fix(crew): default to --all when only rig name provided (gt-s8mpt)

gt crew start beads and gt crew stop beads now default to --all
behavior when no crew names are specified, matching user expectations.

- crew start: accepts 0-1 args (rig only) and starts all crew
- crew stop: detects if single arg is a rig name vs crew name
- Updated help text with new examples

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/cmd/crew.go

@@ -246,25 +246,23 @@ var crewStartCmd = &cobra.Command{
 	Long: `Start crew workers in a rig, creating workspaces if they don't exist.
 
 The rig name can be provided as the first argument, or inferred from the
-current directory. Optionally specify crew member names to start specific
-workers, or use --all to start all crew members in the rig.
+current directory. If no crew names are specified, starts all crew in the rig.
 
 The crew session starts in the background with Claude running and ready.
 
 Examples:
-  gt crew start gastown joe       # Start joe in gastown rig
-  gt crew start gastown --all     # Start all crew in gastown rig
-  gt crew start --all             # Start all crew (rig inferred from cwd)
-  gt crew start beads grip fang   # Start grip and fang in beads rig`,
+  gt crew start beads             # Start all crew in beads rig
+  gt crew start                   # Start all crew (rig inferred from cwd)
+  gt crew start beads grip fang   # Start specific crew in beads rig
+  gt crew start gastown joe       # Start joe in gastown rig`,
 	Args: func(cmd *cobra.Command, args []string) error {
 		// With --all, we can have 0 args (infer rig) or 1+ args (rig specified)
 		if crewAll {
 			return nil
 		}
-		// Without --all, need at least rig and one crew name
-		if len(args) < 2 {
-			return fmt.Errorf("requires rig and crew name, or use --all")
-		}
+		// Allow: 0 args (infer rig, default to --all)
+		//        1 arg  (rig specified, default to --all)
+		//        2+ args (rig + specific crew names)
 		return nil
 	},
 	RunE: runCrewStart,
@@ -275,8 +273,8 @@ var crewStopCmd = &cobra.Command{
 	Short: "Stop crew workspace session(s)",
 	Long: `Stop one or more running crew workspace sessions.
 
-Kills the tmux session(s) for the specified crew member(s). Use --all to
-stop all running crew sessions across all rigs.
+If a rig name is given alone, stops all crew in that rig. Otherwise stops
+the specified crew member(s).
 
 The name can include the rig in slash format (e.g., beads/emma).
 If not specified, the rig is inferred from the current directory.
@@ -285,11 +283,11 @@ Output is captured before stopping for debugging purposes (use --force
 to skip capture for faster shutdown).
 
 Examples:
-  gt crew stop dave                         # Stop dave's session
-  gt crew stop beads/emma beads/grip        # Stop multiple from specific rig
+  gt crew stop beads                        # Stop all crew in beads rig
+  gt crew stop                              # Stop all crew (rig inferred from cwd)
+  gt crew stop beads/emma                   # Stop specific crew member
+  gt crew stop dave                         # Stop dave in current rig
   gt crew stop --all                        # Stop all running crew sessions
-  gt crew stop --all --rig beads            # Stop all crew in beads rig
-  gt crew stop --all --dry-run              # Preview what would be stopped
   gt crew stop dave --force                 # Stop without capturing output`,
 	Args: func(cmd *cobra.Command, args []string) error {
 		if crewAll {
@@ -298,9 +296,9 @@ Examples:
 			}
 			return nil
 		}
-		if len(args) < 1 {
-			return fmt.Errorf("requires at least 1 argument (or --all)")
-		}
+		// Allow: 0 args (infer rig, default to --all)
+		//        1 arg  (rig name → all in that rig, or crew name → specific crew)
+		//        1+ args (specific crew names)
 		return nil
 	},
 	RunE: runCrewStop,

internal/cmd/crew_lifecycle.go

@@ -220,13 +220,13 @@ func runCrewRefresh(cmd *cobra.Command, args []string) error {
 
 // runCrewStart starts crew workers in a rig.
 // args[0] is the rig name (optional if inferrable from cwd)
-// args[1:] are crew member names (optional, or use --all flag)
+// args[1:] are crew member names (optional - defaults to all if not specified)
 func runCrewStart(cmd *cobra.Command, args []string) error {
 	var rigName string
 	var crewNames []string
 
 	if len(args) == 0 {
-		// No args - infer rig from cwd (only valid with --all)
+		// No args - infer rig from cwd
 		rigName = "" // getCrewManager will infer from cwd
 	} else {
 		rigName = args[0]
@@ -241,8 +241,8 @@ func runCrewStart(cmd *cobra.Command, args []string) error {
 	// Update rigName in case it was inferred
 	rigName = r.Name
 
-	// If --all flag, get all crew members
-	if crewAll {
+	// If --all flag OR no crew names specified, get all crew members
+	if crewAll || len(crewNames) == 0 {
 		workers, err := crewMgr.List()
 		if err != nil {
 			return fmt.Errorf("listing crew: %w", err)
@@ -543,13 +543,30 @@ func restartCrewSession(rigName, crewName, clonePath string) error {
 }
 
 // runCrewStop stops one or more crew workers.
-// Supports: "name", "rig/name" formats, or --all to stop all.
+// Supports: "name", "rig/name" formats, "rig" (to stop all in rig), or --all.
 func runCrewStop(cmd *cobra.Command, args []string) error {
 	// Handle --all flag
 	if crewAll {
 		return runCrewStopAll()
 	}
 
+	// Handle 0 args: default to all in inferred rig
+	if len(args) == 0 {
+		return runCrewStopAll()
+	}
+
+	// Handle 1 arg without "/": check if it's a rig name
+	// If so, stop all crew in that rig
+	if len(args) == 1 && !strings.Contains(args[0], "/") {
+		// Try to interpret as rig name
+		if _, _, err := getRig(args[0]); err == nil {
+			// It's a valid rig name - stop all crew in that rig
+			crewRig = args[0]
+			return runCrewStopAll()
+		}
+		// Not a rig name - fall through to treat as crew name
+	}
+
 	var lastErr error
 	t := tmux.NewTmux()