feat: add session autocompletions

internal/cli/attach_cmd.go

@@ -10,11 +10,12 @@ import (
 )
 
 var attachCmd = &cobra.Command{
-	Use:     "attach [key]",
-	Aliases: []string{"a"},
-	Short:   "Attach to a tmux session",
-	Args:    cobra.MaximumNArgs(1),
-	RunE:    runAttach,
+	Use:               "attach [key]",
+	Aliases:           []string{"a"},
+	Short:             "Attach to a tmux session",
+	Args:              cobra.MaximumNArgs(1),
+	RunE:              runAttach,
+	ValidArgsFunction: completeSessionNames,
 }
 
 func runAttach(cmd *cobra.Command, args []string) error {

internal/cli/remove_cmd.go

@@ -11,11 +11,12 @@ import (
 var removeLocal bool
 
 var removeCmd = &cobra.Command{
-	Use:     "remove <key>",
-	Aliases: []string{"rm"},
-	Short:   "Remove a tmux workspace from the config file",
-	Args:    cobra.ExactArgs(1),
-	RunE:    runRemove,
+	Use:               "remove <key>",
+	Aliases:           []string{"rm"},
+	Short:             "Remove a tmux workspace from the config file",
+	Args:              cobra.ExactArgs(1),
+	RunE:              runRemove,
+	ValidArgsFunction: completeSessionNames,
 }
 
 func init() {

internal/cli/root.go

@@ -52,6 +52,29 @@ It supports complex pane layouts, fzf selection, and config merging.`,
 	RunE:              runMain,
 	SilenceErrors:     true, // We handle error printing in Execute()
 	SilenceUsage:      true, // Don't print usage on runtime errors
+	ValidArgsFunction: completeSessionNames,
+}
+
+// completeSessionNames returns session names for shell completion
+func completeSessionNames(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+	// Don't complete if we already have an argument
+	if len(args) > 0 {
+		return nil, cobra.ShellCompDirectiveNoFileComp
+	}
+
+	cfg, err := config.GetTmuxConfig()
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveNoFileComp
+	}
+
+	var names []string
+	for name := range cfg {
+		if name != config.ConfigKey {
+			names = append(names, name)
+		}
+	}
+
+	return names, cobra.ShellCompDirectiveNoFileComp
 }
 
 // initConfig loads global configuration and applies settings

internal/cli/show_cmd.go

@@ -12,11 +12,12 @@ import (
 var showJSON bool
 
 var showCmd = &cobra.Command{
-	Use:     "show [key]",
-	Aliases: []string{"s"},
-	Short:   "Show the tmux configuration for a specific key",
-	Args:    cobra.MaximumNArgs(1),
-	RunE:    runShow,
+	Use:               "show [key]",
+	Aliases:           []string{"s"},
+	Short:             "Show the tmux configuration for a specific key",
+	Args:              cobra.MaximumNArgs(1),
+	RunE:              runShow,
+	ValidArgsFunction: completeSessionNames,
 }
 
 func init() {