feat(rig): support parking multiple rigs in single call

- gt rig park now accepts variadic args (fixes #375)
- gt rig unpark updated for consistency
- Errors collected and reported at end

Also fixes test self-interruption bug where sling tests sent real
tmux nudges containing "Work slung: gt-wisp-xyz", causing agents
running tests to interrupt themselves. Added GT_TEST_NO_NUDGE env
var to skip nudge during tests.

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

internal/cmd/rig_park.go

@@ -18,9 +18,9 @@ const RigStatusKey = "status"
 const RigStatusParked = "parked"
 
 var rigParkCmd = &cobra.Command{
-	Use:   "park <rig>",
+	Use:   "park <rig>...",
-	Short: "Park a rig (stops agents, daemon won't auto-restart)",
+	Short: "Park one or more rigs (stops agents, daemon won't auto-restart)",
-	Long: `Park a rig to temporarily disable it.
+	Long: `Park rigs to temporarily disable them.
 
 Parking a rig:
   - Stops the witness if running
@@ -35,15 +35,15 @@ This is a Level 1 (local/ephemeral) operation:
 
 Examples:
   gt rig park gastown
-  gt rig park beads`,
+  gt rig park beads gastown mayor`,
-	Args: cobra.ExactArgs(1),
+	Args: cobra.MinimumNArgs(1),
 	RunE: runRigPark,
 }
 
 var rigUnparkCmd = &cobra.Command{
-	Use:   "unpark <rig>",
+	Use:   "unpark <rig>...",
-	Short: "Unpark a rig (allow daemon to auto-restart agents)",
+	Short: "Unpark one or more rigs (allow daemon to auto-restart agents)",
-	Long: `Unpark a rig to resume normal operation.
+	Long: `Unpark rigs to resume normal operation.
 
 Unparking a rig:
   - Removes the parked status from the wisp layer
@@ -52,8 +52,8 @@ Unparking a rig:
 
 Examples:
   gt rig unpark gastown
-  gt rig unpark beads`,
+  gt rig unpark beads gastown mayor`,
-	Args: cobra.ExactArgs(1),
+	Args: cobra.MinimumNArgs(1),
 	RunE: runRigUnpark,
 }
 
@@ -63,8 +63,25 @@ func init() {
 }
 
 func runRigPark(cmd *cobra.Command, args []string) error {
-	rigName := args[0]
+	var errs []error
 
+	for _, rigName := range args {
+		if err := parkOneRig(rigName); err != nil {
+			errs = append(errs, fmt.Errorf("%s: %w", rigName, err))
+		}
+	}
+
+	if len(errs) > 0 {
+		for _, err := range errs {
+			fmt.Printf("%s %v\n", style.Error.Render("✗"), err)
+		}
+		return fmt.Errorf("failed to park %d rig(s)", len(errs))
+	}
+
+	return nil
+}
+
+func parkOneRig(rigName string) error {
 	// Get rig and town root
 	townRoot, r, err := getRig(rigName)
 	if err != nil {
@@ -120,8 +137,25 @@ func runRigPark(cmd *cobra.Command, args []string) error {
 }
 
 func runRigUnpark(cmd *cobra.Command, args []string) error {
-	rigName := args[0]
+	var errs []error
 
+	for _, rigName := range args {
+		if err := unparkOneRig(rigName); err != nil {
+			errs = append(errs, fmt.Errorf("%s: %w", rigName, err))
+		}
+	}
+
+	if len(errs) > 0 {
+		for _, err := range errs {
+			fmt.Printf("%s %v\n", style.Error.Render("✗"), err)
+		}
+		return fmt.Errorf("failed to unpark %d rig(s)", len(errs))
+	}
+
+	return nil
+}
+
+func unparkOneRig(rigName string) error {
 	// Get rig and town root
 	townRoot, _, err := getRig(rigName)
 	if err != nil {

internal/cmd/sling_helpers.go

@@ -175,6 +175,11 @@ func injectStartPrompt(pane, beadID, subject, args string) error {
 		return fmt.Errorf("no target pane")
 	}
 
+	// Skip nudge during tests to prevent agent self-interruption
+	if os.Getenv("GT_TEST_NO_NUDGE") != "" {
+		return nil
+	}
+
 	// Build the prompt to inject
 	var prompt string
 	if args != "" {

internal/cmd/sling_test.go

@@ -292,6 +292,9 @@ exit 0
 	slingVars = nil
 	slingOnTarget = "gt-abc123"
 
+	// Prevent real tmux nudge from firing during tests (causes agent self-interruption)
+	t.Setenv("GT_TEST_NO_NUDGE", "1")
+
 	if err := runSling(nil, []string{"mol-review"}); err != nil {
 		t.Fatalf("runSling: %v", err)
 	}
@@ -452,6 +455,9 @@ exit 0
 	slingVars = nil
 	slingOnTarget = "gt-abc123"
 
+	// Prevent real tmux nudge from firing during tests (causes agent self-interruption)
+	t.Setenv("GT_TEST_NO_NUDGE", "1")
+
 	if err := runSling(nil, []string{"mol-review"}); err != nil {
 		t.Fatalf("runSling: %v", err)
 	}