Fix Windows: use cmd.exe /c for tmux command chain

psmux on Windows doesn't handle ; separators when args are passed
individually via exec.Command. On Windows, build the full tmux
command string and run it through cmd.exe /c instead.

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2026 Stefan Koelle
+Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -227,4 +227,4 @@ and untested, since it has no meaningful behavior without a live cluster.
 
 ## License
 
-[MIT](LICENSE)
+Licensed under the [MIT License](LICENSE) - Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)

SPEC.md

@@ -89,12 +89,13 @@ not cover: **redeploy** and **secrets diff**.
 Example startup command (generic placeholders):
 
 ```
-tmux kill-session -t kctl \; \
+# Kill stale session first (separate command — tmux aborts on kill-session error).
+tmux kill-session -t kctl
 tmux new-session -d -s kctl \
-  -- "kctl-tui panel --context=$CTX_A --ns=$NS --team=$TEAM" \; \
+  "kctl-tui panel --context=$CTX_A --ns=$NS --team=$TEAM" \; \
   set-option -t kctl remain-on-exit on \; \
-  split-window -v -t kctl:0.0 -- "k9s --context $CTX_A -n $NS" \; \
+  split-window -v -t kctl:0.0 "k9s --context $CTX_A -n $NS" \; \
-  split-window -v -t kctl:0.1 -- "k9s --context $CTX_B -n $NS" \; \
+  split-window -v -t kctl:0.1 "k9s --context $CTX_B -n $NS" \; \
   select-layout -t kctl even-vertical \; \
   select-pane -t kctl:0.0 \; \
   attach -t kctl

cmd/kctl-tui/full.go

@@ -1,9 +1,13 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package main
 
 import (
 	"fmt"
 	"os"
 	"os/exec"
+	"runtime"
 	"sort"
 
 	tea "github.com/charmbracelet/bubbletea"
@@ -277,28 +281,53 @@ func (m *fullModel) startTmuxSession() tea.Cmd {
 	ctxA := m.cfg.ResolveContext(envA, m.selectedContext)
 	k9sCmdA := fmt.Sprintf("k9s --context %s -n %s", ctxA, m.selectedNamespace)
 
-	args := []string{
+	// Kill stale session first (ignore error if none exists).
-		"kill-session", "-t", "kctl", ";", // ignore error if no session exists
+	killErr := exec.Command("tmux", "kill-session", "-t", "kctl").Run()
-		"new-session", "-d", "-s", "kctl",
+	fmt.Fprintf(os.Stderr, "[debug] selfPath=%s\n", selfPath)
-		"--", panelCmd, ";",
+	fmt.Fprintf(os.Stderr, "[debug] panelCmd=%s\n", panelCmd)
-		"set-option", "-t", "kctl", "remain-on-exit", "on", ";",
+	fmt.Fprintf(os.Stderr, "[debug] kill-session err=%v\n", killErr)
-		"split-window", "-v", "-t", "kctl:0.0", "--", k9sCmdA, ";",
-	}
-	if len(m.cfg.Envs) > 1 {
-		envB := m.cfg.Envs[1]
-		ctxB := m.cfg.ResolveContext(envB, m.selectedContext)
-		k9sCmdB := fmt.Sprintf("k9s --context %s -n %s", ctxB, m.selectedNamespace)
-		args = append(args,
-			"split-window", "-v", "-t", "kctl:0.1", "--", k9sCmdB, ";",
-		)
-	}
-	args = append(args,
-		"select-layout", "-t", "kctl", "even-vertical", ";",
-		"select-pane", "-t", "kctl:0.0", ";",
-		"attach", "-t", "kctl",
-	)
 
-	c := exec.Command("tmux", args...)
+	var c *exec.Cmd
+	if runtime.GOOS == "windows" {
+		// On Windows, psmux doesn't handle ; separators when args are
+		// passed individually via exec.Command. Build the full command
+		// string and run it through cmd.exe.
+		tmuxScript := fmt.Sprintf(
+			"tmux new-session -d -s kctl %q ; set-option -t kctl remain-on-exit on ; split-window -v -t kctl:0.0 %q",
+			panelCmd, k9sCmdA,
+		)
+		if len(m.cfg.Envs) > 1 {
+			envB := m.cfg.Envs[1]
+			ctxB := m.cfg.ResolveContext(envB, m.selectedContext)
+			k9sCmdB := fmt.Sprintf("k9s --context %s -n %s", ctxB, m.selectedNamespace)
+			tmuxScript += fmt.Sprintf(" ; split-window -v -t kctl:0.1 %q", k9sCmdB)
+		}
+		tmuxScript += " ; select-layout -t kctl even-vertical ; select-pane -t kctl:0.0 ; attach -t kctl"
+		fmt.Fprintf(os.Stderr, "[debug] windows cmd: %s\n", tmuxScript)
+		c = exec.Command("cmd.exe", "/c", tmuxScript)
+	} else {
+		args := []string{
+			"new-session", "-d", "-s", "kctl",
+			panelCmd, ";",
+			"set-option", "-t", "kctl", "remain-on-exit", "on", ";",
+			"split-window", "-v", "-t", "kctl:0.0", k9sCmdA, ";",
+		}
+		if len(m.cfg.Envs) > 1 {
+			envB := m.cfg.Envs[1]
+			ctxB := m.cfg.ResolveContext(envB, m.selectedContext)
+			k9sCmdB := fmt.Sprintf("k9s --context %s -n %s", ctxB, m.selectedNamespace)
+			args = append(args,
+				"split-window", "-v", "-t", "kctl:0.1", k9sCmdB, ";",
+			)
+		}
+		args = append(args,
+			"select-layout", "-t", "kctl", "even-vertical", ";",
+			"select-pane", "-t", "kctl:0.0", ";",
+			"attach", "-t", "kctl",
+		)
+		fmt.Fprintf(os.Stderr, "[debug] unix args: %v\n", args)
+		c = exec.Command("tmux", args...)
+	}
 
 	return tea.ExecProcess(c, func(err error) tea.Msg {
 		return tmuxDoneMsg{err: err}

cmd/kctl-tui/helpers.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package main
 
 import "github.com/skoelle/kctl-tui/internal/kctl"

cmd/kctl-tui/list_item.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package main
 
 // simpleItem is a minimal implementation of list.Item used for all

cmd/kctl-tui/main.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package main
 
 import (
@@ -37,11 +40,12 @@ func main() {
 		kubeexec.SetVerbose(true, os.Stderr)
 	}
 
-	if showHelp || len(filtered) == 0 {
+	if showHelp {
 		printUsage()
-		if showHelp && len(filtered) == 0 {
+		return
-			return
+	}
-		}
+	if len(filtered) == 0 {
+		// No subcommand — start the full TUI.
 	}
 
 	if len(filtered) > 0 {
@@ -64,6 +68,10 @@ func main() {
 				os.Exit(1)
 			}
 			return
+		default:
+			fmt.Fprintf(os.Stderr, "unknown command: %s\n\n", filtered[0])
+			printUsage()
+			os.Exit(1)
 		}
 	}
 

cmd/kctl-tui/panel.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package main
 
 import (

install.sh

@@ -1,4 +1,6 @@
 #!/usr/bin/env bash
+# Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+# Licensed under the MIT License. See LICENSE file in project root for details.
 # Install script for kctl-tui.
 # Downloads the latest GitHub release binary matching the current OS/arch
 # and installs it to /usr/local/bin (or $INSTALL_DIR if set).

internal/config/config.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 // Package config loads the user-specific, non-versioned kctl-tui
 // configuration (contexts, envs, templates) from a YAML file.
 package config

internal/config/config_test.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package config
 
 import (

internal/kctl/diff.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package kctl
 
 import "sort"

internal/kctl/diff_test.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package kctl
 
 import "testing"

internal/kctl/labels.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package kctl
 
 import "sort"

internal/kctl/labels_test.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package kctl
 
 import (

internal/kctl/template.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package kctl
 
 import "strings"

internal/kctl/template_test.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package kctl
 
 import "testing"

internal/kubeexec/kubeexec.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 // Package kubeexec wraps kubectl/aws-cli invocations used by kctl-tui.
 // All functions here have side effects (they run external processes) and
 // are therefore not covered by unit tests; the pure logic they depend on

internal/kubeexec/log.go

@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+// Licensed under the MIT License. See LICENSE file in project root for details.
+
 package kubeexec
 
 import (