileExt:
+			suggs := make([]Suggestion, 0, len(taskfileExtensions))
+			for _, ext := range taskfileExtensions {
+				suggs = append(suggs, Suggestion{Value: ext})
+			}
+			return suggs, DirectiveFilterFileExt
+		case DirectiveFilterDirs:
+			return nil, DirectiveFilterDirs
+		default:
+			return nil, DirectiveDefault
+		}
+	}
+
+	if values, ok := flagEnums[flagName]; ok {
+		out := make([]Suggestion, 0, len(values))
+		for _, v := range values {
+			out = append(out, Suggestion{Value: v})
+		}
+		_ = toComplete
+		return out, DirectiveNoFileComp
+	}
+
+	return nil, DirectiveDefault
+}
+
+func completeTaskVars(e *task.Executor, taskName, toComplete string) ([]Suggestion, Directive) {
+	compiled, err := e.FastCompiledTask(&task.Call{Task: taskName})
+	if err != nil || compiled == nil || compiled.Requires == nil {
+		return nil, DirectiveNoFileComp
+	}
+
+	cache := &templater.Cache{Vars: compiled.Vars}
+	out := make([]Suggestion, 0, 8)
+	for _, v := range compiled.Requires.Vars {
+		if v == nil || v.Name == "" {
+			continue
+		}
+		values := enumValues(v.Enum, cache)
+		if len(values) == 0 {
+			out = append(out, Suggestion{Value: v.Name + "="})
+			continue
+		}
+		for _, val := range values {
+			out = append(out, Suggestion{Value: v.Name + "=" + val})
+		}
+	}
+	_ = toComplete
+	if len(out) == 0 {
+		return nil, DirectiveNoFileComp
+	}
+	return out, DirectiveNoSpace | DirectiveNoFileComp
+}
+
+func enumValues(enum *ast.Enum, cache *templater.Cache) []string {
+	if enum == nil {
+		return nil
+	}
+	if len(enum.Value) > 0 {
+		return enum.Value
+	}
+	if enum.Ref == "" {
+		return nil
+	}
+	resolved := templater.ResolveRef(enum.Ref, cache)
+	if cache.Err() != nil {
+		return nil
+	}
+	arr, ok := resolved.([]any)
+	if !ok {
+		return nil
+	}
+	out := make([]string, 0, len(arr))
+	for _, item := range arr {
+		s, ok := item.(string)
+		if !ok {
+			return nil
+		}
+		out = append(out, s)
+	}
+	return out
+}

internal/complete/flags.go

@@ -0,0 +1,71 @@
+package complete
+
+import (
+	"sort"
+	"strings"
+
+	"github.com/spf13/pflag"
+)
+
+// flagEnums lists allowed values for enum-style flags. Keep in sync with the
+// help strings in internal/flags/flags.go.
+var flagEnums = map[string][]string{
+	"output":     {"interleaved", "group", "prefixed"},
+	"sort":       {"default", "alphanumeric", "none"},
+	"completion": {"bash", "zsh", "fish", "powershell"},
+}
+
+var flagDirective = map[string]Directive{
+	"taskfile":         DirectiveFilterFileExt,
+	"dir":              DirectiveFilterDirs,
+	"remote-cache-dir": DirectiveFilterDirs,
+	"cacert":           DirectiveDefault,
+	"cert":             DirectiveDefault,
+	"cert-key":         DirectiveDefault,
+}
+
+var taskfileExtensions = []string{"yml", "yaml"}
+
+// flagTakesValue is false for boolean switches (NoOptDefVal == "true").
+func flagTakesValue(f *pflag.Flag) bool {
+	return f.NoOptDefVal == ""
+}
+
+// listFlags walks fs at call time so experiment-gated flags appear or
+// disappear based on the active experiments.
+func listFlags(fs *pflag.FlagSet) []Suggestion {
+	if fs == nil {
+		return nil
+	}
+	out := make([]Suggestion, 0, 64)
+	fs.VisitAll(func(f *pflag.Flag) {
+		if f.Hidden || f.Deprecated != "" {
+			return
+		}
+		out = append(out, Suggestion{
+			Value:       "--" + f.Name,
+			Description: f.Usage,
+		})
+		if f.Shorthand != "" {
+			out = append(out, Suggestion{
+				Value:       "-" + f.Shorthand,
+				Description: f.Usage,
+			})
+		}
+	})
+	sort.Slice(out, func(i, j int) bool { return out[i].Value < out[j].Value })
+	return out
+}
+
+func matchFlagName(fs *pflag.FlagSet, word string) *pflag.Flag {
+	if fs == nil {
+		return nil
+	}
+	switch {
+	case strings.HasPrefix(word, "--"):
+		return fs.Lookup(strings.TrimPrefix(word, "--"))
+	case strings.HasPrefix(word, "-") && len(word) == 2:
+		return fs.ShorthandLookup(word[1:])
+	}
+	return nil
+}

internal/complete/output.go

@@ -0,0 +1,28 @@
+package complete
+
+import (
+	"fmt"
+	"io"
+	"strings"
+)
+
+// Write emits the cobra-v2 completion protocol: one `value\tdescription` (or
+// bare `value`) per suggestion, followed by a trailing `:<directive>` line
+// that shell wrappers split off even when there are zero suggestions.
+func Write(w io.Writer, suggs []Suggestion, dir Directive) {
+	for _, s := range suggs {
+		value := sanitize(s.Value)
+		desc := sanitize(s.Description)
+		if desc == "" {
+			fmt.Fprintln(w, value)
+			continue
+		}
+		fmt.Fprintf(w, "%s\t%s\n", value, desc)
+	}
+	fmt.Fprintf(w, ":%d\n", dir)
+}
+
+func sanitize(s string) string {
+	r := strings.NewReplacer("\n", " ", "\r", " ", "\t", " ")
+	return r.Replace(s)
+}

internal/editors/output.go

@@ -20,6 +20,11 @@ type (
 		Aliases  []string      `json:"aliases"`
 		UpToDate *bool         `json:"up_to_date,omitempty"`
 		Location *Location     `json:"location"`
+		Requires []RequiredVar `json:"requires,omitempty"`
+	}
+	RequiredVar struct {
+		Name string   `json:"name"`
+		Enum []string `json:"enum,omitempty"`
 	}
 	// Location describes a task's location in a taskfile
 	Location struct {
@@ -45,9 +50,28 @@ func NewTask(task *ast.Task) Task {
 			Column:   task.Location.Column,
 			Taskfile: task.Location.Taskfile,
 		},
+		Requires: newRequiredVars(task.Requires),
 	}
 }
 
+func newRequiredVars(requires *ast.Requires) []RequiredVar {
+	if requires == nil || len(requires.Vars) == 0 {
+		return nil
+	}
+	out := make([]RequiredVar, 0, len(requires.Vars))
+	for _, v := range requires.Vars {
+		if v == nil {
+			continue
+		}
+		rv := RequiredVar{Name: v.Name}
+		if v.Enum != nil && len(v.Enum.Value) > 0 {
+			rv.Enum = append([]string{}, v.Enum.Value...)
+		}
+		out = append(out, rv)
+	}
+	return out
+}
+
 func (parent *Namespace) AddNamespace(namespacePath []string, task Task) {
 	if len(namespacePath) == 0 {
 		return

internal/flags/flags.go

@@ -14,6 +14,7 @@ import (
 	"github.com/go-task/task/v3"
 	"github.com/go-task/task/v3/errors"
 	"github.com/go-task/task/v3/experiments"
+	"github.com/go-task/task/v3/internal/complete"
 	"github.com/go-task/task/v3/internal/env"
 	"github.com/go-task/task/v3/internal/sort"
 	"github.com/go-task/task/v3/taskfile/ast"
@@ -177,6 +178,13 @@ func init() {
 		pflag.StringVar(&Cert, "cert", getConfig(config, "REMOTE_CERT", func() *string { return config.Remote.Cert }, ""), "Path to a client certificate for HTTPS connections.")
 		pflag.StringVar(&CertKey, "cert-key", getConfig(config, "REMOTE_CERT_KEY", func() *string { return config.Remote.CertKey }, ""), "Path to a client certificate key for HTTPS connections.")
 	}
+	// In completion mode the user's `--flag` words must reach the engine
+	// untouched. The BoolVar/StringVar calls above already populated
+	// pflag.CommandLine, which is all the engine needs.
+	if complete.IsActive() {
+		return
+	}
+
 	pflag.Parse()
 
 	// Auto-detect color based on environment when not explicitly configured

taskfile/node.go

@@ -73,7 +73,7 @@ func NewNode(
 	return node, err
 }
 
-func IsRemoteEntrypoint(entrypoint string) bool {
+func isRemoteEntrypoint(entrypoint string) bool {
 	scheme, _ := getScheme(entrypoint)
 	switch scheme {
 	case "git", "http", "https":

taskfile/node_file.go

@@ -60,7 +60,7 @@ func (node *FileNode) Read() ([]byte, error) {
 
 func (node *FileNode) ResolveEntrypoint(entrypoint string) (string, error) {
 	// If the file is remote, we don't need to resolve the path
-	if IsRemoteEntrypoint(entrypoint) {
+	if isRemoteEntrypoint(entrypoint) {
 		return entrypoint, nil
 	}
 

taskfile/node_git.go

@@ -188,7 +188,7 @@ func (node *GitNode) ReadContext(ctx context.Context) ([]byte, error) {
 
 func (node *GitNode) ResolveEntrypoint(entrypoint string) (string, error) {
 	// If the file is remote, we don't need to resolve the path
-	if IsRemoteEntrypoint(entrypoint) {
+	if isRemoteEntrypoint(entrypoint) {
 		return entrypoint, nil
 	}
 

taskfile/node_stdin.go

@@ -42,7 +42,7 @@ func (node *StdinNode) Read() ([]byte, error) {
 
 func (node *StdinNode) ResolveEntrypoint(entrypoint string) (string, error) {
 	// If the file is remote, we don't need to resolve the path
-	if IsRemoteEntrypoint(entrypoint) {
+	if isRemoteEntrypoint(entrypoint) {
 		return entrypoint, nil
 	}
 

website/src/docs/experiments/remote-taskfiles.md

@@ -190,21 +190,6 @@ includes:
   my-remote-namespace: https://{{.TOKEN}}@raw.githubusercontent.com/my-org/my-repo/main/Taskfile.yml
 ```
 
-## Special Variables
-
-The file-path [special variables](../reference/templating.md#file-paths) behave
-differently when a Taskfile is loaded from a remote source, because there is no
-local file or directory that corresponds 1:1 to the Taskfile:
-
-| Variable                     | Value when loaded remotely                                                                                                                             |
-| ---------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ |
-| `TASKFILE` / `ROOT_TASKFILE` | The original URL, unchanged                                                                                                                            |
-| `TASKFILE_DIR` / `ROOT_DIR`  | Empty string — a directory variable cannot point to a URL                                                                                              |
-| `TASK_DIR`                   | Resolved against `USER_WORKING_DIR` (relative `dir:` → joined with `USER_WORKING_DIR`, empty `dir:` → `USER_WORKING_DIR`, absolute `dir:` → kept as-is) |
-
-If a remote Taskfile includes a local Taskfile (or vice-versa), each variable
-reflects the source of the Taskfile it refers to.
-
 ## Security
 
 ### Automatic checksums

website/src/docs/reference/templating.md

@@ -565,9 +565,6 @@ tasks:
       - echo "{{.MULTILINE | catLines}}"          # Replace newlines with spaces
 ```
 
-In pipeline form, `join` receives the list from the left-hand side. The
-equivalent non-pipeline form is `{{join " " .WORDS}}`.
-
 #### Shell Argument Parsing
 
 ```yaml