2 files changed, 74 insertions, 6 deletions
diff --git a/cmd/hexai-tmux-edit/main.go b/cmd/hexai-tmux-edit/main.go
index ea3330b..6d0e75e 100644
--- a/cmd/hexai-tmux-edit/main.go
+++ b/cmd/hexai-tmux-edit/main.go
@@ -21,6 +21,9 @@ import (
 	"codeberg.org/snonux/hexai/internal/tmuxedit"
 )
 
+// runTmuxEdit is the seam for testing: override in tests to avoid real tmux.
+var runTmuxEdit = tmuxedit.Run
+
 func main() {
 	defaultPath := appconfig.DefaultConfigPath()
 	configPath := flag.String("config", "", fmt.Sprintf("path to config file (default: %s)", defaultPath))
@@ -28,13 +31,19 @@ func main() {
 	pane := flag.String("pane", "", "tmux target pane ID (e.g. %%5)")
 	flag.Parse()
 
-	opts := tmuxedit.Options{
-		ConfigPath: strings.TrimSpace(*configPath),
-		Agent:      strings.TrimSpace(*agent),
-		Pane:       strings.TrimSpace(*pane),
-	}
-	if err := tmuxedit.Run(opts); err != nil {
+	opts := buildOptions(*configPath, *agent, *pane)
+	if err := runTmuxEdit(opts); err != nil {
 		fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)
 	}
 }
+
+// buildOptions constructs tmuxedit.Options from the parsed flag values,
+// trimming whitespace from each field.
+func buildOptions(configPath, agent, pane string) tmuxedit.Options {
+	return tmuxedit.Options{
+		ConfigPath: strings.TrimSpace(configPath),
+		Agent:      strings.TrimSpace(agent),
+		Pane:       strings.TrimSpace(pane),
+	}
+}
diff --git a/cmd/hexai-tmux-edit/main_test.go b/cmd/hexai-tmux-edit/main_test.go
new file mode 100644
index 0000000..fc2364c
--- /dev/null
+++ b/cmd/hexai-tmux-edit/main_test.go
@@ -0,0 +1,59 @@
+package main
+
+import (
+	"errors"
+	"testing"
+
+	"codeberg.org/snonux/hexai/internal/tmuxedit"
+)
+
+func TestBuildOptions_AllEmpty(t *testing.T) {
+	opts := buildOptions("", "", "")
+	if opts.ConfigPath != "" || opts.Agent != "" || opts.Pane != "" {
+		t.Fatalf("expected all empty, got %+v", opts)
+	}
+}
+
+func TestBuildOptions_TrimsWhitespace(t *testing.T) {
+	opts := buildOptions("  /tmp/cfg.toml  ", "  claude  ", "  %5  ")
+	if opts.ConfigPath != "/tmp/cfg.toml" {
+		t.Fatalf("expected trimmed config path, got %q", opts.ConfigPath)
+	}
+	if opts.Agent != "claude" {
+		t.Fatalf("expected trimmed agent, got %q", opts.Agent)
+	}
+	if opts.Pane != "%5" {
+		t.Fatalf("expected trimmed pane, got %q", opts.Pane)
+	}
+}
+
+func TestRunTmuxEdit_Success(t *testing.T) {
+	old := runTmuxEdit
+	t.Cleanup(func() { runTmuxEdit = old })
+
+	var gotOpts tmuxedit.Options
+	runTmuxEdit = func(opts tmuxedit.Options) error {
+		gotOpts = opts
+		return nil
+	}
+
+	opts := buildOptions("/tmp/cfg.toml", "cursor", "%3")
+	if err := runTmuxEdit(opts); err != nil {
+		t.Fatalf("runTmuxEdit: %v", err)
+	}
+	if gotOpts.ConfigPath != "/tmp/cfg.toml" || gotOpts.Agent != "cursor" || gotOpts.Pane != "%3" {
+		t.Fatalf("unexpected opts: %+v", gotOpts)
+	}
+}
+
+func TestRunTmuxEdit_Error(t *testing.T) {
+	old := runTmuxEdit
+	t.Cleanup(func() { runTmuxEdit = old })
+
+	wantErr := errors.New("tmux not found")
+	runTmuxEdit = func(_ tmuxedit.Options) error { return wantErr }
+
+	if err := runTmuxEdit(tmuxedit.Options{}); !errors.Is(err, wantErr) {
+		t.Fatalf("expected error, got: %v", err)
+	}
+}