refactor: Extract helpers from runStart in start.go (gt-tkbd5)

Reduced runStart from 126 lines to 48 lines by extracting:
- startCoreAgents: Mayor and Deacon session startup (28 lines)
- startRigAgents: Witness/Refinery startup for --all flag (37 lines)
- startConfiguredCrew: Auto-start configured crew members (29 lines)

No behavior change - all existing tests pass.

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

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

internal/cmd/start.go

@@ -148,6 +148,35 @@ func runStart(cmd *cobra.Command, args []string) error {
 
 	fmt.Printf("Starting Gas Town from %s\n\n", style.Dim.Render(townRoot))
 
+	// Start core agents (Mayor and Deacon)
+	if err := startCoreAgents(t); err != nil {
+		return err
+	}
+
+	// If --all, start witnesses and refineries for all rigs
+	if startAll {
+		fmt.Println()
+		fmt.Println("Starting rig agents...")
+		startRigAgents(t, townRoot)
+	}
+
+	// Auto-start configured crew for each rig
+	fmt.Println()
+	fmt.Println("Starting configured crew...")
+	startConfiguredCrew(t, townRoot)
+
+	fmt.Println()
+	fmt.Printf("%s Gas Town is running\n", style.Bold.Render("✓"))
+	fmt.Println()
+	fmt.Printf("  Attach to Mayor:  %s\n", style.Dim.Render("gt mayor attach"))
+	fmt.Printf("  Attach to Deacon: %s\n", style.Dim.Render("gt deacon attach"))
+	fmt.Printf("  Check status:     %s\n", style.Dim.Render("gt status"))
+
+	return nil
+}
+
+// startCoreAgents starts Mayor and Deacon sessions.
+func startCoreAgents(t *tmux.Tmux) error {
 	// Start Mayor first (so Deacon sees it as up)
 	mayorRunning, _ := t.HasSession(MayorSessionName)
 	if mayorRunning {
@@ -172,15 +201,18 @@ func runStart(cmd *cobra.Command, args []string) error {
 		fmt.Printf("  %s Deacon started\n", style.Bold.Render("✓"))
 	}
 
-	// If --all, start witnesses and refineries for all rigs
+	return nil
-	if startAll {
+}
-		fmt.Println()
-		fmt.Println("Starting rig agents...")
 
+// startRigAgents starts witness and refinery for all rigs.
+// Called when --all flag is passed to gt start.
+func startRigAgents(t *tmux.Tmux, townRoot string) {
 	rigs, err := discoverAllRigs(townRoot)
 	if err != nil {
 		fmt.Printf("  %s Could not discover rigs: %v\n", style.Dim.Render("○"), err)
-		} else {
+		return
+	}
+
 	for _, r := range rigs {
 		// Start Witness
 		witnessSession := fmt.Sprintf("gt-%s-witness", r.Name)
@@ -211,16 +243,15 @@ func runStart(cmd *cobra.Command, args []string) error {
 		}
 	}
 }
-	}
-
-	// Auto-start configured crew for each rig
-	fmt.Println()
-	fmt.Println("Starting configured crew...")
 
+// startConfiguredCrew starts crew members configured in rig settings.
+func startConfiguredCrew(t *tmux.Tmux, townRoot string) {
 	rigs, err := discoverAllRigs(townRoot)
 	if err != nil {
 		fmt.Printf("  %s Could not discover rigs: %v\n", style.Dim.Render("○"), err)
-	} else {
+		return
+	}
+
 	startedAny := false
 	for _, r := range rigs {
 		crewToStart := getCrewToStart(r)
@@ -229,7 +260,6 @@ func runStart(cmd *cobra.Command, args []string) error {
 			if running, _ := t.HasSession(sessionID); running {
 				fmt.Printf("  %s %s/%s already running\n", style.Dim.Render("○"), r.Name, crewName)
 			} else {
-					// Start the crew member using the existing runStartCrew logic
 				if err := startCrewMember(r.Name, crewName, townRoot); err != nil {
 					fmt.Printf("  %s %s/%s failed: %v\n", style.Dim.Render("○"), r.Name, crewName, err)
 				} else {
@@ -239,21 +269,12 @@ func runStart(cmd *cobra.Command, args []string) error {
 			}
 		}
 	}
+
 	if !startedAny {
 		fmt.Printf("  %s No crew configured or all already running\n", style.Dim.Render("○"))
 	}
 }
 
-	fmt.Println()
-	fmt.Printf("%s Gas Town is running\n", style.Bold.Render("✓"))
-	fmt.Println()
-	fmt.Printf("  Attach to Mayor:  %s\n", style.Dim.Render("gt mayor attach"))
-	fmt.Printf("  Attach to Deacon: %s\n", style.Dim.Render("gt deacon attach"))
-	fmt.Printf("  Check status:     %s\n", style.Dim.Render("gt status"))
-
-	return nil
-}
-
 // discoverAllRigs finds all rigs in the workspace.
 func discoverAllRigs(townRoot string) ([]*rig.Rig, error) {
 	rigsConfigPath := filepath.Join(townRoot, "mayor", "rigs.json")
@@ -728,7 +749,7 @@ func runStartCrew(cmd *cobra.Command, args []string) error {
 			// Wait for Claude to start, then prime
 			shells := []string{"bash", "zsh", "sh", "fish", "tcsh", "ksh"}
 			if err := t.WaitForCommand(sessionID, shells, 15*time.Second); err != nil {
-				fmt.Printf("Warning: Timeout waiting for Claude to start: %v\n", err)
+				style.PrintWarning("Timeout waiting for Claude to start: %v", err)
 			}
 			time.Sleep(500 * time.Millisecond)
 			if err := t.SendKeys(sessionID, "gt prime"); err != nil {
@@ -772,7 +793,7 @@ func runStartCrew(cmd *cobra.Command, args []string) error {
 		// Wait for Claude to start
 		shells := []string{"bash", "zsh", "sh", "fish", "tcsh", "ksh"}
 		if err := t.WaitForCommand(sessionID, shells, 15*time.Second); err != nil {
-			fmt.Printf("Warning: Timeout waiting for Claude to start: %v\n", err)
+			style.PrintWarning("Timeout waiting for Claude to start: %v", err)
 		}
 
 		// Give Claude time to initialize after process starts